Competition HCCA HCCA1000.4 Car Amplifier, 1000 W RMS, 2000 W PMPO, 4 Channel, Class D, Bridgeable, 0.1% THD, 20 Hz to 20 kHz, MOSFET Power Supply, 4 x 150W @ 4 Ohm, 4 x 250W @ 2 Ohm, 2 x 500W Bridged Power @ 4 OhmOrion Competition HCCA HCCA1000.4 Car Amplifier, 1000 W RMS, 2000 W PMPO, 4 Channel, Class D 4 x audio channels to power a few pairs of speakers While compact sized, Class D offers supreme power with improved audio throughput Uplift the audio power by bridging 2 x 500W @ 4 Ohm together Integrated MOSFET power supply with rapid switching capability increases amp efficiency