B&C design · archived
S18BN
18" 3400W Subwoofer Enclosure - 18" Neo Subwoofer
- Drivers
- 18SW115, 8 Ω
- Power
- 3,400 W
18-inch LF driver · 18SW series · 116 mm voice coil · 1,700 W
B&C 18SW115 8Ω
35–1500 Hz
- Fs
- 32Hz
- Xmax
- 14mm
- SPL
- 95dB
- Pe
- 1700W
- BL
- 30.3T·m
- Vd
- 1694cm³
- Qts
- 0.30
- Vas
- 187L
Published graphs
B&C 18SW115 is an 18-inch 8 ohm LF driver rated at 1700 W RMS. The validated T/S data includes Fs 32 Hz, Qts 0.30, Vas 187 L, Xmax 14 mm, sensitivity 94.9 dB, plus 1694 cm³ Vd and 100 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 £435.33.
The published T/S values agree with each other
Thiele/Small
- Fs
- 32Hz
- Qts
- 0.30
- Qes
- 0.32
- Qms
- 5.6
- Vas
- 187L
- Re
- 5.3Ω
- Le
- 1.90mH
Motor and cone
- BL
- 30.3T·m
- Sd
- 1210cm²
- Mms
- 275g
- Xmax
- 14mm
- Vd †
- 1694cm³
- Voice coil
- 116mm
- Flux density
- 1.16T
Power and response
- Sensitivity †
- 94.9dB
- Manufacturer sensitivity
- 97dB
- Power
- 1700W
- Nominal power
- 1700W
- Impedance
- 8Ω
- Min. impedance
- 6.5Ω
- Range
- 35–1500Hz
- EBP †
- 100 · Sealed or vented
Size and mounting
- Diameter
- 460mm
- Cutout
- 425mm
- Bolt circle
- 443mm
- Depth
- 242mm
- Weight
- 11.9kg
Sensitivity shows 94.9 dB, calculated from the T/S values. B&C publishes 97.0 dB, 2.1 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else B&C lists
LF
- BL
- 30.3T·m
- Fs
- 32Hz
- Le
- 1.90mH
- Re
- 5.3Ω
- Sd
- 1210cm²
- Mms
- 275g
- Qes
- 0.32
- Qms
- 5.6
- Qts
- 0.30
- SPL
- 94.9dB
- Vas
- 187L
- Xmax
- 14mm
- Power
- 1700W
- Impedance
- 8Ω
- Flux density
- 1.16T
- Sensitivity
- 97dB
- Low limit
- 35Hz
- Nominal power
- 1700W
- Calculated sensitivity †
- 94.9dB
- High limit
- 1500Hz
- Manufacturer sensitivity
- 97dB
- Min. impedance
- 6.5Ω
- Voice coil
- 116mm
- Weight
- 11.9kg
- Diameter
- 460mm
- Depth
- 242mm
- Cutout
- 425mm
- Bolt circle
- 443mm
- Bl
- 30.3 Tm
- Fs
- 32 Hz
- Le
- 1.9 mH
- Re
- 5.3 Ω
- Sd
- 1210 cm² (187.6 in²)
- Ebp
- 100 Hz
- Mms
- 275 g
- Qes
- 0.32
- Qms
- 5.6
- Qts
- 0.3
- Vas
- 187 dm³ (6.5 ft³)
- Η0
- 1.9 %
- Cone
- RCK18SW1158
- 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
- 97 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
- 6.5 Ω
- Nominal impedance
- 8 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
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
£435.33
Fs
32 Hz
Qts
0.30
Vas
187 L
BL
30.3 T·m
Xmax
14 mm
Sensitivity
94.9 dB
Power
1700 W
B&C18TBW100
£230.57 · 47% less, betterFs33 Hz +3%
Qts0.32 +7%
Vas181.5 L –
BL22.8 T·m −25%, worse
Xmax12 mm −14%, worse
Sensitivity94.9 dB –
FaitalPRO18HP1022
£269.33 · 38% less, betterFs35 Hz +9%
Qts0.30 –
Vas204.9 L +10%
BL28 T·m −8%
Xmax9.5 mm −32%, worse
Sensitivity96.6 dB +1.7
CIARENDH18-4S
£291.62 · 33% less, betterFs31 Hz −3%
Qts0.32 +7%
Vas239 L +28%, worse
BL27.7 T·m −9%
Xmax11.5 mm −18%, worse
Sensitivity95.4 dB +0.5
Eighteen Sound18LW2600
£300.67 · 31% less, betterFs31 Hz −3%
Qts0.29 −3%
Vas187 L –
BL31 T·m –
Xmax14.8 mm +6%
Sensitivity94.7 dB –
RCFLF18N405
£325.54 · 25% less, betterFs30 Hz −6%
Qts0.32 +7%
Vas227 L +21%, worse
BL26.5 T·m −13%, worse
Xmax14 mm –
Sensitivity94.6 dB –
SB AudienceNERO-18SW1100D
£338.74 · 22% less, betterFs36 Hz +13%, worse
Qts0.33 +10%, worse
Vas153.1 L −18%, better
BL30.9 T·m –
Xmax12.2 mm −13%, worse
Sensitivity95.3 dB –
B&C18DS100
£350.64 · 19% less, betterFs34 Hz +6%
Qts0.29 −3%
Vas155 L −17%, better
BL30 T·m –
Xmax14.5 mm +4%
Sensitivity95.1 dB –
RCFLF18X451
£360.00 · 17% less, betterFs30 Hz −6%
Qts0.28 −7%
Vas220 L +18%, worse
BL30.5 T·m –
Xmax14 mm –
Sensitivity95.1 dB –
Eighteen Sound18NLW4100
£376.05 · 14% less, betterFs31 Hz −3%
Qts0.34 +13%, worse
Vas180 L −4%
BL29 T·m −4%
Xmax15 mm +7%
Sensitivity93.9 dB −1
CelestionTSQ1845
£385.36 · 11% less, betterFs35 Hz +9%
Qts0.29 −3%
Vas119.3 L −36%, better
BL33.8 T·m +12%, better
Xmax15 mm +7%
Sensitivity94.3 dB −0.6
CelestionCF18VJD
£399.00 · 8% less, betterFs35 Hz +8%
Qts0.31 +3%
Vas145.8 L −22%, better
BL32.6 T·m +8%
Xmax12 mm −14%, worse
Sensitivity94.6 dB –
Precision DevicesPD.1852/2
£399.00 · 8% less, betterFs42 Hz +31%, worse
Qts0.33 +10%, worse
Vas120.4 L −36%, better
BL30.5 T·m –
Xmax12 mm −14%, worse
Sensitivity96.2 dB +1.3
MonacorCF18VJD/8
£448.03 · 3% moreFs35 Hz +8%
Qts0.31 +3%
Vas145.8 L −22%, better
BL32.6 T·m +8%
Xmax12 mm −14%, worse
Sensitivity94.6 dB –
Eighteen Sound18NLW4500
£474.29 · 9% more, worseFs35 Hz +9%
Qts0.33 +10%, worse
Vas151 L −19%, better
BL30.3 T·m –
Xmax15.3 mm +9%
Sensitivity94.8 dB –
FaitalPRO18XL1700
£475.00 · 9% more, worseFs28 Hz −13%, better
Qts0.28 −7%
Vas227 L +21%, worse
BL30.5 T·m –
Xmax16.2 mm +16%, better
Sensitivity94.4 dB −0.5
Eighteen Sound18NLW9601
£549.67 · 26% more, worseFs39 Hz +22%, worse
Qts0.28 −7%
Vas120 L −36%, better
BL31 T·m –
Xmax14 mm –
Sensitivity95.8 dB +0.9
Eighteen Sound18NLW9000
£550.00 · 26% more, worseFs34 Hz +6%
Qts0.31 +3%
Vas206 L +10%, worse
BL28 T·m −8%
Xmax14 mm –
Sensitivity96.1 dB +1.2
Eighteen Sound18NTLW5000
£550.00 · 26% more, worseFs32 Hz –
Qts0.32 +7%
Vas176 L −6%
BL31.3 T·m +3%
Xmax17.5 mm +25%, better
Sensitivity94.5 dB –
B&C18HTX100
£809.86 · 86% more, worseFs44 Hz +38%, worse
Qts0.32 +7%
Vas173 L −7%
BL26.3 T·m −13%, worse
Xmax13 mm −7%
Sensitivity98.4 dB +3.5, better
Oberton18NXB1600
No current priceFs32 Hz –
Qts0.30 –
Vas173.1 L −7%
BL29.6 T·m –
Xmax13.5 mm −4%
Sensitivity94.5 dB –
VAS Audio18-1700FC
No current priceFs33 Hz +3%
Qts0.29 –
Vas181 L −3%
BL33 T·m +9%
Xmax13.5 mm −4%
Sensitivity95.4 dB +0.5
No photo
FaneIMPERIUM 18NDXL
No current priceFs33 Hz +3%
Qts0.29 –
Vas203 L +9%
BL29.4 T·m –
Xmax12 mm −14%, worse
Sensitivity95.9 dB +1
Oberton18XB1301DS
No current priceFs36 Hz +12%, worse
Qts0.30 –
Vas172.9 L −8%
BL26.9 T·m −11%, worse
Xmax12 mm −14%, worse
Sensitivity96 dB +1.1
Oberton18NXB1601
No current priceFs35 Hz +8%
Qts0.29 −5%
Vas146.2 L −22%, better
BL30.5 T·m –
Xmax12.5 mm −11%, worse
Sensitivity95.1 dB –
VAS Audio18-1700NC
No current priceFs32 Hz –
Qts0.28 −7%
Vas178 L −5%
BL34.4 T·m +14%, better
Xmax13.5 mm −4%
Sensitivity95.1 dB –
No photo
Precision DevicesPD.1845-1N
No current priceFs34 Hz +7%
Qts0.32 +8%
Vas179.0 L −4%
BL26.4 T·m −13%, worse
Xmax16 mm +14%, better
Sensitivity95.3 dB –
Oberton18NXB1200
No current priceFs36 Hz +12%, worse
Qts0.28 −6%
Vas159.6 L −15%, better
BL29.4 T·m −3%
Xmax11.5 mm −18%, worse
Sensitivity96 dB +1.1
RCFLF18N408
No current priceFs30 Hz −6%
Qts0.33 +10%, worse
Vas193 L +3%
BL25.7 T·m −15%, worse
Xmax15 mm +7%
Sensitivity93.6 dB −1.3
Oberton18XB700
No current priceFs36 Hz +13%, worse
Qts0.30 –
Vas183.2 L –
BL26.1 T·m −14%, worse
Xmax9 mm −36%, worse
Sensitivity96.4 dB +1.5
Oberton18XB1600V2
No current priceFs33 Hz –
Qts0.28 −7%
Vas267 L +43%, worse
BL29.6 T·m –
Xmax12.5 mm −11%, worse
Sensitivity97.1 dB +2.2, better
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
- Thomann4.9 out of 511 ratings · Checked 9 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 |
|---|---|---|---|---|
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 | 8 in stock | Visit shop at Blue Aran |
Thomann | £444.00 | 1.9% above the lowest price | In stock | Visit shop at Thomann |
Audio Video Parts Import VAT and duty may apply | £383.71 | Special order | Visit shop at Audio Video Parts |
Best price over time
Tracked since 1 Apr
Recent changes
- 4 OctThomann£449.00 → £444.00Down 1.1% from £449.00
- 2 SepThomann£444.00 → £449.00Up 1.1% from £444.00
- 17 AugThomann£449.00 → £444.00Down 1.1% from £449.00