RCF MB8N251 Mid-Bass

The MB8N251 is a 8" neodymium mid-bass driver with an excellent linearity, good efficiency and high power handling capabilities. The 2,5" aluminium voice coil combined with a high strength fibreglass former allows high efficiency and good frequency response extension. Aluminium basket and magnetic assembly design provide an excellent heat dissipation and very low power compression. The M-roll surround shape combined to spider design offer good linear displacement and precise low frequency reproduction. Features2.5-inch , fibreglass former, aluminum voice coil600 Watt continuous program power handling96 dB Sensitivity60 Hz - 3.5kHz Frequency rangeForced air ventilationM-roll surround and exponential cone geometrySpecificationsNominal Diameter: 200 / 8 mm/inchRated Impedance: 8 ΩProgram Power: 600 W AESPower handling capacity: 300 W AESSensitivity: 96 dBFrequency Range: 60 Hz · 3500 HzEffective Piston Diameter: 165 / 6.5 mm/inchMax Excursion Before Damage (peak to peak): 40 / 1.57 mm/inchMinimum Impedance: 6.0 ΩVoice Coil Diameter: 64 / 2.50 mm/inchVoice Coil Material: AluminumVoice Coil Winding Depth: 14 / 0.55 mm/inchNumber of layers: 1Kind of layer: outsideTop Plate Thickness: 9 / 0.35 mm/inchCone Material: No pressed pulpCone Design: CurvedSurround Material: PolycottonSurround Design: M - rollResonance frequency: 68 HzDC resistance: 5.1ΩMechanical factor: 4.6Electrical factor: 0.26Total factor: 0.25BL Factor: 15.2 T · mEffective Moving Mass: 27.2 gEquivalent Cas air load: 12.8 litersEffettive piston area: 0.021 m²Max. linear excursion (mathematical): 4.8 mmVoice - coil inductance @ 1kHz: 1.3 mHHalf-space efficiency: 1.70%Overall Diameter: 239 / 9.41 mm/inchBolt Circle Diameter: 221-227 / 8.70-8.93 mm/inchBolt Hole Diameter: 6.5 / 0.26 mm/inchFront Mount Baffle Cut-out: 185 / 7.28 mm/inchRear Mount Baffle Cut-out: 185 / 7.28 mm/inchDepth: 92.5 / 3.64 mm/inchVolume occupied by the driver: 0.6 / 0.02 liters/ft³Net Weight: 2.0 / 4.41 kg/lbs