The CompRT 10-Inch Subwoofer is an all-weather thin subwoofer with a pair of 2Ω voice coils. With our custom SoloKon™ technology and the CompRT’s unique interior support system, the sub sounds fat – but keeps it thin! The CompRT 10-Inch Subwoofer works best with a sealed or ported enclosure and 400 watts of recommended power Size: 10" Impedance: Dual 2-Ohm voice coils Power Handling: 400 Watts RMS / 800 Watts Peak Sensitivity: 84.8dB Mounting Depth:3-7/16" Mounting Diameter: 9-1/8" Minimum Sealed Box Volume: 0.40 cu. ft. Maximum Sealed Box Volume: 1.25 cu. ft. Minimum Vented Box Volume: 1.25 cu. ft. Maximum Vented Box Volume: 1.75 cu. ft.