- Net volume
- 40L
- Tuning
- 43Hz
B&C gives the volume and tuning; the port is sized for the driver when you open it.
12-inch LF driver · 12TBX series · 100 mm voice coil · 1,000 W
B&C 12TBX100 4Ω
45–1500 Hz
£209.86
SteadyJP Leisure · In stock · All 6 offers
- Fs
- 44Hz
- Xmax
- 9mm
- SPL
- 94dB
- Pe
- 1000W
- BL
- 22.9T·m
- Vd
- 478cm³
- Qts
- 0.23
- Vas
- 41L
Published graphs
B&C 12TBX100 is a 12-inch 4 ohm LF driver rated at 1000 W RMS. The validated T/S data includes Fs 44 Hz, Qts 0.23, Vas 41.1 L, Xmax 9 mm, sensitivity 93.7 dB, plus 478 cm³ Vd and 183 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 £207.11.
The published T/S values agree with each other
Thiele/Small
- Fs
- 44Hz
- Qts
- 0.23
- Qes
- 0.24
- Qms
- 6.2
- Vas
- 41.1L
- Re
- 3.6Ω
- Le
- 1.74mH
Motor and cone
- BL
- 22.9T·m
- Sd
- 531cm²
- Mms
- 125g
- Xmax
- 9mm
- Vd †
- 478cm³
- Voice coil
- 100mm
- Flux density
- 1.10T
Power and response
- Sensitivity †
- 93.7dB
- Manufacturer sensitivity
- 93dB
- Power
- 1000W
- Nominal power
- 1000W
- Impedance
- 4Ω
- Min. impedance
- 4.6Ω
- Range
- 45–1500Hz
- EBP †
- 183 · Leans vented
Size and mounting
- Diameter
- 319mm
- Cutout
- 281mm
- Bolt circle
- 299mm
- Depth
- 135mm
- Weight
- 11.8kg
† Calculated by bits from the published values
What this validation status means
Everything else B&C lists
LF
- BL
- 22.9T·m
- Fs
- 44Hz
- Le
- 1.74mH
- Re
- 3.6Ω
- Sd
- 531cm²
- Mms
- 125g
- Qes
- 0.24
- Qms
- 6.2
- Qts
- 0.23
- SPL
- 93.7dB
- Vas
- 41.1L
- Xmax
- 9mm
- Power
- 1000W
- Impedance
- 4Ω
- Flux density
- 1.10T
- Sensitivity
- 93dB
- Low limit
- 45Hz
- Nominal power
- 1000W
- Calculated sensitivity †
- 93.7dB
- High limit
- 1500Hz
- Manufacturer sensitivity
- 93dB
- Min. impedance
- 4.6Ω
- Voice coil
- 100mm
- Weight
- 11.8kg
- Diameter
- 319mm
- Depth
- 135mm
- Cutout
- 281mm
- Bolt circle
- 299mm
- Bl
- 22.91 Tm
- Fs
- 44 Hz
- Le
- 1.74 mH
- Re
- 3.6 Ω
- Sd
- 531 cm² (82.3 in²)
- Ebp
- 183 Hz
- Mms
- 125 g
- Qes
- 0.24
- Qms
- 6.23
- Qts
- 0.23
- Vas
- 41.1 dm³ (1.45 ft³)
- Η0
- 1.42 %
- Cone
- RCK12TBX1004
- Xmax
- 9 mm
- Xvar
- 11 mm
- Depth
- 135 mm (5.3 in)
- Spider
- Double Silicone
- Cone shape
- Radial
- Net weight
- 11.8 kg (26 lb)
- Pole design
- T-Pole
- Sensitivity
- 93 dB
- Flux density
- 1.1 T
- Shipping box
- 360x360x200 mm (14.17x14.17x7.87 in)
- Winding depth
- 25 mm (1 in)
- Surround shape
- Triple Roll
- Former material
- Glass Fibre
- Frequency range
- 45 Hz - 1500 Hz
- Magnet material
- Ferrite
- Shipping weight
- 12.7 kg (28 lb)
- Nominal diameter
- 320 mm (12 in)
- Overall diameter
- 319 mm (12.5 in)
- Winding material
- Copper
- Minimum impedance
- 4.6 Ω
- Nominal impedance
- 4 Ω
- Magnetic gap depth
- 12 mm (0.5 in)
- Recommended tuning
- 43 Hz
- Voice coil diameter
- 100 mm (4 in)
- Bolt circle diameter
- 299 mm (11.8 in)
- Recommended enclosure
- 40 dm³ (1.41 ft³)
- Woofer cone treatment
- TWP Waterproof Both Sides
- Baffle cutout diameter
- 281 mm (11.1 in)
- Nominal power handling
- 1000 W
- Continuous power handling
- 2000 W
- Flange and gasket thickness
- 13 mm (0.5 in)
- Air volume occupied by driver
- 4.2 dm³ (0.15 ft³)
B&C’s suggested box
From B&C’s 12TBX100 page
Open this box in 00 Simulator
Modelling the box in 00 Simulator…
03
Compare
Same-size drivers, compared with the 12TBX100. Clear differences are green when better and red when worse.
This driver12TBX100
Best price
£207.11
Fs
44 Hz
Qts
0.23
Vas
41.1 L
BL
22.9 T·m
Xmax
9 mm
Sensitivity
93.7 dB
Power
1000 W
Precision DevicesPD.121/2
£169.00 · 18% less, betterFs53 Hz +21%, worse
Qts0.23 –
Vas66.6 L +62%, worse
BL21.5 T·m −6%
Xmax2.7 mm −70%, worse
Sensitivity98.4 dB +4.7, better
Beyma12P80FE
£175.00 · 16% less, betterFs48 Hz +9%
Qts0.21 −9%
Vas61 L +48%, worse
BL23 T·m –
Xmax7.5 mm −17%, worse
Sensitivity96.9 dB +3.2, better
RCFMB12X351
£187.93 · 9% less, betterFs55 Hz +25%, worse
Qts0.26 +13%, worse
Vas46 L +12%, worse
BL22.5 T·m –
Xmax7 mm −22%, worse
Sensitivity96.6 dB +2.9, better
PRV Audio12MR2000X
£188.24 · 9% less, betterFs65 Hz +47%, worse
Qts0.28 +22%, worse
Vas39.6 L −4%
BL23.2 T·m –
Xmax6.6 mm −27%, worse
Sensitivity97.9 dB +4.2, better
B&C12PS100
£190.15 · 8% less, betterFs44 Hz –
Qts0.27 +17%, worse
Vas47 L +14%, worse
BL22.5 T·m –
Xmax8 mm −11%, worse
Sensitivity93.4 dB –
Dayton Audio12LF400-8
£195.19 · 6% less, betterFs28 Hz −36%, better
Qts0.21 −9%
Vas147.8 L +260%, worse
BL21.8 T·m −5%
Xmax9.3 mm –
Sensitivity93.7 dB –
B&C12NDL88
£204.88 · 1% lessFs48 Hz +9%
Qts0.24 +4%
Vas57 L +39%, worse
BL16.6 T·m −28%, worse
Xmax8 mm −11%, worse
Sensitivity96 dB +2.3, better
BMS12S330
£204.98 · 1% lessFs29 Hz −35%, better
Qts0.24 +4%
Vas85.5 L +108%, worse
BL23 T·m –
Xmax8 mm −11%, worse
Sensitivity91.1 dB −2.6, worse
Beyma12MC700ND
£217.96 · 5% more, worseFs51 Hz +16%, worse
Qts0.24 +4%
Vas58 L +41%, worse
BL21.6 T·m −6%
Xmax7 mm −22%, worse
Sensitivity96.7 dB +3, better
B&C12NBX100
£218.91 · 6% more, worseFs40 Hz −9%
Qts0.22 −4%
Vas46.5 L +13%, worse
BL23.0 T·m –
Xmax10 mm +11%, better
Sensitivity93.1 dB −0.6
FaitalPRO12HP1020
£235.97 · 14% more, worseFs55 Hz +25%, worse
Qts0.27 +17%, worse
Vas38.6 L −6%
BL24.3 T·m +6%
Xmax9 mm –
Sensitivity95.6 dB +1.9
FaitalPRO12FX600
£247.20 · 19% more, worseFs48 Hz +9%
Qts0.24 +4%
Vas44.4 L +8%
BL25.3 T·m +10%, better
Xmax9.9 mm +10%, better
Sensitivity95 dB +1.3
B&C12NW100
£260.39 · 26% more, worseFs44 Hz –
Qts0.20 −13%, better
Vas43.3 L +5%
BL24.4 T·m +6%
Xmax9 mm –
Sensitivity94.5 dB +0.8
FaitalPRO12HP1060
£262.29 · 27% more, worseFs45 Hz –
Qts0.25 +9%
Vas33.8 L −18%, better
BL20.7 T·m −10%
Xmax12.4 mm +38%, better
Sensitivity92.8 dB −0.9
Beyma12P1000ND
£305.27 · 47% more, worseFs47 Hz +7%
Qts0.26 +13%, worse
Vas49 L +19%, worse
BL23.5 T·m –
Xmax8 mm −11%, worse
Sensitivity94.8 dB +1.1
Beyma12LEX1300ND
£360.37 · 74% more, worseFs45 Hz –
Qts0.24 +4%
Vas43 L +5%
BL26.4 T·m +15%, better
Xmax11 mm +22%, better
Sensitivity94 dB –
Sica12 S 4 PL
£407.39 · 97% more, worseFs40 Hz −8%
Qts0.25 +9%
Vas57 L +39%, worse
BL23.5 T·m –
Xmax7.5 mm −17%, worse
Sensitivity93.6 dB –
B&C12CXN88
£465.46 · 125% more, worseFs50 Hz +14%, worse
Qts0.22 −4%
Vas59 L +44%, worse
BL20.9 T·m −9%
Xmax10.5 mm +17%, better
Sensitivity97.1 dB +3.4, better
Precision DevicesPD.124NR1-LR
No current priceFs45 Hz –
Qts0.23 –
Vas78 L +90%, worse
BL22 T·m −4%
Xmax8.5 mm −6%
Sensitivity96.9 dB +3.2, better
Sica12 PFS 4
No current priceFs39 Hz −11%, better
Qts0.26 +13%, worse
Vas55.6 L +35%, worse
BL23.9 T·m +4%
Xmax9 mm –
Sensitivity92.9 dB −0.8
Sica12 K 4 PL
No current priceFs49 Hz +10%, worse
Qts0.25 +9%
Vas47.4 L +15%, worse
BL22.9 T·m –
Xmax7 mm −22%, worse
Sensitivity95 dB +1.3
No photo
PHL Audio4330NDU
No current priceFs36 Hz −18%, better
Qts0.22 −4%
Vas82.6 L +101%, worse
BL22 T·m −4%
Xmax8 mm −11%, worse
Sensitivity94.3 dB +0.6
RCFLF12P903
No current priceFs47 Hz +7%
Qts0.23 –
Vas65 L +58%, worse
BL22.1 T·m −3%
Xmax7 mm −22%, worse
Sensitivity96.5 dB +2.8, better
Sica12 SR 4 CP
No current priceFs38 Hz −14%, better
Qts0.30 +30%, worse
Vas41.7 L –
BL24 T·m +5%
Xmax9 mm –
Sensitivity90.7 dB −3, worse
Oberton12NB601
No current priceFs50 Hz +15%, worse
Qts0.30 +33%, worse
Vas38.7 L −6%
BL22.9 T·m –
Xmax8.8 mm –
Sensitivity94 dB –
B&C12SW115
No current priceFs39 Hz −11%, better
Qts0.25 +9%
Vas33 L −20%, better
BL23.8 T·m +4%
Xmax13.8 mm +53%, better
Sensitivity90.8 dB −2.9, worse
Oberton12B450
No current priceFs46 Hz +5%
Qts0.23 –
Vas71.8 L +75%, worse
BL19.3 T·m −16%, worse
Xmax7.8 mm −14%, worse
Sensitivity96.7 dB +3, better
RCFMB12N405
No current priceFs52 Hz +18%, worse
Qts0.20 −13%, better
Vas53 L +29%, worse
BL23.5 T·m –
Xmax7 mm −22%, worse
Sensitivity97.5 dB +3.8, better
No photo
PHL Audio4310NDU
No current priceFs43 Hz –
Qts0.27 +17%, worse
Vas56.7 L +38%, worse
BL22 T·m −4%
Xmax10 mm +11%, better
Sensitivity94.1 dB –
No photo
PHL Audio4071-1
No current priceFs47 Hz +7%
Qts0.24 +4%
Vas57.8 L +41%, worse
BL20.6 T·m −10%, worse
Xmax6.5 mm −28%, worse
Sensitivity95.7 dB +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
| Shop | Price | Against the lowest | Stock | Link |
|---|---|---|---|---|
JP Leisure | £209.86, the lowest price | In stock | Visit shop at JP Leisure | |
JP Leisure Not currently listed · Last seen 7 Aug 2026 | £209.86 | In stock | Visit shop at JP Leisure | |
Blue Aran 3-5 months | £211.00 | 0.5% above the lowest price | Usually available in 3-5 months | Visit shop at Blue Aran |
Audio Video Parts Import VAT and duty may apply | £179.87 | Special order | Visit shop at Audio Video Parts |
Best price over time
Tracked since 1 Apr
Recent changes
- 17 JulBlue Aran£215.00 → £211.00Down 1.9% from £215.00
- 23 JunJP Leisure£212.05 → £209.86Down 1.0% from £212.05
- 5 JunBlue Aran£208.99 → £215.00Up 2.9% from £208.99