This is a finished board, with a warranty of 3 months. If you need a non-default frequency, please take a customized link and leave a message.
Introduction to the circuit of the front-stage electronic two-way frequency board of the class A power supply:
This crossover board refers to the design of the American ESP company and is set as a stereo four-channel output structure. It inputs stereo left and right channel signals and outputs 4-channel signals, which are divided into left treble, left bass, right treble, and right bass, which can be directly promoted 4-way power amplifier circuit.
Highlights of this crossover board:
Excellent crossover circuit ★The crossover frequency has no peaks or valleys. ★The crossover point is easy to set. ★The 4-channel output can be adjusted independently.
The Class A power supply with excellent sampling of operational amplifier power supply is much more delicate than the LM317 337 78XX series power supply. The circuit comes with 4 times pre-stage gain amplification. Please let me know if you want to change the magnification of the previous stage.
According to different crossover points, we calculate the RC parameters. The capacitor specifications will be different from the picture at different frequencies. Please note
The crossover board is composed of the famous Linkwitz-Riley filter. Linkwitz-Riley (Chinese translation: Linkwitz-Rayleigh or translated as: Linkwitz-Riley) filter is mainly used in active filter circuits, such as many sophisticated multi-channel electronic crossover systems. The characteristic of the filter is that it has an attenuation slope as high as the fourth order. In other words, every other octave frequency, the sound will attenuate the energy of 24dB, that is, the attenuation slope is -24dB/Oct (Oct is Octave, an octave) The meaning of interval). At the same time, in the entire audio range (20Hz-20kHz), the Linkwitz-Riley filter has a very flat phase response, which is much better than the Butterworth filter. After the signal passes through the filter, there will be no phase distortion, so it is wide. Respected by audio enthusiasts.
Dear friend, are you still using that amplifier&x27;s post-frequency divider, which is made of inductors and capacitors with magnetic cores wrapped in tens of meters of enameled wire? The advantages of these things, which seriously damage the sound quality, are only to reduce the investment cost, but unfortunately they sacrifice the precious sound quality of the original sound, in exchange for the distorted and unnatural hearing. The front-end electronic crossover completely solves these problems. In the front-end small signal, the frequency is processed separately, and the power amplifier output is directly pushed to the speaker, allowing you to enjoy the real live atmosphere of the recording studio. Although many friends have invested a lot in the front-end equipment, it is a pity that they are stuck in this final output link, which is regrettable. It is not difficult to solve this problem. It is to use the front-end frequency divider + multi-channel power amplifier with excellent frequency crossover circuit. Our series of electronic crossover boards and power amplifier boards can perfectly realize your dreams
Main technical parameters:
1. Filter type: Linkwitz-Riley filter
2. Crossover point: 2200HZ (that is, 20-2200HZ is the bass output, 2200-20000HZ is the treble output). The crossover point can be customized for other frequencies. The best crossover point for different speakers is different. You can give me the crossover point, let me help You calculate the parameters of the circuit before selling
3. Attenuation slope: -24dB/Oct
4. Board structure: stereo four-channel output, treble, bass
5. Op amp chip: imported JRC&x27;s double-precision NE5532 (Of course, other op amps such as OPA2604AU, OP275G, TL072, etc. can be replaced according to customer needs to make up the difference)
7. Board size: 134*76mm
8. AC transformer power supply range from double 14 to double 19V
9. Connectors: audio input/frequency division output ---- 2 lotus sockets*3