CD receiver with built-in amplifier (18 watts RMS/50 peak x 4 channels) Detachable, fold-down face (with silver and blue cosmetics and variable button color) Plays audio CDs, CD-Rs and CD-RWs including discs burned with MP3 and WMA files Bass Engine (bass center frequency, width, and level, plus treble center frequency and level adjustments) MaxTune tuner 12 FM/6 AM presets Source tone memory XM and SIRIUS Satellite Radio controls CD changer controls for Alpine Ai-NET changers only Front, rear and subwoofer preamp outputs Wireless remote CEA-2006 compliant amplifier CD frequency response 5-20,000 Hz CD signal-to-noise ratio 105 dB FM sensitivity 9.3 dB