Details: 750 watts RMS x 1 at 4 ohms 1500 watts RMS x 1 at 2 ohms Class bd technology requires 4-gauge power and ground leads and a 150-amp fuse and fuse holder — wiring and hardware not included with amplifier selectable 50-250 Hz variable low-pass crossover, 24 dB/octave MEHSA mounting technology increases the heat transfer from the MOSFET output devices to the heat sink, for higher power output, lower operating temperatures, and greater reliability TOPAZ noise-killing differential inputs eliminate 80% of ground loop noise preamp outputs for easy connection to a second amplifier wired remote control of Punch Bass (0-18 dB centered at 45 Hz) — gives you fingertip control of your bass impact subsonic filter removes frequencies below the range of human hearing for increased efficiency bd Sync — allows two identical Class bd amps to be tied together to power one woofer (using an optional)