Rockville W12K9D2 V3 12" K9 Series Dual 2-Ohm Subwoofer — 4000W Peak / 1000W RMS

Overview: Rockville W12K9D2 K9 Series 12" V3 subwoofer with Dual 2-Ohm voice coils delivers 4000 Watts peak, 2000 Watts program and a CEA-rated 1000 Watts RMS. Built for high-power car audio systems with heavy-duty components and thermal management features. Power & Motor Structure: - Peak Power Handling: 4000 Watts. Program Power Handling: 2000 Watts. CEA Rated RMS Power Handling: 1000 Watts. - Double-stacked 190 Oz high-quality magnet assembly in a cast aluminum basket with a black sanded finish for efficiency and reduced weight. - Air-tight, high BL magnetic motor gap and a vented hole on the T-yoke to improve heat dissipation. - 10mm T-Yoke + 10mm washer. Voice Coil & Wiring: - 3" 4-layer black aluminum voice coils wound with OFC wire. The OFC wire used is made in USA and the voice coil is rated to hold 240℃, providing long service life and high power handling for this class of subwoofer. Cone, Surround & Suspension: - Black non-pressed paper cone with a durable, attractive finish — ultra-stiff for higher power capability. - Thick foam surround for improved sound quality and reduced distortion. - Red stitching cone reinforcement for long-term durability. - New ultra-stiff PolyPropylene (PP) dustcap. - Nomex spider for superior tear resistance and long-term reliability compared to cotton and poly-cotton spiders. Connections & Cosmetic Details: - Two chrome-plated binding post terminals that accept multiple wire gauges, resist oxidation and simplify connections. - Special custom rubber boot magnet covers protect the magnet and enhance appearance. - Custom Rockville mounting gasket included to simplify installation and provide a clean look. Thermal & Adhesives: - Uses a highest-grade black glue designed to withstand extremely high temperatures, enabling the woofer to tolerate more power than its ratings. Impedance & Performance: - Impedance: Dual 2-Ohm voice coils. - Sensitivity: 83dB. Frequency Response: 33 Hz - 1.5K kHz. Recommended Enclosure Volumes: - Sealed enclosure: 0.46 - 1.24 cubic feet. - Vented/ported enclosure: 0.53 - 1.41 cubic feet. Physical & Mounting Dimensions: - Cutout Diameter: 11.13" inches. Mounting Depth: 6.85" inches. - Weight: 28.67 Lbs. Shipping Weight: 33 Lbs. - Shipping Box Dimensions: 14.57" x 14.57" x 10.83" Inches. Thiele-Small (TS) Parameters: - Fms: 35.7 Hz. Re: 4.0 Ohm. Res: 106.8 Ohm. Qms: 4.94. Qes: 0.52. Qts: 0.47. - Rms: 11.2kg/s. Cms: 0.08mm/N. Mms: 246.6 gr. Nref: 0.25%. - Bl: 20.7N/A. SPL: 86dB. VAS: 29.5L. Rp: 34.7 Ohm. - LP: 31.1mH. CP: 779.2uF. Le: 2.05mH. Detailed Mechanical Measurements: - 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).