<p>This is a 600 Watt 4-channel amplifier with high dynamic power using Class-a/b technology and a conformal coated pc board designed for motorsport and marine applications.</p><p>The Punch PM600X4 multi-channel amplifier is versatile to power any audio system configuration. In addition to 4-channel stereo mode, you can bridge both channels to create a high power 2-channel amp, or run stereo speakers on the front with subwoofers on the rear in 3-channel mode. The variable HP/LP crossover and built-in Punch EQ allows for precise tuning of Bass frequencies and the Pass-Thru RCA jacks provide flexibility as your system grows and keeping Y-adapters to a minimum.</p><h2>Punch Marine 600 Watt 4-Channel Amplifier Features:</h2><ul><li>High level input capable with Auto Turn-On circuit</li><li>RCA pass-thru outputs</li><li>Features C.L.E.A.N. Set-up</li><li>Optional remote Punch Level Control (PLC2) ready (w/ input clip indicator)</li><li>12dB/octave Butterworth crossover</li><li>On-board Punch EQ with +18dB boost @ 45Hz</li><li>Muted turn on</li><li>Stealth top mounted control panel</li><li>Cast aluminum heatsink</li><li>Short circuit protection</li><li>Over current protection</li><li>Marine grade two part epoxy coating on circuit boards</li><li>Marine grade stainless steel hardware</li></ul><h2>Specs:</h2><ul><li>Number of Channels - 4</li><li>Total Power (Sum of Rated Power) - 600 Watts</li><li>Rated Power (RMS Continuous Power) - 75 Watts x 4 @ 4-Ohm, 150 Watts x 4 @ 2-Ohm, 300 Watts x 2 @ 4-Ohm Bridged</li><li>Dynamic Power (PVC/PowerCube®) - 129 Watts x 4 @ 4-Ohms 0° Res, 211 Watts x 4 @ 2-Ohms 0° Res</li><li>Bridgeable - Yes</li><li>Frequency Response - 20Hz to 20kHz +/- 1.0dB</li><li>Input Sensitivity - 150 mV - 12 V</li><li>Circuit Topology Class - Class A/B</li><li>Efficiency (average) - 68% @ 4-Ohm</li><li>Total Harmonic Distortion (THD+Noise) - 4-Ohm: </li><li>Signal Input - Hi/Low level: 2 RCA pair</li><li>Signal Output - Low level: 1 RCA pair</li><li>Tone Controls - Front Punch EQ2 Bass: 0dB to +18dB @ 45Hz and/or, Front Punch EQ2 Treble: 0dB to +12.5dB @ 12kHz, Rear Punch EQ2 Bass: 0dB to +18dB @ 45Hz and/or, Rear Punch EQ2 Treble: 0dB to +12.5dB @ 12kHz, Function depends upon LP/AP/HP switch position</li><li>Crossover Controls - Front/Rear High-Pass (HP): 50Hz-250Hz @ 12dB/octave Butterworth, Front/Rear Low-Pass (HP): 50Hz-250Hz 12dB/octave Butterworth, All-Pass: Yes</li><li>Remote Controls - Optional Punch Level Control (PLC2) Ready</li><li>Visual Indicators - Power/Protect/Thermal LED, Input Clip LED3, Output Clip LED1,2,3 (LED Color Legend: 1BLUE: </li><li>Power Wire Gauge - 4 AWG</li><li>Power Input Connector - Captive C-Clamp</li><li>Speaker Wire Gauge - 8 AWG to 18 AWG</li><li>Speaker Output Connector - Captive C-Clamp</li><li>Cooling - Convection</li><li>Heatsink</li><li>Operating Voltage - 9 - 16 VDC</li><li>Recommended Fuse (not included) - 100 A</li><li>Average Current Draw (13.8V Music) - 45 A</li><li>Max. Current Draw (13.8V Sinewave) - 90 A</li><li>Suggested Alternator - 75 A</li></ul>