MB8N251 Mid - Bass
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.
Features
- 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
Specifications
General specifications
| Nominal Diameter |
8 inch / 203 mm |
| Rated Impedance |
8 ohm |
| Program Power (watt) |
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 |
| Minimum Impedance (ohm) |
6.0 ohm |
| Voice Coil Diameter |
2.5 inch / 63 mm |
| Voice Coil Winding Material |
Aluminum |
| 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 |
01 |
Thiele - small parameters
| Resonance frequency (Fs) |
68 Hz |
| DC resistance (Re) (ohm) |
5.10 ohm |
| Mechanical factor |
4.60 Qms |
| Electrical factor |
0.26 Qes |
| Total factor |
0.25 Qts |
| Bl factor (Bl) (T x m) |
15.20 T x m |
| Effective moving mass (Mms) |
27.0 g |
| Equivalent Cas air loaded (Vas) |
13.0 liters |
| Effective piston area (Sd) |
0.020 m2 |
| Max. linear excursion (Xmax) |
5 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
| Safety agency |
CE compliant |
Size / Weight
| Height |
102 mm / 4.02 inches |
| Diameter |
208 mm / 8.19 inches |
| Weight |
2.01 kg / 4.43 lbs |
Shipping information
| Package Height |
125 mm / 4.92 inches |
| Package Width |
235 mm / 9.25 inches |
| Package Depth |
220 mm / 8.66 inches |
| Package Weight |
2.47 kg / 5.45 lbs |
