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Interface Description:
1.P1 connect power supply and signal output to the power amplifier board
2. Power supply + v G -V is the power supply port, connect positive and negative dual power DC +/- 12v, or +/- 15V.
3. Signal output GS, G signal ground, S subwoofer signal output, connected to the signal input of the power amplifier board.
4. PHASE: phase.
5. HPF front output: 120HZ low-cut switch.
6.LIMIT: Compression limit lamp, overload lamp.
7.signal: signal light
8.power: power light
9.LINE LEVEL: volume control
10.output L, output R: front full frequency and high pass output.
11.INPUT L INPUT R: signal input, sensitivity 1v (0dbV)
12.CROSSOVER: Frequency adjustment 80-150HZ.
Size: 208x46MM
Customer
Reviewed in the United States on April 9, 2025
This subwoofer preamp board gets the job done with its handy 120Hz low-cut switch and clean signal output, though the XLR connections feel oddly pro-audio focused for a home theater or satellite setup. It works well once you figure out the wiring (good luck with the non-existent instructions - you'll need to search online for "STL300ASUB" or AIYIMA amp docs to make sense of it). A functional, no-frills option if you need basic subwoofer signal processing, but don't expect plug-and-play convenience.
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