8FMB51

LF Driver
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Overview

LF Driver8FMB series
B&C

8FMB51

Size
8"
Impedance
16Ω
RMS Power
500W
Sensitivity
96dB
EBP
158
Vented alignment
Vd
125cm³

Frequency response

Manufacturer-provided response plots and related charts.

2 images
Response graph 1
Response graph 2

T/S Parameters

Valid
Manufacturer
Fs68Hz
Qts0.39
Qes0.43
Qms4.1
Vas20.5L
Re9.8Ω
Le0.83mH
BL13.7Tm
Sd227cm²
Mms20g
Xmax5.5mm
SPL96dB
Power500W
Power Nominal250W
Impedance16Ω
Min Impedance11.0Ω
F Low68Hz
F High4500Hz
Voice Coil51mm
Flux Density1.19T

Pricing & availability

Price movement

Best current price

Updated 17 May 2026

bluearan
£89.35
Avg £90.73£1.38 below avg (-1.5%)
inc VAT
Buy now

Dimensions & Physical

Weight3.4kg
Diameter225.0mm
Overall Depth92.0mm
Cutout Diameter187.0mm
Bolt Circle Diameter210.0mm

Additional Manufacturer Specs

Bl13.73 Tm
Fs68 Hz
Le0.83 mH
Re9.8 Ω
Sd227 cm² (35.19 in²)
Ebp158 Hz
Mms19.7 g
Qes0.43
Qms4.1
Qts0.39
Vas20.5 dm³ (0.72 ft³)
η01.4 %
ConeRCK008FMB5116
Xmax5.5 mm
Xvar5 mm
SpiderSingle
Cone ShapeCurvilinear
Pole DesignT-Pole
Winding Depth15 mm (0.59 in)
Surround ShapeTriple Roll
Former MaterialGlass Fibre
Magnet MaterialFerrite
Nominal Diameter200 mm (8 in)
Winding MaterialAluminium
Magnetic Gap Depth8 mm (0.31 in)
Recommended Tuning80 Hz
Bolt Circle Diameter210 mm (8.27 in)
Recommended Enclosure14 dm³ (0.49 ft³)
Woofer Cone TreatmentWaterproof Impregnated Cone
Baffle Cutout Diameter187 mm (7.36 in)
Flange And Gasket Thickness9 mm (0.35 in)
Air Volume Occupied By Driver1.1 dm³ (0.04 ft³)

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8FMB51
Reference
B&C
8FMB51
8"
Best current price
£89.35
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Only active params are shown here. Size stays fixed automatically.

5 active T/S params, plus size.

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