Rockville Rxd-m0 1200 Watt/600W RMS Mono Class D 1 Ohm Amplifier Car Audio Amp Rockville RXD-M0 1200 Watt / 600 Watt RMS Mono Class D 1 Ohm Car Stereo Amplifier with Optical Coupler Technology. CEA Compliant Power Ratings : (Rated at less than 1 % distortion) 1 Ohm : 300 Watts x 1 Channel &lt;1% THD+N . 2 Ohm : 200 Watts x 1 Channel &lt;1% THD+N. 4 Ohm : 150 Watts x 1 Channel &lt;1% THD+N . RMS Power Ratings : (Use these RMS ratings when comparing with great brands such as Hifonics, Earthquake, Soundstream, etc) 1 Ohm : 1200 Watts x 1 Channel . 2 Ohm : 800 Watts x 1 Channel. 4 Ohm : 600 Watts x 1 Channel. High-Speed MOSFET Power Supply. Optical Coupler Class D Technology. Studio-Grade Bipolar Output Stage Transistors . Fully Adjustable 12dB / Octave Crossover with Differential Circuitry. Low Pass Filter : 50Hz - 250Hz. Subsonic Filter : 15Hz - 55Hz. Phase Control Switch. Full IC-Controlled Protection Circuitry. Remote Dashboard Subwoofer Control. 8 Volt Preamp Circuitry. Status Mode LED Indicator. Minimum THD at Rated Power : 100dB. Frequency Response : 10Hz - 500KHz. Damping Factor : &gt; 200 @ 100Hz. 50 Amp Maxi Fuse. Dimensions : (W x H x L) 8.5" x 1.8" x 12.5".