虫版47耳放折腾贴 虫虫小林版本47耳放DIY详细操作指南

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双木三林 D100 发烧解码器使用说明书

双木三林 D100 发烧解码器使用说明书

使用说明书Ver 1.0本说明书的内容可能会随版本更改, 如有变动, 恕不另行通知请将本音响系统安装在通风良好、阴凉、干燥、干净的位置,远离直射阳光热源、振动、灰尘、 潮湿或寒冷。

只能使用本机指定的电压。

使用高于指定数值的电压很危险,而且可能导致火灾,损坏本机或造成人身伤害。

对于使用高于指定电压造成的任何损害,我司将不负任何责任。

不要试图自行改造或修理本机。

如果需要任何服务,请与销售或者我司客服人员联系。

不管有任何理由,都没有打开机壳的必要。

如果打算长时间不使用本机(比如度假时),请从墙壁交流电源插座上断开电源线的连接。

一、服务期限 佛山双木三林科技有限公司承诺产品的良好品质,产品自售出之后7天内 正常使用情况下出现故障,客户可以选择退货或者保修(不影响二次销售 才可退货)。

正常使用一年内出现故障可以免费保修。

二、购买日期以销售商开出的购机发票或收据日期为准,网购可以交易截图为准。

三、有以下情况都不能享受“三包”服务 1.一切人为因素损坏,包括非正常工作环境下使用或不按照说明书使用。

2.用户私自拆机、改装、维修。

3.使用非指定或许可的配件造成损坏的。

4.机身的QC或保修贴损毁。

5.不能出示有效购机凭证。

6.不属于本公司产品。

四、保修方式为送修 此条款只适于中国大陆,其它地区请参考当地销售代理商的规定和国家法规。

重要提示:本说明书所提到的产品规格和资讯仅供参考。

如有内容更新,恕不另行通知。

迷你尺寸设计,非常适合桌面使用;CNC一体化铣削工艺,简约时尚;ESS科技高端数模芯片ES9038Q2M;高通最新蓝牙芯片支持LDAC 24bit/96kHz、APTX/HD、SBC、AAC;4片高端双运放OPA1612和大量音频级元器件;第二代XMOS方案支持DoP256和原生DSD512,PCM最高支持32bit/768kHz;音频专用时钟处理电路,大大降低时钟抖动;所有输入端口(蓝牙除外)均支持DSD传输,同轴和光纤支持DoP64;内置专门设计的低噪声开关电源;内置分立元件线性电源和多个模拟电路低噪声电源;高品质镀金输入输出连接端子;永不过时的钢化玻璃显示面板!日本音响协会(JAS)Hi-Res认证;配备全功能遥控器。

兄弟缝纫机 nv10说明书

兄弟缝纫机 nv10说明书
机器部件名称及其功能 ..................................................................................................8
缝纫机 ............................................................................................................................................8 针和压脚部分 .................................................................................................................................9 操作按钮 ..........................................................................................................................................9 操作面板 ..........................................................................................................................................10 附加工作台 .......................................................................................................................................10

自己动手-4合一耳放实战DIY

自己动手-4合一耳放实战DIY

一、耳放的作用。

耳放,是耳机放大器的简称,网上也俗称是耳机的二房。

目前很多高档耳机,都配有耳放,有些人也为中低档耳机、耳塞添加了耳放。

那么,耳放到底有什么作用,加不加耳放,能有多大区别呢?1,耳放作用之一,放大信号。

目前的很多音源,特别是以电池为电源的,为了降低成本、增加播放时间,输出功率都比较小,比如一般CD为10mW左右,有的CD,MD,MP3只有3-5mW,这与50-1000mW额定功率的耳机、耳塞不相适应。

虽然正常听音乐时,输出到耳机的功率只要几mW就足够了,低灵敏度的大耳机需要10mW以上,但这里的功率,是平均功率,对于大动态的音乐,峰值功率可能是平均功率的10-30倍,某些交响乐的峰值功率,可达平均功率的50倍以上,因此,1mW的平均输出功率,有时也需要30-50mW的最大输出能力,否则会出现波形削顶失真。

这个输出能力,对于很多小功率音源,甚至半数以上声卡,都是达不到的。

因此,如果耳机灵敏度不是很高,音源输出功率不是很大,加耳放,对于音质是会有明显提升的。

2,耳放作用之二,匹配阻抗。

如今的绝大部分声卡,都没有了耳机输出插孔,只有LINE OUT插孔。

但大部分人,仍直接将耳机插入LINE OUT插孔听音乐,其实这是不妥的。

LINE OUT输出阻抗很高,一般在数百至几千欧,接入功放或者耳放,阻抗可以完全匹配,接入几十欧的耳机,影响音质在所难免,而且,很多声卡输出电容只有100uF左右,甚至47uF,接入低阻耳机,会对低音信号造成严重衰减。

例如:47uF输出电容的声卡,接32欧耳机,低频截止频率在110Hz,也就是说,110Hz以下的低音,将被严重衰减,此时加耳放,对于音质的提升效果将会很明显。

3,耳放作用之三,调音作用。

很多人说,耳放就是为了保真,调音就是音染,与HIFI的目标背道而驰,调音没有必要。

我认为,适当的调音是允许的,甚至是有必要的,有以下几点原因:a,调音为了更加保真保真,是整个听音系统的事,除了耳放,还包括录音、音乐制作、音源器材、耳机(或音箱)、人耳,还有相关线材,而不仅仅是耳放1个环节的事,如果其他环节有了不可避免的失真,是有可能通过耳放调音来补偿的,虽然耳放不保真了,但整个听音系统会更加保真。

专业耳放完全DIY

专业耳放完全DIY

专业耳放完全DIY
吴红奎;吴红静
【期刊名称】《电子制作》
【年(卷),期】2007(000)004
【摘要】耳机放大器虽然输出功率不大,业余条件下要做好也并不容易,为了达到理想的水准,很多耳机放大器采用了分立元件,因为输出功率不大,采用A类放大器的不在少数,这在业余条件下并不容易做好,本文介绍的耳机放大器采用TI公司出品的专门的耳机放大器集成电路,适合业余条件下自制,也初步具备了专业素质。

【总页数】4页(P13-15,12)
【作者】吴红奎;吴红静
【作者单位】无
【正文语种】中文
【中图分类】TN643
【相关文献】
1.耳放卡之战 HIFIMAN901两款耳放卡对比 [J],
2.专业耳放完全DIY(下) [J], 吴红奎;吴红静
3.《专业耳放完全DIY》补遗 [J], 吴红奎
4.低压供电的胆石混合耳放DIY [J], 成辞
5.阻尼系数可调的神奇耳放DA&T谷津Q-i解码耳放 [J], 家祺[1];小路(图)[1]
因版权原因,仅展示原文概要,查看原文内容请购买。

Shure PGA48 狭窄类麦克风用户指南说明书

Shure PGA48 狭窄类麦克风用户指南说明书

© 2015 Shure Incorporated 27A25227 (Rev. 2)WIRED MICROPHONEPGA 48USER GUIDELe Guide de l’UtilisateurGuia del UsuarioGuida dell’UtenteРуководство пользователяBedienungsanleitung日本語繁體中文用户指南Manual do UsuárioGebruikershandleiding사용자 가이드Panduan PenggunaPG AL TA SERIESTM Printed in China2PGA48Proximity Effect Directional microphones progressively boost bass frequencies as the microphone is placed in closer proximity to the source. This phenomenon, known as proximity effect, can be used to create a warmer, more powerful sound.PG Alta Microphones Congratulations on the purchase of a new Shure PG Alta series microphone. The PG Alta series delivers professional quality audio at an affordable price, with solutions for capturing nearly any source, including voice, acoustic instruments, drums, and amplified electric instruments. Suitable for live and studio applications, PG Alta microphones are built to last, and meet the same rigorous quality testing standards that make all Shure products trustworthy and reliable. • Do not cover any part of the microphone grille with your hand, as this will adversely affect microphone performance.• Aim the microphone toward the desired sound source (such as the talker, singer, or instrument) and away from unwanted sources.• Place the microphone as close as practical to the desired sound source.• Work close to the microphone for extra bass response.• Use only one microphone to pick up a single sound source.• For better gain before feedback, use fewer microphones.• Keep the distance between microphones at least three times the distance from each microphone to its source (“three to one rule”).• Place microphones as far as possible from reflective surfaces.• Add a windscreen when using the microphone outdoors.• Avoid excessive handling to minimize pickup of mechanical noise and vibration.On/Off SwitchAvoiding Pickup of Unwanted Sound SourcesPlace the microphone so that unwanted sound sources, such as monitors and loudspeakers, are directly behind it. To minimize feedback and ensure optimum rejection of unwanted sound, always test microphone placement before a performance.Recommended Loudspeaker Locations for Cardioid Microphones3Sensitivity at 1 kHz, open circuit voltage -53.5 dBV/Pa¹ (2.10 mV)Polarity Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3Weight 300 g (10.58 oz.)Switch On/Off Switch Connector Three-pin professional audio (XLR), male Environmental Conditions Operating Temperature -20° to 165°F (-29° to 74°C)Relative Humidity 0 to 95%1 Pa=94 dB SPL Optional Accessories and Replacement Parts Microphone Clip for SM58, SM57, SM87A, Beta 87A, Beta 87C, PGA57, PGA58, PGA48, PGA81 Microphone Clip for SM58, SM57, SM87A, Beta 87A, Beta 87C, PGA57, PGA58, PGA48, PGA81 A25D 5/8" to 3/8" Thread Adapter 31A18567.6 m (25 ft.) Cable (XLR-XLR)C25J 25 foot (7.5m) Triple-Flex ®Microphone XLR Cable with chrome connectors C25F PGA48 Replacement Grille RPMP48GTypical Frequency Response1000 Hz Typical Polar PatternCertificationsThis product meets the Essential Requirements of all relevant European directives and is eligible for CE marking. The CE Declaration of Conformity can be obtained from: /europe/complianceAuthorized European representative:Shure Europe GmbH Headquarters Europe, Middle East & Africa Department: EMEA ApprovalJakob-Dieffenbacher-Str. 1275031 Eppingen, Germany Phone: 49-7262-92 49 0Fax: 49-7262-92 49 11 4Email:*************。

Datavideo MB-4DAC系列电池壳说明书

Datavideo MB-4DAC系列电池壳说明书

MB-4DAC SERIES BAT TERYHOLDER Instruction ManualTable of ContentsFCC COMPLIANCE STATEMENT (3)WARNINGS AND PRECAUTIONS (3)WARRANTY (5)S TANDARD W ARRANTY (5)T HREE Y EAR W ARRANTY (6)DISPOSAL (7)FEATURES (8)HOW TO MOUNT THE MB-4 (8)COMPATIBLE BATTERIES (9)NOTE (10)NOTE (11)SERVICE & SUPPORT (12)Disclaimer of Product & ServicesThe information offered in this instruction manual is intended as a guide only. At all times, Datavideo Technologies will try to give correct, complete and suitable information. However, Datavideo Technologies cannot exclude that some information in this manual, from time to time, may not be correct or may be incomplete. This manual may contain typing errors, omissions or incorrect information. Datavideo Technologies always recommend that you double check the information in this document for accuracy before making any purchase decision or using the product. Datavideo Technologies is not responsible for any omissions or errors, or for any subsequent loss or damage caused by using the information contained within this manual. Further advice on the content of this manual or on the product can be obtained by contacting your local Datavideo Office or dealer.FCC Compliance StatementThis device complies with part 15 of the FCC rules. Operation is subject to the following two conditions:(1)This device may not cause harmful interference, and(2)This device must accept any interference received, includinginterference that may cause undesired operation.Warnings and Precautions1.Read all of these warnings and save them for later reference.2.Follow all warnings and instructions marked on this unit.3.Unplug this unit from the wall outlet before cleaning. Do notuse liquid or aerosol cleaners. Use a damp cloth for cleaning.4.Do not use this unit in or near water.5.Do not place this unit on an unstable cart, stand, or table. Theunit may fall, causing serious damage.6.Slots and openings on the cabinet top, back, and bottom areprovided for ventilation. To ensure safe and reliable operation of this unit, and to protect it from overheating, do not block or cover these openings. Do not place this unit on a bed, sofa, rug, or similar surface, as the ventilation openings on the bottom of the cabinet will be blocked. This unit should never be placed near or over a heat register or radiator. This unit should not be placed in a built-in installation unless proper ventilation is provided.7.This product should only be operated from the type of powersource indicated on the marking label of the AC adapter. If you are not sure of the type of power available, consult your Datavideo dealer or your local power company.8.Do not allow anything to rest on the power cord. Do notlocate this unit where the power cord will be walked on, rolled over, or otherwise stressed.9.If an extension cord must be used with this unit, make surethat the total of the ampere ratings on the products pluggedinto the extension cord do not exceed the extension cord rating.10.Make sure that the total amperes of all the units that areplugged into a single wall outlet do not exceed 15 amperes. 11.Never push objects of any kind into this unit through thecabinet ventilation slots, as they may touch dangerous voltage points or short out parts that could result in risk of fire or electric shock. Never spill liquid of any kind onto or into this unit.12.Except as specifically explained elsewhere in this manual, donot attempt to service this product yourself. Opening or removing covers that are marked “Do Not Remove” may expose you to dangerous voltage points or other risks, and will void your warranty. Refer all service issues to qualified service personnel.13.Unplug this product from the wall outlet and refer to qualifiedservice personnel under the following conditions:a.When the power cord is damaged or frayed;b.When liquid has spilled into the unit;c.When the product has been exposed to rain or water;d.When the product does not operate normally undernormal operating conditions. Adjust only those controlsthat are covered by the operating instructions in thismanual; improper adjustment of other controls may resultin damage to the unit and may often require extensivework by a qualified technician to restore the unit to normaloperation;e.When the product has been dropped or the cabinet hasbeen damaged;f.When the product exhibits a distinct change inperformance, indicating a need for service.WarrantyStandard Warranty∙Datavideo equipment are guaranteed against any manufacturing defects for one year from the date of purchase. ∙The original purchase invoice or other documentary evidence should be supplied at the time of any request for repair under warranty.∙The product warranty period begins on the purchase date. If the purchase date is unknown, the product warranty period begins on the thirtieth day after shipment from a Datavideo office.∙All non-Datavideo manufactured products (product without Datavideo logo) have only one year warranty from the date of purchase.∙Damage caused by accident, misuse, unauthorized repairs, sand, grit or water is not covered under warranty.∙Viruses and malware infections on the computer systems are not covered under warranty.∙Any errors that are caused by unauthorized third-party software installations, which are not required by our computer systems, are not covered under warranty.∙All mail or transportation costs including insurance are at the expense of the owner.∙All other claims of any nature are not covered.∙All accessories including headphones, cables, and batteries are not covered under warranty.∙Warranty only valid in the country or region of purchase.∙Your statutory rights are not affected.Three Year Warranty∙All Datavideo products purchased afterJuly 1st, 2017 are qualified for a free twoyears extension to the standard warranty,providing the product is registered withDatavideo within 30 days of purchase.∙Certain parts with limited lifetime expectancy such as LCD panels, DVD drives, Hard Drive, Solid State Drive, SD Card, USB Thumb Drive, Lighting, Camera module, PCIe Card are covered for 1 year.∙The three-year warranty must be registered on Datavideo's official website or with your local Datavideo office or one of its authorized distributors within 30 days of purchase.DisposalFor EU Customers only - WEEE MarkingThis symbol on the product or on its packagingindicates that this product must not be disposed ofwith your other household waste. Instead, it is yourresponsibility to dispose of your waste equipmentby handing it over to a designated collection point for the recycling of waste electrical and electronic equipment. The separate collection and recycling of your waste equipment at the time of disposal will help to conserve natural resources and ensure that it is recycled in a manner that protects human health and the environment. For more information about where you can drop off your waste equipment for recycling, please contact your local city office, your household waste disposal service or the shop where you purchased the product.CE Marking is the symbol as shown on the left ofthis page. The letters "CE" are the abbreviation ofFrench phrase "Conformité Européene" whichliterally means "European Conformity". The term initially used was "EC Mark" and it was officially replaced by "CE Marking" in the Directive 93/68/EEC in 1993. "CE Marking" is now used in all EU official documents.Features∙Battery mount and adapter for DAC series∙Plate slides onto the bottom of the DAC∙Supports Sony, Panasonic, Canon (BP-945 / 970G only) and JVC 14.4V or 7.2V∙Makes your DAC completely portable∙Compatible with: DAC-60 | DAC-70 | DAC-8P | DAC-9P | VP-597 | TC-200 (Title generator for CG-200)How to mount the MB-4Use four screws (front and rear side) to secure the MB-4.Compatible batteriesNOTENOTE11/product/MB-4Jan-29.2019Ver.: E3。

GUITAR RIG 4教程

GUITAR RIG 4教程

走近会唱歌的物理学家——GITAR RIG 4Guitar Rig 4 是一款非常强大的吉他、贝司软效果器。

玩过电吉他的朋友应该对吉他类硬件效果器不陌生,当然,这里的软效果器也是相对而言的。

Guitar Rig 4自带了一些列的效果模块、拾音、扩音元件。

拥有了Guitar Rig 4 ,就如同一个宽敞明亮的房间里堆满了,名贵的音箱,放大器,麦克风,回放采样器,等各种优秀的硬件效果器一样。

自带的Rig Control 硬件踏板控制,是吉他录音的完美解决方案,Rig Control改良的极低延迟音频接口方式,同样也适用于现场演奏。

不要问我Rig Control在哪里下载。

一句话:如果你是吉他手,Guitar Rig 4 就是你的必备武器。

Guitar Rig 4 分为四个版本发售,分别为GO, LE, ESSENTIAL 和PRO。

不同版本价格也不一样,当然,自带的原件模块数量也不一样。

仅仅是原件数量上的差异而已,软件的功能都一样,就像两个相同牌子的钱包,决定你富裕程度,是看你钱包里钱的数量而不是钱包本身。

当然有些人会诧异:我就用一个模块可以调出版级的声音,这个比喻有点像别人啃几个馒头也可以顶几个月一样。

当然,不管你拥有哪个版本,如果想需要扩展Rig 4其他元件,就去官方会下载对应的元件模块包,可惜目前还没有正式发售,期待官方消息。

既然Rig 4这么好,那么咱们通过理论加实践的方式一起来学习她好在哪里。

除了Rig Control,Guitar Rig 4也支持其他外部MIDI控制器。

比如:TONE SHIFTER。

一、Guitar Rig 4更新功能。

悄悄挥别Guitar Rig 3,咱们来好好说说4给咱们带来的新功能。

当然,关于4的更新内容,在MIDIFAN首页有相关介绍。

我这里就不重复提了,在Pro 版本中新增了Top Lead 、Hotel Plex、Control Room、Grain Delay、Octaverb、Lceverb、Twin Delay元件,我们也将在文章的下半部分做详细的介绍和对比。

47耳放_完整版(转自中国音响DIY)

47耳放_完整版(转自中国音响DIY)

47耳放完整版(2010年参赛作品)网通发贴表示压力很大之前一直折腾功放听桌面音箱,半年前忽然打算用用耳机了,于是入了森海的HD595。

虽然50欧的阻抗不算高,但是要发挥出设备的实力耳放还是少不了的。

所以,决定自己动手做一个耳放。

这期间参考了大量关于耳放的资料,最终决定以47耳放电路为基础并加以改进制作一个比较完美的耳机放大器。

便动手做了起来。

下面分贴发一下耳放各部分的设计和制作过程个大家分享。

、因为本人对电路没有进行过系统的学习文章中存在大量文字存在自己的主观性理解可能错在大量问题希望高手及时指出虫虫小林2010-12-07 23:12:49一放大部分47耳放是一位外国人设计的电路,电路如图。

图1.gif因为电路中有较多以47为参数的元件所以称作47耳放。

传说中的47耳放结构其实是很简单的,第一级运放进行负反馈控制放大倍数进行比例放大,第二个运放进行电压跟随,降低放大器内阻,增加了输出电流,并做声音修饰。

两个运放输出经过两个47欧匀流电阻输出致耳机。

因为反馈取样点在47电阻之后,所以不用考虑电阻带来的损耗。

曾经在网上看过很多47耳放的PCB设计,虽然47耳放的电路十分简单,但是很多PCB却存在着或多或少的布线问题,有些抗干扰能力不是很强,甚至在淘宝上看到很多看似很漂亮的板子却有很大的交流声。

所以自己决定做一个比较完美的47耳放以便把这个电路的能力发挥出来。

于是,开工了。

首先是线路见图图2.jpg电路没有添加音量电位器,只做了放大部分。

这样一来功能比较独立,方便以后的各种组合。

47原设计使用的运放是OPA2132,这个运放是FET输入型的,所以内阻极高。

而且在低电压下可以正常工作,失调电压与失调电流极小,算是比较高档的运放了。

当然OPA2132的价格也是很高档的。

我作为0收入人士必然不能把这种高档传承下去,于是我选用了这年头满大街都是的NE5532。

NE5532虽然指标相对于OPA2132较差,但是工作于+-15V 时音色总体来说还是比较讨人喜欢的。

FLAMMA 吉他综合效果器FX150 说明书

FLAMMA 吉他综合效果器FX150 说明书
吉他综合效果器 中文说明书
www.flShenzhenFlammaInnovationCo.,Ltd
目录
注意事项-----------------------------------------------------------------------------------------------------------01 性能概述-----------------------------------------------------------------------------------------------------------02 主面板说明----------------------------------------------------------------------------------------------------03-04 接口面板说明-------------------------------------------------------------------------------------- -----------05-06 应用场景连接说明------------------------------------------------------------------------------------ --------07-12 连接吉他功放后级+吉他箱体--------------------------------------------------------------------------------07 连接全频设备 - -----------------------------------------------------------------------------------------------08 全频+非全频设备混合连接 ----------------------------------------------------------------------------------09 连接吉他音箱的INPUT - -------------------------------------------------------------------------------------10 连接吉他音箱的FXLOOP------------------------------------------------------------------------------------11 四线接法 -----------------------------------------------------------------------------------------------------12 基本操作------------------------------------------------------------------------ ------------------------------13-19 开机 ----------------------------------------------------------------------------------------------------------13 主界面--------------------------------------------------------------------------------------------------------13 编辑界面-----------------------------------------------------------------------------------------------------14 选择预置音色--------------------------------------------------------------------------------------------15-17 编辑预置音色 ------------------------------------------------------------------------------------------------18 编辑效果链顺序----------------------------------------------------------------------------------------------19 预置音色保存------------------------------------------------------------------------------------------------19 调音器-------------------------------------------------------------------- -----------------------------------------20 LOOPER乐句循环功能--------------------------------------------------------------------------------------21-22

YAMAHA MOTIF-RACK XS 说明书

YAMAHA MOTIF-RACK XS 说明书
• 正在向闪存存储器中写入数据时,切勿尝试关闭电源 (当 “Executing...”或 “Please keep power on”信息显示时)。此时 关闭电源会导致所有用户数据丢失,并且可能会引起系统死机 (由于闪存存储器中的数据损坏所致)。这表示即使下次打开电 源,该音源也可能会无法正常启动。 .
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MOTIF-RACK XS 使用说明书 5
前言
感谢您购买 Yamaha MOTIF-RACK XS 音源。 为了最大限度地发挥您新购买的 MOTIF-RACK XS 的性能,充分利用它的众多高级特性和功能,强烈建议您仔细 阅读本说明书,并将其保存在安全、可随时取用的地方,以便将来参考。
关于最新固件版本 Yamaha 可能会在不事先通知的情况下经常更新本产品的固件和附带的应用软件。我们建议您在我们的网站上查看最新型号以 及升级 MOTIF-RACK XS 或附带的应用软件的固件。 / 请注意,本使用说明书中的说明适用于制作本使用说明书时的固件版本。有关新型号的追加功能,请访问上述网站。
■ 使用说明书 (本书)
控制器与接口 (第 10 页) 此章节列举并说明了面板控制器 (如 LCD 和按钮)以及后面板的接口。
设定 (第 13 页) 此章节介绍如何在打开本乐器之前对其进行设定。
试听声音 (第 15 页) 此章节介绍如何播放示范乐曲和试听乐句。建议您花时间听一下这些乐曲和乐句,以便对 MOTIF-RACK XS 的高品 质声音及其强大性能有所了解。
■ 5 个旋钮 (第 29 页)
对 5 个旋钮的高级控制可实时调节参数值 (包括应用到音色和复合音色的效果设定),可让您在执行或录音时动态 改变声音。
■ 多种输入 / 输出端口 (第 12 页)

联想 Lecoo K2417F-24 显示器用户指南

联想 Lecoo K2417F-24 显示器用户指南

K2417F 用户指南目录第1章调整和使用显示器 (3)物品清单 (3)舒适和辅助功能 (4)安排您的工作区域 (4)放置显示器 (4)调整显示器图像 (5)使用直接访问控件 (5)使用On-Screen Display(OSD,屏幕显示)控件 (6)选择受支持的显示模式 (10)了解电源管理 (11)第2章参考信息 (12)显示器规格 (12)故障排除 (14)附录 A.服务和支持 (15)电话技术支持 (15)附录 B.电源线和电源适配器 (15)《废弃电器电子产品回收处理管理条例》提示性说明 (16)中国能源效率标识 (15)有害物质 (16)第1章调整和使用显示器物品清单本产品包装中应含有以下物品:1.信息页2.显示器3.支架4.底座5.信号线(HDMI线)6.电源适配器本节介绍如何调整和使用此显示器。

舒适和辅助功能良好的人体工程学设计对于舒适地使用个人计算机非常重要。

应根据您的个人需要和从事的工作类型,合理安排您的工作场所和使用的设备。

此外,健康的工作习惯也能帮助您在使用计算机时实现最佳效率和舒适程度。

安排您的工作区域使用高度适宜的工作台面和足够的工作区域以便您舒适地工作。

根据您使用资料和设备的方式,合理安排您的工作区域。

将常用的资料整齐有序地放在工作区域中,将频繁使用的物品(如计算机鼠标或电话)放在便于操作的位置。

设备的放置和设备对工作姿势非常重要。

以下主题介绍如何优化设备以实现和保持良好的工作姿势。

放置显示器为舒适地观看显示器,在放置和调整计算机显示器时应考虑下列因素:●眼睛和显示器屏幕之间建议的观看距离是1.5x屏幕对角线。

在狭小的办公室符合此要求距离的解决方案包括:使桌子与墙壁或隔板保持一定距离以便给显示器留出空间,使用平板或较小的显示屏并使显示器处于桌子边角,或将键盘放到一个可调的抽屉板中打造更深的工作台面。

●显示器高度:放置显示器时,使您头部和颈部处于自然舒适(垂直或竖立)的位置。

耳放DIY初级教程——RSAXP7(转载)

耳放DIY初级教程——RSAXP7(转载)

耳放DIY初级教程——RSAXP7(转载)/read.php?tid=984394&fpage=0&toread=&page=1耳放DIY初级教程——RSA XP7图片:图片:图片: 一、Ray Samuels Audio Emmeline XP-7介绍来自美国的RSA厂商在国内没有代理商,故知名度不高。

其比较热门的机器大多集中在随身耳放领域,如The Predat or、The Shadow、P51什么的。

还有名气很大的经典机型SR-71,虽然定位为随身,但是推动高阻耳机如HD650等也毫不含糊。

RSA的XP-7定位于台式机耳放,官方定价机身495美刀,外接电源225美刀,一起合买695美刀。

使用两节9V电池作为电源,同时也可使用自配的外置电源。

耳放架构为成熟经典的单运放OP + 缓冲BUF结构,原机搭配运放为AD797 AN作为前级放大,缓冲BUF634P作为后级推动。

可以注意到,以两节的9V电池作为电源供电和GRADO RA1的手法很类似,同时自家的SR71也同样为两节9V电池供电,SR71的电路架构也和XP7极其类似,也为OP+BUF形式,只是所用元件都是贴片元件,相当于小号版本的XP7。

最初购入XP7的原因是为了歌德PSK寻找耳放,纵观市场,合适歌德的低阻耳放并不多见,RA1推力合适但是声音素质有限。

SOLO声音透明中空,适合又蒙又闷的HD650但不适合歌德,莱曼不用考虑直接KO掉,RUDI的万金油RPX33没试过,估计还可以但是不会出彩,意大利的味道和美国歌德味也不一定对路,RUDI RP8一位朋友在安润试过,推歌德也是很不满意。

德国的SPL推歌德素质还可以但是比较白开水,会冲淡很多歌德味,不过这耳放推什么都开水。

日本ATH HA200 2是有名的低阻耳机,但是甜美细腻的风格也明显不对歌德的胃口。

日本另外一个低阻耳放是P1,风格上也不会很适合美国声。

另外本人对胆机比较抵制,EMP和HP-4这些东西就不考虑了。

卡西欧 CDP-200R 电子琴 用户说明书

卡西欧 CDP-200R 电子琴 用户说明书

Note Number
True voice
Velocity
Note ON Note OFF
After Touch
Key’s Ch’s
Pitch Bender
Control Change
0, 32 1
6, 38 7
10 11 64
Transmitted
1 1 - 16
Mode 3 X
0 - 127
O 9nH v = 1 - 127 X 9nH v = 0
Bank select Modulation Data entry Volume Pan Expression Hold 1
Program Change
66 67 91 93 100, 101 120 121
:True #
System Exclusive
System Common
: Song Pos : Song Sel : Tune
數位鋼琴的演奏 ....................................Ch-8
開機並演奏 ................................................................................... Ch-8 耳機的使用 ................................................................................... Ch-8 將鍵盤感應改設為觸鍵力度 (力度鍵盤).................. Ch-9 顯示幕對比度的調節 ............................................................... Ch-9 節拍器的使用 ........................................................................... Ch-10

SONAR7官方中文手册

SONAR7官方中文手册

Cakewalk SONAR 7官方中文手册美国Cakewalk公司 原著云天音乐网 饶磊 编译云天音乐网()版权所有 抄袭必究本文档所涉及的信息如有更改,孰不另行通知,Twelve Tone Systems公司不承担相应的义务。

此文档所描述的软件仅授权给已经合法取得许可证的用户使用。

软件只能在协议条款规定的范围内使用和复制。

除非协议特别允许,任何媒体复制该软件均属非法。

在没有得到Twelve Tone Systems 公司书面许可的任何情况下,本文件不得以任何形式、任何理由(电子的或机械的)进行复制或传播,包括复印和录制。

Copyright © 2007 Twelve Tone Systems, Inc. 版权所有。

ACID是Sony公司的注册商标。

Cakewalk是Twelve Tone Systems公司的注册商标。

SONAR和Cakewalk标志是Twelve Tone Systems公司的注册商标。

其它的公司和产品名称均是其拥有者的商标。

在互联网上访问Cakewalk英文站:。

在互联网上访问Cakewalk中文站:。

在互联网上访问云天音乐网:。

SONAR 7 官方中文手册0.目录0. 目录 (3)1. 编者的话 (6)2. 中文SONAR系列图书 (7)3. 前言 (9)4. SONAR 7 介绍 (11)7 新特性概览 (12)4.1. SONAR7 的系统需求 (13)4.2. SONAR4.3. SONAR7 新特性详解 (13)7 的峰值限制器-Boost 11 (17)4.4. SONAR7 包含的虚拟乐器 (17)4.5. SONAR4.6. SONAR7 的母带后期处理插件 (19)7Producer Edition(制作人版)和Studio Edition(工作室版)功能比较 (21)4.7. SONAR4.8. 选择SONAR 7的20个理由 (21)5. 安装 (28)6. 指南 (38)6.1. 指南1——基础 (39)6.1.1. 打开工程 (39)6.1.2. 回放准备 (39)6.1.3. 播放工程 (42)6.1.4. 自动重新开始工程 (44)6.1.5. 更改速度 (46)6.1.6. 静音和独奏 (47)6.1.7. 更改音轨乐器 (48)6.1.8. 在MIDI键盘上演奏音乐 (49)6.2. 指南2——录制MIDI (51)6.2.1. 创建新工程 (51)6.2.2. 录制MIDI音轨 (51)6.2.3. 保存 (54)6.2.4. 循环录制 (54)6.2.5. 插入录制 (56)6.3. 指南3——录制数字音频 (58)6.3.1. 设置采样率 (58)6.3.2. 设置音频驱动器的精度和录制精度 (58)6.3.3. 新建一个工程 (59)云天音乐网()版权所有 抄袭必究6.3.4. 设置音频轨 (59)6.3.5. 检查输入电平 (59)6.3.6. 录制数字音频 (60)6.3.7. 聆听录制结果 (60)6.3.8. 录制另外一个动机 (61)6.3.9. 输入监听 (61)6.3.10. 循环和插入录制 (62)6.3.11. 多通道录制 (62)6.4. 指南4——编辑MIDI (63)6.4.1. 移调 (63)6.4.2. 用托放的方法复制事件条 (63)6.4.3. 在钢琴卷帘视图里编辑音符 (64)6.4.4. 滑动编辑 (65)6.4.5. 绘制MIDI包络线 (66)6.4.6. 把MIDI转换成音频 (67)6.5. 指南5——编辑数字音频 (69)6.5.1. 打开工程 (69)6.5.2. 导入音频文件 (69)6.5.3. 移动以及循环事件条 (70)6.5.4. 对事件条进行滑动编辑 (70)6.5.5. 自动交叠淡变 (71)6.5.6. 合并音轨 (71)6.6. 指南6——使用智能事件条 (72)6.6.1. 添加智能事件条到工程里 (72)6.6.2. 循环智能事件条 (73)6.6.3. 更改智能事件条的音高 (75)6.6.4. 更该工程的速度 (76)6.6.5. 创建你自己的智能事件条 (76)6.7. 指南7——混音 (80)6.7.1. 添加实时的音频效果 (80)6.7.2. 对单独的效果设置自动控制 (80)6.7.3. 编组控制 (81)6.7.4. 对混音自动控制 (81)6.7.5. 导出MP3文件 (82)6.8. 指南8——使用软件合成器 (84)6.8.1. 把Cakewalk TTS-1插入到工程里 (84)6.8.2. 通过软件合成器播放MIDI音轨 (85)6.8.3. 将软件合成器音轨转换成音频 (85)6.9. 指南9——鼓映射 (87)SONAR 7 官方中文手册6.9.1. 创建一个新工程 (87)6.9.2. 创建鼓映射 (87)6.9.3. 创建一条鼓音轨 (87)6.9.4. 映射鼓音符到不同的输出端口上 (88)6.10. 指南10——Cyclone软件合成器 (91)6.10.1. Cyclone概述 (91)6.10.2. 添加文件到节奏垫 (91)6.10.3. 设置节奏垫的音量和相位 (92)6.10.4. 演奏Cyclone (92)6.10.5. 在循环编辑器里编辑循环 (93)7. 版权说明 (95)云天音乐网()版权所有 抄袭必究1.编者的话云天音乐网()是专门从事电脑音乐研究和教学的专业网站,自从2000年开办以来一直得到广大电脑音乐爱好者的喜爱。

墨西哥电子有限公司 FC-47 和 FC-48 转换器用户手册说明书

墨西哥电子有限公司 FC-47 和 FC-48 转换器用户手册说明书

Kramer Electronics, Ltd.USER MANUALModels:FC-47, HDMI to DVI/ Audio ConverterFC-48, DVI/ Audio to HDMI ConverterContentsContents1Introduction 1 2Getting Started 1 2.1Quick Start 23Overview 3 3.1FC-47 / FC-48 Input/Output Resolutions 4 4Your FC-47 HDMI to DVI/ Audio Converter 5 4.1Connecting the FC-47 HDMI to DVI/ Audio Converter 6 5Your FC-48 DVI/ Audio to HDMI Converter 7 5.1Connecting the FC-48 DVI/ Audio to HDMI Converter 8 6Technical Specifications 9 FiguresFigure 1: FC-47 HDMI to DVI/ Audio Converter 5 Figure 2: Connecting the FC-47 HDMI to DVI/ Audio Converter 6 Figure 3: FC-48 DVI/ Audio to HDMI Converter 7 Figure 4: Connecting the FC-48 DVI/ Audio to HDMI Converter 8TablesTable 1: FC-47 PC Input/Output Resolutions 4 Table 2: FC-47 HD Input/Output Resolutions 4 Table 3: FC-48 PC Input/Output Resolutions 4 Table 4: FC-48 HDTV Input/Output Resolutions 4 Table 5: FC-47 HDMI to DVI/ Audio Converter Features 5 Table 6: FC-48 DVI/ Audio to HDMI Converter Features 7 Table 7: Technical Specifications of the FC-47 HDMI to DVI/ Audio Converter 9 Table 8: Technical Specifications of the FC-48 DVI/ Audio to HDMI Converter 9Introduction1 IntroductionWelcome to Kramer Electronics (since 1981): a world of unique, creative and affordable solutions to the infinite range of problems that confront the video, audio and presentation professional on a daily basis. In recent years, we have redesigned and upgraded most of our line, making the best even better! Our 500-plus different models now appear in 8 Groups1, which are clearly defined by function. Congratulations on purchasing your Kramer TOOLS FC-47HDMI2 to DVI/ Audio Converter and/or Kramer TOOLS FC-47HDMI2 toDVI/ Audio Converter. The FC-47 and FC-48 are ideal for:Home theater, presentation and multimedia applicationsRental and stagingThe package includes the following items:FC-47 or FC-48Power adapter (12V DC Input)This user manual32 Getting StartedWe recommend that you:Unpack the equipment carefully and save the original box and packaging materials for possible future shipmentReview the contents of this user manualUse Kramer high performance high resolution cables4– No operator-serviceable parts inside unit.– Use only the Kramer Electronics input powerwall adapter that is provided with this unit1.– Disconnect power and unplug unit from wallbefore installing or removing device or servicing unit.1 GROUP 1: Distribution Amplifiers; GROUP 2: Video and Audio Switchers, Matrix Switchers and Controllers; GROUP 3: Video, Audio, VGA/XGA Processors; GROUP 4: Interfaces and Sync Processors; GROUP 5: Twisted Pair Interfaces; GROUP 6: Accessories and Rack Adapters; GROUP 7: Scan Converters and Scalers; and GROUP 8: Cables and Connectors2 High-Definition Multimedia Interface3 Download up-to-date Kramer user manuals from the Internet at this URL: 4 The complete list of Kramer cables is on our Web site at Getting Started2.1 Quick StartThis quick start chart summarizes the basic setup and operation steps.1 For example: model number AD2512C, part number 2535-0002513 OverviewHigh-Definition Multimedia Interface (HDMI) is an uncompressed all-digital1audio/video interface, widely supported in the entertainment and home cinema industry. It delivers the highest high-definition image and sound quality. Note that Kramer Electronics Limited is an HDMI Adopter2 and an HDCP Licensee3. In particular, HDMI:Provides a simple4 interface between any audio/video source, such as a set-top box, DVD player, or A/V receiver and video monitor, such as a digital flat LCD / plasma television (DTV), over a single lengthy5 cableSupports standard, enhanced, high-definition video, and multi-channel digital audio6 on a single cableTransmits all ATSC HDTV standards and supports 8-channel digital audio, with bandwidth to spare to accommodate future enhancements and requirements Benefits consumers by providing superior, uncompressed digital video quality via a single cable7, and user-friendly connectorIs backward-compatible with DVI (Digital Visual Interface)Supports two-way communication between the video source (such as a DVD player) and the digital television, enabling new functionality such asautomatic configuration and one-button playHDMI has the capacity to support existing high-definition video formats (720p, 1080i, and 1080p/60), as well as standard definition formats such as NTSC or PAL.Achieving the best performance means:Connecting only good quality connection cables, thus avoidinginterference, deterioration in signal quality due to poor matching, and elevated noise levels (often associated with low quality cables)Avoiding interference from neighboring electrical appliances that may adversely influence signal quality and positioning your FC-47 and/or FC-48 in a location free from moisture and away from excessive sunlight and dust1 Ensuring an all-digital rendering of video without the losses associated with analog interfaces and their unnecessary digital-to-analog conversions2 See /about/adopters_founders.asp3 See /list/4 With video and multi-channel audio combined into a single cable, the cost, complexity, and confusion of multiple cables currently used in A/V systems is reduced5 HDMI technology has been designed to use standard copper cable construction at up to 15m6 HDMI supports multiple audio formats, from standard stereo to multi-channel surround-sound. HDMI has the capacity to support Dolby 5.1 audio and high-resolution audio formats7 HDMI provides the quality and functionality of a digital interface while also supporting uncompressed video formats in a simple, cost-effective manner3.1 FC-47 / FC-48 Input/Output ResolutionsThis section describes the:FC-47 PC input/output resolutions, see Table 1FC-47 HD input/output resolutions, see Table 2FC-48 PC input/output resolutions, see Table 3FC-48 HDTV input/output resolutions, see Table 4Table 1: FC-47 PC Input/Output ResolutionsVGA1@60Hz VGA1@72Hz VGA1@75Hz VGA1@85Hz SVGA2@60Hz SVGA2@72Hz SVGA2@75Hz SVGA2@85Hz XGA3@60Hz XGA3@70Hz XGA3@75Hz XGA3@85Hz XGA3@87Hz SXGA4@60Hz SXGA4@75Hz SXGA4@85Hz UXGA5@60Hz 1152@70Hz 1152@75Hz 1152@85HzTable 2: FC-47 HD Input/Output Resolutions480i@60Hz 576i@50Hz 480P@60Hz 576P@50Hz 720P@60Hz 720P@50Hz 1080i@60Hz 1080i@50Hz 1080P@60Hz 1080P@50Hz 1080P@30Hz 1080P@25Hz 1080P@24HzTable 3: FC-48 PC Input/Output ResolutionsVGA1@60Hz VGA1@72Hz VGA1@75Hz VGA1@85Hz SVGA2@60Hz SVGA2@72Hz SVGA2@75Hz SVGA2@85Hz XGA3@60Hz XGA3@70Hz XGA3@75Hz XGA3@85Hz XGA3@87Hz SXGA4@60Hz SXGA4@75Hz SXGA4@85Hz UXGA5@60Hz 1152@70Hz 1152@75Hz 1152@85HzTable 4: FC-48 HDTV Input/Output Resolutions480P@60Hz 576P@50Hz 720P@50Hz 720P@60Hz 1080i@50Hz 1080i@60Hz 1080P@60Hz 1080P@50Hz 1080P@30Hz 1080P@25Hz 1080P@24Hz1 640x4802 800x6003 1024x7684 1280x10245 1600x12004 Your FC-47 HDMI to DVI/ Audio ConverterThe high quality FC-47HDMI to DVI/ Audio Converter accepts an HDMI input and converts the HDMI signal to a digital video DVI (DVI-D) output anda digital audio S/PDIF output. In particular, the FC-47:Lets you connect your HDMI source to a DVI HDCP display and enjoy high quality digital audio at the same time (note that when the HDMI input is HDCP encrypted the DVI output is encrypted as well)Features input format auto detection: digital RGB or YPbPrSupports an operation frequency of up to 1.65GbpsIs 12VDC fedIs HDCP compliantIs Plug and PlayFigure 1 and Table 5 define the FC-47HDMI to DVI/ Audio Converter:Figure 1: FC-47 HDMI to DVI/ Audio ConverterTable 5: FC-47 HDMI to DVI/ Audio Converter Features# Feature Function1 12V DC +12V DC connector for powering the unit2 DVI OUT Connector Connects to the DVI acceptor3 S/PDIF OUT RCA Connector Connects to the digital audio acceptor4 ON LED Illuminates when receiving power5 HDMI IN Connector Connects to the HDMI source4.1 Connecting the FC-47 HDMI to DVI/ Audio ConverterTo connect the FC-47, as the example in Figure 2 shows, do the following1:1. Connect the DVI OUT connector to the DVI acceptor (for example, aplasma display).2. Connect the S/PDIF RCA OUT connector to the digital audio acceptor(for example, an AV receiver).3. Connect the HDMI source (for example, an HDMI set top box) to theHDMI IN connector.4. Connect the 12V DC power adapter to the power socket and connect theadapter to the mains electricity.Note that only the digital signal (DVI-D) is available on the DVI connector.Figure 2: Connecting the FC-47 HDMI to DVI/ Audio Converter1 Switch OFF the power on each device before connecting it to your FC-47. After connecting your FC-47, switch on its power and then switch on the power on each device5 Your FC-48 DVI/ Audio to HDMI ConverterThe high quality FC-48DVI/ Audio to HDMI Converter accepts a DVI input and an S/PDIF input, and combines both these digital A/V signals into anHDMI output. In particular, the FC-48:Adds HDMI output capability to your DVI source so that, for example, an HDMI television can be used with your DVI source with soundSupports an operation frequency of up to 1.65Gbps per graphic channelFeatures input format auto detection: digital RGB or YPbPrIs 12VDC fedHDCP compliantIs Plug and PlayFigure 3 and Table 6 define the FC-48DVI/ Audio to HDMI Converter:Figure 3: FC-48 DVI/ Audio to HDMI ConverterTable 6: FC-48 DVI/ Audio to HDMI Converter Features# Feature Function1 12V DC +12V DC connector for powering the unit2 HDMI OUT Connector Connects to the HDMI acceptor3 ON LED Illuminates when receiving power4 S/PDIF IN RCA Connector Connects to the digital audio source5 DVI IN Connector Connects to the DVI source5.1 Connecting the FC-48 DVI/ Audio to HDMI ConverterTo connect the FC-48, as the example in Figure 4 shows, do the following1:1. Connect the HDMI OUT connector to the HDMI acceptor (for example,an LCD TV with built-in speakers).2. Connect the DVI source (for example, a multimedia player) to the:DVI IN connectorS/PDIF (digital audio) RCA IN connector3. Connect the 12V DC power adapter to the power socket and connect theadapter to the mains electricity.Figure 4: Connecting the FC-48 DVI/ Audio to HDMI Converter1 Switch OFF the power on each device before connecting it to your FC-48. After connecting your FC-48, switch on its power and then switch on the power on each deviceTechnical Specifications6 Technical Specifications 1Table 7 and Table 8 define the technical specifications:Table 7: Technical Specifications of the FC-47 HDMI to DVI/ Audio Converter INPUT:HDMI Connector OUTPUTS:1 DVI 2, 1.2Vpp on a DVI Molex 24pin female connector; DDC signal 5Vpp (TTL) 1 S/PDIF (digital audio) on an RCA connector OPERATION FREQUENCY:Supports up to 1.65Gbps COMPLIANCE WITH HDMI STANDARD:Supports HDMI 1.1, HDCP 31.0 INDICATOR LED:ON POWER SOURCE:12 VDC 180mA DIMENSIONS:12cm x 7.2cm x 2.4cm (4.73" x 2.83" 0.95", W, D, H) WEIGHT:0.3 kg. (0.67 lbs.) approx. ACCESSORIES:Power supply, bracket installation kit OPTIONS: Kramer cables Table 8: Technical Specifications of the FC-48 DVI/ Audio to HDMI Converter INPUTS:1 DVI 2, 1.2Vpp on a DVI Molex 24pin female connector; DDC signal 5Vpp (TTL) 1 S/PDIF (digital audio) on an RCA connector OUTPUT:HDMI Connector OPERATION FREQUENCY:Supports up to 1.65Gbps COMPLIANCE WITH HDMI STANDARD:Supports DVI 1.0, HDMI 1.1, and HDCP 3 1.0 INDICATOR LED:ON POWER SOURCE:12 VDC 190mA DIMENSIONS:12cm x 7.2cm x 2.4cm (4.73" x 2.83" 0.95", W, D, H) WEIGHT:0.3 kg. (0.67 lbs.) approx. ACCESSORIES:Power supply, bracket installation kit OPTIONS: Kramer cables1 Specifications are subject to change without notice2 On a DVI-I connector. Note that only the digital signal (DVI-D) is available on the DVI connector3 Compliant with HDCP 1.1 and downward compatible with HDCP 1.0LIMITED WARRANTYKramer Electronics (hereafter Kramer) warrants this product free from defects in material and workmanship under the following terms.HOW LONG IS THE WARRANTYLabor and parts are warranted for seven years from the date of the first customer purchase.WHO IS PROTECTED?Only the first purchase customer may enforce this warranty.WHAT IS COVERED AND WHAT IS NOT COVEREDExcept as below, this warranty covers all defects in material or workmanship in this product. The following are not covered by the warranty:1. Any product which is not distributed by Kramer, or which is not purchased from an authorized Kramer dealer. If you areuncertain as to whether a dealer is authorized, please contact Kramer at one of the agents listed in the web site .2. Any product, on which the serial number has been defaced, modified or removed.3. Damage, deterioration or malfunction resulting from:i) Accident, misuse, abuse, neglect, fire, water, lightning or other acts of natureii) Product modification, or failure to follow instructions supplied with the productiii) Repair or attempted repair by anyone not authorized by Krameriv) Any shipment of the product (claims must be presented to the carrier)v) Removal or installation of the productvi) Any other cause, which does not relate to a product defectvii) Cartons, equipment enclosures, cables or accessories used in conjunction with the productWHAT WE WILL PAY FOR AND WHAT WE WILL NOT PAY FORWe will pay labor and material expenses for covered items. We will not pay for the following:1. Removal or installations charges.2. Costs of initial technical adjustments (set-up), including adjustment of user controls or programming. These costs are theresponsibility of the Kramer dealer from whom the product was purchased.3. Shipping charges.HOW YOU CAN GET WARRANTY SERVICE1. To obtain service on you product, you must take or ship it prepaid to any authorized Kramer service center.2. Whenever warranty service is required, the original dated invoice (or a copy) must be presented as proof of warranty coverage,and should be included in any shipment of the product. Please also include in any mailing a contact name, company, address, anda description of the problem(s).3. For the name of the nearest Kramer authorized service center, consult your authorized dealer.LIMITATION OF IMPLIED WARRANTIESAll implied warranties, including warranties of merchantability and fitness for a particular purpose, are limited in duration to the length of this warranty.EXCLUSION OF DAMAGESThe liability of Kramer for any effective products is limited to the repair or replacement of the product at our option. Kramer shall not be liable for:1. Damage to other property caused by defects in this product, damages based upon inconvenience, loss of use of the product, lossof time, commercial loss; or:2. Any other damages, whether incidental, consequential or otherwise. Some countries may not allow limitations on how long animplied warranty lasts and/or do not allow the exclusion or limitation of incidental or consequential damages, so the above limitations and exclusions may not apply to you.This warranty gives you specific legal rights, and you may also have other rights, which vary from place to place. NOTE: All products returned to Kramer for service must have prior approval. This may be obtained from your dealer.This equipment has been tested to determine compliance with the requirements of:EN-50081: "Electromagnetic compatibility (EMC);generic emission standard.Part 1: Residential, commercial and light industry"EN-50082: "Electromagnetic compatibility (EMC) generic immunity standard.Part 1: Residential, commercial and light industry environment".CFR-47: FCC Rules and Regulations:Part 15: “Radio frequency devicesSubpart B – Unintentional radiators”CAUTION!Servicing the machines can only be done by an authorized Kramer technician. Any user who makes changes or modifications to the unit without the expressed approval of the manufacturer will void user authority to operate the equipment.Use the supplied DC power supply to feed power to the machine.Please use recommended interconnection cables to connect the machine to other components.10KRAMER: SIMPLE CREATIVE TECHNOLOGYKramer Electronics, Ltd. Web site: E-mail:*****************P/N: 2900-000238 REV 1 For the latest information on our products and a list of Kramer distributors, visit our Web site: , where updates to this user manual may be found. We welcome your questions, comments and feedback. CautionSafety Warning :Disconnect the unit from the power supply before opening/servicing.。

GOLDENWAVE GD-02 高性能解码耳放一体机使用说明书

GOLDENWAVE GD-02 高性能解码耳放一体机使用说明书

XLR-4 芯平衡耳机插孔
2. 后面板
RCA 前级信号输出 -L,-R
AES 数字信号输入
保险丝
RCA 线路信号输出 -L,-R
同轴数字信号输入
XLR 前级信号输出 -R,-L
光纤数字信号输入
AC 电源插座
XLR 线路信号输出 -R,-L
USB 信号输入 (B 型 ) 电源开关
6
连接 GD-02
1. 环境要求 (1) 请将设备放在一个平稳坚固的底面上。 (2) 确保设备环境通风良好,产生的热量可以及时散去。
(2) 通过 USB 接口连接 iPhone:需要一条 Lightning 至 USB 转换器 ( 选 购 )*。
使用随机附送的 USB 线缆,方形接口接入 GD-02,USB 接口接入转换器, 转换器 Lightning 接口接入 iPhone。
附送的 USB 线缆
Lightning 至 USB 转换器
17
PC 设置
(9) 在弹出的界面点击“高级”选项卡,在默认格式选择“24 位, 44100Hz( 录音室音质 )”或者“32 位,44100Hz( 录音室音质 )”,再点击确 定即可。
8
连接 GD-02
(4) 通过 AES、光纤以及同轴接口连接数字信号源: GD-02 配备了 AES、光纤以及同轴接口,通过对应类型的线缆,可以连 接不同类型的数字设备。例如:CD 机、数字播放器以及便携播放器等等。
CD 机
数字播放器
便携播放器
AES
同轴接口
光纤接口
9
连接 GD-02
3. 连接其他音频设备 可以将本机连接音源和其他音频设备之间,本机包含 2 种输出信号类型 ,
同时输出信号。 (1) 前级信号输出 (PREAMP OUTPUT),包含 1 组 XLR-3 平衡接口以及 1

HP Hewlett-Packard 说明书

HP Hewlett-Packard 说明书

入门指南Hewlett-Packard 产品和服务的所有保修限于这些产品与服务所附带的明确声明。

本文的任何条款都不应视作构成保修声明的附加条款。

HP不对本文的技术性错误、编印错误或冗长负任何责任。

对于在非HP 提供的设备上 HP 软件的使用和可靠性,HP 概不负责。

本文档包含的所有权信息均受版权保护。

未经 HP 事先书面许可,不得将本文档的任何部分影印、复制或翻译成其他语言。

Hewlett-Packard CompanyP.O. Box 4010Cupertino, CA 95015-4010USACopyright © 2000-2006 Hewlett-Packard Development Company, L.P.截至 2008 年 8 月 28 日之前,在美国可能获得美国专利号 4,930,158 与4,930,160 中一种或两种的许可。

Microsoft 和 Windows 是 Microsoft Corporation 在美国的注册商标。

HP 支持科技产品在法律允许范围内的使用,我们不认可、也不鼓励我们的产品被用于著作权法所不允许的目的。

本文档中的内容可随时更改,恕不另行通知。

目录安装电脑 (1)组装电脑 (1)将电脑放置到适当的位置 (1)使用电涌保护设备 (1)连接到电脑 (2)存放文档和复原光盘 (4)首次启动您的电脑 (4)设置和连接 Internet (5)配置和注册 Norton Internet Security 软件 (6)安全舒适地使用电脑 (7)注册软件更新 (7)在新电脑上设置帐户 (8)创建用户帐户 (8)创建密码 (9)安装软件和硬件设备的指导 (9)使用 HP 和 Compaq 产品 (10)将文件和设置从旧电脑转移到新电脑 (10)使用 HP Organize 或 Compaq Organize 软件 (10)使用键盘 (11)自定义键盘按钮 (13)使用电脑机箱顶部 (15)使用支撑架 (15)iii配置扬声器和声音选项 (19)步骤 1:连接扬声器 (19)音频接口类型 (19)扬声器配置 (22)扬声器类型 (23)连接 2.1(2个扬声器和一个低音炮)音频扬声器 (23)连接 4.1(4个扬声器和一个低音炮)音频扬声器 (24)连接 5.1(5个扬声器和一个低音炮)音频扬声器 (25)连接 7.1(7个扬声器和一个低音炮)音频扬声器 (27)将家用音频系统连接到电脑 (29)2 或 2.1 家用立体声系统的安装 (30)5.1(5 个扬声器和一个低音炮)家用音频系统的安装 (31)5.1(5 个扬声器和一个低音炮)家用音频系统的安装过程 (32)连接数字音频 (33)步骤 2:配置音频软件 (34)使用 Multi-channel Sound Manager 配置音频输出 (35)使用 Sound Effect Manager 配置音频输出 (37)使用 Realtek HD Sound Effect Manager 配置音频输出 (39)配置多音源音频 (41)步骤 3:为媒体软件程序配置声音 (43)选择录音设备 (44)解决关于声音的问题 (44)配置 Creative Sound Blaster X-Fi 声卡(仅适用于部分型号) (45)连接扬声器 (45)配置声卡软件 (46)配置 FlexiJack 接口 (46)使用声卡进行录音 (47)Sound Blaster X-Fi 配置模式 (47)详细信息 (48)使用读卡器 (49)使用读卡器 (50)媒体插入指南 (51)使用 HP Personal Media Drive (53)连接硬盘驱动器 (54)插入硬盘驱动器 (55)定位硬盘驱动器并为之分配一个盘符 (56)使用硬盘驱动器 (57)断开硬盘驱动器的连接 (58)iv入门指南处理数码图像 (59)使用 HP Photosmart Premier (60)播放 CD 和 DVD (63)播放音乐 CD (63)播放 DVD (63)使用国家/地区编码 (64)使用 Windows Media Player 播放 CD 和 DVD (64)播放视频 CD(VCD) (65)使用 Windows Media Player 播放视频 CD(VCD) (65)制作音频和数据光盘 (67)刻录前请擦除光盘上的内容 (68)制作音频 CD (68)验证音频文件刻录是否无误 (69)音频 CD 提示 (69)制作音频 CD (70)制作 jukebox 光盘 (70)制作数据 DVD 和 CD (71)验证数据光盘刻录是否无误 (71)数据光盘提示 (71)制作数据光盘 (72)复制 DVD 或 CD (73)将文件归档至 CD 或 DVD (73)处理映像文件 (74)制作映像文件 (74)从映像文件进行烧录 (74)使用 LightScribe 制作光盘标签 (75)Lightscribe 需求 (75)使用 Sonic Express Labeler 烧录 LightScribe 标签 (75)使用胶粘光盘标签 (76)兼容性信息 (76)光盘特性及兼容性图表 (77)光驱快速参考图表 (78)软件快速参考图表 (79)v制作视频光盘和影片 (81)开始捕获影片之前 (81)Sonic MyDVD Video 项目 (82)制作视频项目 (82)将文件添加到视频项目 (83)为视频项目捕获视频 (83)将幻灯片添加到视频项目 (84)将子菜单添加到视频项目 (84)编辑视频项目的样式 (85)编辑影像文件 (85)将视频项目刻录到光盘 (86)使用 Direct-to-Disc 向导制作视频项目 (87)视频质量和光盘尺寸 (88)DVD 刻录时间 (89)使用 muvee autoProducer 制作影像 (91)制作影像的基本步骤 (91)查找 muvee autoProducer (92)使用 muvee autoProducer (93)入门 (93)从数码视频摄像机截取影像 (94)加入影像 (95)加入图片 (97)加入音乐 (97)选择风格 (98)更改设置 (98)加入开场标题和结束署名 (99)制作影像 (100)预览影像 (100)修改影像 (101)保存影像项目 (102)将影像项目刻录到光碟 (103)获取帮助 (105)查找屏幕指南 (105)从网络上查找指南 (105)使用屏幕上的“帮助和支持中心” (106)使用 PC 帮助和工具 (106)使用 HP(或 Compaq 连接)更新信息 (106)获取消息 (107)关闭消息 (107)重新激活消息 (108)索引 (109)vi入门指南安装电脑警告:您所购买的电脑,已经根据其销往的国家/地区预先设好了电源。

杉纳特超级音乐人平板电脑操作手册说明书

杉纳特超级音乐人平板电脑操作手册说明书

1/13L6561June 20041FEATURES■VERY PRECISE ADJUSTABLE OUTPUT OVERVOLTAGE PROTECTION■MICRO POWER START-UP CURRENT (50µA TYP.)■VERY LOW OPERATING SUPPLY CURRENT(4mA TYP.)■INTERNAL START-UP TIMER■CURRENT SENSE FILTER ON CHIP ■DISABLE FUNCTION■1% PRECISION (@ T j = 25°C) INTERNAL REFERENCE VOLTAGE■TRANSITION MODE OPERATION■TOTEM POLE OUTPUT CURRENT: ±400mA ■DIP-8/SO-8 PACKAGES2DESCRIPTIONL6561 is the improved version of the L6560 stan-dard Power Factor Corrector. Fully compatible with the standard version, it has a superior perfor-mant multiplier making the device capable of work-ing in wide input voltage range applications (from 85V to 265V) with an excellent THD. Furthermore the start up current has been reduced at few tens of mA and a disable function has been implement-ed on the ZCD pin, guaranteeing lower current consumption in stand by mode.Realised in mixed BCD technology, the chip gives the following benefits:–micro power start up current–1% precision internal reference voltage –(Tj = 25°C)–Soft Output Over Voltage Protection–no need for external low pass filter on the cur-rent sense–very low operating quiescent current minimis-es power dissipationThe totem pole output stage is capable of driving a Power MOS or IGBT with source and sink cur-rents of ±400mA. The device is operating in tran-sition mode and it is optimised for Electronic Lamp Ballast application, AC-DC adaptors and SMPS.POWER FACTOR CORRECTORFigure 2. Block DiagramREV . 16Figure 1. PackagesTable 1. Order CodesPart NumberPackage L6561DIP-8L6561D SO-8L6561D013TRTape & ReelL65612/13Table 2. Absolute Maximum RatingsFigure 3. Pin Connection (Top view )Table 3. Thermal DataTable 4. Pin Description(1) Parameter guaranteed by design, not tested in production.Symbol Pin ParameterValue Unit I Vcc 8I q + I Z ; (I GD = 0)30mA I GD 7Output Totem Pole Peak Current (2µs)±700mA INV, COMP MULT1, 2, 3Analog Inputs & Outputs -0.3 to 7V CS 4Current Sense Input -0.3 to 7V ZCD 5Zero Current Detector50 (source)-10 (sink)mA mA P tot Power Dissipation @T amb= 50 °C (DIP-8)(SO-8)10.65W W T j Junction Temperature Operating Range -40 to 150°C T stgStorage Temperature-55 to 150°CSymbol ParameterSO 8MINIDIP Unit R th j-ambThermal Resistance Junction to ambient150100°C/W Function1INV Inverting input of the error amplifier. A resistive divider is connected between the output regulated voltage and this point, to provide voltage feedback.2COMP Output of error amplifier. A feedback compensation network is placed between this pin and the INV pin.3MULT Input of the multiplier stage. A resistive divider connects to this pin the rectified mains. A voltage signal, proportional to the rectified mains, appears on this pin.4CS Input to the comparator of the control loop. The current is sensed by a resistor and the resulting voltage is applied to this pin.5ZCD Zero current detection input. If it is connected to GND, the device is disabled.6GND Current return for driver and control circuits.7GD Gate driver output. A push pull output stage is able to drive the Power MOS with peak current of 400mA (source and sink).8V CCSupply voltage of driver and control circuits.3/13L6561Table 5. Electrical Characteristics(V CC = 14.5V; T amb = -25°C to 125°C;unless otherwise specified)Symbol Pin ParameterTest ConditionMin.Typ.Max.Unit SUPPLY VOLTAGE SECTIONV CC 8Operating Range after turn-on1118V V CC ON 8Turn-on Threshold 111213V V CC OFF 8Turn-off Threshold 8.79.510.3V Hys 8Hysteresis 2.2 2.5 2.8V SUPPLY CURRENT SECTIONI START-U8Start-up Current before turn-on (V CC =11V)205090µA I q 8Quiescent Current 2.64mA I CC 8Operating Supply Current C L = 1nF @ 70KHz4 5.5mA in OVP condition V pin1 = 2.7V 1.4 2.1mA Iq 8Quiescent CurrentV PIN5 ≤150mV , V CC > V CC off 1.4 2.1mA 8V PIN5 ≤ 150mV , V CC < V CC off 205090µA V Z 8Zener VoltageI CC = 25mA182022VERROR AMPLIFIER SECTIONV INV1Voltage Feedback Input Threshold T amb = 25°C 2.465 2.52.535V 12V < V CC < 18V 2.442.56V Line RegulationV CC = 12 to 18V25mV I INV 1Input Bias Current -0.1-1µA G V Voltage Gain Open loop6080dB GB Gain Bandwidth 1MHz I COMP 2Source Current V COMP = 4V , V INV = 2.4V -2-4-8mA Sink Current V COMP = 4V , V INV = 2.6V 2.54.5mA V COMP2Upper Clamp Voltage I SOURCE = 0.5mA 5.8V Lower Clamp VoltageI Sink = 0.5mA2.25VMULTIPLIER SECTION V MULT 3Linear Operating Voltage 0 to 30 to 3.5VOutput Max. SlopeV MULT = from 0V to 0.5VV COMP = Upper Clamp Voltage1.651.9K GainV MULT = 1V V COMP = 4V 0.450.60.751/V CURRENT SENSE COMPARATORV CS 4Current Sense ReferenceClampV MULT = 2.5VV COMP = Upper Clamp Voltage 1.61.7 1.8V I CS 4Input Bias Current V OS = 0-0.05-1µA t d (H-L)4Delay to Output 200450ns 4Current Sense Offset015mV ZERO CURRENT DETECTORV ZCD5Input Threshold Voltage Rising Edge (1) 2.1VHysteresis(1)0.30.50.7V V ZCD 5Upper Clamp Voltage I ZCD = 20µA 4.5 5.1 5.9V V ZCD5Upper Clamp VoltageI ZCD = 3mA4.75.26.1VV CS ∆V mult∆-----------------L65614/133OVER VOLTAGE PROTECTION OVPThe output voltage is expected to be kept by the operation of the PFC circuit close to its nominal value.This is set by the ratio of the two external resistors R1 and R2 (see fig. 5), taking into consideration that the non inverting input of the error amplifier is biased inside the L6561 at 2.5V.In steady state conditions, the current through R1 and R2 is:and, if the external compensation network is made only with a capacitor C comp , the current through C compequals zero.When the output voltage increases abruptly the current through R1 becomes:Since the current through R2 does not change, ∆I R1 must flow through the capacitor C comp and enter the error amplifier.This current is monitored inside the L6561 and when reaches about 37µA the output voltage of the multi-plier is forced to decrease, thus reducing the energy drawn from the mains. If the current exceeds 40µA,the OVP protection is triggered (Dynamic OVP), and the external power transistor is switched off until the current falls approximately below 10µA.However, if the overvoltage persists, an internal comparator (Static OVP) confirms the OVP condition keeping the external power switch turned off (see fig. 4).Finally, the overvoltage that triggers the OVP function is:∆V out = R 1 · 40µA.Typical values for R 1, R 2 and C are shown in the application circuits. The overvoltage can be set indepen-V ZCD 5Lower Clamp Voltage I ZCD = -3mA 0.30.651V I ZCD 5Sink Bias Current 1V ≤ V ZCD ≤ 4.5V2µA I ZCD 5Source Current Capability -3-10mA I ZCD 5Sink Current Capability 310mA V DIS 5Disable threshold150200250mV I ZCD 5Restart Current After Disable V ZCD < V dis ; V CC > V CCOFF -100-200-300µA OUTPUT SECTIONV GD7Dropout VoltageI GDsource = 200mA 1.22V I GDsource = 20mA 0.71V I GDsink = 200mA 1.5V I GDsink = 20mA0.3V t r 7Output Voltage Rise Time C L = 1nF 40100ns t f 7Output Voltage Fall Time C L = 1nF40100ns I GD off 7IGD Sink Current V CC =3.5V V GD = 1V510-mA OUTPUT OVERVOLTAGE SECTIONI OVP2OVP Triggering Current 354045µA Static OVP Threshold2.12.252.4VRESTART TIMER t STARTStart Timer70150400µsTable 5. Electrical Characteristics (continued)(V CC = 14.5V; T amb = -25°C to 125°C;unless otherwise specified)Symbol Pin ParameterTest ConditionMin.Typ.Max.Unit I R1sc V out 2.5–R1-------------------------I R2 2.5V R2------------===I R1V outsc V out 2.5–∆+R1----------------------------------------------------I R1sc I R1∆+==L6561 dently from the average output voltage. The precision in setting the overvoltage threshold is 7% of the ov-ervoltage value (for instance ∆V = 60V ± 4.2V).3.1Disable functionThe zero current detector (ZCD) pin can be used for device disabling as well. By grounding the ZCD volt-age the device is disabled reducing the supply current consumption at 1.4mA typical (@ 14.5V supply volt-age).Releasing the ZCD pin the internal start-up timer will restart the device.Figure 4.Figure 5. Overvoltage Protection Circuit5/13L6561Figure 6. Typical Application Circuit (80W, 110VAC)Figure 7. Typical Application Circuit (120W, 220VAC)Figure 8. Typical Application Circuit (80W, Wide-range Mains)6/137/13L6561Figure 9. Demo Board (EVAL6561-80) Electrical SchematicFigure 10. EVAL6561-80: PCB and Component Layout (Top view, real size 57x108mm)Table 6. EVAL6561-80: Evaluation Results.V in (Vac)Pin (W)V o (Vdc)∆Vo (Vdc)Po (W)η (%)w/o THD reducer with THD reducer PF THD (%)PF THD (%)8587.2400.11480.792.80.999 3.70.999 2.911085.2400.11480.794.70.996 5.00.996 3.213584.2400.11480.795.80.989 6.20.989 3.717583.5400.11480.796.60.9768.30.976 4.322083.1400.11480.797.10.94010.70.941 5.626582.9400.11480.797.30.89013.70.8938.1L65618/13Figure 11. OVP Current Threshold vs.TemperatureFigure 12. Undervoltage Lockout Thresholdvs. TemperatureFigure 13. Supply Current vs. SupplyVoltageFigure 14. Voltage Feedback Input Thresholdvs. TemperatureL6561Figure 15. Output Saturation Voltage vs. Sink CurrentFigure 16. Output Saturation Voltage vs.Source Current Figure 17. Multiplier CharacteristicsFamily9/13L6561Figure 18. DIP-8 Mechanical Data & Package Dimensions10/13L6561 Figure 19. SO-8 Mechanical Data & Package Dimensions11/13L6561Table 7. Revision HistoryDate Revision Description of Changes January 200415First IssueJune 200416Modified the Style-look in compliance with the “Corporate TechnicalPublications Design Guide”.Changed input of the power amplifier connected to Multiplier (Fig. 2). 12/13L6561 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequencesof use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are notauthorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.The ST logo is a registered trademark of STMicroelectronics.All other names are the property of their respective owners© 2004 STMicroelectronics - All rights reservedSTMicroelectronics GROUP OF COMPANIESAustralia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States13/13。

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虫版47耳放折腾贴虫虫小林版本47耳放DIY详细操作指南之前发了一个但是由于网络不好没能编辑完成如果管理员看到麻烦删除一下/read.php?tid=1141711虫版47耳放折腾说明虫虫小林版本47耳放DIY详细操作指南这篇文章已经在本人的个人主页无线电杂志以及个别论坛发表在大家谈发貌似有些晚不过还是希望更多人看到对大家DIY有一定的帮助大约在一年前,本人开发了一套耳机放大器。

其原型是比较著名的47耳放。

原版47耳放是由外国朋友设计的,由于电路中有很多以47为参数的元件所以取名为47耳放。

本人在原版47的基础上,对布线、参数、以及电路结构做了一定的优化并同时开发了耳机保护电路和稳压电源。

为了和大家分享已经公开了全部技术资料,详情请察看/read.php?tid=1107591或本人空间/ccxiaolin/blog/item/0e394ced143d8dc6b31cb18a.html。

自本人开发47耳放以来已经有一段时间了,由于结构简单、元件好配、设计合理、工作稳定等诸多优点得到了不少朋友的支持。

一部分朋友已经装出来了并向我反馈了装机心得,还有一些朋友装好后一直使用至今。

但当初设计47耳放的时候并非只想让它成为单一用途的47耳放,通过仔细观察发现此电路的兼容性很强,能够使用现有的47耳放PCB板并通过简单的修改轻易的改造成其他结构,而且品种很多,效果立竿见影!但是出板至今却很少见到有人发现这一强大动能,更别说完全发挥出47的能力来了,有的改造也仅仅是更换发烧零件等投入大且效果不明显的方案。

毕竟DIY在于折腾,通过自己的改造得到自己最满意、最适合的声音,并从中得到快乐才是DIY的意义所在。

所以今天发一篇文章详细的介绍47耳放应该如何折腾,希望能给大家带来帮助。

(由于本人昵称为:虫虫小林,所以下文中本人设计的47耳放简称为“虫版47”)PCB是电路的一种表现形式,而电路中元件的参数不会是唯一的。

为满足不同需要使用者在必要的时候会对参数进行调整以达到自己的要求,所以本人设计的PCB从来都是不标参数的,但是会标明元件符号并提供电路图。

这样就能看清楚元件在电路中的位置,改进或维修也会比较方便。

言归正传,首先看一下虫版47的原电路图。

为了方便大家看清结构,用一个基本电路结构表示两个声道的放大电路,元件符号为一个声道并用括号标注另一声道元件符号。

C05、C06两个超前补偿电容对电路结构影响不大,所以为看清结构直接删掉。

浮地电阻和电源部分也直接无视了,仅讨论放大部分。

看电路结构U1是基本的正相比例放大结构,U1输出端经过47欧电阻连接至电路输出端同时也把输出的电压信号直接输入给U2。

U2是电压跟随结构,功能类似缓冲器。

U2将U1输出的信号“复制”了一遍后同样也通过47欧电阻连接至输出。

这样U1、U2 形成并联结构但又并非完全同步,感觉U2好像是在U 1有动作之后才动作的,给人一种步调不一致的错觉。

而其实际上这两个运放只有少许的相位差而已。

这样做的特点是为了增加了运放的电流输出能力,同时也对整体电路的声音进行的修饰。

U1、U2分别是两个运算放大器,在设计PCB的时候采用双运放芯片。

其中一个芯片进行两声道的放大部分,另一个芯片进行两个声道放大后的电压跟随。

这样分工明确,两声道也相对对称。

更重要的是可以更换不同的运放而不用担心左右结构不对称。

接下来分别说明一下虫版47可以构成的电路结构、工作原理、修改方式以及方案扩展。

方案1标准版的虫版47耳放没什么好介绍的,之前的文章已经详细地介绍过了,直接上实物图。

左边为裸板,可以看清元件符号;右边已装好,可以看清元件内容。

互相对照,方便弄清符号对应元件。

此方案是最初开发虫版47的标准电路,没有什么特殊的地方。

大家直接按照电路图焊接即可。

运放使用飞利浦拆机的5532,成品电路可稳定工作。

适合推动大部分高阻耳机和一部分低阻高灵敏度耳机。

对于声音因每个人口味不同暂不作评价,大家可以自行测试。

方案2更换电容(新手专用,大侠请无视)这个方案说来比较蛋疼,操作作方式也十分简单。

换电容也是发烧友磨机必备的一项工作。

由于电容对音频信号影响比较大,所以更换电容相比那些更换电阻、线材、接线柱的做法来讲要理智的多,得到的改善也是相对比较明显的。

操作方法:找电容换上去就行了。

操作方法比较简单在此就不作说明也不上实物图对照了。

虫版47中有4个对信号有较大影响的电解可以换,分别是C01(C02)、C03(C04)。

更换时要根据整体电路注意参数的选择,参数过小很可能会影响低频。

具体参数选择参考方案3。

方案3更改放大器放大倍数耳放也是放大器的一类,既然是放大器那就一定会有一个稳定的放大倍数。

但是由于使用情况的不同,比如耳机阻抗及灵敏度不同,需要的放大倍数也不是唯一的。

标准版虫版47放大倍数为2.4倍左右,适合目前大部分高灵敏度耳机。

但是如果使用阻抗较高且灵敏度偏低的耳机,2.4倍就显得不够了,那么就需要通过修改参数来提高放大倍数了。

放大倍数主要是通过R03(R04)、R05(R06)两个电阻决定的,其倍数为R05(R06)的参数除以R03(R0 4)的参数的结果再加1。

根据公式可知若想增加放大倍数则可以通过增大R05(R06)或者缩小R03(R04)来实现。

相反要想缩小放大倍数缩小R05(R06)或者增大R03(R04)即可。

当然参数也不是可以胡乱修改的。

电路反馈结构为交流反馈,R03(R04)、C03(C04)两个元件的参数会影响反馈的截至频率。

如果想通过缩小R03(R04)来提高增益又不改变其截至频率的话,C03(C04)的参数也要以同样的比例增大。

若想通过增大R05(R06)来增加增益的话就没有那么麻烦了,直接增加参数即可。

不过这里要说明一下,有些极少数运放输入阻抗较低需要的反馈电流较大,增大R05(R06)会降低反馈深度甚至引起电路故障。

另外,运放反馈电阻的参数我习惯和运放输入对地的电阻保持一致,这样可以统一两个输入端的偏执使运放工作更稳定。

也就是说如果修改R05(R06),我会把R01(R02)也修改成相同的参数。

而C01(C02)与R01(R 02)构成输入端的滤波电路,增大R01(R02)会降低输入滤波的低频截至频率,虽然不会对声音有什么严重影响,但是在这里还是提一下比较好。

操作方法:更改R03(R04)、R05(R06)参数至放大倍数满足个人需要,必要时对C03(C04)参数做调整以便使电路正常工作。

方案扩展:方案3可以与方案2搭配使用。

具体操作参考前文。

方案4直流反馈与交流反馈47线路最早是老外设计的,现在的虫版47是本人在老外设计的电路的基础上进行修改所得的。

与老外的电路相比有几点明显改进。

首先增加了浮地电阻修改了参数,其次增大了两个退藕电容,最后更换了运放同时使用了交流反馈线路。

当然PCB布线方面也下了很大功夫。

然而为什么要改为交流反馈呢?因为这样可以让更多的运放在此电路下工作的更稳定。

原版47使用OPA2132这个失调电压较低的FET输入型运放,在直流反馈模式下输出中点不会有什么大问题。

但是如果使用NE5532这类失调电压较高的B JT输入型运放在直流反馈模式下问题就会比较大了,会有较高的直流输出,有时候甚至高达50MV!毕竟每个运放的指标都不会那么完美,但又不能因为指标上的不足放弃一种运放特有的音色,直接的解决办法就是把线路改为交流反馈。

于是虫版47变以交流反馈的结构出现了,同样使用5532的条件下,交流反馈结构可以把输出中点控制在1MV之内,相对于之前已经有了很明显的改善。

如果大家使用漂移较小输入阻抗较高的运放,或者不喜欢此类结构的话可把交流反馈改为直流反馈。

操作方法:直接把C03(C04)拆掉原来的位置用导线短路。

在电路图中用灰色表示删掉的部分,用红色表示新添加的部分。

方案扩展:此方案可以与方案2、方案3任意组合搭配使用。

具体操作参考前文。

另外可以在改为直流反馈的基础上短路伏地电阻修改电路参数为原版47结构。

方案5RA1结构RA1是歌德的一款经典耳放,其知名度非常高而且电路非常简单并且非常廉价。

看到内部机构的人都大呼坑爹。

RA1的本质就是一个4556运放为核心的最基本的比例放大电路。

要说“特色”也只能说前面两个电容比较有特色了,别的真的没有什么玄机,完全可以靠虫版47经过删减得到同样的结构。

修改电路结构后操作方法:拆掉C03(C04)、R07(R08)、R09(R10)、U2,短路C03(C04)、R07(R08),最后,运放用NJM4556D。

上一张实物图这样一来电路结构就和RA1一样了,但是参数还是有些差距的。

如果想继续向RA1靠拢可以把参数也一起改了。

操作方法:C01(C02)取5UF,R01(R02)取100K,R03(R04)取122K,R05(R06)取465K。

方案扩展:此方案可以与方案2、方案3任意搭配使用。

也可以参考方案4将C03(C04)装上变为交流反馈结构,便可适应更多运放并对声音润色。

具体操作参考前文。

方案6更换不同运放前面已经介绍过了,在PCB设计时考虑到U1、U2两部分可能使用不同运放所以把前后分别设计成两个IC。

这里介绍一下如何更换不同运放使用。

主要讲的内容并非简单的把运放拆下来再换上去,而是如何将两个参数不同的运放更合理的并联起来。

并联大都是为了提高电流输出能力,但是像运放、二极管三极管这类非线性元件是不能够直接并联的。

以运放为例,两个运放指标并不可能完全一致,输出电压若有微小差异都会使得电流从一个运放输出端流入另一个运放的输出端。

静态下会大大增加整体电路的功耗,负载情况下不但不能提升输出电流,还会使其中一个运放损耗另一个运放输出的电流。

所以通常放大器并联都会在输出端串联一个电阻匀流。

作用就是平衡两个运放的输出电流。

虫版47电路的两个运放就是分别串联47欧电阻后并联的。

第二个运放为电压跟随结构使得两个运放输出端电压基本一致。

两个运放输出端分别经过47欧电阻后汇合,两个47欧电阻上承担的电压也是基本一致的,这样两个47欧电阻上的电流,也就是两个运放输出的电流也会是基本一致的。

就算两个运放输出会有不同,在静态环境下也是一个运放的输出端经过94欧电阻缓缓流入另一个运放的输出端而不是直接流入(运放输出漂移大都是毫伏级别的,夹在94欧电阻两端通过的电流也是毫安级别甚至是微安级别的所以很安全),在动态环境下也能保证两个运放可以大致平分输出电流而不会互相抵消。

但有的时候并非需要两个运放输出电流保持一致。

前面说了由于两个运放功能不同可以更换不同的运放改善其声音,由于两个相同阻值的匀流电阻存在即使更换了不同的运放,前后两个运放输出的电流也基本是一样大的。

所以很多朋友在U2处使用了大电流的运放后声音还是显得有气无力。

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