Speaker 15", 650W, 100dB, 40-3000Hz, X-max 5.5mm, weight 5.0kg The MB15N351 speaker is engineered to deliver exceptional linearity in frequency response with minimal distortion. Featuring a robust neodymium magnetic structure and a new 3.5” voice coil, this transducer offers increased power handling compared to standard 3" voice coils. The innovative Dual-forced air venting system ensures efficient voice coil ventilation to minimize power compression at higher power levels. Features: • 3.5-inch inside/outside copper voice coil • 1300W continuous program power handling • 100 dB Sensitivity • 40 Hz – 3 kHz Frequency range • Dual-forced air ventilation for minimum power compression • Dual spider design with silicon-based dampening control General Specifications: • Nominal Diameter: 380/15 mm/inch • Rated Impedance: 8 ohm • Program Power: 1300 W AES • Power handling capacity: 650 W AES • Sensitivity: 100 dB • Frequency Range: 40 Hz ÷ 3000 Hz • Effective Piston Diameter: 330 / 13 mm/inch • Max Excursion Before Damage (peak to peak): 39 / 1.5 mm/inch • Minimum Impedance: 6.8 ohm • Voice Coil Diameter: 87 / 3.4 mm/inch • Voice Coil Material: Copper • Voice Coil Winding Depth: 16.5 / 0.65 mm/inch • Number of layers: 2 • Kind of layer: inside/outside • Top Plate Thickness: 11 / 0.43 mm/inch • Cone Material: No pressed pulp • Cone Design: Curved • Surround Material: Polycotton • Surround Design: M-roll Thiele/Small Parameters: • DC resistance: 5.6ohm • Mechanical factor: 4.0 • Electrical factor: 0.24 • Total factor: 0.22 • BL Factor: 22.5 T · m • Effective Moving Mass: 80 g • Equivalent Cas air load: 191 liters • Effective piston area: 0.0855 m2 • Max. linear excursion (mathematical): 5.5 mm • Voice-coil inductance @ 1kHz: 1.65 mH • Half-space efficiency: 5.68% Mounting information: • Overall Diameter: 393 / 15.5 mm/inch • Bolt Circle Diameter: 371-376 / 14.6-14.8 mm/inch • Bolt Hole Diameter: 6.5 / 0.3 mm/inch • Front Mount Baffle Cut-out: 354/13.9 mm/inch • Rear Mount Baffle Cut-out: 354 / 13.9 mm/inch • Depth: 164 / 6.4 mm/inch Volume occupied by the driver: 3.8 / 0.13 liters/ft3 • Net Weight: 5.0 / 11.0 kg/lbs Shipping information: Shipping weight: 5.8 / 12.7 kg/lbs