16-PRX300.4 - Memphis 4-Channel 300W RMS 600W Max Power Reference Amplifier Compact aluminum chassis | Ultra bright LED accent lighting | Signal sense turn on Variable Bass Boost (0-12dB) centered at 45Hz | High level speaker inputs | Fully variable high & low pass crossovers Protection circuitry against overload, short circuit, thermak & reverse polarity with LED status lighting | Remote level bass boost | Removable magnetic "M" badge conceals top mount controls RMS 4 (Watts): 50 x 4 | RMS 2 (Watts): 75 x 4 | RMS 1 (Watts): N/A | Bridged Mono Power 4 (Watts): 150 x 2 THD % (4): &lt;0.02 | Frequency Response: 20Hz - 20kHz | Dimensions: 12.9" x 7.4" x 2"