110 watts x 7 into 8 ohms (20-20,000 Hz) at 0.08% THD THX® Surround EX, Dolby® TrueHD, DTS-HD™ Master Audio, Dolby® Digital Plus, DTS-HD™ High Resolution Audio, Dolby® Digital EX, DTS-ES™, Pro Logic® IIx, and DTS Neo:6 decoding Audyssey Laboratories' MultEQ six-point auto setup and room calibration system (microphone included) XM Satellite Radio Ready with decoding for XM's HD Surround channels (requires XM subscription and optional XM tuner kit) iPod® integration (requires optional Marantz iPod dock) M-DAX (Marantz Dynamic Audio eXpander) for better sound with compressed music sources two-room/two-source output: powered and line-level stereo audio output for 2nd room (using powered 2nd room stereo output allows 5.1 home theater in main room) composite video output for 2nd room Pure Direct modes switch off all unused circuitry for the cleanest possible sound back surround speaker channels re-assignable for bi-amping front left and right speakers 192kHz/24-bit digital-to-analog converters for all channels HDCD decoder Dolby® Headphone listening mode backlit learning/multibrand LCD remote backlit multibrand second room remote (requires remote control extender system, not included) 17-5/16"W x 7-1/4"H x 16-15/16"D weight: 33 lbs. {url removed}