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Rockford Fosgate Punch P400X4 because this is a punchline Fosgate amp the specs are less than half the watts advertised.. realistically it puts out double what it says it does..

4-Channel Amplifier About this product

Punch 400 Watt 4-Channel Amplifier | P400X4 rockfordfosgate.com · Manufacturer The Rockford Fosgate Punch P400X4 amplifier delivers 50 watts RMS to both front and rear speakers, providing clean and powerful music even at higher volume levels. Utilize the high-pass filter to increase speaker efficiency by eliminating low bass. Additionally, the amplifier can be switched to 2-channel mode for powering two subwoofers with up to 200 watts RMS each. The built-in low-pass filter allows for optimal sound adjustment for your subwoofer and enclosure combination. Bass and treble boosts are also included through the Punch EQ2, allowing for added depth and brightness to your music. Less Number of Channels 4 Amplifier Class Class A/B Bridgeable Yes Connection Type RCA Depth 11.03 in Height 2.38 in Width 7.76 in Weight 4.89 Kg. Audio Outputs Speakers output Number of Outputs 1 Pair (RCA pre-amp audio outputs) Output Channel Quantity 4 Output Types RCA Type Class A/B, Amplifier Design Highlights Stealth top mounted control panel, Cast aluminum heatsink RMS Power Rating 50 Watts x 4 @ 4-Ohm Total Power Output 600 Watts Bridged Output Channels 4 Signal-to-Noise Ratio 85 dB Total Harmonic Distortion