- 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 4Ω
35–1000 Hz
£278.92
1.8%JP Leisure · In stock · All 6 offers
- Fs
- 35Hz
- Xmax
- 10mm
- SPL
- 95dB
- Pe
- 1200W
- BL
- 22T·m
- Vd
- 1210cm³
- Qts
- 0.37
- Vas
- 192L
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 f939bcee22ec…Medium confidence7,125 selected pixels of 7,125 - Trace datasheet-response-trace-poc/v2
free-air impedance
Impedance response
240 plotted pointsSource file SHA-256 f939bcee22ec…Medium confidence3,977 selected pixels of 3,977
Published graphs
B&C 18NBX100 is an 18-inch 4 ohm LF driver rated at 1200 W RMS. The validated T/S data includes Fs 35 Hz, Qts 0.37, Vas 192 L, Xmax 10 mm, sensitivity 95.3 dB, plus 1210 cm³ Vd and 90 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 £278.92.
The published T/S values agree with each other
Thiele/Small
- Fs
- 35Hz
- Qts
- 0.37
- Qes
- 0.39
- Qms
- 7
- Vas
- 192L
- Re
- 3.6Ω
- Le
- 1.74mH
Motor and cone
- BL
- 22T·m
- Sd
- 1210cm²
- Mms
- 225g
- Xmax
- 10mm
- Vd †
- 1210cm³
- Voice coil
- 100mm
- Flux density
- 1.10T
Power and response
- Sensitivity †
- 95.3dB
- Manufacturer sensitivity
- 96dB
- Power
- 1200W
- Nominal power
- 1200W
- Impedance
- 4Ω
- Min. impedance
- 4.4Ω
- Range
- 35–1000Hz
- EBP †
- 90 · Sealed or vented
Size and mounting
- Diameter
- 460mm
- Cutout
- 422mm
- Bolt circle
- 440mm
- Depth
- 208mm
- Weight
- 9.1kg
† Calculated by bits from the published values
What this validation status means
Everything else B&C lists
LF
- BL
- 22T·m
- Fs
- 35Hz
- Le
- 1.74mH
- Re
- 3.6Ω
- Sd
- 1210cm²
- Mms
- 225g
- Qes
- 0.39
- Qms
- 7
- Qts
- 0.37
- SPL
- 95.3dB
- Vas
- 192L
- Xmax
- 10mm
- Power
- 1200W
- Impedance
- 4Ω
- Flux density
- 1.10T
- Sensitivity
- 96dB
- Low limit
- 35Hz
- Nominal power
- 1200W
- Calculated sensitivity †
- 95.3dB
- High limit
- 1000Hz
- Manufacturer sensitivity
- 96dB
- Min. impedance
- 4.4Ω
- Voice coil
- 100mm
- Weight
- 9.1kg
- Diameter
- 460mm
- Depth
- 208mm
- Cutout
- 422mm
- Bolt circle
- 440mm
- Bl
- 22 Tm
- Fs
- 35 Hz
- Le
- 1.74 mH
- Re
- 3.6 Ω
- Sd
- 1210 cm² (187.55 in²)
- Ebp
- 90 Hz
- Mms
- 225 g
- Qes
- 0.39
- Qms
- 7
- Qts
- 0.37
- Vas
- 192 dm³ (6.78 ft³)
- Η0
- 2.02 %
- Cone
- RCK18NBX1004
- 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 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
- 11.65 kg (25.68 lb)
- Nominal diameter
- 460 mm (18 in)
- Overall diameter
- 460 mm (18 in)
- Winding material
- Copper
- Minimum impedance
- 4.4 Ω
- Nominal impedance
- 4 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
£278.92
Fs
35 Hz
Qts
0.37
Vas
192 L
BL
22 T·m
Xmax
10 mm
Sensitivity
95.3 dB
Power
1200 W
SB AudienceROSSO-18SW750
£200.80 · 28% less, betterFs36 Hz –
Qts0.43 +16%, worse
Vas206.9 L +8%
BL23.3 T·m +6%
Xmax8.8 mm −12%, worse
Sensitivity95.3 dB –
Beyma18LEX1200FE
£222.28 · 20% less, betterFs32 Hz −9%
Qts0.38 –
Vas277 L +44%, worse
BL23.2 T·m +5%
Xmax11 mm +10%, better
Sensitivity95.7 dB –
Beyma18LEX1000FE
£225.00 · 19% less, betterFs34 Hz –
Qts0.38 –
Vas250 L +30%, worse
BL23.8 T·m +8%
Xmax11 mm +10%, better
Sensitivity96 dB +0.7
B&C18PZW100
£227.00 · 19% less, betterFs37 Hz +6%
Qts0.36 –
Vas186 L −3%
BL25.5 T·m +16%, better
Xmax8 mm −20%, worse
Sensitivity96 dB +0.7
B&C18TBW100
£227.94 · 18% less, betterFs33 Hz −6%
Qts0.32 −14%, better
Vas181.5 L −5%
BL22.8 T·m +4%
Xmax12 mm +20%, better
Sensitivity94.9 dB –
CelestionFTR18-4080HDX
£237.20 · 15% less, betterFs39 Hz +12%, worse
Qts0.43 +16%, worse
Vas174.9 L −9%
BL21.3 T·m −3%
Xmax10.1 mm –
Sensitivity95.6 dB –
Beyma18LEX1000ND
£249.54 · 11% less, betterFs34 Hz –
Qts0.39 +5%
Vas260 L +35%, worse
BL22 T·m –
Xmax11 mm +10%, better
Sensitivity95.9 dB +0.6
Eighteen Sound18LW1400
£266.74 · 4% lessFs33 Hz −6%
Qts0.32 −14%, better
Vas210 L +9%
BL22.1 T·m –
Xmax9 mm −10%, worse
Sensitivity95.5 dB –
Beyma18LEX1200ND
£279.79 · Same priceFs36 Hz –
Qts0.33 −11%, better
Vas219 L +14%, worse
BL26.4 T·m +20%, better
Xmax11 mm +10%, better
Sensitivity96.7 dB +1.4
FaneCOLOSSUS 18SB
£280.00 · Same priceFs36 Hz –
Qts0.35 −6%
Vas199 L +4%
BL24 T·m +9%
Xmax8.3 mm −18%, worse
Sensitivity96.1 dB +0.8
B&C18SW100
£333.25 · 19% more, worseFs36 Hz –
Qts0.36 –
Vas160 L −17%, better
BL22 T·m –
Xmax12.5 mm +25%, better
Sensitivity94.7 dB −0.6
Eighteen Sound18TLW3000
£337.44 · 21% more, worseFs32 Hz −9%
Qts0.35 −5%
Vas185 L −4%
BL20 T·m −9%
Xmax12 mm +20%, better
Sensitivity94.3 dB −1
BMS18N830V2
£347.59 · 25% more, worseFs31 Hz −11%, better
Qts0.37 –
Vas262 L +36%, worse
BL22.4 T·m –
Xmax8 mm −20%, worse
Sensitivity95 dB –
FaitalPRO18HW1070
£350.83 · 26% more, worseFs32 Hz −9%
Qts0.33 −11%, better
Vas191.5 L –
BL21.6 T·m –
Xmax13 mm +30%, better
Sensitivity94.7 dB −0.6
FaitalPRO18HP1060
£436.24 · 56% more, worseFs35 Hz –
Qts0.33 −11%, better
Vas184.4 L −4%
BL20.7 T·m −6%
Xmax12.4 mm +24%, better
Sensitivity95.7 dB –
CelestionERPROX18
No current priceFs35 Hz –
Qts0.38 –
Vas188.9 L –
BL24.4 T·m +11%, better
Xmax9.5 mm −5%
Sensitivity94.7 dB −0.6
B&C18RBX100
No current priceFs42 Hz +20%, worse
Qts0.40 +8%
Vas136 L −29%, better
BL22 T·m –
Xmax10 mm –
Sensitivity95.9 dB +0.6
Sica18 S 4 CP
No current priceFs33 Hz −6%
Qts0.35 −5%
Vas225 L +17%, worse
BL23.5 T·m +7%
Xmax11 mm +10%, better
Sensitivity95.2 dB –
Sica18 PFS 4
No current priceFs29 Hz −18%, better
Qts0.37 –
Vas245.9 L +28%, worse
BL24.6 T·m +12%, better
Xmax9.5 mm −5%
Sensitivity93.5 dB −1.8
P.AudioP-18N-V3
No current priceFs35 Hz –
Qts0.40 +8%
Vas179.5 L −7%
BL24.1 T·m +10%
Xmax9 mm −10%, worse
Sensitivity94.7 dB −0.6
Sica18 S 4 PL
No current priceFs36 Hz +3%
Qts0.39 +5%
Vas189 L –
BL23.5 T·m +7%
Xmax8 mm −20%, worse
Sensitivity95.3 dB –
Precision DevicesPD.184C002
No current priceFs40 Hz +14%, worse
Qts0.34 −8%
Vas268 L +40%, worse
BL21 T·m −5%
Xmax9.7 mm −3%
Sensitivity98.8 dB +3.5, better
Eighteen Sound18LW2420
No current priceFs34 Hz –
Qts0.31 −16%, better
Vas208 L +8%
BL20.2 T·m −8%
Xmax10 mm –
Sensitivity96.1 dB +0.8
No current price
Fs33 Hz −6%
Qts0.39 +4%
Vas257 L +34%, worse
BL22.4 T·m –
Xmax12 mm +20%, better
Sensitivity95.6 dB –
CelestionCF1840H
No current priceFs39 Hz +10%, worse
Qts0.35 −5%
Vas196.7 L –
BL17.4 T·m −21%, worse
Xmax8 mm −20%, worse
Sensitivity96.7 dB +1.4
P.Audio19NT-115XB
No current priceFs35 Hz –
Qts0.39 +5%
Vas206 L +7%
BL29 T·m +32%, better
Xmax9.5 mm −5%
Sensitivity95.4 dB –
BishopSoundBDP18/4
No current priceFs39 Hz +11%, worse
Qts0.40 +7%
Vas183.3 L −5%
BL17.1 T·m −22%, worse
Xmax11.3 mm +13%, better
Sensitivity96.2 dB +0.9
P.Audio18BM-1000S
No current priceFs35 Hz –
Qts0.40 +8%
Vas212.1 L +10%, worse
BL23.8 T·m +8%
Xmax8 mm −20%, worse
Sensitivity95.3 dB –
PeerlessFSL-1830R03-08
No current priceFs32 Hz −9%
Qts0.36 –
Vas338 L +76%, worse
BL21.4 T·m –
Xmax8.7 mm −13%, worse
Sensitivity96.8 dB +1.5
Precision DevicesPD.185C001
No current priceFs32 Hz −9%
Qts0.40 +9%
Vas302 L +57%, worse
BL21 T·m −5%
Xmax10.5 mm +5%
Sensitivity95.7 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 | £278.92, the lowest price | In stock | Visit shop at JP Leisure | |
Blue Aran 4-6 weeks | £274.00 | Usually available in 4-6 weeks | Visit shop at Blue Aran | |
JP Leisure Not currently listed · Last seen 7 Aug 2026 | £278.92 | In stock | Visit shop at JP Leisure | |
Audio Video Parts Import VAT and duty may apply | £228.57 | Special order | Visit shop at Audio Video Parts |
Best price over time
Tracked since 1 Apr
Recent changes
- 2 AugBlue Aran£272.99 → £274.00Up 0.4% from £272.99
- 17 JulBlue Aran£259.00 → £272.99Up 5.4% from £259.00
- 23 JunJP Leisure£275.46 → £278.92Up 1.3% from £275.46