Brief introduction of BBE sound effect enhancement processing circuit chip

BBE sound effect enhancement processing technology is an audio technology used by the US BBE Sound Inc to greatly improve the quality of listening sound, and can intelligently correct and restore any defects in the audio system that lead to signal loss and phase deviation due to various reasons. Therefore, the sound is reproduced realistically, and the listening experience is rich in high and low sounds. At the same time, the original lost sound details can be reproduced. The sense of positioning, clarity, and brightness are close to the ideal live sound effect. Adding BBE circuit to the sound system will make The sound is brighter, giving you more depth, slenderness and clarity. The treble is slender, the midrange is transparent and mellow, the bass is full and natural, so that the listener has an immersive effect. Due to the limited layout, BBE technology is introduced in detail in this journal and other electronic publications, so I won't make too much description here.

Since BBE entered the Chinese audio field in 1998, it has been widely promoted and loved and respected by enthusiasts. At present, powerful audio manufacturers have applied BBE circuits to their products, making their products more popular with enthusiasts. I suggest if not there amplifier power amplifier and want to buy a friend should be selected with "BBE" function of well-known brand products, Ruoyi have not satisfied the amplifier and BBE friends can buy a finished board can be added to the list so that the amplifier upgrade, Enjoy the ideal original sound effect that "BBE" brings to you, which is clear, slender, and bright. It costs only a few tens of yuan. The installation method is very easy. Just connect the signal of the audio source to the signal input terminal of BBE, and then The signal output end processed by BBE can be connected to the input end of the power amplifier. The BBE board can be installed in the power amplifier or audio source (in the CD player, VCD player, etc.), and the power supply is taken from the DC power supply in the machine (be careful not to exceed three terminals The maximum operating voltage of the voltage regulator IC, and pay attention to the heat dissipation of the three-terminal voltage regulator IC).

Common BBE processing circuit chips are BBE2150, BBE2152 (ie NJM2150, NJM2152) of Japan JRC Company, BA3880, BA3884, BH3868 of Japan ROHM Company, XR1071, XR1075 of EXAR Company of the United States, etc. Here we introduce the current widely used audio products in China Chips BBE2150, BA3884 and XR1071. These three BBE chips are highly respected and loved by enthusiasts, and the BBE finished boards of these three chips are produced by many manufacturers in China and handle the mail order business. For example, Yunan, Guangdong Province County US-electronics factory, the specific price can be found in the plant's mail-order advertising.

JRC BBE2150 Japan has introduced BBE processing circuit, and its main characteristics: Operating voltage 4.5V-13V (typ 9V), the operating current 8-12mA, and having a through-BBE selection function, a high frequency resolution and low frequency compensation BBE each 2 choices (6dB and 9dB). 1 is a circuit diagram of FIG. BBE2150 of 1 foot and 20 feet to the left and right signal input terminal, 7 feet and 14 feet to the left and right signal output terminal, 11 is a power supply pin, the pin 12 is a positive power supply input, pin 10 It is the control terminal of BBE and through switch (BBE is turned on at high level, and BBE is turned off at low level), pin 8 is BBE high frequency resolution control terminal (9dB at high level, 6dB at low level), pin 9 To correct the envelope distortion control terminal (low frequency boost compensation, 9dB at high level, 6dB at low level). The audio signal after BBE2150 sound enhancement process, its effect is very obvious, feel a clear treble, naturally beautiful, detail particularly strong, thick bass naturally when a pass-through into BBE. It's amazing to hear the original sound effect!

BBE2150 Although good results, but due to the high frequency resolution, low frequency compensation values ​​are lifting gear control, will find some use restrictions Accordingly, whereupon the second generation BBE improved product appearance, e.g. BA3884, XR1071, etc., where first introduced BA3884. ROHM BA3884 Japan has introduced BBE circuit, its main features: 5.4-12.3 operating voltage (typically 9V), the operating current of about 13mA, and having a through-BBE selection function; a high resolution and to enhance the low frequency compensation can be flexibly adjusted (high frequency resolution of 8 feet by external potentiometer to control the range of 0 ~ 9.6dB, controlled by an external low frequency compensation potentiometer 7 feet, the range is 0 ~ 8.8dB). FIG 2 is a circuit diagram of the application of BA3884, 19 feet for the positive power supply input, pin 6 of the power supply, the pin 7 is to enhance the low frequency compensation control terminal, pin 8 is the frequency resolution of the lift control input terminal, pin 14 of the right channel signal an input terminal, pin 13 is a right channel signal output terminal, pin 23 is left channel signal input terminal, 24 feet for the left channel signal output terminal. The BA3884BBE circuit is added to the sound system. In addition to the clear, slim, bright and natural sound quality that "BBE" brings to you, you can also flexibly adjust its high frequency resolution and low frequency according to the program source and listening environment. Compensate the boost value and create a favorite music world!

U.S. EXAR XR1071 is introduced resolution enhancement processing circuit BBE Sound, BA3884 its performance and it is similar to the high frequency and low frequency compensation function to enhance the enhance resolution adjustment function, and a variety of audio systems for match, and performance XR1071 parameter index higher than BA3884. XR1071 integrated bipolar devices, the noise is very low, total harmonic distortion, high resolution, high-frequency resolving power (resolution) and the low frequency compensation adjustment large lifting range: frequency resolving power (resolution) of the range of lift 0dB-9.7dB (control by changing the 17-pin potentiometer to change the 17-pin DC level); low-frequency compensation boost adjustment range is 0dB ~ 9.9bB (by adjusting the external potentiometer resistance of 12, 13, 20, 21 feet Value to adjust). Figure 3 is the application circuit diagram of XR1071. Pin 2 is the negative power input (-5V), pin 31 is the positive power input (+ 5V), and pin 16 is the BBE bypass control input (through at high level, and at idle). BBE processing), Pin 17 is the resolution control input (adjust the input level through the potentiometer to control the magnitude of the high-band amplitude compensation), Pin 6 is the left channel signal input, Pin 27 is the right channel signal an input terminal, pin 15 of the left channel signal output terminal, pin 18 is a right channel signal output terminal. Adding XR1071 to the audio system can immediately upgrade the sound quality, and can obtain a better "BBE" effect than BBE2150 and BA3884. It has low noise, low distortion, high frequency resolution and low frequency compensation. to reasonable regulation, make you most satisfied.

The three chips of BBE2150, BA3884 and XR1071 have the best effect with XR1071, but the price is higher. The effect of BA3884 is close to XR1071 and the price is also low. It is a BBE circuit with a good price-performance ratio. switch control, subject to certain limitations when applied, because they are inexpensive, by using the pitch cooperating amplifier circuit, and XR1071 still have similar BA3884 as resolution by adjusting the treble tone, low frequency compensation can be adjusted by the bass tone. So BBE2150 is also loved by enthusiasts. At present, the most used BBE chip for audio products (power amplifiers) is BBE2150, followed by BA3884, and XR1071 is less used because of the higher price. However, due to the good effect of XR1071, many enthusiasts are willing to spend more money to add XR1071 to it. Upgrade your own audio equipment to enjoy the most high-end "BBE" effect.

The circuits in Figure 1-3 are equipped with three-terminal voltage regulator IC, so it is very convenient to install in various power amplifiers, CD players, VCD machines, super VCD machines, etc. The power supply can be directly taken from the DC power supply in the machine (do not exceed three The highest working voltage of the terminal voltage regulator IC, and pay attention to the heat dissipation problem), if there is indeed no one can add a transformer and make a power board to supply power to it, of course, one more transformer will increase the interference of the electromagnetic field on the audio and damage the sound quality. Although BBE2150, BA3884, XR1071 can enhance the sound quality, the peripheral components are also very important. If the peripheral components are poor, it is like a flower inserted on cow dung. Therefore, it should be a good horse with a golden saddle: ①The circuit board uses copper and platinum thick epoxy circuit boards, and the circuit boards of BA3884 and XR1071 use silver plating technology, which is good for sound quality and fidelity; ②The signal coupling capacitor uses Japanese capacitors. The other electrolytic capacitors use ruby, black diamond, ELNA and other brands of fever products; ③ electrodeless capacitors use Japanese music CBB metalized non-inductive capacitors or MKP capacitors; ④ resistance uses imported five-color ring metal film low noise resistance, and potentiometers use imported high-quality Products such as X · T brand.

After installing BBE in the audio system, pay attention to it: according to different sound sources and listening environment, the amount of high and low bass should be reasonably controlled, especially the high frequency resolution should be improved properly, because the trimming effect of the BBE circuit is very obvious. BBE processing systems of various sound systems to be installed in different grades can make audio playback effect with better clarity, fidelity, presence, giving the listener a clear thin, transparent and bright ...... original sound effects . Interested assembly Hi-Fi may be combined as solutions assembly friend: audio (CD players, VCD machines, etc.) → BBE circuit (e.g. BBE2150, BA3884, XR1071, etc.) → LM4610N (having a volume, tone, balance, loudness control And 3D sound field processing function) → power amplifier (such as TDA7294, LM3886TF, TDA1514A, LM1875T, etc., the best effect is TDA7294! The power amplifier IC has perfect functions, the internal circuit is a field effect tube differential input, and the driving stage and power output stage are also used Field effect tube, so it has a beautiful tone similar to the tube amplifier-soft, round, delicate, rich in music). In addition, a toroidal transformer, power board and horn protector can be equipped. Pay attention to the grounding method when assembling. The capacity of the filter capacitor should be large, which not only solves the noise problem but also meets the needs of large dynamics. I believe as long as its performance is certainly reasonable assembly market a lot better than the amplifier!

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