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The number of Channels is only one factor of many when considering Home-theater Surround performance. Harman Kardon AVR645 focuses on Sound quality with the most fidelity throughout the listening spectrum for superior realism and a pleasurable experience. AVR645 combines the sonic power of a high-current, ultrawide-bandwidth amplifier with the Computer power of Texas Instruments' most advanced Audio DSP to deliver unparalleled performance. With exclusive, Integrated EzSet/EQ functionality, speaker, Output and delay settings are automated for optimal equalization to your room acoustics. Add Video conversion circuits that output all video sources via Component connections with on screen graphics, a digitally-tuned AM/FM radio (that's Optionally Upgradeable to digital radio), and, of course, the ability to play through up to 7 speakers plus a subwoofer, this is a Receiver that's worth owning.