Preamp Board 2.1 Channel Subwoofer Pre‑Amp Low Pass Filter Amplifier Circuit Board Tone Control Board with Independent Interfaces for Full Frequency and Bass Output Signals
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- Adjustable The onboard bass FM potentiometer can be adjusted widely, so that the subwoofer can be harmoniously integrated in the middle and high tones, without a sense of violation.
- Compatible Design The pre-amplifier board adopts the phase switch design, the non-inverting amplifier and the seesaw amplifier are compatible for use, and the design is reasonable.
- Features Preamp board 2.1 channel is made of synthetic cardboard, supports DC 12-30V and AC 9-20V input voltage, powerful and practical. The frequency range of subwoofer circuit board is 20-20KHz for full tone 20-200Hz for bass
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