- Net volume
- 14L
- Tuning
- 65Hz
B&C gives the volume and tuning; the port is sized for the driver when you open it.
8-inch LF driver · 8NDL series · 51 mm voice coil · 200 W
B&C 8NDL51 4Ω
75–3000 Hz
£103.00
1.0%Thomann · In stock · All 3 offers
- Fs
- 75Hz
- Xmax
- 7mm
- SPL
- 90dB
- Pe
- 200W
- BL
- 7.3T·m
- Vd
- 154cm³
- Qts
- 0.57
- Vas
- 10L
Published graphs
B&C 8NDL51 is an 8-inch 4 ohm LF driver rated at 200 W RMS. The validated T/S data includes Fs 75 Hz, Qts 0.57, Vas 10.1 L, Xmax 7 mm, sensitivity 90.3 dB, plus 154 cm³ Vd and 117 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 £100.16.
The published T/S values agree with each other
Thiele/Small
- Fs
- 75Hz
- Qts
- 0.57
- Qes
- 0.64
- Qms
- 5.2
- Vas
- 10.1L
- Re
- 2.6Ω
- Le
- 0.15mH
Motor and cone
- BL
- 7.3T·m
- Sd
- 220cm²
- Mms
- 27g
- Xmax
- 7mm
- Vd †
- 154cm³
- Voice coil
- 51mm
- Flux density
- 1.05T
Power and response
- Sensitivity †
- 90.3dB
- Manufacturer sensitivity
- 94dB
- Power
- 200W
- Nominal power
- 200W
- Impedance
- 4Ω
- Min. impedance
- 3Ω
- Range
- 75–3000Hz
- EBP †
- 117 · Leans vented
Size and mounting
- Diameter
- 225mm
- Cutout
- 187mm
- Bolt circle
- 210mm
- Depth
- 90mm
- Weight
- 1.9kg
Sensitivity shows 90.3 dB, calculated from the T/S values. B&C publishes 94.0 dB, 3.7 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else B&C lists
LF
- BL
- 7.3T·m
- Fs
- 75Hz
- Le
- 0.15mH
- Re
- 2.6Ω
- Sd
- 220cm²
- Mms
- 27g
- Qes
- 0.64
- Qms
- 5.2
- Qts
- 0.57
- SPL
- 90.3dB
- Vas
- 10.1L
- Xmax
- 7mm
- Power
- 200W
- Impedance
- 4Ω
- Flux density
- 1.05T
- Sensitivity
- 94dB
- Low limit
- 75Hz
- Nominal power
- 200W
- Calculated sensitivity †
- 90.3dB
- High limit
- 3000Hz
- Manufacturer sensitivity
- 94dB
- Min. impedance
- 3Ω
- Voice coil
- 51mm
- Weight
- 1.9kg
- Diameter
- 225mm
- Depth
- 90mm
- Cutout
- 187mm
- Bolt circle
- 210mm
- Bl
- 7.3 Tm
- Fs
- 75 Hz
- Le
- 0.15 mH
- Re
- 2.6 Ω
- Sd
- 220 cm² (34.1 in²)
- Ebp
- 117 Hz
- Mms
- 27 g
- Qes
- 0.64
- Qms
- 5.22
- Qts
- 0.57
- Vas
- 10.1 dm³ (0.36 ft³)
- Η0
- 0.73 %
- Cone
- RCK008NDL514
- Xmax
- 7 mm
- Xvar
- 7 mm
- Depth
- 90 mm (3.5 in)
- Spider
- Single
- Cone shape
- Exponential
- Net weight
- 1.85 kg (4.08 lb)
- Pole design
- Straight Pole
- Sensitivity
- 94 dB
- Flux density
- 1.05 T
- Shipping box
- 255x255x150 mm (10.04x10.04x5.91 in)
- Winding depth
- 16 mm (0.63 in)
- Shipping units
- 1 pcs
- Surround shape
- Double Roll
- Former material
- Glass Fibre
- Frequency range
- 75 Hz - 3000 Hz
- Magnet material
- Neodymium Inside Slug
- Shipping weight
- 2.3 kg (5.07 lb)
- Nominal diameter
- 200 mm (8 in)
- Overall diameter
- 225 mm (8.8 in)
- Winding material
- Copper
- Minimum impedance
- 3 Ω
- Nominal impedance
- 4 Ω
- Magnetic gap depth
- 8 mm (0.31 in)
- Recommended tuning
- 65 Hz
- Voice coil diameter
- 51 mm (2 in)
- Bolt circle diameter
- 210 mm (8.3 in)
- Recommended enclosure
- 14 dm³ (0.49 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
- 11 mm (0.4 in)
- Air volume occupied by driver
- 1.1 dm³ (0.04 ft³)
B&C’s suggested box
From B&C’s 8NDL51 page
Open this box in 00 Simulator
Modelling the box in 00 Simulator…
03
Compare
Same-size drivers, compared with the 8NDL51. Clear differences are green when better and red when worse.
This driver8NDL51
Best price
£100.16
Fs
75 Hz
Qts
0.57
Vas
10.1 L
BL
7.3 T·m
Xmax
7 mm
Sensitivity
90.3 dB
Power
200 W
GRS8FR-8
£17.78 · 82% less, betterFs45 Hz −40%, better
Qts0.56 –
Vas37.0 L +266%, worse
BL8.5 T·m +17%, better
Xmax3 mm −57%, worse
Sensitivity89.3 dB −1
GRS8PT-8
£24.85 · 75% less, betterFs59 Hz −21%, better
Qts0.55 −4%
Vas20.1 L +99%, worse
BL10.2 T·m +40%, better
Xmax6.5 mm −7%
Sensitivity90.5 dB –
REDCATT81FHW
£28.86 · 71% less, betterFs39 Hz −48%, better
Qts0.52 −9%
Vas21.5 L +113%, worse
BL8.3 T·m +13%, better
Xmax6.1 mm −13%, worse
Sensitivity85.5 dB −4.8, worse
Dayton AudioDA175-8
£30.11 · 70% less, betterFs39 Hz −48%, better
Qts0.58 –
Vas16.3 L +61%, worse
BL7.2 T·m –
Xmax4.3 mm −39%, worse
Sensitivity83.4 dB −6.9, worse
PRV Audio8MR450A
£33.83 · 66% less, betterFs65 Hz −13%, better
Qts0.55 −4%
Vas34.9 L +245%, worse
BL7.6 T·m +4%
Xmax4 mm −43%, worse
Sensitivity94.3 dB +4, better
SB AudienceBIANCO-8MW125
£37.54 · 63% less, betterFs89 Hz +19%, worse
Qts0.55 −4%
Vas10.1 L –
BL11.3 T·m +55%, better
Xmax6.4 mm −8%
Sensitivity93 dB +2.7, better
MonacorSPX-200WP
£42.44 · 58% less, betterFs36 Hz −52%, better
Qts0.59 +4%
Vas60.5 L +499%, worse
BL6.8 T·m −7%
Xmax2 mm −71%, worse
Sensitivity88.1 dB −2.2, worse
CIAREHW202
£50.08 · 50% less, betterFs30 Hz −60%, better
Qts0.44 −23%, better
Vas83 L +722%, worse
BL6.7 T·m −8%
Xmax6.5 mm −7%
Sensitivity88.4 dB −1.9
REDCATT82FHM
£50.51 · 50% less, betterFs42 Hz −44%, better
Qts0.61 +7%
Vas33.6 L +233%, worse
BL7.6 T·m +4%
Xmax5.5 mm −22%, worse
Sensitivity87.2 dB −3.1, worse
REDCATT8FHW-1
£52.63 · 47% less, betterFs41 Hz −45%, better
Qts0.60 +5%
Vas19.6 L +94%, worse
BL7.9 T·m +8%
Xmax8.7 mm +24%, better
Sensitivity84.6 dB −5.7, worse
EminenceALPHA-8A
£54.66 · 45% less, betterFs73 Hz –
Qts0.59 +4%
Vas17.7 L +75%, worse
BL7.8 T·m +7%
Xmax3.2 mm −54%, worse
Sensitivity92.1 dB +1.8
FaitalPRO8FE400
£59.38 · 41% less, betterFs100 Hz +33%, worse
Qts0.48 −16%, better
Vas9.9 L –
BL8.8 T·m +21%, better
Xmax4.9 mm −30%, worse
Sensitivity94.7 dB +4.4, better
CIAREPM203
£70.45 · 30% less, betterFs91 Hz +21%, worse
Qts0.54 −5%
Vas10 L –
BL10.1 T·m +38%, better
Xmax4.4 mm −37%, worse
Sensitivity92.7 dB +2.4, better
B&C8CL51
£85.73 · 14% less, betterFs83 Hz +11%, worse
Qts0.51 −11%, better
Vas9.5 L −6%
BL16.1 T·m +121%, better
Xmax6 mm −14%, worse
Sensitivity92.1 dB +1.8
CelestionNTR08-2011D
£125.00 · 25% more, worseFs85 Hz +13%, worse
Qts0.44 −24%, better
Vas10.3 L –
BL12.0 T·m +64%, better
Xmax6 mm −14%, worse
Sensitivity92.7 dB +2.4, better
Dayton AudioRSS210HF-4
£146.68 · 46% more, worseFs30 Hz −61%, better
Qts0.57 –
Vas23.7 L +135%, worse
BL8.1 T·m +11%, better
Xmax9 mm +29%, better
Sensitivity81.5 dB −8.8, worse
WavecorSW182BD03
£163.40 · 63% more, worseFs35 Hz −53%, better
Qts0.44 −23%, better
Vas12.7 L +26%, worse
BL7.6 T·m +4%
Xmax7 mm –
Sensitivity82.9 dB −7.4, worse
WavecorSW182BD04
£163.40 · 63% more, worseFs37 Hz −50%, better
Qts0.49 −14%, better
Vas12.7 L +26%, worse
BL10.2 T·m +40%, better
Xmax7 mm –
Sensitivity83.1 dB −7.2, worse
Scanspeak18M/4631T00
£195.19 · 95% more, worseFs65 Hz −13%, better
Qts0.60 +5%
Vas14 L +39%, worse
BL5.6 T·m −23%, worse
Xmax3 mm −57%, worse
Sensitivity89.6 dB −0.7
Beyma8CX300FE
No current priceFs89 Hz +19%, worse
Qts0.55 −4%
Vas10.8 L +7%
BL9.6 T·m +32%, better
Xmax6 mm −14%, worse
Sensitivity92.9 dB +2.6, better
HiViD8.4MKII
No current priceFs36 Hz −52%, better
Qts0.56 –
Vas40 L +296%, worse
BL7.1 T·m –
Xmax5 mm −29%, worse
Sensitivity86.9 dB −3.4, worse
No photo
PHL Audio2001
No current priceFs77 Hz –
Qts0.53 −7%
Vas13.8 L +37%, worse
BL9.5 T·m +30%, better
Xmax5.5 mm −21%, worse
Sensitivity92.2 dB +1.9
No photo
PHL Audio2001NDU
No current priceFs77 Hz –
Qts0.53 −7%
Vas13.8 L +37%, worse
BL9.5 T·m +30%, better
Xmax5.5 mm −21%, worse
Sensitivity92.2 dB +1.9
PRV Audio8MB500-4
No current priceFs72 Hz −4%
Qts0.64 +12%, worse
Vas17.3 L +71%, worse
BL7.5 T·m +3%
Xmax4.5 mm −36%, worse
Sensitivity91.9 dB +1.6
FaitalPRO8HX210
No current priceFs83 Hz +11%, worse
Qts0.44 −23%, better
Vas10.1 L –
BL11.9 T·m +62%, better
Xmax6.5 mm −7%
Sensitivity92.7 dB +2.4, better
CelestionTF0815RE
No current priceFs65 Hz −14%, better
Qts0.53 −6%
Vas22.1 L +119%, worse
BL8.9 T·m +22%, better
Xmax5.3 mm −25%, worse
Sensitivity91.7 dB +1.4
PRV Audio69MR500-PHP-4
No current priceFs92 Hz +22%, worse
Qts0.65 +14%, worse
Vas15.2 L +50%, worse
BL6.8 T·m −7%
Xmax2.9 mm −59%, worse
Sensitivity94.4 dB +4.1, better
MarkaudioMA200-P MICA
No current priceFs39 Hz −48%, better
Qts0.37 −35%, better
Vas66.5 L +558%, worse
BL7.0 T·m −4%
Xmax7 mm –
Sensitivity91.5 dB +1.2
Sica8 H 1 CS
No current priceFs50 Hz −34%, better
Qts0.54 −5%
Vas27.8 L +175%, worse
BL8.7 T·m +20%, better
Xmax4 mm −43%, worse
Sensitivity89.5 dB −0.8
CIARECM200N
No current priceFs94 Hz +25%, worse
Qts0.46 −19%, better
Vas8.8 L −13%, better
BL8.6 T·m +17%, better
Xmax3.8 mm −46%, worse
Sensitivity93.5 dB +3.2, better
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
- Thomann4.0 out of 53 ratings · Checked 7 Oct 2026Read reviews on Thomann
Each shop collects its own ratings. Bits shows them as published and doesn't verify them.
| Shop | Price | Against the lowest | Stock | Link |
|---|---|---|---|---|
Thomann | £103.00, the lowest price | In stock | Visit shop at Thomann |
Best price over time
Tracked since 20 Apr
Recent changes
- 4 OctThomann£104.00 → £103.00Down 1.0% from £104.00
- 26 SepThomann£103.00 → £104.00Up 1.0% from £103.00
- 18 SepThomann£104.00 → £103.00Down 1.0% from £104.00