CelestionTRUVOX 0820
£59.70 · 68% less, betterFs74 Hz +7%
Qts0.39 +15%, worse
Vas17.3 L +8%
BL11.5 T·m –
Xmax5 mm −17%, worse
Sensitivity94.3 dB +0.6
8-inch LF driver · 8FCX series · 51 mm voice coil · 250 W
B&C 8FCX51 8Ω
8 Ω
£186.30
4.7%JP Leisure · In stock · All 3 offers
- Fs
- 69Hz
- Xmax
- 6mm
- SPL
- 94dB
- Pe
- 250W
- BL
- 11.5T·m
- Vd
- 132cm³
- Qts
- 0.34
- Vas
- 16L
Published graphs
B&C 8FCX51 is an 8-inch 8 ohm LF driver rated at 250 W RMS. The validated T/S data includes Fs 69 Hz, Qts 0.34, Vas 16 L, Xmax 6 mm, sensitivity 93.7 dB, plus 132 cm³ Vd and 192 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 £186.30.
The published T/S values agree with each other
Thiele/Small
- Fs
- 69Hz
- Qts
- 0.34
- Qes
- 0.36
- Qms
- 6.3
- Vas
- 16L
- Re
- 4.9Ω
- Le
- 0.90mH
Motor and cone
- BL
- 11.5T·m
- Sd
- 220cm²
- Mms
- 22g
- Xmax
- 6mm
- Vd †
- 132cm³
- Voice coil
- 51mm
- Flux density
- 1T
Power and response
- Sensitivity †
- 93.7dB
- Manufacturer sensitivity
- 96dB
- Power
- 250W
- Nominal power
- 250W
- Impedance
- 8Ω
- Min. impedance
- 6Ω
- EBP †
- 192 · Leans vented
Sensitivity shows 93.7 dB, calculated from the T/S values. B&C publishes 96.0 dB, 2.3 dB apart.
Excursion and motor values come from the LF section; the frequency range spans every section.
† Calculated by bits from the published values
What this validation status means
Components and manufacturer details
LF · Specifications LF unit
- BL
- 11.5T·m
- Fs
- 69Hz
- Le
- 0.90mH
- Re
- 4.9Ω
- Sd
- 220cm²
- Mms
- 22g
- Qes
- 0.36
- Qms
- 6.3
- Qts
- 0.34
- SPL
- 93.7dB
- Vas
- 16L
- Xmax
- 6mm
- Power
- 250W
- Impedance
- 8Ω
- Flux density
- 1T
- Sensitivity
- 96dB
- Nominal power
- 250W
- Calculated sensitivity †
- 93.7dB
- Manufacturer sensitivity
- 96dB
- Min. impedance
- 6Ω
- Voice coil
- 51mm
- Bl
- 11.5 Tm
- Fs
- 69 Hz
- Le
- 0.9 mH
- Re
- 4.9 Ω
- Sd
- 220 cm² (34.1 in²)
- Ebp
- 192 Hz
- Mms
- 22 g
- Qes
- 0.36
- Qms
- 6.3
- Qts
- 0.34
- Vas
- 16 dm³ (0.56 ft³)
- Η0
- 1.4 %
- Xvar
- 6 mm
- Sensitivity
- 96 dB
- Flux density
- 1 T
- Winding depth
- 17.5 mm (0.69 in)
- Former material
- Glass Fibre
- Nominal diameter
- 210 mm (8 in)
- Winding material
- Aluminium
- Minimum impedance
- 6 Ω
- Nominal impedance
- 8 Ω
- Magnetic gap depth
- 8 mm (0.31 in)
- Voice coil diameter
- 51 mm (2 in)
- Woofer cone treatment
- WP Waterproof Front Side
- Nominal power handling
- 250 W
- Continuous power handling
- 500 W
HF · Specifications HF unit
- Le
- 0.11mH
- SPL
- 104dB
- Power
- 50W
- Impedance
- 8Ω
- Flux density
- 1.80T
- Sensitivity
- 104dB
- Nominal power
- 50W
- Manufacturer sensitivity
- 104dB
- Min. impedance
- 7Ω
- Voice coil
- 44mm
- Crossover
- 1800Hz
- Inductance
- 0.11 mH
- Sensitivity
- 104 dB
- Flux density
- 1.8 T
- Nominal diameter
- 210 mm (8 in)
- Winding material
- Aluminium
- Minimum impedance
- 7 Ω
- Nominal impedance
- 8 Ω
- Diaphragm material
- Polyimide
- Voice coil diameter
- 44 mm (1.7 in)
- Recommended crossover
- 1.8 kHz
- Nominal power handling
- 50 W
- Continuous power handling
- 100 W
02
Compare
Same-size drivers, compared with the 8FCX51. Clear differences are green when better and red when worse.
This driver8FCX51
Best price
£186.30
Fs
69 Hz
Qts
0.34
Vas
16 L
BL
11.5 T·m
Xmax
6 mm
Sensitivity
93.7 dB
Power
250 W
MonacorSP-8/150PRO
£59.78 · 68% less, betterFs56 Hz −19%, better
Qts0.32 −6%
Vas22 L +38%, worse
BL12.0 T·m +4%
Xmax6 mm –
Sensitivity91.8 dB −1.9
PRV Audio8MR600X-4
£67.26 · 64% less, betterFs77 Hz +12%, worse
Qts0.34 –
Vas19.6 L +23%, worse
BL8.9 T·m −22%, worse
Xmax5.1 mm −15%, worse
Sensitivity96 dB +2.3, better
LavoceWAF082.00
£71.42 · 62% less, betterFs78 Hz +13%, worse
Qts0.37 +9%
Vas11.9 L −26%, better
BL12.5 T·m +9%
Xmax6.3 mm +5%
Sensitivity93.4 dB –
FaitalPRO8PR200
£73.79 · 60% less, betterFs58 Hz −16%, better
Qts0.37 +9%
Vas16.9 L +6%
BL11.5 T·m –
Xmax8.2 mm +36%, better
Sensitivity91.4 dB −2.3, worse
Beyma8P300FE
£79.99 · 57% less, betterFs53 Hz −23%, better
Qts0.31 −9%
Vas24.8 L +55%, worse
BL11.6 T·m –
Xmax6 mm –
Sensitivity92.7 dB −1
Sica8 S 2.5 CP
£80.30 · 57% less, betterFs54 Hz −22%, better
Qts0.33 –
Vas18.6 L +16%, worse
BL11.9 T·m +3%
Xmax5 mm −17%, worse
Sensitivity91 dB −2.7, worse
B&C8PS21
£91.27 · 51% less, betterFs73 Hz +6%
Qts0.33 –
Vas14 L −13%, better
BL12.6 T·m +10%
Xmax5 mm −17%, worse
Sensitivity93.8 dB –
B&C8FG51
£99.64 · 47% less, betterFs49 Hz −29%, better
Qts0.32 −6%
Vas20 L +25%, worse
BL12.9 T·m +12%, better
Xmax6.5 mm +8%
Sensitivity90.4 dB −3.3, worse
Beyma8G40
£100.07 · 46% less, betterFs70 Hz –
Qts0.36 +6%
Vas17 L +6%
BL12.2 T·m +6%
Xmax6.5 mm +8%
Sensitivity93.9 dB –
B&C8NDL51
£102.00 · 45% less, betterFs66 Hz −4%
Qts0.37 +9%
Vas14 L −13%, better
BL12.4 T·m +8%
Xmax7 mm +17%, better
Sensitivity91.9 dB −1.8
FaitalPRO8RS250
£102.76 · 45% less, betterFs56 Hz −19%, better
Qts0.32 −6%
Vas18.3 L +14%, worse
BL13.5 T·m +17%, better
Xmax6.9 mm +15%, better
Sensitivity91.8 dB −1.9
CIARENDI8
£103.24 · 45% less, betterFs81 Hz +17%, worse
Qts0.33 –
Vas13 L −19%, better
BL12.8 T·m +11%, better
Xmax4.5 mm −25%, worse
Sensitivity94.9 dB +1.2
Sica8 FE 2 CP
£104.62 · 44% less, betterFs67 Hz –
Qts0.32 −6%
Vas16.9 L +6%
BL12.3 T·m +7%
Xmax4.5 mm −25%, worse
Sensitivity93.4 dB –
B&C8BG51
£110.00 · 41% less, betterFs52 Hz −25%, better
Qts0.40 +18%, worse
Vas18 L +13%, worse
BL11.8 T·m –
Xmax6.5 mm +8%
Sensitivity89.8 dB −3.9, worse
WavecorSW178WA01
£120.66 · 35% less, betterFs38 Hz −45%, better
Qts0.36 +7%
Vas12.2 L −24%, better
BL12 T·m +4%
Xmax5 mm −17%, worse
Sensitivity84.6 dB −9.1, worse
VisatonGF 200
£132.67 · 29% less, betterFs30 Hz −57%, better
Qts0.34 –
Vas68 L +325%, worse
BL9.2 T·m −20%, worse
Xmax6 mm –
Sensitivity89 dB −4.7, worse
B&C8CX21
£151.61 · 19% less, betterFs74 Hz +7%
Qts0.36 +6%
Vas15 L −6%
BL11.5 T·m –
Xmax5.5 mm −8%
Sensitivity94 dB –
SB AudienceNERO-8MWN400D
£152.56 · 18% less, betterFs63 Hz −9%
Qts0.38 +12%, worse
Vas13.9 L −13%, better
BL11.9 T·m +3%
Xmax6.7 mm +12%, better
Sensitivity91.3 dB −2.4, worse
Eighteen Sound8CX401F
£199.68 · 7% more, worseFs56 Hz −19%, better
Qts0.34 –
Vas23.9 L +49%, worse
BL9.3 T·m −19%, worse
Xmax5.8 mm −3%
Sensitivity92.5 dB −1.2
B&C8CXN51
£224.40 · 20% more, worseFs68 Hz –
Qts0.27 −21%, better
Vas17 L +6%
BL12.6 T·m +10%
Xmax6 mm –
Sensitivity94.7 dB +1
Eighteen Sound8CX650
£344.69 · 85% more, worseFs65 Hz −6%
Qts0.35 –
Vas16.6 L +4%
BL12 T·m +4%
Xmax6 mm –
Sensitivity92.9 dB −0.8
LavoceCAF082.00K
No current priceFs72 Hz +4%
Qts0.34 –
Vas15.1 L −6%
BL11.7 T·m –
Xmax6.7 mm +12%, better
Sensitivity93.7 dB –
SB AudienceROSSO-8CX250
No current priceFs70 Hz –
Qts0.32 −6%
Vas15.8 L –
BL11.4 T·m –
Xmax5.4 mm −10%
Sensitivity93.7 dB –
No photo
PHL Audio2420
No current priceFs72 Hz +4%
Qts0.33 –
Vas13.3 L −17%, better
BL12.9 T·m +12%, better
Xmax5.5 mm −8%
Sensitivity93.3 dB –
Oberton8MB201
No current priceFs68 Hz –
Qts0.31 −8%
Vas14.7 L −8%
BL12.5 T·m +9%
Xmax7 mm +17%, better
Sensitivity93.4 dB –
Beyma8CFX260ND
No current priceFs100 Hz +45%, worse
Qts0.35 –
Vas8 L −50%, better
BL13.5 T·m +17%, better
Xmax6 mm –
Sensitivity95.4 dB +1.7
JensenBS8N250A-8
No current priceFs59 Hz −14%, better
Qts0.37 +9%
Vas14.9 L −7%
BL12.8 T·m +12%, better
Xmax5 mm −17%, worse
Sensitivity91 dB −2.7, worse
Sica8 L 2 SL
No current priceFs64 Hz −7%
Qts0.32 −6%
Vas18.2 L +14%, worse
BL12.3 T·m +7%
Xmax3.5 mm −42%, worse
Sensitivity93.3 dB –
No photo
PHL Audio2440
No current priceFs77 Hz +12%, worse
Qts0.31 −9%
Vas13.1 L −18%, better
BL12.8 T·m +11%, better
Xmax5 mm −17%, worse
Sensitivity94.5 dB +0.8
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 | £186.30, the lowest price | In stock | Visit shop at JP Leisure | |
Blue Aran 4-6 weeks | £178.00 | Usually available in 4-6 weeks | Visit shop at Blue Aran | |
JP Leisure Not currently listed · Last seen 7 Aug 2026 | £186.30 | In stock | Visit shop at JP Leisure |
Best price over time
Tracked since 1 Apr
Recent changes
- 17 JulBlue Aran£201.67 → £178.00Down 12% from £201.67
- 23 JunBlue Aran£201.68 → £201.67Down <0.1% from £201.68
- 23 JunJP Leisure£173.12 → £186.30Up 7.6% from £173.12