RCF 12" Speaker, 400W, 98dB, 50-3000Hz, X-max 5.5mm, weight 7.3kg Experience high efficiency with this 12" mid-bass speaker. Boasting very high sensitivity, excellent linearity, and minimal distortion, it is designed to handle 400 Watts RMS power effortlessly. Features: - 3-inch fiberglass inside/outside copper voice coil - 800W continuous program power handling - 98 dB Sensitivity - 50 Hz – 3 kHz Frequency range - M-roll surround and exponential cone geometry General Specifications: - Nominal Diameter: 300 / 12 mm/inch - Rated Impedance: 8 ohm - Program Power: 800 W AES - Power handling capacity: 400 W AES - Sensitivity: 98 dB - Frequency Range: 50 Hz ÷ 3000 Hz - Effective Piston Diameter: 260 / 10.2 mm/inch - Max Excursion Before Damage (peak to peak): 38 / 1.49 mm/inch - Minimum Impedance: 7.2 ohm - Voice Coil Diameter: 76 / 3 mm/inch - Voice Coil Material: Aluminum - Voice Coil Winding Depth: 16 / 0.6 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: 53 Hz - DC resistance: 5.4 ohm - Mechanical factor: 4.7 - Electrical factor: 0.28 - Total factor: 0.27 - BL Factor: 17 T · m - Effective Moving Mass: 48 g - Equivalent Cas air load: 72 liters - Effective piston area: 0.053 m2 - Max. linear excursion (mathematical): 5.5 mm - Voice-coil inductance @ 1kHz: 0.7 mH - Half-space efficiency: 3.69% 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 Enhance your sound system with this powerful and reliable RCF speaker.