Low distortion bass
optimised for bass extension
The B251.8 features a symmetrical field magnet and long voice coil for large linear excursion capability. It also has double rear suspensions whose characteristics are matched to that of the motor assembly for stability and linearity at high drive levels. An extended centre pole is utilised to minimise distortion inducing inductance swing at high power levels. The Thiele-Small parameters are optimised for bass extension.
Key Stats
90dB/W/m
Sensitivity
24 - 1000Hz
Frequency Response
38mm
Voice Coil Diameter
B251.8 (10″) Specifications
- Nominal Diameter (mm): 250
- Power Capacity (Watt AES): 150
- Frequency Range (Hz): 24-1000
- Impedance (Ohms): 4, 8, or 16
- Magnet Gap Height (mm): 9.5
- Linear Excursion (XMax) (mm): ±5
- Maximum Excursion (mm): 25
- Volume Displacement (litres): 1.1
- Voice Coil Material: Copper
- Voice Coil Diameter (mm): 38
- Voice Coil Height (mm): 19
- Voice Coil Layers (mm): 2
- Magnet Assembly Weight (Kg): 3.6
- Connection: 5mm Solder Terminals
- Chassis: Diecast Aluminium
B251.8 (10″) Mounting Information
Parameter | Measure |
---|---|
Overall Diameter | 285mm |
Mounting Bolt Circle Diameter | 268mm |
Number and Size of Bolts | 4 M5 |
Baffle Cutout Diameter | 253mm front mount |
Baffle Cutout Diameter | 245mm rear mount |
Depth | 109.5mm below front flange |
Depth | 119mm total depth |
Weight | 4.9Kg |
B251.8 (10″) Thiele-Small Parameters
Parameter | Measure |
---|---|
Fs | 31 Hz |
Re | 5.8 Ω |
Sd | 323 cm² |
Qms | 1.82 |
Qes | 0.45 |
Qts | 0.36 |
Cms | 0.49 mm/N |
Mms | 53.67 g |
Rms | 5.74 Ωm |
Bl | 11.74 N/A |
Sensitivity (1w / 1m) | 90 dB |
Vas | 72.56 litres |
Le | 0.94mH |