Skar Audio RP-600.5 Multichannel Amplifier Class AB/D 5-Channel Amplifier 4 Way Protection Circuitry: Thermal, Voltage, Speaker, DC RMS Power at 4 Ohms: 60 Watts x 4 Channels + 250 Watts x 1 Channel (14.4v) RMS Power at 2 Ohms: 90 Watts x 4 Channels + 300 Watts x 1 Channel (14.4v) RMS Power at 1 Ohm: 400 Watts x 1 Channel - 5th Channel (14.4v) RMS Power at 4 Ohms (Bridged): 180 Watts x 2 Channels (14.4v) High Speed MOSFET Power Supply Soft Turn on Circuit Frequency Response: 20Hz - 20kHz Signal to Noise Ratio: 105dB (CH1-4) / 85dB (CH5) Bass EQ Switch: 0dB - 12dB Low Pass Filter (Variable): 50Hz - 500Hz High Pass Filter (Variable): 20Hz - 5kHz Subsonic Filter (Variable): 10Hz - 50Hz (CH5) 4 Gauge Power and Ground Terminals Working Voltage: 8.5V - 14.4V Fuse Rating: 80 Amp Dimensions: 16.93" (Length) x 6.30" (Width) x 2.20" (Height)