CT Sounds Tropo 15 Inch Car Subwoofer 450w RMS Dual 2 Ohm Ct sounds product 15" subwoofer 450 watts power Dual 2 ohm Version 2.0 Dual 2 (ohm) voice coiled car audio subwoofer This subwoofer is rated at 450W RMS | 900W MAX Voice coil of 2.5&#034; (dia) Incorporates a tripple stacked Y35 ferrite magnet The sub has got strong steel molded basket frame SPL grade/ competition graded subwoofer for car audio car audio competitions Spring terminals for quick &amp; easy sub connectivity Embossed logo circular rubber around the sub magnet EISV wire to the voice coil from the spring terminals Composite foam surround for better and smoother sub flexes Double stitcked paper cone with sub surround as the diaphgram Sub power: <span class="a-text-bold">450W (RMS) | 900W (MAX) </span> Sub size: 15&#034; Sub type: Dual 2 ohm Voice coil (dia): 2.5&#034; / 63.5mm FS: 33.733 QTS: 0.565 QES: 0.670 QMS: 3.620 VAS: 96.161 liters SPL: 89.3 dB (@1w/1m) Xmax: 12.5mm (Single way) Speaker connector: 12 Gauge Displacement: 0.15 cu. ft. Sealed: 2.50 cu. ft. Ported: 3.00 ~ 4.00 cu. ft. Cutout dia: 361mm / 14.2&#034; Overall dia: 391mm / 15.4&#034; Mounting depth: 188mm / 7.4&#034; 1 x Tropo 15&#034; D2 Car Subwoofer (Dual 2 ohm)