CIAREFXI8
£68.59 · 70% less, betterFs81 Hz +19%, worse
Qts0.29 +7%
Vas13 L −24%, better
BL13.3 T·m +6%
Xmax4.5 mm −25%, worse
Sensitivity95.4 dB +0.7
8-inch LF driver · 8CXN series · 51 mm voice coil · 250 W
B&C 8CXN51 8Ω
8 Ω
£225.53
SteadyJP Leisure · In stock · All 4 offers
- Fs
- 68Hz
- Xmax
- 6mm
- SPL
- 95dB
- Pe
- 250W
- BL
- 12.6T·m
- Vd
- 132cm³
- Qts
- 0.27
- Vas
- 17L
Published graphs
B&C 8CXN51 is an 8-inch 8 ohm LF driver rated at 250 W RMS. The validated T/S data includes Fs 68 Hz, Qts 0.27, Vas 17 L, Xmax 6 mm, sensitivity 94.7 dB, plus 132 cm³ Vd and 234 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 £225.53.
The published T/S values agree with each other
Thiele/Small
- Fs
- 68Hz
- Qts
- 0.27
- Qes
- 0.29
- Qms
- 4.7
- Vas
- 17L
- Re
- 4.9Ω
- Le
- 0.90mH
Motor and cone
- BL
- 12.6T·m
- Sd
- 220cm²
- Mms
- 22g
- Xmax
- 6mm
- Vd †
- 132cm³
- Voice coil
- 51mm
- Flux density
- 1.15T
Power and response
- Sensitivity †
- 94.7dB
- Manufacturer sensitivity
- 97dB
- Power
- 250W
- Nominal power
- 250W
- Impedance
- 8Ω
- Min. impedance
- 6Ω
- EBP †
- 234 · Leans vented
Sensitivity shows 94.7 dB, calculated from the T/S values. B&C publishes 97.0 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
- 12.6T·m
- Fs
- 68Hz
- Le
- 0.90mH
- Re
- 4.9Ω
- Sd
- 220cm²
- Mms
- 22g
- Qes
- 0.29
- Qms
- 4.7
- Qts
- 0.27
- SPL
- 94.7dB
- Vas
- 17L
- Xmax
- 6mm
- Power
- 250W
- Impedance
- 8Ω
- Flux density
- 1.15T
- Sensitivity
- 97dB
- Nominal power
- 250W
- Calculated sensitivity †
- 94.7dB
- Manufacturer sensitivity
- 97dB
- Min. impedance
- 6Ω
- Voice coil
- 51mm
- Bl
- 12.6 Tm
- Fs
- 68 Hz
- Le
- 0.9 mH
- Re
- 4.9 Ω
- Sd
- 220 cm² (34.1 in²)
- Ebp
- 234 Hz
- Mms
- 22 g
- Qes
- 0.29
- Qms
- 4.7
- Qts
- 0.27
- Vas
- 17 dm³ (0.6 ft³)
- Η0
- 1.8 %
- Xvar
- 6 mm
- Sensitivity
- 97 dB
- Flux density
- 1.15 T
- Winding depth
- 17 mm (0.67 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
- 7.4Ω
- 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
- 7.4 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 8CXN51. Clear differences are green when better and red when worse.
This driver8CXN51
Best price
£225.53
Fs
68 Hz
Qts
0.27
Vas
17 L
BL
12.6 T·m
Xmax
6 mm
Sensitivity
94.7 dB
Power
250 W
Beyma8WRS300
£75.85 · 66% less, betterFs65 Hz −4%
Qts0.28 +4%
Vas15 L −12%, better
BL15.2 T·m +21%, better
Xmax6 mm –
Sensitivity93.4 dB −1.3
Beyma8P300FE
£79.99 · 65% less, betterFs53 Hz −22%, better
Qts0.31 +15%, worse
Vas24.8 L +46%, worse
BL11.6 T·m −8%
Xmax6 mm –
Sensitivity92.7 dB −2, worse
B&C8FMB51
£80.08 · 64% less, betterFs67 Hz –
Qts0.28 +4%
Vas20.7 L +22%, worse
BL11.3 T·m −10%, worse
Xmax5.5 mm −8%
Sensitivity95.1 dB –
Beyma8WR300
£91.29 · 60% less, betterFs65 Hz −4%
Qts0.27 –
Vas15 L −12%, better
BL15.5 T·m +23%, better
Xmax6 mm –
Sensitivity93.6 dB −1.1
B&C8FG51
£95.92 · 57% less, betterFs49 Hz −28%, better
Qts0.32 +19%, worse
Vas20 L +18%, worse
BL12.9 T·m –
Xmax6.5 mm +8%
Sensitivity90.4 dB −4.3, worse
FaitalPRO8PR210
£100.24 · 56% less, betterFs65 Hz −4%
Qts0.29 +7%
Vas15.4 L −9%
BL13.5 T·m +7%
Xmax6.9 mm +15%, better
Sensitivity93.2 dB −1.5
B&C8MBX51
£113.58 · 50% less, betterFs60 Hz −12%, better
Qts0.29 +7%
Vas23 L +35%, worse
BL11.4 T·m −10%
Xmax6 mm –
Sensitivity94.1 dB −0.6
Eighteen Sound8M400F
£114.19 · 49% less, betterFs89 Hz +31%, worse
Qts0.26 −4%
Vas13.7 L −19%, better
BL13.1 T·m +4%
Xmax3 mm −50%, worse
Sensitivity97.4 dB +2.7, better
PRV Audio8MB700FT-NDY
£127.98 · 43% less, betterFs70 Hz –
Qts0.30 +11%, worse
Vas18.8 L +11%, worse
BL12.8 T·m –
Xmax3.6 mm −39%, worse
Sensitivity94.9 dB –
MonacorSPH-225C
£130.72 · 42% less, betterFs39 Hz −43%, better
Qts0.30 +11%, worse
Vas24 L +41%, worse
BL13.2 T·m +5%
Xmax6 mm –
Sensitivity88.6 dB −6.1, worse
Sica8 FE 2.5 CP
£131.53 · 42% less, betterFs73 Hz +7%
Qts0.28 +4%
Vas15.6 L −8%
BL13.0 T·m +3%
Xmax4 mm −33%, worse
Sensitivity95.1 dB –
Eighteen Sound8NW650
£138.53 · 39% less, betterFs63 Hz −7%
Qts0.25 −7%
Vas17.8 L +5%
BL15.2 T·m +21%, better
Xmax5.5 mm −8%
Sensitivity94.2 dB −0.5
WavecorWF182BD13
£158.93 · 30% less, betterFs38 Hz −44%, better
Qts0.26 −4%
Vas20.8 L +22%, worse
BL6.9 T·m −45%, worse
Xmax5.5 mm −8%
Sensitivity88.3 dB −6.4, worse
B&C8FCX51
£178.00 · 21% less, betterFs69 Hz –
Qts0.34 +26%, worse
Vas16 L −6%
BL11.5 T·m −9%
Xmax6 mm –
Sensitivity93.7 dB −1
WavecorWF211PA02
£186.80 · 17% less, betterFs59 Hz −13%, better
Qts0.25 −7%
Vas18.2 L +7%
BL13.4 T·m +6%
Xmax2 mm −67%, worse
Sensitivity93.6 dB −1.1
FaitalPRO8HX230
£236.82 · 5% more, worseFs70 Hz –
Qts0.29 +7%
Vas14.7 L −14%, better
BL15 T·m +19%, better
Xmax6.2 mm –
Sensitivity94.1 dB −0.6
FaitalPRO8HX200
£252.95 · 12% more, worseFs76 Hz +12%, worse
Qts0.30 +11%, worse
Vas13.1 L −23%, better
BL13.8 T·m +10%
Xmax4.9 mm −18%, worse
Sensitivity94.7 dB –
FaitalPRO8HX240
£282.66 · 25% more, worseFs70 Hz –
Qts0.30 +11%, worse
Vas12.9 L −24%, better
BL13.8 T·m +10%
Xmax6.2 mm –
Sensitivity93.6 dB −1.1
Beyma8CX300ND
£321.98 · 43% more, worseFs61 Hz −10%, better
Qts0.29 +7%
Vas23 L +35%, worse
BL12 T·m −5%
Xmax6 mm –
Sensitivity94.4 dB –
Eighteen Sound8CX650
£344.69 · 53% more, worseFs65 Hz −4%
Qts0.35 +30%, worse
Vas16.6 L –
BL12 T·m −5%
Xmax6 mm –
Sensitivity92.9 dB −1.8
AccutonC173-6-096
£848.78 · 276% more, worseFs50 Hz −26%, better
Qts0.22 −19%, better
Vas17.0 L –
BL11.4 T·m −10%
Xmax5 mm −17%, worse
Sensitivity91.5 dB −3.2, worse
AccutonC220-6-222
£1,018.55 · 352% more, worseFs30 Hz −57%, better
Qts0.26 −4%
Vas74 L +335%, worse
BL11.7 T·m −7%
Xmax6 mm –
Sensitivity90.5 dB −4.2, worse
LavoceCAN082.00K
No current priceFs72 Hz +6%
Qts0.27 –
Vas15.1 L −11%, better
BL13.2 T·m +4%
Xmax6.7 mm +12%, better
Sensitivity94.8 dB –
Sica8 CX 2.5 PL P
No current priceFs74 Hz +9%
Qts0.28 +4%
Vas16.2 L −5%
BL12.3 T·m –
Xmax5 mm −17%, worse
Sensitivity95.1 dB –
Oberton8MB201
No current priceFs68 Hz –
Qts0.31 +16%, worse
Vas14.7 L −13%, better
BL12.5 T·m –
Xmax7 mm +17%, better
Sensitivity93.4 dB −1.3
Tang BandW8-740P
No current priceFs30 Hz −56%, better
Qts0.28 +4%
Vas20.0 L +18%, worse
BL13.7 T·m +8%
Xmax12.1 mm +102%, better
Sensitivity84.4 dB −10.3, worse
No photo
PHL Audio2730
No current priceFs42 Hz −38%, better
Qts0.26 −4%
Vas34.1 L +101%, worse
BL12.6 T·m –
Xmax7 mm +17%, better
Sensitivity91.7 dB −3, worse
Oberton8NB201
No current priceFs71 Hz +4%
Qts0.24 −9%
Vas12.5 L −26%, better
BL14.4 T·m +14%, better
Xmax5.3 mm −13%, worse
Sensitivity94.4 dB –
No photo
PHL Audio2440
No current priceFs77 Hz +13%, worse
Qts0.31 +15%, worse
Vas13.1 L −23%, better
BL12.8 T·m –
Xmax5 mm −17%, worse
Sensitivity94.5 dB –
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 | £225.53, the lowest price | In stock | Visit shop at JP Leisure | |
JP Leisure Not currently listed · Last seen 7 Aug 2026 | £225.53 | In stock | Visit shop at JP Leisure | |
Blue Aran 5-7 weeks | £247.16 | 9.6% above the lowest price | 4 in stock | Visit shop at Blue Aran |
Best price over time
Tracked since 1 Apr
Recent changes
- 23 JunJP Leisure£218.34 → £225.53Up 3.3% from £218.34
- 23 JunBlue Aran£247.19 → £247.16Down <0.1% from £247.19
- 5 JunBlue Aran£231.02 → £247.19Up 7.0% from £231.02