RCF 12" Speaker, 550W, 97dB, 40-2000Hz, X-max 6.8mm, weight 7.3kg. This high-power 12" woofer boasts exceptional power handling and minimal distortion. Its copper voice coil construction, suspensions, and cone materials are engineered to withstand 450Watt RMS power. **Features:** - 3-inch fiberglass inside/outside copper voice coil - 900W continuous program power handling - 97 dB Sensitivity - 40 Hz – 2 kHz Frequency range - M-roll surround and exponential cone geometry **General Specifications:** - Nominal Diameter: 300 / 12 mm/inch - Rated Impedance: 8 ohm - Program Power: 900 W AES - Power handling capacity: 450 W AES - Sensitivity: 97 dB - Frequency Range: 40 Hz ÷ 2000 Hz - Effective Piston Diameter: 260 / 10.2 mm/inch - Max Excursion Before Damage (peak to peak): 36 / 1.4 mm/inch - Minimum Impedance: 7.2 ohm - Voice Coil Diameter: 76 / 3 mm/inch - Voice Coil Material: Copper - Voice Coil Winding Depth: 18.5 / 0.7 mm/inch - Number of layers: 2 - Kind of layer: inside / outside - Top Plate Thickness: 10 / 0.4 mm/inch - Cone Material: No pressed pulp - Cone Design: Curved - Surround Material: Polycotton - Surround Design: M-roll **Thiele/Small Parameters:** - Resonance frequency: 43 Hz - DC resistance: 5.8 ohm - Mechanical factor: 4.6 - Electrical factor: 0.23 - Total factor: 0.22 - BL Factor: 19 T · m - Effective Moving Mass: 56 g - Equivalent Cas air load: 97 liters - Effective piston area: 0.053 m2 - Max. linear excursion (mathematical): 6.8 mm - Voice-coil inductance @ 1kHz: 2.0 mH - Half-space efficiency: 3.23% **Mounting Information:** - Overall Diameter: 320 / 12.6 mm/inch - Bolt Circle Diameter: 293-304 / 11.5-12 mm/inch - Bolt Hole Diameter: 6.5 / 0.3 mm/inch - Front Mount Baffle Cut-out: 282 / 11.1 mm/inch - Rear Mount Baffle Cut-out: 284 / 11.2 mm/inch - Depth: 138 / 5.4 mm/inch - Volume occupied by the driver: 2.6 / 0.09 liters/ft3 - Net Weight: 7.3 / 16.2 kg/lbs **Shipping Information:** - Shipping weight: 8.1 / 18.0 kg/lbs Experience the power and precision of the RCF 12" Speaker, designed for exceptional performance in a variety of audio applications.