Subwoofer Low Pass Filter/Preamplifier Module

NE5532-based subwoofer low pass filter and preamplifier board. Works on 10-24V DC with line input and features volume and frequency controls. 

Please note: this is a preamplifier board and will not drive a passive subwoofer directly. 

Specifications:
Supply Voltage: 12-24V DC
Frequency Range: 22-300Hz
PCB Dimensions: 78 x 32mm
Audio Input: Stereo/Mono via screw terminals