(2) Rockville W10K9D4 10" Dual 4-Ohm Subwoofers — 6400 Watt Peak (Pair)

Pair of Rockville W10K9D4 K9 Series 10" car subwoofers with dual 4‑ohm voice coils. Power ratings: Peak Power Handling 3200 Watts each (6400W pair), Program Power 1600 Watts, and CEA Rated RMS Power 800 Watts. Motor and coil: 3" 4-layer black aluminum voice coils wound with OFC wire made in USA, stable up to 240 degrees celcius; double-stacked 164 Oz high-quality magnet for strong motor force. Basket and appearance: cast aluminum basket with a black sanded finish for reduced weight and improved efficiency, plus custom Rockville mounting gasket for an airtight install and special custom rubber boot magnet covers for protection and style. Cone and suspension: ultra-stiff black non-pressed paper cone (thicker and stronger for higher power handling), thick foam surround to minimize distortion, red stitching reinforcement for durability, and a new ultra-stiff polypropylene (PP) dustcap. Thermal and durability features: vented hole on T-yoke to improve heat dissipation, high BL magnetic motor gap, Nomex spider for tear resistance and long-term reliability, and high-temp black adhesive used throughout for greater power tolerance. Terminals and wiring: two chrome-plated binding post terminals. Electrical and enclosure specs: Impedance: Dual 4-Ohm voice coils. Sensitivity: 83dB. Frequency Response: 33 Hz - 1.5K kHz. Recommended sealed enclosure volume: 0.55 0.95 Cubic Feet. Recommended vented/ported enclosure volume: 1.2 1.8 Cubic Feet. Xmax / excursion: Xmax is 27MM.. XMAX: 26 MM. Mechanical dimensions: Cutout Diameter: 9.37 inches. Mounting Depth: 6.3 inches. 10mm T-Yoke + 10mm Washer. Weight & shipping: Weight: 27.55 Lbs.. Shipping Weight: 30.85 Lbs.. Shipping Box Dimensions: 13.58" x 13.58" x 12.6" Inches. Additional detailed 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).