SONY DAV-C770 DVD Dream(TM) System (Discontinued by Manufacturer) The heart of the system is a 5-Disc DVD/CD/SACD/Changer Receiver module, with 6 coordinated outboard speakers 6 channel digital amplifier (90W x 5 + 100W for Subwoofer) 2-Way Front Speakers with 2-3/8 woofers Center and Surround Speakers with 2-3/8 full-range drivers Subwoofer with 7 driver