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This stereo preamp module adopts high-performance AD828 chip for dual-channel audio pre-amplification. It accepts wide DC input ranging from 5V to 15V and works perfectly with 12V power adapters. Built with low-noise circuitry to preserve original sound quality and eliminate unwanted noise. Small-sized PCB fits well in active speakers, power amplifiers and DIY audio systems, featuring straightforward wiring for fast assembly and audio modification projects.