- Net volume
- 200L
- Tuning
- 35Hz
B&C gives the volume and tuning; the port is sized for the driver when you open it.
18-inch LF driver · 18NBX series · 100 mm voice coil · 1,200 W
B&C 18NBX100 8Ω
35–1000 Hz
£274.00
SteadyBlue Aran · 2 in stock · All 11 offers
- Fs
- 35Hz
- Xmax
- 10mm
- SPL
- 95dB
- Pe
- 1200W
- BL
- 24.8T·m
- Vd
- 1210cm³
- Qts
- 0.38
- Vas
- 198L
Manufacturer response and impedance data, with source and trace details below. The left and right arrow keys read every shown curve at a frequency, a twelfth of an octave at a time, or an octave with Shift. Escape clears the reading.
Curve provenanceInspect 2 traces
These plotted lines are Bits digitizations of manufacturer evidence, not new measurements. How provenance works
- Trace datasheet-response-trace-poc/v2
free-air SPL
Frequency response
240 plotted pointsSource file SHA-256 7e7c718e2a50…Medium confidence7,040 selected pixels of 9,807 - Trace datasheet-response-trace-poc/v2
free-air impedance
Impedance response
240 plotted pointsSource file SHA-256 7e7c718e2a50…Medium confidence5,332 selected pixels of 5,993
Published graphs
B&C 18NBX100 is an 18-inch 8 ohm LF driver rated at 1200 W RMS. The validated T/S data includes Fs 35 Hz, Qts 0.38, Vas 198 L, Xmax 10 mm, sensitivity 95.3 dB, plus 1210 cm³ Vd and 88 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 £266.54.
The published T/S values agree with each other
Thiele/Small
- Fs
- 35Hz
- Qts
- 0.38
- Qes
- 0.40
- Qms
- 5.6
- Vas
- 198L
- Re
- 5.2Ω
- Le
- 1.85mH
Motor and cone
- BL
- 24.8T·m
- Sd
- 1210cm²
- Mms
- 217g
- Xmax
- 10mm
- Vd †
- 1210cm³
- Voice coil
- 100mm
- Flux density
- 1.10T
Power and response
- Sensitivity †
- 95.3dB
- Manufacturer sensitivity
- 96.5dB
- Power
- 1200W
- Nominal power
- 1200W
- Impedance
- 8Ω
- Min. impedance
- 6Ω
- Range
- 35–1000Hz
- EBP †
- 88 · Sealed or vented
Size and mounting
- Diameter
- 460mm
- Cutout
- 422mm
- Bolt circle
- 440mm
- Depth
- 208mm
- Weight
- 9.1kg
Sensitivity shows 95.3 dB, calculated from the T/S values. B&C publishes 96.5 dB, 1.2 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else B&C lists
LF
- BL
- 24.8T·m
- Fs
- 35Hz
- Le
- 1.85mH
- Re
- 5.2Ω
- Sd
- 1210cm²
- Mms
- 217g
- Qes
- 0.40
- Qms
- 5.6
- Qts
- 0.38
- SPL
- 95.3dB
- Vas
- 198L
- Xmax
- 10mm
- Power
- 1200W
- Impedance
- 8Ω
- Flux density
- 1.10T
- Sensitivity
- 96.5dB
- Low limit
- 35Hz
- Nominal power
- 1200W
- Calculated sensitivity †
- 95.3dB
- High limit
- 1000Hz
- Manufacturer sensitivity
- 96.5dB
- Min. impedance
- 6Ω
- Voice coil
- 100mm
- Weight
- 9.1kg
- Diameter
- 460mm
- Depth
- 208mm
- Cutout
- 422mm
- Bolt circle
- 440mm
- Bl
- 24.8 Tm
- Fs
- 35 Hz
- Le
- 1.85 mH
- Re
- 5.2 Ω
- Sd
- 1210 cm² (187.6 in²)
- Ebp
- 88 Hz
- Mms
- 217 g
- Qes
- 0.4
- Qms
- 5.6
- Qts
- 0.38
- Vas
- 198 dm³ (7 ft³)
- Η0
- 2 %
- Cone
- RCK18NBX1008
- Xmax
- 10 mm
- Xvar
- 12 mm
- Depth
- 208 mm (8.19 in)
- Spider
- Double Silicone
- Cone shape
- Radial
- Net weight
- 9.05 kg (19.95 lb)
- Pole design
- T-Pole
- Sensitivity
- 96.5 dB
- Flux density
- 1.1 T
- Shipping box
- 500x495x275 mm (19.69x19.49x10.83 in)
- Winding depth
- 25 mm (1 in)
- Shipping units
- 1 pcs
- Surround shape
- Triple Roll
- Former material
- Glass Fibre
- Frequency range
- 35 Hz - 1000 Hz
- Magnet material
- Neodymium Inside Slug
- Shipping weight
- 10.65 kg (23.48 lb)
- Nominal diameter
- 460 mm (18 in)
- Overall diameter
- 460 mm (18 in)
- Winding material
- Copper
- Minimum impedance
- 6 Ω
- Nominal impedance
- 8 Ω
- Magnetic gap depth
- 11 mm (0.43 in)
- Recommended tuning
- 35 Hz
- Voice coil diameter
- 100 mm (4 in)
- Bolt circle diameter
- 440 mm (17.3 in)
- Recommended enclosure
- 200 dm³ (7.1 ft³)
- Woofer cone treatment
- TWP Waterproof Both Sides
- Baffle cutout diameter
- 422 mm (16.6 in)
- Nominal power handling
- 1200 W
- Continuous power handling
- 2400 W
- Flange and gasket thickness
- 14 mm (0.55 in)
- Air volume occupied by driver
- 8.5 dm³ (0.3 ft³)
B&C’s suggested box
From B&C’s 18NBX100 page
Open this box in 00 Simulator
Modelling the box in 00 Simulator…
03
Compare
Same-size drivers, compared with the 18NBX100. Clear differences are green when better and red when worse.
This driver18NBX100
Best price
£266.54
Fs
35 Hz
Qts
0.38
Vas
198 L
BL
24.8 T·m
Xmax
10 mm
Sensitivity
95.3 dB
Power
1200 W
B&C18TBX100
£187.35 · 30% less, betterFs34 Hz –
Qts0.35 −8%
Vas212 L +7%
BL25.5 T·m –
Xmax9 mm −10%, worse
Sensitivity95.6 dB –
SB AudienceROSSO-18SW750
£200.80 · 25% less, betterFs36 Hz –
Qts0.43 +13%, worse
Vas206.9 L +4%
BL23.3 T·m −6%
Xmax8.8 mm −12%, worse
Sensitivity95.3 dB –
B&C18PS100
£202.02 · 24% less, betterFs30 Hz −14%, better
Qts0.39 –
Vas245 L +24%, worse
BL22.5 T·m −9%
Xmax8 mm −20%, worse
Sensitivity94.1 dB −1.2
B&C18PZW100
£224.09 · 16% less, betterFs37 Hz +6%
Qts0.36 −5%
Vas186 L −6%
BL25.5 T·m –
Xmax8 mm −20%, worse
Sensitivity96 dB +0.7
Beyma18LEX1000FE
£225.00 · 16% less, betterFs34 Hz –
Qts0.38 –
Vas250 L +26%, worse
BL23.8 T·m −4%
Xmax11 mm +10%, better
Sensitivity96 dB +0.7
Beyma18LEX1200FE
£225.00 · 16% less, betterFs32 Hz −9%
Qts0.38 –
Vas277 L +40%, worse
BL23.2 T·m −6%
Xmax11 mm +10%, better
Sensitivity95.7 dB –
FaitalPRO18HP1060
£245.81 · 8% less, betterFs35 Hz –
Qts0.37 –
Vas200.3 L –
BL24.8 T·m –
Xmax12.4 mm +24%, better
Sensitivity95.6 dB –
FaitalPRO18HP1010
£247.86 · 7% less, betterFs35 Hz –
Qts0.40 +5%
Vas240.1 L +21%, worse
BL22 T·m −11%, worse
Xmax9.8 mm –
Sensitivity95.9 dB +0.6
Beyma18LEX1000ND
£249.54 · 6% less, betterFs34 Hz –
Qts0.39 –
Vas260 L +31%, worse
BL22 T·m −11%, worse
Xmax11 mm +10%, better
Sensitivity95.9 dB +0.6
B&C18TBW100
£266.54 · Same priceFs35 Hz –
Qts0.39 –
Vas175 L −12%, better
BL26.4 T·m +6%
Xmax12 mm +20%, better
Sensitivity94.7 dB −0.6
FaitalPRO18HP1030
£269.00 · Same priceFs35 Hz –
Qts0.41 +8%
Vas185.5 L −6%
BL24.3 T·m –
Xmax12.4 mm +24%, better
Sensitivity94.7 dB −0.6
Beyma18LEX1600FE
£277.00 · 4% moreFs34 Hz –
Qts0.38 –
Vas188 L −5%
BL26.9 T·m +8%
Xmax13 mm +30%, better
Sensitivity94.7 dB −0.6
Beyma18LEX1200ND
£278.64 · 5% moreFs36 Hz –
Qts0.33 −13%, better
Vas219 L +11%, worse
BL26.4 T·m +6%
Xmax11 mm +10%, better
Sensitivity96.7 dB +1.4
Eighteen Sound18LW2420
£279.00 · 5% moreFs32 Hz −9%
Qts0.33 −13%, better
Vas252 L +27%, worse
BL25.3 T·m –
Xmax10 mm –
Sensitivity95.8 dB +0.5
FaneCOLOSSUS 18SB
£287.00 · 8% more, worseFs36 Hz –
Qts0.35 −9%
Vas199 L –
BL24 T·m −3%
Xmax8.3 mm −18%, worse
Sensitivity96.1 dB +0.8
FaitalPRO18HP1042
£290.30 · 9% more, worseFs38 Hz +9%
Qts0.41 +8%
Vas191.9 L −3%
BL24.5 T·m –
Xmax9 mm −10%, worse
Sensitivity95.9 dB +0.6
FaitalPRO18HW1070
£325.00 · 22% more, worseFs32 Hz −9%
Qts0.38 –
Vas195.9 L –
BL27 T·m +9%
Xmax13 mm +30%, better
Sensitivity94.2 dB −1.1
Eighteen Sound18TLW3000
£332.31 · 25% more, worseFs33 Hz −6%
Qts0.41 +8%
Vas185 L −7%
BL24.5 T·m –
Xmax12 mm +20%, better
Sensitivity94 dB −1.3
B&C18SW100
£337.83 · 27% more, worseFs35 Hz –
Qts0.38 –
Vas180 L −9%
BL26.1 T·m +5%
Xmax12.5 mm +25%, better
Sensitivity94.9 dB –
FaitalPRO18XL1800
£425.00 · 59% more, worseFs29 Hz −17%, better
Qts0.40 +5%
Vas215.5 L +9%
BL25.4 T·m –
Xmax20.2 mm +102%, better
Sensitivity93 dB −2.3, worse
CelestionERPROX18
No current priceFs35 Hz –
Qts0.38 –
Vas188.9 L −5%
BL24.4 T·m –
Xmax9.5 mm −5%
Sensitivity94.7 dB −0.6
Sica18 PFS 4
No current priceFs29 Hz −18%, better
Qts0.37 –
Vas245.9 L +24%, worse
BL24.6 T·m –
Xmax9.5 mm −5%
Sensitivity93.5 dB −1.8
BMS18N840
No current priceFs30 Hz −14%, better
Qts0.37 –
Vas261 L +32%, worse
BL23 T·m −7%
Xmax10 mm –
Sensitivity94.6 dB −0.7
P.Audio19NT-115XB
No current priceFs35 Hz –
Qts0.39 –
Vas206 L +4%
BL29 T·m +17%, better
Xmax9.5 mm −5%
Sensitivity95.4 dB –
P.AudioP-18N-V3
No current priceFs35 Hz –
Qts0.40 +5%
Vas179.5 L −9%
BL24.1 T·m –
Xmax9 mm −10%, worse
Sensitivity94.7 dB −0.6
Sica18 S 4 CP
No current priceFs33 Hz −6%
Qts0.35 −8%
Vas225 L +14%, worse
BL23.5 T·m −5%
Xmax11 mm +10%, better
Sensitivity95.2 dB –
Sica18 S 4 PL
No current priceFs36 Hz +3%
Qts0.39 –
Vas189 L −5%
BL23.5 T·m −5%
Xmax8 mm −20%, worse
Sensitivity95.3 dB –
P.Audio18BM-1000S
No current priceFs35 Hz –
Qts0.40 +5%
Vas212.1 L +7%
BL23.8 T·m −4%
Xmax8 mm −20%, worse
Sensitivity95.3 dB –
Dayton Audio18SW1200F-8
No current priceFs32 Hz −9%
Qts0.40 +5%
Vas287.7 L +45%, worse
BL24.4 T·m –
Xmax10.6 mm +6%
Sensitivity95.5 dB –
No current price
Fs33 Hz −6%
Qts0.39 –
Vas257 L +30%, worse
BL22.4 T·m −10%
Xmax12 mm +20%, better
Sensitivity95.6 dB –
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
- Thomann5.0 out of 52 ratings · Checked 7 Oct 2026Read reviews on Thomann
- Parts Express5.0 out of 51 rating · Checked 7 Oct 2026Read reviews on Parts Express
Each shop collects its own ratings. Bits shows them as published and doesn't verify them.
| Shop | Price | Against the lowest | Stock | Link |
|---|---|---|---|---|
Blue Aran | £274.00, the lowest price | 2 in stock | Visit shop at Blue Aran | |
Thomann 3–4 weeks | £272.00 | In stock | Visit shop at Thomann | |
Blue Aran | £274.00 | 2 in stock | Visit shop at Blue Aran | |
JP Leisure Not currently listed · Last seen 7 Aug 2026 | £278.92 | 1.8% above the lowest price | In stock | Visit shop at JP Leisure |
JP Leisure Not currently listed · Last seen 7 Aug 2026 | £278.92 | 1.8% above the lowest price | In stock | Visit shop at JP Leisure |
JP Leisure | £278.92 | 1.8% above the lowest price | In stock | Visit shop at JP Leisure |
JP Leisure | £278.92 | 1.8% above the lowest price | In stock | Visit shop at JP Leisure |
Audio Video Parts Import VAT and duty may apply | £231.71 | Special order | Visit shop at Audio Video Parts | |
Parts Express Import VAT and duty may apply | £337.87 | 23% above the lowest price | Back order | Visit shop at Parts Express |
Best price over time
Tracked since 1 Apr
Recent changes
- 26 SepThomann£274.00 → £275.00Up 0.4% from £274.00
- 18 SepThomann£275.00 → £274.00Down 0.4% from £275.00
- 2 SepThomann£274.00 → £275.00Up 0.4% from £274.00