Dual 8'' In-Wall High Power in wall Subwoofer System: "2x8'' In-Wall High Power Subwoofer 2.0'' High Temperature Dual Voice Coil Power Handling: 300W RMS, 600W Peak Frequency Response: 60Hz-4KHz 8 Ohm Impedance Overall: 20'' (W) x 10.2'' (H) x 4.6'' (D) Cut Out: 18.6'' (W) x 8.8'' (H) x 4.0'' (D)