8'' In-Wall / In-Ceiling High Power Subwoofer: "8'' In-Wall High Power Subwoofer2.0'' High Temperature Dual Voice Coil Power Handling: 150W RMS, 300W Peak Frequency Response: 60Hz- 4 KHz 4-8 Ohm Impedance Cut-Out Dimensions: 7 7/8'' W x 7 7/8'' H x 3 1/2'' D"