Philips HTS6600 DVD home theater system. Video formats supported: DivX 3.11 DivX 4.x DivX 5.x DivX 6.0 DivX Ultra MPEG1 MPEG2, Analog signal format system: PAL NTSC. Audio formats supported: MP3 WMA, Equalizer: Action Rock Concert Classic Drama Jazz MTV RnB Gaming Party Cartoon Lounge Sports News, Sound enhancement: Smart Surround DoubleBass Treble and Bass Control. Supported radio bands: AM FM. Satellite speaker impedance: 6 Ом. Subwoofer type: Active, Subwoofer driver size: 25.4 mm (1 "), Subwoofer frequency range: 30 - 120 Hz