B&C design · archived
S18H
18" 2400W Horn Loaded Subwoofer Enclosure - 18" Subwoofer
- Drivers
- 18TBX100, 8 Ω
- Power
- 2,400 W
Designed with the 8 Ω version.
18-inch LF driver · 18TBX series · 100 mm voice coil · 1,200 W
B&C 18TBX100 4Ω
35–1000 Hz
£239.00
0.4%Thomann · In stock · All 6 offers
- Fs
- 30Hz
- Xmax
- 9mm
- SPL
- 95dB
- Pe
- 1200W
- BL
- 22T·m
- Vd
- 1089cm³
- Qts
- 0.31
- Vas
- 256L
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 11d682d6a1d1…Medium confidence4,538 selected pixels of 5,468 - Trace datasheet-response-trace-poc/v2
free-air impedance
Impedance response
240 plotted pointsSource file SHA-256 11d682d6a1d1…Medium confidence3,742 selected pixels of 3,742
Published graphs
B&C 18TBX100 is an 18-inch 4 ohm LF driver rated at 1200 W RMS. The validated T/S data includes Fs 30 Hz, Qts 0.31, Vas 256 L, Xmax 9 mm, sensitivity 95.2 dB, plus 1089 cm³ Vd and 91 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 £235.51.
The published T/S values agree with each other
Thiele/Small
- Fs
- 30Hz
- Qts
- 0.31
- Qes
- 0.33
- Qms
- 7
- Vas
- 256L
- Re
- 3.7Ω
- Le
- 1.73mH
Motor and cone
- BL
- 22T·m
- Sd
- 1210cm²
- Mms
- 230g
- Xmax
- 9mm
- Vd †
- 1089cm³
- Voice coil
- 100mm
- Flux density
- 1.10T
Power and response
- Sensitivity †
- 95.2dB
- Manufacturer sensitivity
- 94dB
- Power
- 1200W
- Nominal power
- 1200W
- Impedance
- 4Ω
- Min. impedance
- 4.4Ω
- Range
- 35–1000Hz
- EBP †
- 91 · Sealed or vented
Size and mounting
- Diameter
- 460mm
- Cutout
- 422mm
- Bolt circle
- 440mm
- Depth
- 209mm
- Weight
- 12.7kg
Sensitivity shows 95.2 dB, calculated from the T/S values. B&C publishes 94.0 dB, 1.2 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else B&C lists
LF
- BL
- 22T·m
- Fs
- 30Hz
- Le
- 1.73mH
- Re
- 3.7Ω
- Sd
- 1210cm²
- Mms
- 230g
- Qes
- 0.33
- Qms
- 7
- Qts
- 0.31
- SPL
- 95.2dB
- Vas
- 256L
- Xmax
- 9mm
- Power
- 1200W
- Impedance
- 4Ω
- Flux density
- 1.10T
- Sensitivity
- 94dB
- Low limit
- 35Hz
- Nominal power
- 1200W
- Calculated sensitivity †
- 95.2dB
- High limit
- 1000Hz
- Manufacturer sensitivity
- 94dB
- Min. impedance
- 4.4Ω
- Voice coil
- 100mm
- Weight
- 12.7kg
- Diameter
- 460mm
- Depth
- 209mm
- Cutout
- 422mm
- Bolt circle
- 440mm
- Bl
- 22 Tm
- Fs
- 30 Hz
- Le
- 1.73 mH
- Re
- 3.7 Ω
- Sd
- 1210 cm² (187.6 in²)
- Ebp
- 91 Hz
- Mms
- 230 g
- Qes
- 0.33
- Qms
- 7
- Qts
- 0.31
- Vas
- 256 dm³ (9.04 ft³)
- Η0
- 1.96 %
- Cone
- RCK18TBX1004
- Xmax
- 9 mm
- Xvar
- 11 mm
- Depth
- 209 mm (8.2 in)
- Spider
- Double Silicone
- Cone shape
- Radial
- Net weight
- 12.7 kg (28 lb)
- Pole design
- T-Pole
- Sensitivity
- 94 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
- Ferrite
- Shipping weight
- 14.3 kg (31.53 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
- 12 mm (0.5 in)
- Recommended tuning
- 34 Hz
- Voice coil diameter
- 100 mm (4 in)
- Bolt circle diameter
- 440 mm (17.3 in)
- Recommended enclosure
- 200 dm³ (7.06 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
- 16 mm (0.63 in)
- Air volume occupied by driver
- 10.5 dm³ (0.37 ft³)
02
Designs
Cabinets for the 18TBX100: a design and a suggested box from B&C, and plans builders have published.
All 18TBX100 designsHow we find designsB&C’s design
From the maker, with plans to download
B&C’s suggested box
From B&C’s 18TBX100 page
- Net volume
- 200L
- Tuning
- 34Hz
B&C gives the volume and tuning; the port is sized for the driver when you open it.
Modelling the box in 00 Simulator…
03
Compare
Same-size drivers, compared with the 18TBX100. Clear differences are green when better and red when worse.
This driver18TBX100
Best price
£235.51
Fs
30 Hz
Qts
0.31
Vas
256 L
BL
22 T·m
Xmax
9 mm
Sensitivity
95.2 dB
Power
1200 W
RCFL18P300
£225.00 · 4% lessFs33 Hz +10%, worse
Qts0.33 +6%
Vas226 L −12%, better
BL23.5 T·m +7%
Xmax8 mm −11%, worse
Sensitivity95.8 dB +0.6
Beyma18P1000FEV2S
£249.00 · 6% more, worseFs33 Hz +10%, worse
Qts0.32 +3%
Vas230 L −10%, better
BL26.8 T·m +22%, better
Xmax8 mm −11%, worse
Sensitivity96 dB +0.8
FaitalPRO18HP1010
£249.92 · 6% more, worseFs35 Hz +17%, worse
Qts0.31 –
Vas225.9 L −12%, better
BL18.4 T·m −16%, worse
Xmax9.8 mm +8%
Sensitivity96.8 dB +1.6
RCFLF18G401
£252.42 · 7% more, worseFs33 Hz +10%, worse
Qts0.29 −6%
Vas268 L +5%
BL24.6 T·m +12%, better
Xmax9 mm –
Sensitivity97.1 dB +1.9
B&C18NW100
£266.02 · 13% more, worseFs30 Hz –
Qts0.27 −13%, better
Vas203.5 L −21%, better
BL24.7 T·m +12%, better
Xmax9 mm –
Sensitivity95 dB –
Eighteen Sound18LW1400
£266.74 · 13% more, worseFs33 Hz +10%, worse
Qts0.32 +3%
Vas210 L −18%, better
BL22.1 T·m –
Xmax9 mm –
Sensitivity95.5 dB –
FaitalPRO18HP1022
£269.40 · 14% more, worseFs35 Hz +17%, worse
Qts0.30 −3%
Vas204.9 L −20%, better
BL28 T·m +27%, better
Xmax9.5 mm +6%
Sensitivity96.6 dB +1.4
Eighteen Sound18LW2400
£272.63 · 16% more, worseFs33 Hz +10%, worse
Qts0.32 +3%
Vas235 L −8%
BL18 T·m −18%, worse
Xmax9.5 mm +6%
Sensitivity96.1 dB +0.9
FaitalPRO18FX600
£278.72 · 18% more, worseFs32 Hz +7%
Qts0.30 −3%
Vas257.3 L –
BL24.5 T·m +11%, better
Xmax11.3 mm +25%, better
Sensitivity96.4 dB +1.2
FaneCOLOSSUS 18SB
£287.00 · 22% more, worseFs36 Hz +20%, worse
Qts0.35 +12%, worse
Vas199 L −22%, better
BL24 T·m +9%
Xmax8.3 mm −8%
Sensitivity96.1 dB +0.9
RCFL18P400
£289.00 · 23% more, worseFs29 Hz −3%
Qts0.28 −10%
Vas340 L +33%, worse
BL24.6 T·m +12%, better
Xmax9 mm –
Sensitivity96.6 dB +1.4
Eighteen Sound18LW1251
£295.24 · 25% more, worseFs35 Hz +17%, worse
Qts0.27 −13%, better
Vas268 L +5%
BL23.6 T·m +7%
Xmax9 mm –
Sensitivity98.2 dB +3, better
FaitalPRO18HP1030
£295.66 · 26% more, worseFs35 Hz +17%, worse
Qts0.32 +3%
Vas172.2 L −33%, better
BL21.7 T·m –
Xmax12.4 mm +38%, better
Sensitivity95.5 dB –
Dayton Audio18SW1200N-8
£304.94 · 29% more, worseFs32 Hz +7%
Qts0.33 +6%
Vas253.6 L –
BL27.6 T·m +25%, better
Xmax9.1 mm –
Sensitivity95.8 dB +0.6
Eighteen Sound18LW2420
£307.44 · 31% more, worseFs34 Hz +13%, worse
Qts0.31 –
Vas208 L −19%, better
BL20.2 T·m −8%
Xmax10 mm +11%, better
Sensitivity96.1 dB +0.9
BMS18S430V2
£316.72 · 34% more, worseFs31 Hz +3%
Qts0.34 +10%
Vas262 L –
BL23.5 T·m +7%
Xmax8 mm −11%, worse
Sensitivity95.4 dB –
BMS18N830V2
£347.59 · 48% more, worseFs31 Hz +3%
Qts0.37 +19%, worse
Vas262 L –
BL22.4 T·m –
Xmax8 mm −11%, worse
Sensitivity95 dB –
FaitalPRO18XL1600
£399.95 · 70% more, worseFs32 Hz +7%
Qts0.31 –
Vas201.1 L −21%, better
BL21.7 T·m –
Xmax12.9 mm +44%, better
Sensitivity95.2 dB –
Dayton AudioRSS460HO-4
£448.15 · 90% more, worseFs19 Hz −37%, better
Qts0.32 +3%
Vas272 L +6%
BL23.4 T·m +6%
Xmax12.8 mm +42%, better
Sensitivity89.2 dB −6, worse
RCFLF18G908
No current priceFs33 Hz +10%, worse
Qts0.29 −6%
Vas268 L +5%
BL24.6 T·m +12%, better
Xmax9 mm –
Sensitivity97.1 dB +1.9
Precision DevicesPD.184C002
No current priceFs40 Hz +33%, worse
Qts0.34 +10%
Vas268 L +5%
BL21 T·m −5%
Xmax9.7 mm +8%
Sensitivity98.8 dB +3.6, better
Oberton18B35
No current priceFs32 Hz +6%
Qts0.32 +5%
Vas333.6 L +30%, worse
BL19.3 T·m −12%, worse
Xmax9 mm –
Sensitivity97 dB +1.8
Oberton18XB700
No current priceFs36 Hz +20%, worse
Qts0.30 –
Vas183.2 L −28%, better
BL26.1 T·m +19%, better
Xmax9 mm –
Sensitivity96.4 dB +1.2
Oberton18B500
No current priceFs35 Hz +16%, worse
Qts0.28 −11%, better
Vas243.9 L −5%
BL24.1 T·m +9%
Xmax8.8 mm –
Sensitivity97.7 dB +2.5, better
CelestionFTR18-4080F
No current priceFs33 Hz +8%
Qts0.31 –
Vas281.3 L +10%
BL22.5 T·m –
Xmax6 mm −33%, worse
Sensitivity96.6 dB +1.4
Eighteen Sound18W1300
No current priceFs35 Hz +17%, worse
Qts0.33 +6%
Vas336 L +31%, worse
BL20.4 T·m −7%
Xmax8.5 mm −6%
Sensitivity98.2 dB +3, better
Oberton18B450
No current priceFs34 Hz +15%, worse
Qts0.34 +10%, worse
Vas241.6 L −6%
BL22.1 T·m –
Xmax7.3 mm −19%, worse
Sensitivity96.4 dB +1.2
Oberton18NXB700
No current priceFs36 Hz +21%, worse
Qts0.31 –
Vas155.5 L −39%, better
BL27.8 T·m +26%, better
Xmax9 mm –
Sensitivity95.6 dB –
PeerlessFSL-1830R03-08
No current priceFs32 Hz +7%
Qts0.36 +16%, worse
Vas338 L +32%, worse
BL21.4 T·m –
Xmax8.7 mm −4%
Sensitivity96.8 dB +1.6
FaneCOLOSSUS 18XB
No current priceFs33 Hz +10%, worse
Qts0.34 +9%
Vas236 L −8%
BL25.9 T·m +18%, better
Xmax7.5 mm −17%, worse
Sensitivity95.8 dB +0.6
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
- Parts Express4.8 out of 54 ratings · Checked 6 Oct 2026Read reviews on Parts Express
- Thomann5.0 out of 53 ratings · Checked 6 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 | £239.00, the lowest price | In stock | Visit shop at Thomann | |
JP Leisure Not currently listed · Last seen 7 Aug 2026 | £239.94 | 0.4% above the lowest price | In stock | Visit shop at JP Leisure |
JP Leisure | £239.94 | 0.4% above the lowest price | In stock | Visit shop at JP Leisure |
Blue Aran | £244.00 | 2.1% above the lowest price | Due 2 Dec 2026 | Visit shop at Blue Aran |
Parts Express Import VAT and duty may apply | £302.38 | 27% above the lowest price | 6 in stock | Visit shop at Parts Express |
Best price over time
Tracked since 1 Apr
Recent changes
- 4 OctThomann£244.00 → £239.00Down 2.0% from £244.00
- 12 SepBlue Aran£238.99 → £244.00Up 2.1% from £238.99
- 2 SepThomann£239.00 → £244.00Up 2.1% from £239.00