100 watts x 2 (stereo) into 8 ohms (20-20,000 Hz) at 0.08% THD 4-ohm capability allows use with a wide range of speakers XM Satellite Radio Ready (requires XM subscription and optional XM tuner kit SIRIUS satellite radio capable (requires SIRIUS subscription and optional SiriusConnect™ home tuner kit) iPod® integration (requires optional iPod dock) dual-room/dual-source audio (line-level stereo audio output for 2nd room) 3 audio inputs (including phono), and 4 A/V inputs (composite video) line-level subwoofer output three front-panel display brightness settings (dim, dark, normal) direct access tuning 40 AM/FM presets rotary bass and treble controls Pure Audio/Direct mode for cleaner sound headphone jack front-panel switching for two pairs of main speakers anti-resonant aluminum front panel high-current, low-impedance amplifier design oversized power transformer, filter capacitors, and heat sink sleep timer 17-1/8"W x 5-7/8"H x 13-3/4"D weight: 19 lbs.