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1.Original 4 NE5532 (two for the left and right channel audio amplification process, and the other two consisting of 4-order low-pass filter for the subwoofer output, frequency adjustable from 50Hz-150Hz)
2.Supply voltage: AC12V-0-AC12V or AC15V-0-15V
3.Potentiometer function: low-frequency adjustment, subwoofer volume. Left and right channel volume, bass, treble
4.PCB size: 165x 53 mm; plate thickness: 2mm, thickness of copper foil: 2 oz, is 2 times the normal board
5.The distance between the potentiometer: 30mm
Features:
1.delay protection.
2.amplifier midpoint potential protection
Package:
1x 2.1 Preamp Tone Volum Board subwoofer pcb with heavy bass output 50Hz-150Hz
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