Pioneer GM-DX871 1600W Mono AmplifierThe GM DX871 mono subwoofer amplifier can deliver up to 800 watts RMS to your subwoofer, for powerful bass that will give every song a strong and heavy beat. Highly efficient Class D technology keeps this powerful amp running as cool as it looks, and allows for a small chassis that fits in a lot of out of the way spaces. Big Power Small Size Pioneers extra efficient Class D amplifiers mark a dramatic improvement in power output capability, yet are 50%