Rockville RMW8A 8" 800w Tunnel Slot Ported Powered Subwoofer Enclosure+Amp Kit CEA Rated RMS Power = This is an official tested rating by a specific industry standard. This is the way the top brands in the industry such as Kicker, Rockford, etc rate their items. This subwoofer is 200 watts RMS CEA rated. This rating is measured at a very specific distortion level. You can feel confident matching this with a high end amplifier from Kicker, or Rockford, or any other high end brand that uses CEA compliant ratings. Rockville RMW8A 8" 800w Tunnel Slot Ported Powered Subwoofer Enclosure Class D. Built in Amplifier. 8 High power long excursion tuned subwoofer. CEA Power Rated 200 Watts / 400 Watts RMS / 800 Watts Peak. 1.5 high temperature 4 layer Kapton voice coil. 70 oz magnet structure weight. Talc filled polypropylene molded cone. Linear progressive spider suspension. Stitched to cone double laminated surround . Extended pole piece technology. Construction: CNC-Cut High-Grade MDF. Steel mesh grill. Remote Bass Knob Included. Recommended amplifier power: 200W- 400Wrms. Nominal Impedance: 4 Ohm. Frequency Response: 30Hz  500Hz. SPL: 96dB@1w/1m. Dimensions (W x L x H): 5.3 x 19 x 11. Rockville RWK10 10 Gauge 2 Channel Car Amplifier Wiring Installation Kit. (1) 17 High Grade Twisted Pair of 100% Copper RCA Cable. 17' 10 Gauge Translucent Blue SuperFlex Power Cables. 17 18 Gauge Blue Remote Cable. 17 16 Gauge Clear Speaker Wire. 3' 10 Gauge Clear SuperFlex Ground Wire. Gold Plated AGU Heat Resistant Fuse Holder. 40 Amp ATU Inline Fuse. 7 Split Tube Loom. Accessories Included: Wire Ties, Ring Terminals, Butt Connectors, Spades, and Grommets Soft abrasion proof insulating jacket allows for 100% improved flexibility . PVC outer jacket can with-stand an extreme temperature range of -40 to 220 degrees F