Philips 2.1 DVD Home Theater System HTS6600/37 (Four Piece Set) (Discontinued by Manufacturer) 2.1 home theater system with Ambisound technology 1080i HDMI video upscaling with progressive for great HD pictures Compatible with iPods, USB flash drives and MP3 players with line out jacks Embraces multi-channel surround experience from just two speakers Includes smart surround technology to automatically suit the media being played