Speaker 8", 300W, 96dB, 60-3500Hz, X-max 4.8mm, weight 2kg The MB8N251 is an 8” neodymium mid-bass driver known for its exceptional linearity, high efficiency, and robust power handling capabilities. Featuring a 2.5” aluminum voice coil and a high-strength fiberglass former, it delivers high efficiency and extends frequency response. The aluminum basket and magnetic assembly design ensure excellent heat dissipation and minimal power compression. The M-roll surround shape and spider design provide precise low-frequency reproduction and linear displacement. Features: - 2.5-inch fiberglass former, aluminum voice coil - 600 Watt continuous program power handling - 96 dB Sensitivity - 60 Hz - 3.5kHz Frequency range - Forced air ventilation - M-roll surround and exponential cone geometry General Specifications: - Nominal Diameter: 200 / 8 mm/inch - Rated Impedance: 8 ohm - Program Power: 600 W AES - Power handling capacity: 300 W AES - Sensitivity: 96 dB - Frequency Range: 60 Hz ÷ 3500 Hz - Effective Piston Diameter: 165 / 6.5 mm/inch - Max Excursion Before Damage (peak to peak): 40 / 1.57 mm/inch - Minimum Impedance: 6.0 ohm - Voice Coil Diameter: 64 / 2.50 mm/inch - Voice Coil Material: Aluminum - Voice Coil Winding Depth: 14 / 0.55 mm/inch - Number of layers: 1 Kind of layer: outside - Top Plate Thickness: 9 / 0.35 mm/inch - Cone Material: No pressed pulp - Cone Design: Curved - Surround Material: Polycotton - Surround Design: M-roll Thiele/Small Parameters: - Resonance frequency: 68 Hz - DC resistance: 5.1ohm - Mechanical factor: 4.6 - Electrical factor: 0.26 - Total factor: 0.25 - BL Factor: 15.2 T · m - Effective Moving Mass: 27.2 g - Equivalent Cas air load: 12.8 liters - Effective piston area: 0.021 m2 - Max. linear excursion (mathematical): 4.8 mm - Voice-coil inductance @ 1kHz: 1.3 mH - Half-space efficiency: 1.70% Mounting information: - Overall Diameter: 239 / 9.41 mm/inch - Bolt Circle Diameter: 221-227 / 8.70-8.93 mm/inch - Bolt Hole Diameter: 6.5 / 0.26 mm/inch - Front Mount Baffle Cut-out: 185 / 7.28 mm/inch - Rear Mount Baffle Cut-out: 185 / 7.28 mm/inch - Depth: 92.5 / 3.64 mm/inch - Volume occupied by the driver: 0.6 / 0.02 liters/ft3 - Net Weight: 2.0 / 4.41 kg/lbs Shipping information: - Shipping weight: 2.2 / 4.85 kg/lbs