The all new CompR sub is the very model of power and reliability. Play them all day. They love it as much as you do. The CompR 10-Inch Subwoofer is a 4 Ohm dual voice coil design, making it easy to get the most out of your amp. An advanced suspension and heat management system helps to keep the bass powerful, deep and consistent – all without a hint of distortion. The CompR 10-Inch Subwoofer works best with a sealed or ported enclosure and 400 watts of recommended power. Recommended Amplifiers CX Monoblock. Size – 10″ (25 cm) – Impedance – 4 Ohm Dual Voice Coil – Peak Power – 800 W – RMS Power – 400 W – Sensitivity – 84.6 dB 1w/1m – Mounting Depth – 5 1/4″ (13.3 cm) – Mounting Diameter – 9 1/8 (23.1 cm) – Min Sealed Box Vol – 0.8 cu ft (22.7 L) – Max Sealed Box Vol – 1.25 cu ft (35.4 L) – Min Vented Box Vol – 1.25 cu ft (35.4 L) – Max Vented Box Vol – 1.75 cu ft (49.6 L).