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Feature

Adjust the potentiometer selected Hermetically, inputs and outputs use pure copper terminals, wiring is very convenient.
Selected NE5532, welded IC holder can always replace the amplifier, experience different effects to enhance playability.
Design of the LED Real-time monitoring the power supply situation.
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.

Description

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.
Special reminder:
This board is a board bass preamp, directly connected to the speaker will not say anything, must be connected to the subsequent stage amplifier board made of pure active subwoofer to speak, pure stage power amplifier board selected according to individual needs of the degree of shock, The greater the power of pure power amp bass more shocking.
The so-called low-pass filter plate is to filter the human voice more than treble part, retain the low frequency part is amplified to improve the bass reproduction efforts will not hear the human voice and high-frequency sound when playing the instrument. The buyer must understand this knowledge, in order to avoid the only, do not know how to use.
Most of the market before the subwoofer preamp board are basically dual power, the majority of DIY enthusiasts, is not very convenient to use, after all, a single power supply is relatively easy to find, the premise of guaranteeing effective, we have introduced a single-supply subwoofer home board, you can share a stage with the power amplifier boards, DIY is very convenient.
Package included:
1 x Low-pass Filter NE5532 (with 2 rotary potentiometer cap).