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Description
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 |