Cadence QR Series 4Channel Amplifier Class D Specifications Channel: Class 4 Channel/ Class D RMS Power@2 OHM 80 watts x 2 + 125 watts x 2 RMS Power@4 OHM 80 watts x 4 Fuses: 1 x 25A Dimensions: (LxWxH) 9,21" x 6,3" x 2,05"  / 23,39cm x 16 x 5,21cm Features Low level RCA inputs LED indicators for power and diagnostic High level auto-start technology