Podium Pro PP121 12-Inch Pair Subwoofers Pro Audio DJ PA Karaoke Band Replacement 250 Watts RMS & 500 Watts Max per piece 55 - 5000 Hz Frequency Response - 95 dB - 8 ohm High Temperature 2" Parabolic 4-Layer Aluminum Kapton Voice Coils - 55 oz. Magnets and Vented Pole Pieces Sturdy Poly-Infused Paper Cones with Cloth Accordion Edge Surrounds - Progressive Rolled Spiders Overall Dimension is 12" - Fits Enclosure Hole Size of 11" - Mounting Depth is 4.625"