Multifunctional electronic crossover preamplifier (the actual product has been made and the function has been verified)

Compared with power frequency division, electronic frequency division has the characteristics of accurate and stable frequency division points, and can greatly improve the sensitivity of the speaker, making the speaker more dynamic and the sound layer richer; however, electronic frequency division will cause phase distortion and difficulty in the frequency division point. Adjustment problem, so I added a phase adjustment circuit to the circuit to adjust the phase of the high, medium and low signals to keep them consistent, and used precision adjustable resistors to set the frequency division points to facilitate later debugging.

Note: Due to my limited energy and financial resources, the second-order three-way electronic frequency divider does not have the proofing and verification function; however, there is also a fourth-order two-way electronic frequency divider that has been proofed on the PCB and the verification function has been used normally for some time. .

Wiring diagram

The following is the debugging method of the crossover point

1. Download and install FilterPro Desktop and open it to calculate the crossover point

2. This step can be adjusted according to the capacitor selected in the actual circuit.

That’s it. Now that the adjustment is complete and there are no other problems, you can enjoy music by connecting various cables.