Description of the Loewe SUB 525 D Loewe SUB 525 Subwoofer Principle: 1-Way Bass Reflex, active Nominal/Music Power (Sine/max.) 100 W / 170 W (Subwoofer channel) Frequency Range: 34 Hz ​​– 250 Hz (-6 dB) Power Stages Total Power: 525 W 5 digital power stages (Class D) for connecting front and surround speakers: 75 W each, 6 Ohm; 1 digital power stage (Class D) for subwoofer channel: 150 W (Sine) Bass Intensity Control Deep Bass Filter 50 Hz – 250 Hz Bass Equalizer Power Switch Standby Switch Signal Recognition Audio-Link Gold-Terminal Screw Terminal Connections RCA Connectors Electronics Cover Stand available optionally Including 2 satellite speakers and all cables. Can be connected to your DVD player or pre-amp. Carefully shipped