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Description
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
- 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
Specifications
| 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 |