Cadence QRS Series 2 Channel Class G/H Full Range Amplifier QRS2.180GH Specifications Channel/Class: 2 G/H RMS Power@2 ohm-14.4V: 300Wx2 RMS Power@4ohm-14.4V: 180W x2 BridgeRMS Power@4 ohm-14.4V: 600W x 1 Minimum THD: 0.05% S/N Ratio: >86 dB Fuse Rating: 35A x 3 Dimensions (Lx W x H): 13.78″x 7.56″x2.32″