The Deaf Bonce DB-3512R D2 / DB-3512R D1 are capable of handling 3500 watts RMS and 7000 watts maximum. They feature a ribbed surround structure that allows for extreme linear excursions of 22.5 mm in any direction. The centering spider is generously ventilated, and the diaphragm and dust cap are made of carbon, which not only looks fantastic but also significantly reduces the diaphragm mass and greatly stiffens the diaphragm. properties Model DB-3512R D1 / DB-3512R D2 12" (30cm) Subwoofer Size of the voice coil 3.50 inches Konus: Carbon Magnet: Ferrite Surround: Foam RMS power: 3500 watts MAX power: 7000 watts Frame: Aluminum Impedance: 1+1 / 2+2 Ohm SPL: 86.80 / 86.90 dB Fs: 32.50 / 32.80 Hz Qts: 0.39 / 0.40 BL: 24.80 / 26.90 Vas: 28.90 / 29.60 L Xmech: 45.00 mm Xmax: 22.50 mm Dimensions Installation depth: 244.0 mm Cut-out dimension: 284.0 mm Weight: 35.95 kg