Rockville W12K9D4 K9 V3 12" Dual 4-Ohm Subwoofer — 4000W Peak / 1000W RMS

Overview: The Rockville W12K9D4 K9 Series V3 is a 12" car subwoofer built for high power and durability. It features Dual 4-Ohm voice coils and is rated for 4000 Watts peak, 2000 Watts program, and 1000 Watts CEA RMS. Voice Coil & Cooling: This sub uses a 3" 4-layer black aluminum voice coil wound with OFC wire. The OFC wire is made in USA and the coil is rated to handle 240℃, providing superior temperature resistance and long-term reliability. A vented hole on the T-yoke improves heat dissipation. Motor & Basket: The woofer employs a double-stacked 190 Oz high-quality magnet and a cast aluminum basket finished in black sanded paint, yielding a lighter but efficient motor structure. A high BL magnetic motor gap and a 10mm T-yoke + 10mm washer are used to maximize motor strength. Terminals & Connectivity: Two chrome-plated binding post terminals provide secure, oxidation-resistant connections and accept any gauge wire for easy hookup. Cone, Surround & Suspension: The cone is a black non-pressed paper design with a refined finish for added stiffness. Thick foam surround and red stitched cone reinforcement reduce distortion and extend lifespan. A new ultra-stiff polypropylene (PP) dustcap is included, and a Nomex spider offers superior tear resistance and longevity compared with standard cotton or poly-cotton spiders. Protection & Fit: Special custom rubber boot magnet covers protect and enhance the appearance of the magnet. A custom Rockville mounting gasket is included for an attractive, airtight installation. The driver uses the highest grade black glue rated for extreme temperatures to increase power handling. Impedance & Specs: Impedance: Dual 4-Ohm voice coils. Frequency Response: 33 Hz - 1.5K kHz Sensitivity: 83dB Cutout Diameter: 11.13 inches Mounting Depth: 6.85 inches 10mm T-Yoke + 10mm Washer Air-Tight High BL Magnetic Motor Gap Enclosure Recommendations: Sealed enclosure volume: 0.8 - 1.25 Cubic Feet Vented/Ported enclosure volume: 1.75 - 3.0 Cubic Feet Physical & Shipping: Weight: 28.67 Lbs. Shipping Weight: 33 Lbs. Shipping Box Dimensions: 14.57" x 14.57" x 10.83" Inches TS Parameters: Fms: 35.7 Hz, Res: 89.4 Ohm, Re: 7.6 Ohm, Qms: 4.60, Qes: 0.61, Qts: 0.54, Rms: 11.8kg/s, Cms: 0.08mm/N, Mms: 242.4 gr, Nref: 0.22%, Bl: 26.1N/A, SPL: 85.3dB, VAS: 30.0 L, Rp: 53.7 Ohm, LP: 48.8mH, CP: 499.5uF, Le: 3.28mH Detailed Mechanical Info: Body: Non-Pressed Paper Gap Plate Inside Diameter: 95mm (3.74 inches) Gap Plate Outside Diameter: 190mm (7.5 inches) Gap Plate Thickness: 25mm (1 inch) Yoke Outside Diameter: 180mm (7.1 inches) Yoke Thickness: 10mm (0.4 inches) Yoke Pole Diameter: 75mm (3 inches) Made in USA: The OFC wire and voice coil construction are made in USA to ensure consistency and durability at this power handling level.You may also like Rockville W12K9D4 K9 Series 12" 4000 Watt Subwoofer with RSQ12S 0.75 Cu Ft Sealed Enclosure.