Memphis Audio PRXA600.1 Power Reference Series Mono Subwoofer Amplifier, 600 Watts RMS x 1 at 1-Ohm

Durable diecast aluminum heatsink for efficient heat dissipation under heavy use. Automatic signal-sensing turn-on eliminates the need for remote turn-on wiring. Controls are discreetly located on a hidden top-mounted panel for a clean, installed appearance. Built-in 12 dB/octave Butterworth crossover provides smooth low-pass filtering for subwoofer use. Protective circuitry includes short-circuit protection to help prevent damage to the amp and connected speakers.