Rockville Micro Marine/ATV Amplifier 1600w Max 4 Channel 4x100/CEA Rated (RXM-S20) Rockville RXM-S20 1600 Watt 4 Channel Proton Micro Marine/ATV Amplifier With PA Microphone. PA Microphone with talkover-When you talk on the mic it will must the music and when you stop talking the music will come back on. CEA Compliant Power Ratings: 300 Watts (4 x 75 Watts) at 4 ohms and 1% THD+N. 400 Watts (4 x 100 Watts) at 2 ohms &lt; 1% THD. 400 Watts (2 x 200 Watts) bridged @ 4 Ohms &lt; 1% THD. RMS Power Ratings: 800 Watts (4 x 200 Watts RMS) @ 2 Ohms. 800 Watts (2 x 400 Watts RMS) @ 4 Ohm Bridged. 600 Watts (4 x 150 Watts RMS) @ 4 Ohms. Peak Power: 1600 Watts (2 x 800 @ 2 ohms or 1 x 1600 @ 4 Ohms. Marine amplifier with conformal coated PCB board. High-Speed MOSFET Power Supply. Studio-Grade Bipolar Output Stage Transistors. Double Sided Surface Mount (SMD) PCB Design. Selectable +6dB/+12dB Bass Equalizer @ 45hz. Channel Separation: 50 dB. Current drawn @ MAX RMS output: 27A @ 4ohm, 40A @ 2ohm. Efficiency @ MAX RMS output: 70% @ 4ohm, 63% @ 2ohm. 2-Ohm Stable Stereo. 4-Ohm Mono Bridgeable. 3 Channel Mixed-Mono Capable. Input sensitivity: 200mV-6V. Mute and Delay Soft Start System. Full IC-Controlled Protection Circuitry. 2 CH / 4 CH Input Mode Switch. RCA Preamp Line Output. 8 Volt Preamp Circuitry. Status Mode LED Indicator. 4 Gauge Lucite Encapsulated Power/Ground Terminals. 12 Gauge Lucite Encapsulated Speaker Terminals. THD+A: 0.01%. Frequency Response: 15Hz - 20KHz. Continuously Fully Adjustable 12dB / Octave Crossover with Differential Circuitry. Continuously Fully Adjustable High Pass Crossover: 50HZ &ndash; 250HZ. CH1 &amp; CH2 High Pass 50Hz - 250Hz. CH3 &amp; CH4 Low Pass 50Hz - 250Hz. CH3 &amp; CH4 High Pass 50Hz - 250Hz. Sensitivity: 100dB @ 1w / 1m. S/N Ratio: &gt;90dB. Damping Factor: &gt; 200 @ 100Hz. 2 x 25A Fuses. 6 LBS. Dimensions: (W x H x L) 6.7&quot; x 1.98&quot; x 10.7&quot;. Amplifier PA Microphone Mounting Hardware Owners Manual Rockville RXM-S20 1600 Watt 4 Channel Proton Micro Marine/ATV Amplifier With PA Microphone PA Microphone with talkover -  When you talk on the mic it will must the music and when you stop  talking the music will come back on 300 Watts (4 x 75 Watts) at 4 ohms and 1% THD+N 400 Watts (4 x 100 Watts) at 2 ohms &lt; 1% THD 400 Watts (2 x 200 Watts) bridged @ 4 Ohms &lt; 1% THD 800 Watts (4 x 200 Watts RMS) @ 2 Ohms 800 Watts (2 x 400 Watts RMS) @ 4 Ohm Bridged 600 Watts (4 x 150 Watts RMS) @ 4 Ohms <span class="a-text-bold">Peak Power:</span>1600 Watts (4 x 400 @ 2 ohms or 2 x 800 @ 4 Ohms Marine amplifier with conformal coated PCB board High-Speed MOSFET Power Supply Studio-Grade Bipolar Output Stage Transistors Double Sided Surface Mount (SMD) PCB Design Selectable +6dB/+12dB Bass Equalizer @ 45hz <span class="a-text-bold">Channel Separation:</span> 50 dB <span class="a-text-bold">Current drawn @ MAX RMS output:</span> 27A @ 4ohm, 40A @ 2ohm <span class="a-text-bold">Efficiency @ MAX RMS output:</span> 70% @ 4ohm, 63% @ 2ohm 2-Ohm Stable Stereo 4-Ohm Mono Bridgeable 3 Channel Mixed-Mono Capable <span class="a-text-bold">Input sensitivity:</span> 200mV-6V Mute and Delay Soft Start System Full IC-Controlled Protection Circuitry 2 CH / 4 CH Input Mode Switch RCA Preamp Line Output 8 Volt Preamp Circuitry Status Mode LED Indicator 4 Gauge Lucite Encapsulated Power/Ground Terminals 12 Gauge Lucite Encapsulated Speaker Terminals <span class="a-text-bold">THD+A:</span>  0.01% <span class="a-text-bold">Frequency Response: </span>15Hz - 20KHz Continuously Fully Adjustable 12dB / Octave Crossover with Differential Circuitry Continuously Fully Adjustable High Pass Crossover: 50HZ  250HZ CH1 &amp; CH2 High Pass 50Hz - 250Hz CH3 &amp; CH4 Low Pass 50Hz - 250Hz CH3 &amp; CH4 High Pass 50Hz - 250Hz <span class="a-text-bold">Sensitivity: </span>100dB @ 1w / 1m <span class="a-text-bold">S/N Ratio:</span> &gt;90dB Damping Factor: &gt; 200 @ 100Hz 2 x 25A Fuses 6 LBS <span class="a-text-bold">Dimensions:</span> (W x H x L) 6.7&#034; x 1.98&#034; x 10.7&#034;