- Net volume
- 140L
- Tuning
- 40Hz
B&C gives the volume and tuning; the port is sized for the driver when you open it.
18-inch LF driver · 18RBX series · 100 mm voice coil · 1,000 W
B&C 18RBX100 8Ω
35–1000 Hz
£226.58
SteadyJP Leisure · In stock · All 6 offers
- Fs
- 40Hz
- Xmax
- 10mm
- SPL
- 98dB
- Pe
- 1000W
- BL
- 25.1T·m
- Vd
- 1225cm³
- Qts
- 0.34
- Vas
- 220L
Published graphs
B&C 18RBX100 is an 18-inch 8 ohm LF driver rated at 1000 W RMS. The validated T/S data includes Fs 40 Hz, Qts 0.34, Vas 220 L, Xmax 10 mm, sensitivity 98 dB, plus 1225 cm³ Vd and 111 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 £226.58.
The published T/S values agree with each other
Thiele/Small
- Fs
- 40Hz
- Qts
- 0.34
- Qes
- 0.36
- Qms
- 7.3
- Vas
- 220L
- Re
- 5.1Ω
- Le
- 1.50mH
Motor and cone
- BL
- 25.1T·m
- Sd
- 1225cm²
- Mms
- 199g
- Xmax
- 10mm
- Vd †
- 1225cm³
- Voice coil
- 100mm
- Flux density
- 1.10T
Power and response
- Sensitivity †
- 98dB
- Manufacturer sensitivity
- 97dB
- Power
- 1000W
- Nominal power
- 1000W
- Impedance
- 8Ω
- Min. impedance
- 6.2Ω
- Range
- 35–1000Hz
- EBP †
- 111 · Leans vented
Size and mounting
- Diameter
- 460mm
- Cutout
- 422mm
- Bolt circle
- 440mm
- Depth
- 200mm
- Weight
- 12.1kg
Sensitivity shows 98.0 dB, calculated from the T/S values. B&C publishes 97.0 dB, 1.0 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else B&C lists
LF
- BL
- 25.1T·m
- Fs
- 40Hz
- Le
- 1.50mH
- Re
- 5.1Ω
- Sd
- 1225cm²
- Mms
- 199g
- Qes
- 0.36
- Qms
- 7.3
- Qts
- 0.34
- SPL
- 98dB
- Vas
- 220L
- Xmax
- 10mm
- Power
- 1000W
- Impedance
- 8Ω
- Flux density
- 1.10T
- Sensitivity
- 97dB
- Low limit
- 35Hz
- Nominal power
- 1000W
- Calculated sensitivity †
- 98dB
- High limit
- 1000Hz
- Manufacturer sensitivity
- 97dB
- Min. impedance
- 6.2Ω
- Voice coil
- 100mm
- Weight
- 12.1kg
- Diameter
- 460mm
- Depth
- 200mm
- Cutout
- 422mm
- Bolt circle
- 440mm
- Bl
- 25.1 Tm
- Fs
- 40 Hz
- Le
- 1.5 mH
- Re
- 5.1 Ω
- Sd
- 1225 cm² (189.88 in²)
- Ebp
- 111 Hz
- Mms
- 199 g
- Qes
- 0.36
- Qms
- 7.3
- Qts
- 0.34
- Vas
- 220 dm³ (7.77 ft³)
- Η0
- 2.2 %
- Cone
- RCK18RBX1008
- Xmax
- 10 mm
- Xvar
- 13 mm
- Depth
- 200 mm (7.87 in)
- Spider
- Double Silicone
- Cone shape
- Curvilinear
- Net weight
- 12.05 kg (26.57 lb)
- Pole design
- T-Pole
- Sensitivity
- 97 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
- 13.65 kg (30.09 lb)
- Nominal diameter
- 460 mm (18 in)
- Overall diameter
- 460 mm (18.11 in)
- Winding material
- Copper
- Minimum impedance
- 6.2 Ω
- Nominal impedance
- 8 Ω
- Magnetic gap depth
- 11 mm (0.43 in)
- Recommended tuning
- 40 Hz
- Voice coil diameter
- 100 mm (4 in)
- Bolt circle diameter
- 440 mm (17.32 in)
- Recommended enclosure
- 140 dm³ (4.94 ft³)
- Woofer cone treatment
- TWP Waterproof Both Sides
- Baffle cutout diameter
- 422 mm (16.61 in)
- Nominal power handling
- 1000 W
- Continuous power handling
- 2000 W
- Flange and gasket thickness
- 14 mm (0.55 in)
- Air volume occupied by driver
- 10.5 dm³ (0.37 ft³)
B&C’s suggested box
From B&C’s 18RBX100 page
Open this box in 00 Simulator
Modelling the box in 00 Simulator…
03
Compare
Same-size drivers, compared with the 18RBX100. Clear differences are green when better and red when worse.
This driver18RBX100
Best price
£226.58
Fs
40 Hz
Qts
0.34
Vas
220 L
BL
25.1 T·m
Xmax
10 mm
Sensitivity
98 dB
Power
1000 W
B&C18TBX100
£186.47 · 18% less, betterFs34 Hz −15%, better
Qts0.35 –
Vas212 L −4%
BL25.5 T·m –
Xmax9 mm −10%, worse
Sensitivity95.6 dB −2.4, worse
B&C18PZW100
£223.03 · 2% lessFs37 Hz −8%
Qts0.36 +6%
Vas186 L −15%, better
BL25.5 T·m –
Xmax8 mm −20%, worse
Sensitivity96 dB −2, worse
RCFL18P300
£225.00 · Same priceFs33 Hz −18%, better
Qts0.33 –
Vas226 L –
BL23.5 T·m −6%
Xmax8 mm −20%, worse
Sensitivity95.8 dB −2.2, worse
Beyma18LEX1000FE
£225.00 · Same priceFs34 Hz −15%, better
Qts0.38 +12%, worse
Vas250 L +14%, worse
BL23.8 T·m −5%
Xmax11 mm +10%, better
Sensitivity96 dB −2, worse
FaitalPRO18HP1060
£245.81 · 8% more, worseFs35 Hz −13%, better
Qts0.37 +9%
Vas200.3 L −9%
BL24.8 T·m –
Xmax12.4 mm +24%, better
Sensitivity95.6 dB −2.4, worse
Beyma18P1000FEV2S
£249.00 · 10% more, worseFs33 Hz −18%, better
Qts0.32 −6%
Vas230 L +5%
BL26.8 T·m +7%
Xmax8 mm −20%, worse
Sensitivity96 dB −2, worse
B&C18NBX100
£265.28 · 17% more, worseFs35 Hz −13%, better
Qts0.38 +12%, worse
Vas198 L −10%, better
BL24.8 T·m –
Xmax10 mm –
Sensitivity95.3 dB −2.7, worse
FaitalPRO18HP1022
£268.65 · 19% more, worseFs35 Hz −13%, better
Qts0.30 −12%, better
Vas204.9 L −7%
BL28 T·m +12%, better
Xmax9.5 mm −5%
Sensitivity96.6 dB −1.4
Eighteen Sound18LW2400
£272.63 · 20% more, worseFs35 Hz −13%, better
Qts0.31 −9%
Vas230 L +5%
BL25.6 T·m –
Xmax9.5 mm −5%
Sensitivity96.9 dB −1.1
FaitalPRO18FX600
£277.94 · 23% more, worseFs32 Hz −20%, better
Qts0.30 −12%, better
Vas257.3 L +17%, worse
BL24.5 T·m –
Xmax11.3 mm +13%, better
Sensitivity96.4 dB −1.6
Beyma18LEX1200ND
£278.64 · 23% more, worseFs36 Hz −10%, better
Qts0.33 –
Vas219 L –
BL26.4 T·m +5%
Xmax11 mm +10%, better
Sensitivity96.7 dB −1.3
Eighteen Sound18LW2420
£279.00 · 23% more, worseFs32 Hz −20%, better
Qts0.33 –
Vas252 L +15%, worse
BL25.3 T·m –
Xmax10 mm –
Sensitivity95.8 dB −2.2, worse
FaneCOLOSSUS 18SB
£284.00 · 25% more, worseFs36 Hz −10%, better
Qts0.35 –
Vas199 L −10%
BL24 T·m −4%
Xmax8.3 mm −18%, worse
Sensitivity96.1 dB −1.9
CIARENDH18-4S
£291.62 · 29% more, worseFs31 Hz −23%, better
Qts0.32 −6%
Vas239 L +9%
BL27.7 T·m +10%, better
Xmax11.5 mm +15%, better
Sensitivity95.4 dB −2.6, worse
Dayton Audio18SW1200N-8
£304.09 · 34% more, worseFs32 Hz −20%, better
Qts0.33 –
Vas253.6 L +15%, worse
BL27.6 T·m +10%
Xmax9.1 mm −9%
Sensitivity95.8 dB −2.2, worse
BMS18S430V2
£316.72 · 40% more, worseFs31 Hz −23%, better
Qts0.34 –
Vas262 L +19%, worse
BL23.5 T·m −6%
Xmax8 mm −20%, worse
Sensitivity95.4 dB −2.6, worse
RCFLF18N405
£325.54 · 44% more, worseFs30 Hz −25%, better
Qts0.32 −6%
Vas227 L +3%
BL26.5 T·m +6%
Xmax14 mm +40%, better
Sensitivity94.6 dB −3.4, worse
FaitalPRO18XL1600
£399.95 · 77% more, worseFs32 Hz −20%, better
Qts0.36 +6%
Vas211.4 L −4%
BL26.7 T·m +6%
Xmax12.9 mm +29%, better
Sensitivity94.8 dB −3.2, worse
BMS18N850V2
£457.13 · 102% more, worseFs30 Hz −26%, better
Qts0.33 –
Vas243 L +10%, worse
BL25.4 T·m –
Xmax12 mm +20%, better
Sensitivity94.7 dB −3.3, worse
Sica18 S 4 CP
No current priceFs33 Hz −18%, better
Qts0.35 –
Vas225 L –
BL23.5 T·m −6%
Xmax11 mm +10%, better
Sensitivity95.2 dB −2.8, worse
Precision DevicesPD.184C002
No current priceFs40 Hz –
Qts0.34 –
Vas268 L +22%, worse
BL21 T·m −16%, worse
Xmax9.7 mm −3%
Sensitivity98.8 dB +0.8
FaneCOLOSSUS 18XB
No current priceFs33 Hz −18%, better
Qts0.34 –
Vas236 L +7%
BL25.9 T·m +3%
Xmax7.5 mm −25%, worse
Sensitivity95.8 dB −2.2, worse
Sica18 PFS 4
No current priceFs29 Hz −28%, better
Qts0.37 +9%
Vas245.9 L +12%, worse
BL24.6 T·m –
Xmax9.5 mm −5%
Sensitivity93.5 dB −4.5, worse
BMS18N840
No current priceFs30 Hz −25%, better
Qts0.37 +9%
Vas261 L +19%, worse
BL23 T·m −8%
Xmax10 mm –
Sensitivity94.6 dB −3.4, worse
Oberton18XB1201
No current priceFs38 Hz −5%
Qts0.32 −7%
Vas159.4 L −28%, better
BL26.7 T·m +6%
Xmax10.5 mm +5%
Sensitivity96.3 dB −1.7
RCFLF18N408
No current priceFs30 Hz −25%, better
Qts0.33 –
Vas193 L −12%, better
BL25.7 T·m –
Xmax15 mm +50%, better
Sensitivity93.6 dB −4.4, worse
CelestionERPROX18
No current priceFs35 Hz −13%, better
Qts0.38 +11%, worse
Vas188.9 L −14%, better
BL24.4 T·m –
Xmax9.5 mm −5%
Sensitivity94.7 dB −3.3, worse
Oberton18B450
No current priceFs34 Hz −14%, better
Qts0.34 –
Vas241.6 L +10%
BL22.1 T·m −12%, worse
Xmax7.3 mm −28%, worse
Sensitivity96.4 dB −1.6
Oberton18XB700
No current priceFs36 Hz −10%
Qts0.30 −11%, better
Vas183.2 L −17%, better
BL26.1 T·m +4%
Xmax9 mm −10%, worse
Sensitivity96.4 dB −1.6
REDCATT186FIND
No current priceFs33 Hz −18%, better
Qts0.35 –
Vas174.2 L −21%, better
BL30.2 T·m +20%, better
Xmax8.4 mm −16%, worse
Sensitivity94.4 dB −3.6, worse
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 | £226.58, the lowest price | In stock | Visit shop at JP Leisure | |
JP Leisure Not currently listed · Last seen 7 Aug 2026 | £226.58 | In stock | Visit shop at JP Leisure | |
Blue Aran | £233.00 | 2.8% above the lowest price | 1 in stock | Visit shop at Blue Aran |
Audio Video Parts Import VAT and duty may apply | £182.20 | Special order | Visit shop at Audio Video Parts | |
Parts Express Import VAT and duty may apply | £281.25 | 24% above the lowest price | Back order | Visit shop at Parts Express |
Best price over time
Tracked since 1 Apr
Recent changes
- 23 JunJP Leisure£216.62 → £226.58Up 4.6% from £216.62