Pyle PLWCH12D 12-Inch 1,200-Watt Ultra Slim DVC Subwoofer High-quality Poly-mica Cone Butyl Foam Surround Dual 4ohm High-temperature Voice Coils 12'' High Quality Poly Mica Cone - Power Handling: 600Watts RMS/1200 Watts Peak - Overall Diameter: 12.6'' Butyl Foam Surround - Frequency Response:28 Hz - 2.2K Hz - Mounting Depth: 3.28'' Dual 2.5'' High Temperature Kapton Voice Coil - Impedance (Per coil) : 4 Ohm - Includes Installation Template Independently Fused 20 Amp Speaker Terminals - Fs:29.1, Qms:4.08, Qes:0.44, Qts:0.396, Vas (L)102.18 75 Oz Magnet Structure - Efficiency: 92 dB