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. Power Reference amplifiers feature a bold design complete with a wrap around LED accent light beam and a magnetic control panel cover allowing you to adjust the amplifier controls without tools for an effortless adjustments. The new cast aluminum chassis promotes improved heat dissipation which improves reliability and performance. PR amplifiers deliver the power and performance Memphis Audio fans have come to expect from our best-selling amplifier line. Features: 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) Specifications: RMS POWER 4Ω (w) 100 x 2 RMS POWER 2Ω (w) 150 x 2 Bridged/Mono Power 4Ω (w) 300 x 1 THD% 4Ω