- Diecast aluminum heatsink - Signal sensing auto turn on - Hidden top mounted control panel - 12dB/octave Butterworth crossover - 1Ω stable (MONO Amps) - Short circuit protection - Remote bass knob - Input select switch (4/5 channel models) - Mono subwoofer amplifier - 250 watts RMS at 4 ohms (400 watts RMS at 2 ohms) - 600 watts RMS at 1 ohm - Variable low-pass filter (50-250 Hz, 12 dB/octave) - Variable bass boost (0-12 dB at 45 Hz) - Variable subsonic filter (20-50 Hz, 12 dB/octave) - Frequency response: 20-180 Hz - Class D amp technology Featuring a bold design with an LED accent beam, the Memphis Audio PRXA600.1 Amplifier boasts a powerful 600 watts of sound. A hidden top mounted control panel gives you easy access to make adjustments, while the diecast aluminum chassis provides improved heat dissipation for long-lasting performance. Power Reference Power Reference amplifiers are the backbone of Memphis. These durable performance amplifiers boast impressive power mixed with reliability and styling. Power Reference amplifiers are iconic in the audio industry for their versatility and ability to consistently provide high quality power to an audio system. Magnetic Control Cover Easily access your controls to dial in your system without any tools required. Simply remove the top mount cover, set your levels and let the magnetic clasps do the rest. Reliability You Can Count On Power Reference amplifiers are built to last. The pure aluminum chassis aids in heat dissipation when these amplifiers are being pushed to the limits. Built-in circuit protection prevents damage from overload, short circuit, thermal and reverse polarity. Power Reference amplifiers have been put to the test for decades and cont