BBE音效增强处理电路
新一代高解析力BBE音效增强处理器XR1075
新一代高解析力BBE音效增强处理器XR1075BBE 音效增强处理技术可修正和恢复音频系统由于各种原因而导致的信号损失和相位偏差，从而使声音真实地重现，使聆听者感觉高低音丰富，定位感、清晰度、明亮度接近理想的现场效果，这对于追求原汁原味真善美的音乐境界的发烧友来说，“BBE”是首选的法宝。
关于BBE 技术的原理，许多电子类杂志、报纸均有文章介绍，在此不作详细说明。
欲了解BBE 技术的详细原理可参阅98、99 年各种电子类杂志、报刊。
本文介绍美国EXAR 公司最新推出的高解析力BBE 芯片––––XR1075。
XR1075 是该公司在XR1071 的基础上，采用新的双极性技术，使其芯片的噪声系数更低、总谐波失真更小，而且芯片的体积更小（双列直插18脚封装），外围元件进一步简化，高低频延伸特别性更优，高频解析力（分辩率）增强调节范围和低频补偿调节范围均比XR1071 更宽，关于XR1071 的详细文章见《家庭电子》1999 年第9 期第3 8 页。
XR1075 的工作电压最低为6V，典型值为12V，工作电流15mA，高频解析力增强调节范围－0.5～＋13dB，低频补偿调节范围－0.5～＋13dB，高低频补偿调节范围分别通过改变4（16）、5（15）脚的输入电平而控制。
XR1075 的内部有两个声道相同的BBE 处理专利电路，每个声道的信号处理流程原理框图见图1。
XR1075 的各脚功能如下：3 脚和17 脚是左右声道信号输入端，9 脚和11 脚是左右声道信号输出端，10 脚是电源输入端，1 脚是电源地，18 脚是BBE 处理与直通选择开关控制端（接地时为BBE 处理），2 脚为参考电压输出端、用于输出给4（16）、5（15）脚进行高低频补偿的调节之用。
6（14）脚是低通滤波器端，7（13）脚是高通滤波器端。
图2 是笔者设计的XR1075 的完整应用电路图，可用于加装入音响中进行升级，也可找个小机壳。
购买好音质MP3 必须要了解的五大音效
购买好音质MP3 必须要了解的五大音效各位音质发烧友对BBE、SRS HD、FullSound、DNSe等音效肯定都不陌生，但也有部分朋友只是热衷于其中的某一个音效，或者只喜欢某个品牌产品的音质，而对其他的了解并不多。
而实际上，当前产品音质值得肯定的几大厂商，都基本拥有了自己的固定或者说常用音效，譬如三星的DNSe数字自然音效、飞利浦的FullSound飞声音效等等，今天就一起来看看这各具特色的五大音效。
SRS WOW HDSRS是Sound Retrieval System的缩写，意思就是把被压缩过的音乐文件，恢复成原音的水准。
SRS WOW是大家颇为熟悉的一种音效技术，由SRS Labs公司针对MP3等新一代的音频格式而开发的一种音质增强技术，SRS WOW HD音效技术是WOW技术的升级版本，这项技术可以让用户根据自己的需要和环境调整音响效果。
该音效常见于使用Sigmatel芯片的产品，例如iriver E30、iriver E200以及国内的OPPO D37H、歌美M33等等。
图为：iriver E200图为：iriver E200音效SRS WOW HD音效包含的设置:1.Trubass：改善低音和超低音音频，使之产生大容量扬声器的声音效果。
2.SRS宽度：扩展来自扬声器的声场的宽度。
3.SRS中置：将声音混合到左右声道。
4.音场焦点：提高感知的声场高度。
5.低音：增强音频中的低音电平。
6.清晰度：调整音频信号的清晰度。
7.限幅器：去除刺耳、爆破声。
SRS WOW由SRS 3D、WOW、TruBass、FOCUS组成，SRS WOW HD又新增了High Definition、CENTER、Limiter等技术，使得背景音效更加强；借助于High Definition人声清晰度更高，低音效果更强劲有力；调节Center，感知声源位置远近，使声音更富立体感。
BBE音效韩国厂商iAUDIO是将BBE音效运用的炉火纯青的一个典型代表，旗下的MP3产品音质备受好评，不时被冠以“音质神器”的美誉，仅在09年就推出了iAUDIO E2、iAUDIO 9两款定位不同的出色高音质作品。
人声增强电路
设计音响电路当然是电子工程师的事，不过如果电子工程师不学一点声学知识的话，设计出来的东西就只能叫作机器而不是音响。
虽然大多数音响器材厂家常常吹嘘他们对音乐的理解是多么的深刻，但你大可不必太当真。
下面介绍的卡拉ＯＫ人声增效电路，是笔者小小的得意之作。
当年笔者曾经在一家知名的音响器材厂家做设计，在一款入门级的卡拉ＯＫ功放机设计中，笔者将这个电路接在了话筒放大电路后面，结果这款机的卡拉ＯＫ演唱效果超过了同厂的高档机，令哪些资深的工程师和老板都感到惊讶，其中的奥秘在当时可是不传之密哦。
电路很简单，两个结构相同的滤波器，一个将150Hz处的频率提升，使人声变得丰满，中气十足，一个将2400Hz处的频率提升,使人声变得明亮，齿音也得到了很好的表现。
效果的提升是基于声学知识中声波的音感分析原理，电路则是实现的手段。
下边的是本电路的频率响应图。
频率响应
频率响应图。
图解JetEffect5.0BBE+音效系统【究极调教】
图解JetEffect5.0BBE+⾳效系统【究极调教】本帖最后由 fullsound 于 2013.2.18 18:37 编辑第五章；JetEffect 5.0之44种预设⾳效下⾯就向⼤家逐⼀介绍下：【优点；调节⽅便、⼀指搞定、声⾳⾛中庸路线】JetEffect 5.0之Normal(正常)Normal⾳效是⼀个纯的电路型⾳频效果，主控制器将⾳频信号处理完成以后，通过⾳频放⼤芯⽚直接输出声⾳。
此EQ中的各个频段位置全部是零，在BBE及其他类型⾳效全部关闭的状态下，Normal⾳效可以通过相应的⾳频输出设备直接输出到各类⾳响上，然后再利⽤⾳频输出设备上的⾳频调整系统进⾏设置。
所谓的调整设置包括两⽅⾯，⼀个是针对⾳频输出设备⾃⾝的状态调整，另⼀个是对附加在⾳频设备上的⾳效系统进⾏调整。
JetEffect 5.0之BBE（⾳效基本算法）在Normal⾳效的基础上，将BBE+⾳效中的BBE选项打开，BBE⾳效共有10级调整，这种⾳效是⼀种纠正相位失真的⼀种⾳效。
简单的说，⾳频信号在经过诸多电路单元到达输出设备上的过程中，⾼频信号往往较晚传达⾄听众的⽿朵⾥，信号频率越⾼，滞后的时间也就越⼤，因此对⾳乐清晰度的听感会产⽣⼀定影响。
BBE就是纠正这种相位差的⼀种⾳效，它会针对信号的频率状态，将原来滞后的⾳频信号拉到原始位置上，使原有的声⾳效果更加接近于初始状态。
所以经过BBE处理的⾳频信号，会⽐没有经过BBE⾳效处理的⾳频信号更加清晰。
JetEffect 5.0之BBE VIVA、BBE VIVA2 （BBE的3D效果）BBE VIVA是在BBE纠正了相位失真基础上，对于声位准确度调整的⼀种⾳效。
简单讲，这种⾳效增加了⾳频本⾝的宽度，深度和⾼度。
对于⽿机⽤户来说，在使⽤⽿机收听⾳乐的时候，很多时候都会感到声⾳的发出点更多的来⾃靠近⽿朵的部分，这样在听⾳乐的时候，会丢失很多的⽴体感和现场感（当然现场感还有其他的影响因素，这⾥只强调声位的影响）。
比较全面的音效概述--均衡器EQ的解释
比较全面的音效概述--均衡器EQ的解释（发现还是有很多人不懂）音效概述音效是指为增进一场面之真实感、气氛或戏剧讯息，而加于声带上的杂音或声音。
简单地说，音效就是指由声音所制造的效果。
所谓的声音则包括了乐音、及效果音。
数字音效数字音效简称EQ模式，即MP3不同的声音播放效果，不同的EQ模式带给听使用者不同的声音播放效果，同时EQ模式也是最能突出个人个性的地方，给使用者带来更多的音乐享受。
目前的MP3的数字音效模式一般为六种，分加是CLASSIC（古典音乐模式）、POP（流行音乐模式）、JAZZ（爵士乐模式）、ROCK（摇滚乐模式）、NOMAL（普通模式）和AUTO（自动改变模式）。
当然在选购MP3时并不代有数字音效模式越多越好，做到实用为最好。
环境音效主要是指通过数字音效处理器对声音进行处理，使声音听起来带有不同的空间特性，比如大厅、歌剧院、影院、溶洞、体育场等。
环境音效主要是通过对声音进行环境过滤、环境移位、环境反射、环境过渡等处理，使听音者感到仿佛置身于不同环境中。
这种音效处理在计算机声卡上应用非常普遍，现在在组合音响方面应用也逐渐多起来。
环境音效也有其缺点，由于对声音处理时难免会损失部分声音信息，并且现在能模拟出的效果和真实环境还有一定差距，因此有人会感到声音比较“虚假”。
MP3音效:普通音效如何使用均衡器来获得更好的声音表现，是每一个 MP3 爱好者的必修课。
不同的 MP3 的均衡器设置也不尽相同，如 IRIVER 和 IAUDIO 的均衡器虽然都是分为五级，但频段划分和调节级别也各不相同， iRiver 的 XtremeEQ 分为五段： 50Hz 档， 200Hz 档， 1KHz 档， 3KHz 档， 14KHz 档，每段有 10 级调节： -15dB ， -12 dB ， -9 dB ，-6 dB ， -3 dB ， 0 dB ， +3 dB ， +6 dB ， +9 dB ， +12 dB ， +15 dB 。
几种高品质音调电路
几种高品质音调电路功放系统中无论是低档还是高档机，除了音量控制外都有音调控制电路，在一些低档机厂家为节省成本，其音调部分仅采用阻容式，当音调调节时往往使得高低音相互干扰，而且缺乏力度和清晰感，听起来非常浑浊杂乱，听久了令人烦燥不安，这些机子弃之又觉浪费，但用之又不满意，如果有动手能力的话，很有必要花几十元对其动动手术（摩机）–––––制作一款高品质的音调板来替换原机音调部分。
下面就向广大发烧友介绍几款品质极佳的音调电路供爱好者选择。
其中以 LM4610N、LM1036N最佳，LM4610N是在LM1036N的基础上增加了3D音场效果处理功能的新一代发烧精品，笔者建议首选LM4610N。
图1是由2块NE5532N组成的高中低音音调及音量控制电路（图中仅画一声道，另一声道完全一样），原理为：信号经IC1（作缓冲放大及隔离作用，避免负载与信号源之间的影响）进入由电阻电容组成的三个频率均衡网络，即高音、中音、低音的频率，当调节RP1–––RP3相应的低中高频就会相应地进入由IC2及其反馈电路组成的反相放大器电路，调节RP1–––RP3就是提升或衰减了高中低音，从而实现了音频调节作用。
需要说明一点是所采用的NE5532N必须是正宗品，如美国大S的、飞利浦的，这样才使行本电路的信噪比、动态范围、瞬态响应和控制效果均达到相当高水准。
（欲获更高的水准NE5532N 可换为NE5535N、OP275、AD827JN等精品运放，当然价格就高一点了）。
图2是采用二阶RC有源二分频电路，该电路由2块NE5532N构成（图中仅画一声道，另一声道相同），图中IC1A与IC1B分别组成低通与高通滤波器，完成音频信号的分割，再分别送到高低音音量控制电位器再分别进入高低音功放电路去推动高音喇叭和低音喇叭。
利用该电路的缺点是要多增加一对功板电路及增多一组接线柱。
相对来说需要多花点钱，但采用前级分频的优点却是非常明显的：①改善了低音音质；②兼顾了高低音扬声器的发声效率；③解决了以住电路中高低音扬声器联接时存在的阻抗不匹配问题；④音调调节的动态范围明显变大。
高解析力BBE电路XR1075成品板介绍
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BBE 362XL 双通道信号处理器用户指南与参考手册说明书
User Guideand Reference Manual 362XLSONIC MAXIMIZERiTABLE OF CONTENTSImportant Safeguards (i)BBE Process Explained (1)Product Description (2)Applications (2)Controls and Connections (3)Specifications (4)General Operation (4)Service /Warranty / Maintenance (5)Application Diagrams........................................................................................................................6-10 Calibration Procedures (11)Schematic Diagrams…………………………………………………………………………………………………………12-13Congratulations on your purchase of the BBE 362XL Sonic Maximize r—a two channe l signal processor that will benefit any recording or sound reproduction system. You now own a very unique signal processing device with no equal in the audio world. Whether you purchased the BBE 362XL for your home studio, P.A., DJ system, or instrument rack, you will find the 362XL's rugged construction and careful electronic design a welcome addition to your sonic arsenal.Thank you for your purchase, and for the trust that you've place d in BBE. We are committe d to bringing you the finest products, with useful and unique features to serve your audio needs.The BBE Process—"What it Is"Loudspeakers have difficulty working with the electronic signals supplied by an amplifier. These difficulties cause such major phase and amplitude distortion that the sound reproduced by speaker differs significantly from the sound produced by the original source.In the past, these problems proved unsolvable and were thus delegated to a position of secondary importance in audio system design. However, phase and amplitude integrity is essential to accurate sound reproduction. Research shows that the information which the listener translates into the recognizable characteristics of a live performance are intimately tied into complex time and amplitude relationships between the fundamental and harmonic componentsof a given musical note or sound. These relationships define a sound's “sound”.When these complex relationships pass through a speaker, the proper order is lost. The higher frequencies are delayed.A lower frequency may reach the listener's ear first or perhaps simultaneously with that of a higher frequency. In some cases, the fundamental components may be so time-shifted that they reach the listener's ear ahead of some or all of the harmonic components.This change in the phase and amplitude relationship on the harmonic and fundamental frequencies is technically called “envelope distortion.” The listener perceives this loss of sound integrity in the reproduced sound as "muddy" and “smeared.” In the extreme, it can become difficult to tell the difference between musical instruments, for example,an oboe and a clarinet.BBE Sound, Inc. conducted extensive studies of numerous speaker systems over a ten year period. With this knowledge,it became possible to identify the characteristics of an ideal speaker and to distill the corrections necessary to return the fundamental and harmonic frequency structures to their correct order. While there are differences among various speaker designs in the magnitude of their correction, the overall pattern of correction needed is remarkably consistent.The BBE Process is so unique that 42 patents have been awarded by the U.S. Patent Office.1Product DescriptionThe BBE 362XL is a ganged stereo, single rack space device for use in +4dBu balanced line level applications. A single function button switches the BBE process on or off in both channels, which is useful for comparing the processed sound to the unprocessed sound. An LED next to the function button glows green when the BBE process is on and red when the process is off. The Lo Contour control is for adjusting the level of phase corrected low frequencies in the program material. The Process control is for adjusting the level of phase corrected high frequencies in the program material. The output is monitored by a clipping circuit which turns on a red LED when the output level is at 6dB below true clipping.Things to RememberThe BBE 362XL is designed to work with +4dBu line levels. This is suitable for professional mixers, P.A. consoles, recording studios, and nightclub sound systems. The BBE 362XL drives load impedances down to 600 Ohms and supplies a maximum output level of +16dBu. Plugging a guitar or other high impedance device directly into the BBE 362XL will not work properly as its input impedance is less than 50K ohms.Set-UpThe BBE 362XL is connected into the chain in series with the signal path the same way a graphic equalizer or limiter would be connected. The output of a mixer, pre-amp, or other sound source feeds the input of the BBE 362XL. Setting up the BBE 362XL as an echo send device like a digital reverb is not recommended as the processed effect is not fully realized when summed with the original source audio.APPLICATIONSMusic and P.A. SystemsThe BBE 362XL is a welcome addition to any live sound P.A. system because the BBE circuit dramatically improves the clarity and intelligibility of vocals and musical instruments. Night club and mobile DJ systems will also benefit greatly from the BBE Process, with more depth, detail and punch over the entire mix. The 362XL can be hooked up to any P.A. or DJ sound system exactly like an equalizer would. When using in conjunction with an equalizer, the 362XL should be added after the equalizer in the signal chain. In the event that the equalizer is being used for drastic tone alteration, then insert the 362XL before the equalizer in the signal chain. Placement either before or after an equalizer should have no negative effect on the 362XL unit or its processing ability, however most users find they prefer more modest use of their equalizers once the BBE 362XL has been added to their sound systems.Instrument RacksThe BBE 362XL will deliver surprisingly good results in guitar, bass and keyboard rack systems. Electric guitars have added “bite”, “chunk” and improved definition. As Guitar Player magazine said, “BBE is the most cost effective improvement you can add to your rig”. Acoustic guitars processed with the 362XL have a breathtakingly natural sparkle and presence. Bassists will delight in the BBE 362XL's ability to bring much more punch to the bottom end without muddying up the midrange. The 362XL is also great for keyboard rigs, with everything from the latest samples to a vintage Rhodes benefiting equally from the patented BBE process.Recording SystemsThe BBE 362XL can be used as an effect on individual tracks or applied overall during mixdown. The BBE process works very well to liven up the final mix, which is why the BBE 362XL and 882 models are popular for use in both recreational and professional recording studios.21.CLIP LED:Will illuminate at +14dBu, giving a 6dBu warning of the impending distortion at +16dBu, the actual clip point.2. LO CONTOUR: Regulates the amount of phase corrected bass frequencies.3. PROCESS:Regulates the amount of phase corrected treble frequencies.4. BBE FUNCTION: This push button switch allows for quick comparison of processed with unprocessed sound.When the switch is pushed in, the process is on and the indicator LED is green. When the switch is out, the process is off and the indicator LED is red.5. POWER: This switch controls primary power to the BBE 362XL.REAR PANEL CONNECTIONS1. AC POWER CORD: Plugs into AC power receptacle. U.S. Model, 100-120Vac, 50/60Hz.All other models, 200-240 Vac, 50/60Hz.2. FUSE:Turn cap on fuse holder counter-clockwise to remove fuse. (Note: For U.S. Model, replace with250Vac, 1/2A Fastblow type fuse. For all other models, replace with 250Vac, .125A Fastblow type fuse.)3. OUTPUT: The output of the BBE 362XL can be taken from the 1/4” stereo TRS Phone Jack or the XLR Jack . Both are balanced and the same point electronically. This allows both outputs to be used simultaneously, eliminating the need for a “Y” cord in the event multiple, balanced outputs are required. The recommended single load impedance is at least 10k Ohms. If both outputs are being used, a minimum of a 22k Ohm load per device is required. (The “load” is determined by the input impedance of the next subsequent component in the signal chain.) The maximum output is rated at +26dBu. Pin #2 is considered the hot or “+” signal. The output impedance of the BBE 362XL is 600 ohms. NOTE: Actual output level will vary due to the selected position of the BBE Process, and the actual input signal level. If both the XLR and Phone Jacks are being used, both must be either balanced or unbalanced. Otherwise a loss of signal level will occur.4.INPUT: The input of the BBE 362XL is a balanced connection. Although is can be either a TRS 1/4” stereo Phone Plug or an XLR Plug, it is recommended that only one input source be used. Both jacks are the same point electronically, however, due to the input/output impedance characteristics of most audio devices, a loss of signal may occur and/or damage to a component if both inputs are utilized. Pin #2 is considered the hot or “+” signal. The input impedance of th BBE 362XL is 10k Ohms. The maximum signal level is +26dBu.3FRONT PANEL CONTROLS 112233445SpecificationsFrequency Response,process mode:……………………………Program controlledbypass mode:……………………………5Hz to 30kHzSignal to noise ratio (balanced):……………114dB Process in, 126dB Process outTHD:………………………………………………less than 0.1% at -10dBu input, Process in/outMaximum Input:…………………………………+18dBu (may vary due to control settings)Input Impedance:………………………………10k OhmsNominal Input Level:…………………………-10dBu ∼ +4dBuOutput Impedance:……………………………600 OhmsNominal Output Level:…………………………-10dBu ∼ +4dBuMaximum Output Level:………………………+20dBu unbalanced, +26dBu balanced* 0dBu = 0.775mVrmsTerminations/Connections (Rear Panel):…XLR/1/4” TRS Phone JacksPower Requirements:……………………………U.S.model: 100-120VAC, 50/60Hz, 10 WATTSAll other models: 200-240VAC, 50/60Hz, 10 WATTS Fuse:………………………………………………Replace with the same type FASTBLOW fuseU.S. model: 250Vac, 1 /2A Fast blow type fuse.All other models: 250Vac, .125A Fastblow type fuse Dimensions: …………………………………......Standard 1U single rack space, 19"(W) x 5.75"(D) x 1.7"(H) Shipping Weight:………………………………4.5 lbs. (2.5kgs)Note: Due to continuing product improvement, specifications and design are subject to change without notice. General OperationTHE BBE 362XL IS A LINE LEVEL SIGNAL PROCESSOR AND IS TO BE CONNECTED PRIOR TO THE POWER AMP IN ANY AUDIO SYSTEM. SIGNIFICANT DAMAGE MAY BE INFLICTED TO THE BBE 362XL OR ANY SUBSEQUENT COMPONENT IN THE SYSTEM IN THE EVENT THE OUTPUT OF A POWER AMP IS CONNECTED DIRECTLY TO THE INPUT OF THE BBE 362XL.In order to reduce the risk of damage to any equipment, properly connect all cables and power cables before turning on any components in the system. Most important of all, ALWAYS TURN ON THE POWER AMPLIFIER LAST TO AVOID DAMAGING THE SPEAKERS OR THE AMP.The BBE 362XL may be utilized in a number of different environments and its results may vary accordingly.Because both channels are completely independent from each other, only one channel of the BBE 362XL may be used, or each channel processing a different signal source. The effects loop is the ideal placement in the signal chain of a guitar application. In a pre-amp, keyboard or P.A. application, the BBE 362XL works best as the last component in the signal chain, just before the crossover or power amp. Important: In a P.A. application, never connect the BBE 362XL into the effects loop. The inherent phase shift of the BBE Process will cause phase cancellation resulting in a partial loss of signal.BBE and EqualizationThe most common question asked of the BBE Sound, Inc. service department is: “Where does the BBE Processor connect in the signal chain, before or after the equalizer?” Many people find that the same amount of equalization is no longer needed, if at all, when a BBE processor is used. Additionally, the amount of equalization used will help determine the BBE 362XL’s proper location in the signal chain: If the EQ is being set to give the room a flat response as determined by a spectrum analyzer, the BBE 362XL will work properly before or after the EQ. (Placing the BBE 362XL after the EQ is recommended.) If the EQ is being used for drastic tone alteration, the recommended placement would be before the EQ. Neither of these configurations will harm the BBE 362XL.4Service We recommend that if at all possible, a BBE 362XL which requires service be sent to our facility in Huntington Beach, California. We request that a “RETURN AUTHORIZATION” be issued by the dealer from whom you purchased the unit.If this is not possible, call BBE Sound, Inc. directly at (714) 897-6766, extension 116 to obtain a “RETURN AUTHORIZATION”. Include a copy of the bill of sale with the unit when it is shipped to BBE Sound, Inc. so that the service can be expedited.As the repair turnaround time is minimal, we request that the unit be sent to BBE Sound, Inc. We also need to add reliability data to our files so that future revision may be undertaken, if necessary, to improve the product. If unit has been purchased outside the US, please contact your national distributor.Warranty Warranty registration of the unit to BBE Sound, Inc. is not necessary. It is strongly recommended that you retain a copyof the bill of sale for future reference.IT IS THE SOLE RESPONSIBILITY OF THE END USER TO PROVIDE THE BILL OF SALE OR OTHER MEANS OF PROOF OF PURCHASE TO VALIDATE THE WARRANTY IF WARRANTY SERVICE IS REQUESTED.The BBE 362XL is warranted against defects in material and workmanship for a period of five (5) years from date of purchase from BBE Sound Inc. or from an authorized dealer. During this period, we will repair units free of charge providing that they are shipped prepaid to BBE Sound, Inc., 5381 Production Drive, Huntington Beach, CA 92649. We will pay return UPS shipping charges within the USA. All charges related to non-UPS shipping, including customs clearance, will be billed. The warranty will be honored for the longer of either 90 days from the date of any service or the remainder of the original 5 Year factory warranty.This warranty will be consider null and void by BBE Sound, Inc. if any of the following is found:1. The equipment has been physically damaged.2. The equipment shows signs of abuse.3. The equipment has been electrically damaged by improper connection or attempted repairby the customer or a third party.4. The equipment has been modified without authorization.5. The bill of sales indicates that the purchase date of the equipment is not within the warranty period.All non-warranty repairs are warranted for a period of 90 days from the date of service.BBE Sound, Inc. is NOT LIABLE FOR CONSEQUENTIAL DAMAGES. Should the unit fail to operate for any reason, our sole obligation is to repair it as described above. DO NOT RETURN ANY P RODUCT TO THE ABOVE ADDRESS WITHOUT INSTRUCTIONS AND AUTHORIZATION ISSUED BY THE ABOVE LOCATION.Maintenance Maintenance of the BBE 362XL is limited to proper cleaning of the unit with mild household cleaner such as Formula 409™ or Windex™. The chassis and cover are steel finished with a durable polyurethane paint, while the front panelis an anodized aluminum extrusion.There are no user replaceable parts and the unit should not be opened for any reason unless you are a qualified technician. Calibration should be performed if parts are replaced or if a performance check-out indicates a problem with calibration. Long term use has shown that over the life of this unit there is little or no drift of the componentsin the BBE 362XL which would cause a change in calibration. A very conservative design philosophy has resulted in a piece of equipment which runs very cool and should give years of trouble-free service.5LIVE APPLICATION: POWERED MIXER6There are a couple of ways to configure the BBE 362XL into a powered mixer. The ideal method would be into “Pre-Amp Out/Power Amp In” section of the console. If your console does nothave this option, use the main or channel insert points.LIVE APPLICATION: NON-POWERED MIXER7Connect the BBE 362XL to the output of the mixing console. The output of the BBE will drive either a crossover or a power amplifier directly.RECORDINGThe BBE 362XL can be utilized in the recording studio on individual instruments of on groups on instruments to improve the sound quality.MASTERING OR DUBBINGUse the BBE 362XL for mastering the recording. Even if the BBE Process has been used on individual tracks, an improvement on the total mix will be noticed.89INDIVIDUAL INSTRUMENTSUse the BBE 362XL in the effects loop or the main output of a guitar preamp. For keyboards, theoutput of the sub-mixer will be the ideal location.SOUND CONTRACTORSThe BBE 362XL will accept the output level of most sound contractor type mixers.DJ APPLICATIONConnect the BBE 362XL into the processor loop of a pre-amplifier/mixer and hear the music come alive! 10Calibration Procedure for the BBE 362XL (REV/S/ON 1.1)NOTE: THIS UNIT W AS TESTED AND CALIBRATED AT THE FACTORY.THIS PROCEDURE IS FOR QUALIFIED PERSONNEL ONLY.INITIAL SETTINGS:1. BBE Process control VR2 and Lo Contour control VR1, threshold control VR3, and release control VR4 to minimum(fully C.C.W.).2. Power switch on and BBE function switch in, (BBE on position). Note: Since both channels are identical in calibration, only channel A will be outlined. Channel B will be in brackets [ ]. The signal will be input into the corresponding channel connector marked as 1 /4” phone jack TRS. The output will be monitored at the corresponding channel marked as 1/4”phone jack TRS.POWER SUPPLY TEST:1. With your DVM set to D.C. volts, measure the positive end of C35. You should read less than +26vdc2. With your DVM set to D.C. volts, measure the negative end of C39. You should read less than -26vdc.3. Measure the D.C. voltage on Jmp27. Reading should be +12vdc, (+/-0.8vdc).4. Measure the D.C. voltage on Jmp22. Reading should be -12vdc, (+/-0.8vdc).BBE PROCESS TEST:1. Input a 5khz signal ~ -lOdBu into channel A [B] input.2. Measure the channel A [B] output with a DVM set to A.C. volts.3 With the Process control at minimum, (fully C.C.W.), DVM should read -10.5dBu, (+/-0.5dBu).4. With the Process control at maximum, (fully C.W.), DVM should read -1.5dBu, (+/-0.5dBu).LO CONTOUR TEST:1. Input a 50hz signal ~ -l0dBu into channel A [B] input.2. Measure the channel A [B] output with a DVM set to A.C. volts.3. With the Lo Contour control at minimum, (fully C.C.W.), DVM should read -9.5dBu, (+/-0.5dBu).4. With the Lo Contour control at maximum, (fully C.W.), DVM should read -1.5dBu, (+/-0.5dBu).BYPASS TEST: (NOTE: Lo Contour and Process controls at maximum)1. Input a 500hz signal ~ -l0dBu into channel A [B] input.2. Measure the channel A [B] output with a DVM set to A.C. volts.3. With the Process in, the DVM should read -12dBu (+/-0.5dBu) and the process LED should illuminate green4. With the Process out, the DVM should read -10.5dBu (+/-0.5dBu) and the process LED should illuminate red.CLIP INDICATOR TEST:1. Input a 500hz signal ~ +19dBu into the channel A [B] input.2. Verify that the clip LED is on.3. Change signal level to +16dBu and verify that the clip LED turns off.Note: When both channels are driven, the clip indicator will turn on at +15dBu.XLR BALANCED TEST:Note: Remove all 1/4” phone plugs from output jacks.2. Input a 500hz signal ~ -l0dBu into the channel A [B] input. Using your DVM, measure the A.C. voltage of channel A [B] output across pin 2 and pin 3 of the channel XLR jack. ( Note: connect the Black lead of the DVM to pin 3 and the Red lead of the DVM to pin 2).3. Your DVM should read4.0dBu (+/-0.5dBu).END OF TEST5381 Production DriveHuntington Beach, CA 92649(714) 897-67661112362x l135381 Production DriveHuntington Beach,CA 92649714-897-6766 • FAX 714-896-0736covered by U.S.Patent 4,482,866 and other U.S.and foreign patents pending.BBE is the registered trademark of BBE Sound,Inc.rev. 1 5/99。
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BBE音效增强处理电路芯片简介
PCB雕刻机，自动钻孔、刻线路，省心！
据节目源及听音环境灵活地调节其高频分辨率和低频补偿提升值，营造一个自己最喜欢听的音乐天地！
XR1071是美国EXAR公司推出的高分辨率BBE音效增强处理电路，其性能与BA3884相似，同样有低频补偿提升功能和高频分辨率提升调节功能，适合和各种音响系统相匹配，而且XR1071的性能参数指标高于BA3884。
XR1071采用双极性器件集成，其噪声极低，总谐波失真小，分辨率高，高频解析力（分辨率）及低频补偿提升调节范围大：高频解析力（分辨率）提升范围为0d B-9.7dB（通过调节17脚的电位器来改变17脚的直流电平来控制）；低频补偿提升调节范围为0d B～9.9bB（通过调节12、13脚、20、21脚的外接电位器阻值来调节）。
图3是XR1071的应用电路图，2脚为负电源输入端（－5V），31脚为正电源输入端（＋5V），16脚为BBE旁路控制输入端（高电平时为直通，空置时为BBE处理），17脚为分辨率控制输入端（通过电位器调节输入电平的大小而控制高频段幅度补偿量的大小），6脚为左声道信号输入端，27脚为右声道信号输入
端，15脚为左声道信号输出端，18脚为右声道信号输出端。
在音响系统中加入XR1071可令音质马上升级，能获得比BBE2150、BA3884更好的“BBE”效果，其噪音低，失真小、高频分辨率和低频补偿的提升调节范围大，更可最佳地合理调节，让你最满意。
BBE2150、BA3884、XR1071这三种芯片以XR1071效果最好，但价格较高，BA3884其效果接近XR1071且价格也低，属于性价比较好的BBE电路，BBE2150价格低，效果好，但分辨率是通过开关来控制的，应用时受到一定的限制，由于价格低，通过与功放的音调电路相配合使用，仍具有类同BA3884及XR1071一样分辨。