Rockville W15K9D4 K9 Series 15" Subwoofer — Dual 4-Ohm, 5000W Peak / 1250W RMS (CEA)

Overview: Rockville W15K9D4 K9 Series 15" car subwoofer built for high power output and long-term reliability. Designed with heavy-duty components and advanced cooling for demanding audio systems. Power Ratings: - Peak Power Handling: 5000 Watts - Program Power Handling: 2500 Watts - CEA Rated RMS Power Handling: 1250 Watts Motor, Coil & Magnet: - 3" 4-layer black aluminum voice coils wound with OFC wire (Made in USA) - Voice coil temperature resistance: can hold 240℃ - Double stacked 190 Oz high quality magnet - Air-tight high BL magnetic motor gap - Vented hole on T-yoke to improve heat dissipation - 10mm T-Yoke + 10mm Washer Cone, Surround & Suspension: - Black non-pressed paper cone with a durable finish for increased stiffness - Thick foam surround to reduce distortion - Red stitching cone reinforcement for extended life - New ultra-stiff PolyPropylene (PP) dustcap - Nomex spider for superior tear resistance and long-term reliability Basket, Terminals & Finishes: - Cast aluminum basket with black sanded finish for efficiency and reduced weight - Two chrome-plated binding post terminals (accept any gauge wire; resistant to oxidation) - Special custom rubber boot magnet covers for protection and appearance - Custom Rockville mounting gasket for an attractive, easy installation Construction & Adhesives: - Uses the highest grade black glue able to withstand extremely high temperatures to help the woofer handle rated power Electrical / Impedance: - Impedance: Dual 4-Ohm voice coils - Sensitivity: 87.9dB Enclosure Recommendations: - Sealed enclosure volume: 1.75 - 2.9 Cubic Feet - Vented/Ported enclosure volume: 2.5 - 3.85 Cubic Feet Physical Dimensions & Weight: - Cutout Diameter: 14.09" inches - Mounting Depth: 8.23" inches - Weight: 34.17 Lbs. - Shipping Weight: 38.58 Lbs. - Shipping Box Dimensions: 17.72" x 17.72" x 12.4" Inches Frequency Response: - 32 Hz - 1.5K kHz TS Parameters: - Fms: 32.0 Hz - Res: 76.2 Ohm - Re: 7.6 Ohm - Qms: 5.27 - Qes: 0.72 - Qts: 0.63 - Rms: 10.3kg/s - Cms: 0.09mm/N - Mms: 270.9 gr - Nref: 0.39% - Bl: 24.1N/A - SPL: 87.9dB - VAS: 87.9 L - Rp: 51.5 Ohm - LP: 53.8mH - CP: 560.5uF - Le: 3.32mH 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)