Overview4-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 Specifications
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.
Features General specifications
Nominal Diameter : 12 inch / 305 mm
Rated Impedance : 8 ohm
Program Power (watt) : 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
Minimum Impedance (ohm) : 6.6 ohm
Voice Coil Diameter : 4.0 inch / 102 mm
Voice Coil Winding Material : Aluminum
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 : 01
Thiele - small parameters
Resonance frequency (Fs) : 52 Hz
DC resistance (Re) (ohm) : 5.00 ohm
Mechanical factor : 6.00 Qms
Electrical factor : 0.21 Qes
Total factor : 0.20 Qts
Bl factor (Bl) (T x m) : 23.50 T x m
Effective moving mass (Mms) : 73.0 g
Equivalent Cas air loaded (Vas) : 53.0 liters
Effective piston area (Sd) : 0.050 m2
Max. linear excursion (Xmax) : 7 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
Safety agency : CE compliant
Size / Weight
Height : 133 mm / 5.24 inches
Diameter : 320 mm / 12.6 inches
Weight : 7.7 kg / 16.98 lbs
Shipping information
Package Height : 194 mm / 7.64 inches
Package Width : 354 mm / 13.94 inches
Package Depth : 364 mm / 14.33 inches
Package Weight : 8.7 kg / 19.18 lbs
