- Net volume
- 12L
- Tuning
- 74Hz
B&C gives the volume and tuning; the port is sized for the driver when you open it.
8-inch LF driver · 8FW series · 51 mm voice coil · 200 W
B&C 8FW51 8Ω
8 Ω · 70–5000 Hz
£116.87
SteadyJP Leisure · In stock · All 5 offers
- Fs
- 74Hz
- Xmax
- 6mm
- SPL
- 96dB
- Pe
- 200W
- BL
- 17.7T·m
- Vd
- 132cm³
- Qts
- 0.21
- Vas
- 12L
Published graphs
B&C 8FW51 is an 8-inch 8 ohm LF driver rated at 200 W RMS. The validated T/S data includes Fs 74 Hz, Qts 0.21, Vas 12 L, Xmax 6 mm, sensitivity 95.7 dB, plus 132 cm³ Vd and 352 EBP. bits tracks UK, EU and US shop prices, price movement, datasheet links, simulator import data, and similar drivers, with a current best price of £116.87.
The published T/S values agree with each other
Thiele/Small
- Fs
- 74Hz
- Qts
- 0.21
- Qes
- 0.21
- Qms
- 9.3
- Vas
- 12L
- Re
- 5.2Ω
- Le
- 0.56mH
Motor and cone
- BL
- 17.7T·m
- Sd
- 220cm²
- Mms
- 27g
- Xmax
- 6mm
- Vd †
- 132cm³
- Voice coil
- 51mm
- Flux density
- 1.35T
Power and response
- Sensitivity †
- 95.7dB
- Manufacturer sensitivity
- 97dB
- Power
- 200W
- Nominal power
- 200W
- Impedance
- 8Ω
- Min. impedance
- 7.4Ω
- Range
- 70–5000Hz
- EBP †
- 352 · Leans vented
Size and mounting
- Diameter
- 225mm
- Cutout
- 187mm
- Bolt circle
- 210mm
- Depth
- 100mm
- Weight
- 5.6kg
Sensitivity shows 95.7 dB, calculated from the T/S values. B&C publishes 97.0 dB, 1.3 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else B&C lists
LF
- BL
- 17.7T·m
- Fs
- 74Hz
- Le
- 0.56mH
- Re
- 5.2Ω
- Sd
- 220cm²
- Mms
- 27g
- Qes
- 0.21
- Qms
- 9.3
- Qts
- 0.21
- SPL
- 95.7dB
- Vas
- 12L
- Xmax
- 6mm
- Power
- 200W
- Impedance
- 8Ω
- Flux density
- 1.35T
- Sensitivity
- 97dB
- Low limit
- 70Hz
- Nominal power
- 200W
- Calculated sensitivity †
- 95.7dB
- High limit
- 5000Hz
- Manufacturer sensitivity
- 97dB
- Min. impedance
- 7.4Ω
- Voice coil
- 51mm
- Weight
- 5.6kg
- Diameter
- 225mm
- Depth
- 100mm
- Cutout
- 187mm
- Bolt circle
- 210mm
- Bl
- 17.7 Tm
- Fs
- 74 Hz
- Le
- 0.56 mH
- Re
- 5.2 Ω
- Sd
- 220 cm² (34.1 in²)
- Ebp
- 352 Hz
- Mms
- 27 g
- Qes
- 0.21
- Qms
- 9.3
- Qts
- 0.21
- Vas
- 12 dm³ (0.42 ft³)
- Η0
- 2.1 %
- Cone
- RCK008FW518
- Xmax
- 6 mm
- Xvar
- 5 mm
- Depth
- 100 mm (3.94 in)
- Spider
- Single
- Cone shape
- Exponential
- Net weight
- 5.6 kg (12.35 lb)
- Pole design
- T-Pole
- Sensitivity
- 97 dB
- Flux density
- 1.35 T
- Shipping box
- 255x255x150 mm (10.04x10.04x5.91 in)
- Winding depth
- 17 mm (0.65 in)
- Shipping units
- 1 pcs
- Surround shape
- Double Roll
- Former material
- Kapton
- Frequency range
- 70 Hz - 5000 Hz
- Magnet material
- Ferrite
- Shipping weight
- 6.05 kg (13.34 lb)
- Nominal diameter
- 200 mm (8 in)
- Overall diameter
- 225 mm (8.8 in)
- Winding material
- Copper
- Minimum impedance
- 7.4 Ω
- Nominal impedance
- 8 Ω
- Magnetic gap depth
- 10 mm (0.4 in)
- Recommended tuning
- 74 Hz
- Voice coil diameter
- 51 mm (2 in)
- Bolt circle diameter
- 210 mm (8.3 in)
- Recommended enclosure
- 12 dm³ (0.42 ft³)
- Woofer cone treatment
- TWP Waterproof Both Sides
- Baffle cutout diameter
- 187 mm (7.4 in)
- Nominal power handling
- 200 W
- Continuous power handling
- 400 W
- Flange and gasket thickness
- 9 mm (0.35 in)
- Air volume occupied by driver
- 1.5 dm³ (0.05 ft³)
B&C’s suggested box
From B&C’s 8FW51 page
Open this box in 00 Simulator
Modelling the box in 00 Simulator…
03
Compare
Same-size drivers, compared with the 8FW51. Clear differences are green when better and red when worse.
This driver8FW51
Best price
£116.87
Fs
74 Hz
Qts
0.21
Vas
12 L
BL
17.7 T·m
Xmax
6 mm
Sensitivity
95.7 dB
Power
200 W
LavoceMAF082.00
£74.52 · 36% less, betterFs85 Hz +15%, worse
Qts0.20 −5%
Vas11.3 L −6%
BL17.2 T·m –
Xmax2.6 mm −57%, worse
Sensitivity97 dB +1.3
Beyma8WRS300
£75.41 · 35% less, betterFs65 Hz −12%, better
Qts0.28 +33%, worse
Vas15 L +25%, worse
BL15.2 T·m −14%, worse
Xmax6 mm –
Sensitivity93.4 dB −2.3, worse
SB AudienceBIANCO-8MWN150
£81.76 · 30% less, betterFs74 Hz –
Qts0.38 +81%, worse
Vas9.9 L −17%, better
BL16.5 T·m −7%
Xmax6.0 mm –
Sensitivity92 dB −3.7, worse
Beyma8WR300
£90.05 · 23% less, betterFs65 Hz −12%, better
Qts0.27 +29%, worse
Vas15 L +25%, worse
BL15.5 T·m −12%, worse
Xmax6 mm –
Sensitivity93.6 dB −2.1, worse
B&C8PE21
£95.00 · 19% less, betterFs87 Hz +18%, worse
Qts0.19 −10%
Vas13 L +8%
BL16.6 T·m −6%
Xmax2.5 mm −58%, worse
Sensitivity98.3 dB +2.6, better
B&C8NW51
£120.85 · 3% moreFs74 Hz –
Qts0.17 −19%, better
Vas11 L −8%
BL18.9 T·m +7%
Xmax6 mm –
Sensitivity95.7 dB –
B&C8NDL64
£122.00 · 4% moreFs80 Hz +8%
Qts0.25 +19%, worse
Vas9.6 L −20%, better
BL17.5 T·m –
Xmax4.5 mm −25%, worse
Sensitivity95 dB −0.7
B&C8MDN51
£136.46 · 17% more, worseFs70 Hz −5%
Qts0.20 −5%
Vas16 L +33%, worse
BL15.3 T·m −14%, worse
Xmax6 mm –
Sensitivity96.2 dB +0.5
Eighteen Sound8NTLW2000
£137.32 · 17% more, worseFs71 Hz −4%
Qts0.21 –
Vas13 L +8%
BL17.5 T·m –
Xmax4.4 mm −27%, worse
Sensitivity95.5 dB –
LavoceWAN082.02
£147.03 · 26% more, worseFs80 Hz +8%
Qts0.23 +10%
Vas9.0 L −25%, better
BL17.8 T·m –
Xmax5.8 mm −3%
Sensitivity94.7 dB −1
RCFMB8N251
£149.04 · 28% more, worseFs68 Hz −8%
Qts0.25 +19%, worse
Vas13 L +8%
BL15.2 T·m −14%, worse
Xmax5 mm −17%, worse
Sensitivity94 dB −1.7
Scanspeak18W/8545-01
£149.18 · 28% more, worseFs25 Hz −66%, better
Qts0.20 −5%
Vas68.6 L +472%, worse
BL8.4 T·m −53%, worse
Xmax6.5 mm +8%
Sensitivity88.9 dB −6.8, worse
Sica8 K 3 PL
£158.25 · 35% more, worseFs68 Hz −8%
Qts0.25 +19%, worse
Vas12.2 L –
BL16.1 T·m −9%
Xmax5 mm −17%, worse
Sensitivity93.6 dB −2.1, worse
Beyma8MC500ND
£159.93 · 37% more, worseFs69 Hz −7%
Qts0.18 −14%, better
Vas15.9 L +33%, worse
BL16.7 T·m −6%
Xmax5 mm −17%, worse
Sensitivity96.4 dB +0.7
Eighteen Sound8NTLS2000
£162.28 · 39% more, worseFs41 Hz −45%, better
Qts0.19 −10%
Vas27 L +125%, worse
BL17.2 T·m –
Xmax7.4 mm +23%, better
Sensitivity91.9 dB −3.8, worse
Beyma8MC300ND
£175.84 · 50% more, worseFs62 Hz −16%, better
Qts0.22 +5%
Vas18 L +50%, worse
BL16 T·m −10%
Xmax6 mm –
Sensitivity94.6 dB −1.1
Eighteen Sound8NMB750
£214.35 · 83% more, worseFs88 Hz +19%, worse
Qts0.27 +29%, worse
Vas6.9 L −43%, better
BL18.7 T·m +6%
Xmax6.1 mm –
Sensitivity94.3 dB −1.4
FaitalPRO8HX230
£233.61 · 100% more, worseFs70 Hz −5%
Qts0.29 +38%, worse
Vas14.7 L +22%, worse
BL15 T·m −15%, worse
Xmax6.2 mm –
Sensitivity94.1 dB −1.6
FaitalPRO8HX240
£278.82 · 139% more, worseFs70 Hz −5%
Qts0.30 +43%, worse
Vas12.9 L +8%
BL13.8 T·m −22%, worse
Xmax6.2 mm –
Sensitivity93.6 dB −2.1, worse
AccutonC173-6-096
£837.27 · 616% more, worseFs50 Hz −32%, better
Qts0.22 +5%
Vas17.0 L +42%, worse
BL11.4 T·m −36%, worse
Xmax5 mm −17%, worse
Sensitivity91.5 dB −4.2, worse
LavoceWAF082.01
No current priceFs76 Hz –
Qts0.21 –
Vas10.2 L −15%, better
BL17.9 T·m –
Xmax5.8 mm −3%
Sensitivity95.1 dB −0.6
CelestionNTR08-2009D
No current priceFs71 Hz −4%
Qts0.21 –
Vas11.7 L –
BL18.0 T·m –
Xmax6.5 mm +8%
Sensitivity94.6 dB −1.1
B&C8CLA64
No current priceFs71 Hz −4%
Qts0.24 +14%, worse
Vas12.5 L +4%
BL16.4 T·m −7%
Xmax5.3 mm −12%, worse
Sensitivity94.6 dB −1.1
Oberton8NB201
No current priceFs71 Hz −5%
Qts0.24 +17%, worse
Vas12.5 L +4%
BL14.4 T·m −19%, worse
Xmax5.3 mm −13%, worse
Sensitivity94.4 dB −1.3
Oberton8M250
No current priceFs74 Hz –
Qts0.20 −4%
Vas15.6 L +30%, worse
BL13.7 T·m −23%, worse
Xmax2.8 mm −54%, worse
Sensitivity97 dB +1.3
REDCATT81NPM-1
No current priceFs72 Hz –
Qts0.33 +57%, worse
Vas10.3 L −14%, better
BL16.7 T·m −6%
Xmax6 mm –
Sensitivity92.6 dB −3.1, worse
Oberton8MVCX (8NMB250VCX)
No current priceFs85 Hz +15%, worse
Qts0.16 −22%, better
Vas10.7 L −11%, better
BL17.8 T·m –
Xmax4.3 mm −29%, worse
Sensitivity98 dB +2.3, better
No photo
PHL Audio2513NDU
No current priceFs70 Hz −5%
Qts0.23 +10%
Vas12.5 L +4%
BL24 T·m +36%, better
Xmax4 mm −33%, worse
Sensitivity94.5 dB −1.2
No photo
PHL Audio2513NDS
No current priceFs71 Hz −4%
Qts0.18 −14%, better
Vas12.2 L –
BL27.5 T·m +55%, better
Xmax4 mm −33%, worse
Sensitivity95.6 dB –
B&C8CXN64
No current priceFs71 Hz −4%
Qts0.33 +57%, worse
Vas10.5 L −13%, better
BL15.5 T·m −12%, worse
Xmax5.5 mm −8%
Sensitivity92.3 dB −3.4, worse
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
| Shop | Price | Against the lowest | Stock | Link |
|---|---|---|---|---|
JP Leisure | £116.87, the lowest price | In stock | Visit shop at JP Leisure | |
JP Leisure Not currently listed · Last seen 7 Aug 2026 | £116.87 | In stock | Visit shop at JP Leisure | |
Blue Aran 4-6 weeks | £121.10 | 3.6% above the lowest price | Usually available in 4-6 weeks | Visit shop at Blue Aran |
Best price over time
Tracked since 1 Apr
Recent changes
- 23 JunJP Leisure£114.11 → £116.87Up 2.4% from £114.11
- 23 JunBlue Aran£121.16 → £121.10Down <0.1% from £121.16
- 5 JunBlue Aran£114.06 → £121.16Up 6.2% from £114.06