Decription :
This board is a preamp board and cannot be connected directly to speakers. It must be connected to a subsequent stage of the power amp board for this preamp to work properly.
The so-called low-pass filter filters out the high-pitched part of the human voice board, keeping the low-frequency part to be amplified in an effort to improve the bass reproduction, people will not hear the sound of the instrument and the high-frequency sound playback. Buyers must be aware of this.
Feature:
Power supply voltage: DC 9V-32V DC single power supply
Two-channel input, subwoofer output, and then output amp | ifier, can not be directly connected to speakers
Multi-stage filter for better bass
Phase adjustable
Potentiometers from left to right: frequency adjustment, bass volume control
Cutoff frequency: 22HZ-240HZ
Distance from potentiometer axis to center: 3cm
PCB size: 62 9 * 26.5mm
Audio Input: Mono or Dual