B&C design · archived
S18BN
18" 3400W Subwoofer Enclosure - 18" Neo Subwoofer
- Drivers
- 18SW115, 8 Ω
- Power
- 3,400 W
Designed with the 8 Ω version.
18-inch LF driver · 18SW series · 116 mm voice coil · 1,700 W
B&C 18SW115 4Ω
35–1500 Hz
- Fs
- 34Hz
- Xmax
- 14mm
- SPL
- 95dB
- Pe
- 1700W
- BL
- 26T·m
- Vd
- 1694cm³
- Qts
- 0.30
- Vas
- 149L
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 ac6a2bf4a385…Medium confidence6,828 selected pixels of 6,828 - Trace datasheet-response-trace-poc/v2
free-air impedance
Impedance response
240 plotted pointsSource file SHA-256 ac6a2bf4a385…Medium confidence3,823 selected pixels of 3,823
Published graphs
B&C 18SW115 is an 18-inch 4 ohm LF driver rated at 1700 W RMS. The validated T/S data includes Fs 34 Hz, Qts 0.30, Vas 149.1 L, Xmax 14 mm, sensitivity 94.8 dB, plus 1694 cm³ Vd and 110 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 £431.10.
The published T/S values agree with each other
Thiele/Small
- Fs
- 34Hz
- Qts
- 0.30
- Qes
- 0.31
- Qms
- 6.1
- Vas
- 149.1L
- Re
- 3.3Ω
- Le
- 1.36mH
Motor and cone
- BL
- 26T·m
- Sd
- 1210cm²
- Mms
- 304g
- Xmax
- 14mm
- Vd †
- 1694cm³
- Voice coil
- 116mm
- Flux density
- 1.16T
Power and response
- Sensitivity †
- 94.8dB
- Manufacturer sensitivity
- 96dB
- Power
- 1700W
- Nominal power
- 1700W
- Impedance
- 4Ω
- Min. impedance
- 4.1Ω
- Range
- 35–1500Hz
- EBP †
- 110 · Leans vented
Size and mounting
- Diameter
- 460mm
- Cutout
- 425mm
- Bolt circle
- 443mm
- Depth
- 242mm
- Weight
- 11.9kg
Sensitivity shows 94.8 dB, calculated from the T/S values. B&C publishes 96.0 dB, 1.2 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else B&C lists
LF
- BL
- 26T·m
- Fs
- 34Hz
- Le
- 1.36mH
- Re
- 3.3Ω
- Sd
- 1210cm²
- Mms
- 304g
- Qes
- 0.31
- Qms
- 6.1
- Qts
- 0.30
- SPL
- 94.8dB
- Vas
- 149.1L
- Xmax
- 14mm
- Power
- 1700W
- Impedance
- 4Ω
- Flux density
- 1.16T
- Sensitivity
- 96dB
- Low limit
- 35Hz
- Nominal power
- 1700W
- Calculated sensitivity †
- 94.8dB
- High limit
- 1500Hz
- Manufacturer sensitivity
- 96dB
- Min. impedance
- 4.1Ω
- Voice coil
- 116mm
- Weight
- 11.9kg
- Diameter
- 460mm
- Depth
- 242mm
- Cutout
- 425mm
- Bolt circle
- 443mm
- Bl
- 26 Tm
- Fs
- 34 Hz
- Le
- 1.36 mH
- Re
- 3.3 Ω
- Sd
- 1210 cm² (187.6 in²)
- Ebp
- 110 Hz
- Mms
- 304 g
- Qes
- 0.31
- Qms
- 6.1
- Qts
- 0.3
- Vas
- 149.1 dm³ (5.27 ft³)
- Η0
- 1.8 %
- Cone
- RCK18SW1154
- Xmax
- 14 mm
- Xvar
- 16 mm
- Depth
- 242 mm (9.5 in)
- Spider
- Double Silicone
- Cone shape
- Radial
- Net weight
- 11.9 kg (26.2 lb)
- Pole design
- T-Pole
- Sensitivity
- 96 dB
- Flux density
- 1.16 T
- Shipping box
- 500x500x300 mm (19.69x19.69x11.81 in)
- Winding depth
- 34 mm (1.33 in)
- Shipping units
- 1 pcs
- Surround shape
- Triple Roll
- Former material
- Glass Fibre
- Frequency range
- 35 Hz - 1500 Hz
- Magnet material
- Neodymium Inside Slug
- Shipping weight
- 13.7 kg (30.2 lb)
- Nominal diameter
- 460 mm (18 in)
- Overall diameter
- 460 mm (18 in)
- Winding material
- Copper
- Minimum impedance
- 4.1 Ω
- Nominal impedance
- 4 Ω
- Magnetic gap depth
- 14 mm (0.55 in)
- Recommended tuning
- 35 Hz
- Voice coil diameter
- 116 mm (4.5 in)
- Bolt circle diameter
- 443 mm (17.44 in)
- Recommended enclosure
- 150 dm³ (5.3 ft³)
- Woofer cone treatment
- TWP Waterproof Both Sides
- Baffle cutout diameter
- 425 mm (16.73 in)
- Nominal power handling
- 1700 W
- Continuous power handling
- 3400 W
- Flange and gasket thickness
- 16 mm (0.62 in)
- Air volume occupied by driver
- 10.5 dm³ (0.37 ft³)
02
Designs
Cabinets for the 18SW115: two designs and a suggested box from B&C, and plans builders have published.
All 18SW115 designsHow we find designsB&C’s designs
From the maker, with plans to download
B&C design · archived
S18CN
18" 3400W Small Enclosure Subwoofer - 18" Neo Subwoofer
- Drivers
- 18SW115, 8 Ω
- Power
- 3,400 W
Designed with the 8 Ω version.
B&C’s suggested box
From B&C’s 18SW115 page
- Net volume
- 150L
- Tuning
- 35Hz
B&C gives the volume and tuning; the port is sized for the driver when you open it.
Modelling the box in 00 Simulator…
Plans from builders
Links to published plans that name this driver
In the plan’s list of drivers
03
Compare
Same-size drivers, compared with the 18SW115. Clear differences are green when better and red when worse.
This driver18SW115
Best price
£431.10
Fs
34 Hz
Qts
0.30
Vas
149.1 L
BL
26 T·m
Xmax
14 mm
Sensitivity
94.8 dB
Power
1700 W
B&C18TBW100
£230.57 · 47% less, betterFs33 Hz –
Qts0.32 +7%
Vas181.5 L +22%, worse
BL22.8 T·m −12%, worse
Xmax12 mm −14%, worse
Sensitivity94.9 dB –
B&C18PZB100
£232.07 · 46% less, betterFs38 Hz +12%, worse
Qts0.28 −7%
Vas164 L +10%
BL25 T·m −4%
Xmax8 mm −43%, worse
Sensitivity96.9 dB +2.1, better
RCFLF18X401
£289.00 · 33% less, betterFs30 Hz −12%, better
Qts0.30 –
Vas274 L +84%, worse
BL26.5 T·m –
Xmax12 mm −14%, worse
Sensitivity95.8 dB +1
Eighteen Sound18LW2600
£300.67 · 30% less, betterFs30 Hz −12%, better
Qts0.28 −7%
Vas186 L +25%, worse
BL23.4 T·m −10%, worse
Xmax14 mm –
Sensitivity94.4 dB –
FaitalPRO18HP1030
£304.06 · 29% less, betterFs35 Hz –
Qts0.32 +7%
Vas172.2 L +15%, worse
BL21.7 T·m −17%, worse
Xmax12.4 mm −11%, worse
Sensitivity95.5 dB +0.7
RCFLF18N405
£325.54 · 24% less, betterFs30 Hz −12%, better
Qts0.32 +7%
Vas227 L +52%, worse
BL26.5 T·m –
Xmax14 mm –
Sensitivity94.6 dB –
SB AudienceNERO-18SW1100D
£338.74 · 21% less, betterFs36 Hz +6%
Qts0.33 +10%, worse
Vas153.1 L –
BL30.9 T·m +19%, better
Xmax12.2 mm −13%, worse
Sensitivity95.3 dB +0.5
BMS18S450
£345.00 · 20% less, betterFs29 Hz −15%, better
Qts0.31 +3%
Vas281 L +88%, worse
BL26.5 T·m –
Xmax12 mm −14%, worse
Sensitivity95.3 dB +0.5
B&C18DS100
£350.64 · 19% less, betterFs32 Hz −6%
Qts0.24 −20%, better
Vas157 L +5%
BL24.3 T·m −7%
Xmax14 mm –
Sensitivity95.3 dB +0.5
RCFLF18X451
£360.00 · 16% less, betterFs30 Hz −12%, better
Qts0.28 −7%
Vas220 L +48%, worse
BL30.5 T·m +17%, better
Xmax14 mm –
Sensitivity95.1 dB –
CelestionTSQ1845
£385.36 · 11% less, betterFs35 Hz –
Qts0.29 −3%
Vas119.3 L −20%, better
BL33.8 T·m +30%, better
Xmax15 mm +7%
Sensitivity94.3 dB −0.5
CelestionCF18VJD
£399.00 · 7% less, betterFs35 Hz –
Qts0.31 +3%
Vas145.8 L –
BL32.6 T·m +25%, better
Xmax12 mm −14%, worse
Sensitivity94.6 dB –
FaitalPRO18XL1600
£399.95 · 7% less, betterFs32 Hz −6%
Qts0.31 +3%
Vas201.1 L +35%, worse
BL21.7 T·m −17%, worse
Xmax12.9 mm −8%
Sensitivity95.2 dB –
MonacorCF18VJD/8
£448.03 · 4% moreFs35 Hz –
Qts0.31 +3%
Vas145.8 L –
BL32.6 T·m +25%, better
Xmax12 mm −14%, worse
Sensitivity94.6 dB –
Eighteen Sound18NLW4500
£474.29 · 10% more, worseFs37 Hz +9%
Qts0.31 +3%
Vas127 L −15%, better
BL26.7 T·m –
Xmax14.8 mm +5%
Sensitivity95.1 dB –
Eighteen Sound18NLW9601
£549.67 · 28% more, worseFs38 Hz +12%, worse
Qts0.28 −7%
Vas111 L −26%, better
BL25 T·m −4%
Xmax14 mm –
Sensitivity95.3 dB +0.5
Eighteen Sound18NTLW5000
£550.00 · 28% more, worseFs32 Hz −6%
Qts0.30 –
Vas165 L +11%, worse
BL25 T·m −4%
Xmax17.5 mm +25%, better
Sensitivity94.4 dB –
B&C18HTX100
£809.86 · 88% more, worseFs44 Hz +29%, worse
Qts0.32 +7%
Vas173 L +16%, worse
BL26.3 T·m –
Xmax13 mm −7%
Sensitivity98.4 dB +3.6, better
Oberton18XB1301DS
No current priceFs36 Hz +5%
Qts0.30 –
Vas172.9 L +16%, worse
BL26.9 T·m +3%
Xmax12 mm −14%, worse
Sensitivity96 dB +1.2
Oberton18NXB1600
No current priceFs32 Hz −5%
Qts0.30 –
Vas173.1 L +16%, worse
BL29.6 T·m +14%, better
Xmax13.5 mm −4%
Sensitivity94.5 dB –
Oberton18NXB1601
No current priceFs35 Hz –
Qts0.29 −5%
Vas146.2 L –
BL30.5 T·m +17%, better
Xmax12.5 mm −11%, worse
Sensitivity95.1 dB –
No photo
Precision DevicesPD.1845-1N
No current priceFs34 Hz –
Qts0.32 +8%
Vas179.0 L +20%, worse
BL26.4 T·m –
Xmax16 mm +14%, better
Sensitivity95.3 dB +0.5
VAS Audio18-1700FC
No current priceFs33 Hz –
Qts0.29 –
Vas181 L +21%, worse
BL33 T·m +27%, better
Xmax13.5 mm −4%
Sensitivity95.4 dB +0.6
Oberton18XB1201
No current priceFs38 Hz +12%, worse
Qts0.32 +6%
Vas159.4 L +7%
BL26.7 T·m –
Xmax10.5 mm −25%, worse
Sensitivity96.3 dB +1.5
Oberton18NXB1200
No current priceFs36 Hz +5%
Qts0.28 −6%
Vas159.6 L +7%
BL29.4 T·m +13%, better
Xmax11.5 mm −18%, worse
Sensitivity96 dB +1.2
Oberton18XB700
No current priceFs36 Hz +6%
Qts0.30 –
Vas183.2 L +23%, worse
BL26.1 T·m –
Xmax9 mm −36%, worse
Sensitivity96.4 dB +1.6
No photo
RCFLF18Y402
No current priceFs30 Hz −12%, better
Qts0.30 –
Vas274 L +84%, worse
BL26.5 T·m –
Xmax12 mm −14%, worse
Sensitivity95.8 dB +1
Oberton18NXB700
No current priceFs36 Hz +7%
Qts0.31 +4%
Vas155.5 L +4%
BL27.8 T·m +7%
Xmax9 mm −36%, worse
Sensitivity95.6 dB +0.8
RCFLF18N408
No current priceFs30 Hz −12%, better
Qts0.33 +10%, worse
Vas193 L +29%, worse
BL25.7 T·m –
Xmax15 mm +7%
Sensitivity93.6 dB −1.2
No photo
FaneIMPERIUM 18NDXL
No current priceFs33 Hz –
Qts0.29 –
Vas203 L +36%, worse
BL29.4 T·m +13%, better
Xmax12 mm −14%, worse
Sensitivity95.9 dB +1.1
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
- Parts Express5.0 out of 55 ratings · Checked 9 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 |
|---|---|---|---|---|
JP Leisure | £435.74, the lowest price | In stock | Visit shop at JP Leisure | |
JP Leisure Not currently listed · Last seen 7 Aug 2026 | £435.74 | In stock | Visit shop at JP Leisure | |
JP Leisure Not currently listed · Last seen 7 Aug 2026 | £435.74 | In stock | Visit shop at JP Leisure | |
JP Leisure | £435.74 | In stock | Visit shop at JP Leisure | |
Blue Aran | £444.00 | 1.9% above the lowest price | 4 in stock | Visit shop at Blue Aran |
Blue Aran | £444.00 | 1.9% above the lowest price | 4+ in stock | Visit shop at Blue Aran |
Thomann | £444.00 | 1.9% above the lowest price | In stock | Visit shop at Thomann |
Blue Aran Not currently listed · Last seen 25 Jun 2026 | £474.47 | 8.9% above the lowest price | Stock not listed | Visit shop at Blue Aran |
Audio Video Parts Import VAT and duty may apply | £375.55 | Special order | Visit shop at Audio Video Parts | |
Parts Express Import VAT and duty may apply | £559.98 | 29% above the lowest price | 6 in stock | Visit shop at Parts Express |
Best price over time
Tracked since 1 Apr
Recent changes
- 4 OctThomann£451.00 → £444.00Down 1.6% from £451.00
- 1 OctThomann£444.00 → £451.00Up 1.6% from £444.00
- 17 JulBlue Aran£448.99 → £444.00Down 1.1% from £448.99