- 2.5-inch , fibreglass former, aluminum voice coil
- 600 Watt continuous program power handling
- 98 dB Sensitivity
- 45 Hz – 3.0 kHz Frequency range
- Forced air ventilation
- M-roll surround and exponential cone geometry
The MB12N251 is a 12” 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 Triple-roll shape combined to spider design offer very low distortion and extended low frequency reproduction.
- General specifications
- Nominal Diameter: 12 inch / 305 mm
- Rated Impedance: 8 ohm
- Program Power: 600 W
- Power handling capacity: 300 W
- Sensitivity: 98.0 dB
- Frequency range: 45 – 3000 Hz
- Effective piston diameter: 260 mm / 10.24 inch
- Max. Excursion Before Damage: 38 mm / 1.5 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: Triple roll
- Magnets: Neodymium
- Dual-force air ventilation: Yes
- Spider: Single
- Thiele – small parameters
- Resonance frequency (Fs): 50 Hz
- DC resistance (Re): 5.10 ohm
- Mechanical factor: 5.40 Qms
- Electrical factor (Qes): 0.36 Qes
- Total factor: 0.34 Qts
- BL factor (BL): 15.00 T x m
- Effective moving mass (Mms): 49.0 g
- Equivalent Cas air loaded (Vas): 83.0 liters
- Effettive piston area (Sd): 0.500 m2
- Max. linear excursion (Xmax): 5.0 mm
- Voice coil inductance @ 1kHz (Le1k): 1.30 mH
- Half-space efficency (Eff): 2.70%
- Mounting Information
- Overall diameter: 320 mm / 12.6 inches
- Bolt circle diameter: 295-304 mm / 11.61-11.97 inch
- Bolt hole diameter: 6 mm / 0.24 inch
- Front mount baffle cut-out: 288 mm / 11.34 inch
- Rear mount baffle cut-out: 288 mm / 11.34 inch
- Volume occupied by the driver: 2.2 liters / 0.09 ft3
- Standard compliance
- CE marking: Yes
- Size
- Weight: 2.58 kg / 5.69 lbs
- Height: 143 mm / 5.63 inches
- Diameter: 320 mm / 12.6 inches
- Shipping informations
- Package Width: 364 mm / 14.33 inches
- Package Weight: 3.67 kg / 8.09 lbs
- Package Height: 194 mm / 7.64 inches
- Package Depth: 354 mm / 13.94 inches
