- 4-inch, fibreglass inside/outside aluminium voice coil
- 2000W continuous program power handling
- 98.5 dB Sensitivity
- 50 Hz – 2 kHz Frequency range
- Dual-forced air ventilation for minimum power compression
- Triple roll surround and exponential cone geometry
The MB12N405 is a hypervented neo mid-bass design with a linear frequency response and very high efficiency. To get this performance the magnetic structure use a high flux neo disc and the cone assembly a fibre loaded exponential shape along with a high excursion triple roll, constant geometry surround. The fibreglass former and aluminium voice coil provide a very high power handling maintaining a light mass and a proper Q factor for bass alignment.
- General specifications
- Nominal Diameter: 12 inch / 305 mm
- Rated Impedance: 8 ohm
- Program Power: 2000 W
- Power handling capacity: 1000 W
- Sensitivity: 98.5 dB
- Frequency range: 50 – 2000 Hz
- Effective piston diameter: 260 mm / 10.24 inch
- Max. Excursion Before Damage: 53 mm / 2.09 inch
- Minimim Impedance: 6.6 ohm
- Voice Coil Diameter: 4.0 inch / 102 mm
- Voice Coil Winding Material: Aluminium
- Voice Coil Length: 20 mm / 0.79 inch
- Number of layers: 2
- Kind of layers: inside/outside
- Top Plate Thickness: 12 mm / 0.47 inch
- Cone Design: Curved
- Surround Material: Polycotton
- Surround Design: Triple roll
- Magnets: Neodymium
- Hypervented magnetic structure: Yes
- Spider: Single
- Thiele – small parameters
- Resonance frequency (Fs): 52 Hz
- DC resistance (Re): 5.00 ohm
- Mechanical factor: 6.00 Qms
- Electrical factor (Qes): 0.21 Qes
- Total factor: 0.20 Qts
- BL factor (BL): 23.50 T x m
- Effective moving mass (Mms): 73.0 g
- Equivalent Cas air loaded (Vas): 53.0 liters
- Effettive piston area (Sd): 0.050 m2
- Max. linear excursion (Xmax): 7.0 mm
- Voice coil inductance @ 1kHz (Le1k): 1.20 mH
- Half-space efficency (Eff): 3.31%
- Mounting Information
- Overall diameter: 320 mm / 12.6 inches
- Bolt circle diameter: 293-304 mm / 11.54-11.97 inch
- Bolt hole diameter: 7 mm / 0.28 inch
- Front mount baffle cut-out: 282 mm / 11.1 inch
- Rear mount baffle cut-out: 284 mm / 11.18 inch
- Volume occupied by the driver: 2.9 liters / 0.11 ft3
- Standard compliance
- CE marking: Yes
- Size
- Weight: 7.7 kg / 16.98 lbs
- Height: 133 mm / 5.24 inches
- Diameter: 320 mm / 12.6 inches
- Shipping informations
- Package Width: 354 mm / 13.94 inches
- Package Weight: 8.7 kg / 19.18 lbs
- Package Height: 194 mm / 7.64 inches
- Package Depth: 364 mm / 14.33 inches
