Pre-stage electronic two-way board Linkwitz-Riley crossover 2 way divider

Description

The circuit can be designed according to the crossover point of the customer's needs.
Default
Crossover point: 2200HZ (that is, 20-2200HZ is bass output 2200-20000HZ for treble output)
Class A power supply pre-electronic two-frequency board circuit description:
It is set to a stereo four-channel output structure. It inputs stereo left and right channel signals and outputs 4 channel signals.
It is divided into left treble, left bass and right treble and right bass, which can directly drive 4 channels of power amplifier circuit.
Highlights of this crossover board:
1.Excellent crossover circuit
2.Crossover frequency without peaks or valleys
3.Easy to set crossover points
4.Independent adjustment of 4-channel output
5.Design with fever level
6.Perfect reproduction of original sound colors
The best class A power supply for power supply sampling of the op amp is far more delicate than
that of the LM317 337 78XX series power supply. The circuit comes with 4x preamp gain amplification.
Please tell us in advance if you want to change the preamplifier.
According to different crossover points, we calculate the RC parameters. Capacitance specifications will differ from the pictures at different frequencies.
The crossover board consists of the famous Linkwitz-Riley filter. Linkwitz-Riley (filter, mainly used in active filter circuits, such as many sophisticated multi-channel electronic crossover systems, this filter is characterized by up to the fourth-order attenuation slope, in other words, each At frequencies one octave apart, the sound attenuates 24dB of energy, ie, the attenuation slope is -24dB/Oct (Oct, which means Octave, an octave), and at the same time in the entire audio band (20Hz-20kHz), Linkwitz - The Riley filter has a very flat phase response, which is far superior to the Butterworth filter. After the signal passes through the filter, it does not produce phase distortion, and it is widely respected by audio enthusiasts.
The main technical parameters:
1. Filter type: Linkwitz-Riley filter
2. Crossover point: 2200HZ (that is, 20-2200HZ is bass output 2200-20000HZ for treble output) Crossover point can be customized for other frequencies (free customized) The best crossover frequency of different speakers is different, can give me crossover points
.
3, attenuation slope: -24dB/Oct
4, plate structure: stereo four-channel output, treble, bass
5, op amp chip: original double precision NE5532 (we can use other op amps such as: OPA2604AU OP275G TL072 as your request.)
7, board dimensions: 134*76mm
8, AC transformer power supply range double 14 to double 19V
9. Connector: Audio input/divide output----2 Lotus socket*3