CT Sounds Thermo 12 Inch Shallow Mount Car Subwoofer 300w RMS Dual 4 Ohm Ct sounds, shallow mount 12" subwoofer 300w rms, dual 4 ohm Sub power: <span class="a-text-bold">300W (RMS) | 600W (MAX) </span> Sub size: 12&#034; Sub type: Dual 4 ohm Voice coil (dia): 2&#034; (50.8mm) FS: 44.108 Hz QTS: 0.642 QES: 0.739 QMS: 4.886 VAS: 48.248 liters SPL: 89.4 dB (@1w/1m) Speaker connector: 12 AWG Displacement: 0.08 cu. ft. Dual 4 voice coil car subwoofer Shallow mount subwoofer; especially optimized for low height/mounting depth vehicular installation &amp; low air volume boxes Dual spring terminals for quick &amp; easy connectivity; EISV wire connected through the spider Incorporates quality Y35 ferrite magnet Strong &amp; sturdy steel basket capable of holding strong subwoofer flexes and aid in producing rock solid bass beats 1 x Thermo 12&#034; D4 Car Shallow Subwoofer (Dual 4 ohm) Sealed: 0.60 ~ 1.25 cu. ft. Ported: 1.25 cu. ft. Cutout diameter: 280mm / 11&#034; Overall diameter: 318mm / 12.5&#034; Mounting depth: 96mm / 3.75&#034;