Highlights: 4-channel car amplifier 50 RMS x 4 at 4 ohms (75 RMS x 4 at 2 ohms) 150 RMS x 2 bridged at 4 ohms (4-ohm stable in bridged mode) frequency response: 20-20,000 Hz Class AB amp technology variable high-pass filter on front channels (10-200 Hz, 12 dB/octave) variable high- and low-pass filters on rear channels (50-750 Hz, 12 dB/octave) preamp inputs 4-gauge power and ground leads and a 60-amp fuse recommended — wiring and hardware not included with amplifier no onboard fuses — when installing multiple amps in a system, an additional 60-amp in-line fuse between the distribution block and the amplifier is recommended 12-7/16"W x 2-5/16"H x 6-1/8"D warranty: 1 year