- 2.5-inch , fibreglass 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
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.
- General specifications
- Nominal Diameter: 8 inch / 203 mm
- Rated Impedance: 8 ohm
- Program Power: 600 W
- Power handling capacity: 300 W
- Sensitivity: 96.0 dB
- Frequency range: 60 – 3500 Hz
- Effective piston diameter: 165 mm / 6.5 inch
- Max. Excursion Before Damage: 40 mm / 1.57 inch
- Minimim Impedance: 6.0 ohm
- Voice Coil Diameter: 2.5 inch / 63 mm
- Voice Coil Winding Material: Aluminium
- Voice Coil Length: 14 mm / 0.55 inch
- Number of layers: 1
- Kind of layers: outside
- Top Plate Thickness: 9 mm / 0.35 inch
- Cone Design: Curved
- Surround Material: Polycotton
- Surround Design: M-roll
- Magnets: Neodymium
- Dual-force air ventilation: Yes
- Spider: Single
- Thiele – small parameters
- Resonance frequency (Fs): 68 Hz
- DC resistance (Re): 5.10 ohm
- Mechanical factor: 4.60 Qms
- Electrical factor (Qes): 0.26 Qes
- Total factor: 0.25 Qts
- BL factor (BL): 15.20 T x m
- Effective moving mass (Mms): 27.0 g
- Equivalent Cas air loaded (Vas): 13.0 liters
- Effettive piston area (Sd): 0.020 m2
- Max. linear excursion (Xmax): 5.0 mm
- Voice coil inductance @ 1kHz (Le1k): 1.30 mH
- Half-space efficency (Eff): 1.70%
- Mounting Information
- Overall diameter: 239 mm / 9.41 inches
- Bolt circle diameter: 221-227 mm / 8.7-8.94 inch
- Bolt hole diameter: 7 mm / 0.28 inch
- Front mount baffle cut-out: 185 mm / 7.28 inch
- Rear mount baffle cut-out: 185 mm / 7.28 inch
- Volume occupied by the driver: 0.6 liters / 0.02 ft3
- Standard compliance
- CE marking: Yes
- Size
- Weight: 2.01 kg / 4.43 lbs
- Height: 102 mm / 4.02 inches
- Diameter: 208 mm / 8.19 inches
- Shipping informations
- Package Width: 235 mm / 9.25 inches
- Package Weight: 2.47 kg / 5.45 lbs
- Package Height: 125 mm / 4.92 inches
- Package Depth: 220 mm / 8.66 inches
