Kicker 10C12D4 C12D4 Comp 12" 300w Car Subwoofer + Single Vented Sub Enclosure 12" Comp 300 Watt Dual 4 Ohm Car Audio Subwoofer. Best-sounding, loudest bass for the buck. Dual 4 Ohm voice coil. Super-rigid, injection-molded cone with 360-degree back bracing. High-temp coil wire. Vented pole piece for heat dissipation. Strong steel basket with coil-cooling perimeter venting. Ribbed surround for strength at high excursion Durable Spiralead tinsel leads. Tough, yellow double-stitching on surround. Handy spring-loaded terminals. Model C12D4. Size (IN.,CM) 12, 30.0. Impedance (OHMS) 4 DVC. Max Rec Amplifier Power (WATTS PEAK/RMS)* 400/200. Sensitivity (dB 1w/1m) 88.3. Frequency Response (Hz) 27-500. Mounting Depth (IN.,CM) 5-7/8, 14.8. Mounting Cutout (IN.,CM) 11, 27.9 Single 12" Vented Subwoofer Enclosure. 3/4" USA Heavy Duty MDF Construction. Machine precision cut mounting holes. Top of the line Glue for extra durable adhesion. High quality GOLD spring loaded terminals. Designed, tested, and engineered to work with most of todays popular woofers. These enclosures are built with the quality additives needed to maximize the performance of any sound system Type of Enclosure: Vented. Enclosure Sub Size: Single 12". Top and Bottom Depth: 16.0". Mounting Depth: up to 14.75" (enough depth for any sub on the market). Tuning Frequency: 42 Hz. Port Dimensions: 2" x 21" x 12" . Gross Volume Per Sub (Measurement for the outer dimensions of the box): 1.50 Cubic Feet. Net Volume Per Sub (Measurement for the outer dimensions of the box less the thickness of the wood and port): 1.22 Cubic Feet 10 Drywall Wood Screws (Wood screws are the type of screws; the screws are actually made of metal). 12 Feet of 14 AWG Blue Speaker Wire. 2 Spade Terminals