Features: 
  1, adjust the potentiometer selected Hermetically, inputs and outputs use pure copper terminals, wiring is very convenient. 
  2, selected NE5532, welded IC holder can always replace the amplifier, experience differe nt effects to enhance playability. 
  3, design of the LED Real-time monitoring the power supply situation. 
  4, PCB board design simple and beautiful, reasonable wiring, making the board has a very high signal to noise ratio, strong anti-interference ability. when no signal input close to the speaker almost hear the noise. 
  Main parameters: 
  Power supply voltage: DC12V-24V DC single power supply 
  Frequency range: 22Hz-300Hz 
  Audio input: mono or two-channel 
  Audio output: monaural 
  PCB Size: 78x32mm, thickness: 1.6mm 
  PCB Materials: FR-4 ultra-hard glass plate 
  Finished plate net weight: 30g 
  Plate mounting holes center to center spacing: 70x24mm, hole diameter: 3.2mm 
  Potentiometer shaft center to center spacing: 32.5mm 
  Package Include: 
  1 x DC 12V-24V Low-pass Filter NE5532 Subwoofer Process Pre-Amplifier Preamp Board Electric Circuit Integrated Circuits 
 




