The RX-V690 Natural Sound A/V receiver is a powerful and versatile audio/video control center. 70mm Movie Theater Cinema DSP multiplies the effects of Dolby Pro-Logic and Yamaha DSP to recreate the movie theater experience in you home. Front panel A/V inputs provide easy connection of a camcorder or other A/V components. Dual center channel outputs allow for utilizing two center channel speakers for a larger system or with a big screen television. Subwoofer out with LPF allows for direct subwoofer connection. 200Hz Low Pass Filter ensures best possible subwoofer performance. 35mm Dolby Pro-Logic Enhanced creates the same type of sound you experience in movie theaters with multi-speaker arrays.In addition to Yamaha's unique 70mm Movie Theater, TV Theater and Dolby Pro Logic Normal and Enhanced programs, the RX-V690 offers a special sports program and five Hi-Fi DSP programs: Concert Hall, Rock Concert, Stadium, Jazz Club and Church. Yamaha's amazingly powerful, compact LSI provides extremely accurate Dolby Pro-Logic decoding and digital sound field processing. 64-key learning remote lets you program and control additional components such as a VCR, Laserdisc player, or TV. This receiver lets you hook up not only three audio components, but four audio/video units as well. You also get S-video terminals. A linear damping factor of 80 (8 ohms 20 - 20 kHz) means plenty of ability to stop the speaker cone from vibrating when the signal stops. The result is clear crisp pure sound and significantly improved frequency response. Preset stations can be grouped in five sets of eight, according to AM and FM, or musical genre, or any order you desire. Sleep timer switches unit off, after up to two hours of play in 30 increments. A/B speaker selector allows use of one or both sets of speakers.