Lepai LP-838 Super Bass Hi-Fi 2.1 Stereo Amplifier For AMP PC Car Home Play High quality stereo sound and heavy bass output RCA, MP3 input, it can be used as IPod, MP3/ MP4 headphone amplifier. Works with MP3, MP4 and Hi-Fi systems. Mini size easy to installation by DIY, especially good fit for car, motor bike, computer speaker and other home audio DIY Subwoofer output. Highly recommended to Subwoofer mania