Rockford Fosgate Punch 4 Channel 400 Watt Full Range Class D Amplifier PBR400X4D

Frequency Response: 20Hz - 20kHz +/- 1dB Power Wire Gauge: 8 AWG Operating Voltage: 9 - 16 VDC Speaker Wire Gauge: 16 AWG Input Sensitivity: 150 mV to 12 V Rockford Fosgate Punch 4 Channel 400 Watt Full Range Class D Amplifier PBR400X4D This Listing Includes: (1) Amplifier Specifications: Number of Channels: 4 Total Power(Sum of Rated Power): 400 Watts Bridgeable: Yes Frequency Response: 20Hz - 20kHz +/- 1dB Input Sensitivity: 150 mV to 12 V Circuit Topology Class: Class D Efficiency (average): More Than  75% Power Wire Gauge: 8 AWG Power Input Connector: Detachable Compression Terminal Speaker Wire Gauge: 16 AWG Cooling: Convection Heatsink: Extruded Aluminum Operating Voltage: 9 - 16 VDC Recommended Fuse(not included): 60 A Average Current Draw (13.8V Music): 27 A Max. Current Draw (13.8V Sinewave): 50 A Suggested Alternator: 75 A Total Harmonic Distortion (THD+Noise) -  4-Ohm Less Than 1.0 -  2-Ohm Less Than 1.0 Signal Input -  Input Switch: 2ch/4ch input switch -  Hi-Level: Variab