You can also check 2500w Classd Amp and Planet Audio BB4000.1 Big Bang 4000 Watt, 1 Ohm Stable Class D Monoblock Car Amplifier with Remote Subwoofer Control for a better comparison at Classdamplifiers.biz.

RMS Rating (14.4V): 4 400 watts x ohms: 600 watts 1 chan.
RMS Rating (12.5V): 300 chan. 2 ohms: watts x Unregulated MOSFET switching type power supply Speed Class topology Wired JL remote level sold separately LED and protect (red/yellow) indicators State-of-the-art Mono channel Rollback System completely eliminates annoying thermal Studio-grade with fully variable Extruded aluminum alloy setting Total amplifier efficiencies Noise-killing, highly flexible inputs RCA to chain amps and infrasonic crossover speaker terminals speaker installation System Protection circuitry overload, and speaker protection) Heavy duty alloy heat sink extreme heat dissipation.
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