Rockford P400X1 Punch 1-Channel Mono Block Amplifier 250 Watts x 1 @ 4-Ohm / 400 Watts x 1 @ 2-Ohm Works with factory installed & aftermarket source units Onboard 12dB/octave LP/HP/AP crossover On-board Punch EQ with +18dB boost at 45Hz Cast Aluminum Heatsink with Stealth top mounted control panel