MB Quart RA1-750.1 750 Watt Mono Amplifier 1-Ohm Car Audio Amp+Bass Remote

The RA1-750.1 is a mono Class D subwoofer amplifier rated 750W max and stable down to 1 ohm. Output is 1 x 300W at 4 ohms, 1 x 500W at 2 ohms, and 1 x 750W at 1 ohm, which gives you room to wire dual voice coil subwoofers however the install calls for and still land in the amp comfort zone. MB Quart Class Q1 topology brings Class D efficiency together with FLUID-FETS output devices and a Q-Stasis preamplifier stage focused on keeping distortion out of the signal path. Signal to noise measures above 99dB with THD under 0.07 percent across a 25Hz to 250Hz bandwidth. Tuning tools include a variable low-pass crossover from 50Hz to 250Hz at 12dB per octave, 0 to 12dB of bass boost, and a subsonic filter switchable between off and 25Hz to keep the driver from spending excursion on frequencies it cannot reproduce. Input sensitivity from 0.02 to 9V accepts factory head unit output or a strong aftermarket preamp signal, and DC Signal Sense powers the amp when signal reaches the RCA inputs, so OEM integration needs only an RCA adapter and no remote turn-on wire. The wired bass remote is included and mounts anywhere in the cabin, so level adjustments happen from the driver seat instead of the trunk. An aluminum heat sink and a rugged MOSFET pulse width modulation power supply handle heat without taxing the vehicle electrical system. The chassis weighs 7.35 lb, takes 4 AWG power wire, and uses a 80A external fuse.