The Rockville RV208P Dual 8″ 800 watt vented subwoofer enclosure will give you great sound quality at an affordable price. This system is designed to give you premium sound quality and enough power handling to shake your mirrors. This subwoofer is for people who want extra added bass that you can feel. It will play loud enough to eb heard from down the block but this is not one of those subs designed to win bass competition. This sub is for people who want great sound. Subwoofer and Enclosure Features: Rockville RV208P Dual 8″ 800w Car Audio Subwoofers in Vented Sub Enclosure Box. 4 Ohm Impedance . 800 Watts Peak Power . 400 Watts RMS continuous music rating (Match up with an amp that delivers 400w RMS @ 4 ohms). 250 Watts RMS Test Tone rating (Playing test tones is brutal on a sub compared to music). Bonded, Stapled and Braced 3/5″ MDF Cabinet. Computer Designed, Under-Side Bass Reflex, Aero-Port System. Angled at 15% for near perfect in vehicle bass alignment. Exterior: Logo embroidered high quality aviation grade tweed carpet.. Mono, gold-plated push style, speaker terminal. High-Power, High-Efficiency 12″ Subwoofer. Injection Molded, Talc Filled, Brushed Polypropylene Cone. High Excursion Butyl Rubber Surround. 3-D Molded Dust Cap. Linear Progressive Spider System. 4 Layer, High-Power, Aluminum Voice Coil. Bumped and Vented Magnet Motor Structure. Frequency Response: 50Hz – 500Hz. SPL: 89dB @ 1w/1m. 45oz Magnet Motor Structure Weight. Total Cabinet Weight: 21 Lbs.. Dimensions: 20.2″ (L) x 12.5″ (W) x 10.9″ (H)