Harman/Kardon AVR 645 Receiver By Shane Buettner   •   April, 2007

• $1,499
• 75-Watts x 7 into 8 ohms
• Processing Modes: DD, DD-EX, ProLogicIIx, Dolby Headphone and Dolby Virtual Speaker, DTS, DTS-ES/Discrete/Matrix/Neo: 6, DTS 24/96, Logic 7

Features We Like: Two HDMI 1.1 inputs (PCM-audio compatible), three component inputs, EzSet/EQ auto calibration and room EQ, three each coaxial and toslink optical digital audio inputs, one 7.1-channel analog audio input, XM Ready, USB Audio and iPod connectivity, AV sync delay, A-BUS Ready, multi-source/multi-zone

HK's AVR 645 combines the best of old school, high-current sound from Harman/Kardon and burgeoning next-gen connectivity. In addition to seven channels of amplification and the expected Dolby and DTS surround decoding, the AVR 645 features HDMI switching that's compatible with hi-res PCM audio, USB audio, iPod and XM Satellite Radio compatibility.