- 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 8Ω
45–1500 Hz
£209.86
SteadyJP Leisure · In stock · All 11 offers
- Fs
- 42Hz
- Xmax
- 9mm
- SPL
- 92dB
- Pe
- 1000W
- BL
- 25.5T·m
- Vd
- 478cm³
- Qts
- 0.26
- Vas
- 38L
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 7ff7b48a34a7…Medium confidence6,804 selected pixels of 8,681 - Trace datasheet-response-trace-poc/v2
free-air impedance
Impedance response
240 plotted pointsSource file SHA-256 7ff7b48a34a7…Medium confidence4,694 selected pixels of 6,282
Published graphs
B&C 12TBX100 is a 12-inch 8 ohm LF driver rated at 1000 W RMS. The validated T/S data includes Fs 42 Hz, Qts 0.26, Vas 37.5 L, Xmax 9 mm, sensitivity 92.2 dB, plus 478 cm³ Vd and 156 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 £202.02.
The published T/S values agree with each other
Thiele/Small
- Fs
- 42Hz
- Qts
- 0.26
- Qes
- 0.27
- Qms
- 6.9
- Vas
- 37.5L
- Re
- 5.1Ω
- Le
- 1.60mH
Motor and cone
- BL
- 25.5T·m
- Sd
- 531cm²
- Mms
- 119g
- Xmax
- 9mm
- Vd †
- 478cm³
- Voice coil
- 100mm
- Flux density
- 1.10T
Power and response
- Sensitivity †
- 92.2dB
- Manufacturer sensitivity
- 95dB
- Power
- 1000W
- Nominal power
- 1000W
- Impedance
- 8Ω
- Min. impedance
- 6.3Ω
- Range
- 45–1500Hz
- EBP †
- 156 · Leans vented
Size and mounting
- Diameter
- 319mm
- Cutout
- 281mm
- Bolt circle
- 299mm
- Depth
- 135mm
- Weight
- 11.8kg
Sensitivity shows 92.2 dB, calculated from the T/S values. B&C publishes 95.0 dB, 2.8 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else B&C lists
LF
- BL
- 25.5T·m
- Fs
- 42Hz
- Le
- 1.60mH
- Re
- 5.1Ω
- Sd
- 531cm²
- Mms
- 119g
- Qes
- 0.27
- Qms
- 6.9
- Qts
- 0.26
- SPL
- 92.2dB
- Vas
- 37.5L
- Xmax
- 9mm
- Power
- 1000W
- Impedance
- 8Ω
- Flux density
- 1.10T
- Sensitivity
- 95dB
- Low limit
- 45Hz
- Nominal power
- 1000W
- Calculated sensitivity †
- 92.2dB
- High limit
- 1500Hz
- Manufacturer sensitivity
- 95dB
- Min. impedance
- 6.3Ω
- Voice coil
- 100mm
- Weight
- 11.8kg
- Diameter
- 319mm
- Depth
- 135mm
- Cutout
- 281mm
- Bolt circle
- 299mm
- Bl
- 25.5 Tm
- Fs
- 42 Hz
- Le
- 1.6 mH
- Re
- 5.1 Ω
- Sd
- 531 cm² (82.3 in²)
- Ebp
- 156 Hz
- Mms
- 119 g
- Qes
- 0.27
- Qms
- 6.9
- Qts
- 0.26
- Vas
- 37.5 dm³ (1.3 ft³)
- Η0
- 1.15 %
- Cone
- RCK12TBX1008
- 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
- 95 dB
- Flux density
- 1.1 T
- Shipping box
- 360x360x200 mm (14.17x14.17x7.87 in)
- Winding depth
- 25 mm (1 in)
- Shipping units
- 1 pcs
- 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
- 6.3 Ω
- Nominal impedance
- 8 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
£202.02
Fs
42 Hz
Qts
0.26
Vas
37.5 L
BL
25.5 T·m
Xmax
9 mm
Sensitivity
92.2 dB
Power
1000 W
FaitalPRO12FH530
£177.40 · 12% less, betterFs45 Hz +7%
Qts0.26 –
Vas74.1 L +98%, worse
BL18.9 T·m −26%, worse
Xmax7.5 mm −17%, worse
Sensitivity96 dB +3.8, better
RCFMB12X351
£187.93 · 7% less, betterFs55 Hz +31%, worse
Qts0.26 –
Vas46 L +23%, worse
BL22.5 T·m −12%, worse
Xmax7 mm −22%, worse
Sensitivity96.6 dB +4.4, better
PRV Audio12MR2000X
£188.24 · 7% less, betterFs65 Hz +54%, worse
Qts0.28 +8%
Vas39.6 L +6%
BL23.2 T·m −9%
Xmax6.6 mm −27%, worse
Sensitivity97.9 dB +5.7, better
B&C12PS100
£190.15 · 6% less, betterFs44 Hz +5%
Qts0.27 +4%
Vas47 L +25%, worse
BL22.5 T·m −12%, worse
Xmax8 mm −11%, worse
Sensitivity93.4 dB +1.2
Beyma12LEX1000FE
£203.63 · Same priceFs49 Hz +17%, worse
Qts0.30 +15%, worse
Vas38.4 L –
BL24.6 T·m −4%
Xmax11 mm +22%, better
Sensitivity93.5 dB +1.3
BMS12S330
£204.98 · 1% moreFs29 Hz −32%, better
Qts0.24 −8%
Vas85.5 L +128%, worse
BL23 T·m −10%
Xmax8 mm −11%, worse
Sensitivity91.1 dB −1.1
B&C12NDL88
£215.61 · 7% more, worseFs51 Hz +21%, worse
Qts0.27 +4%
Vas52 L +39%, worse
BL19.9 T·m −22%, worse
Xmax8 mm −11%, worse
Sensitivity95.8 dB +3.6, better
FaitalPRO12HP1020
£235.97 · 17% more, worseFs55 Hz +31%, worse
Qts0.27 +4%
Vas38.6 L –
BL24.3 T·m −5%
Xmax9 mm –
Sensitivity95.6 dB +3.4, better
B&C12NBX100
£246.00 · 22% more, worseFs41 Hz –
Qts0.22 −15%, better
Vas51 L +36%, worse
BL25.6 T·m –
Xmax10 mm +11%, better
Sensitivity93.7 dB +1.5
FaitalPRO12FX600
£247.20 · 22% more, worseFs48 Hz +14%, worse
Qts0.24 −8%
Vas44.4 L +18%, worse
BL25.3 T·m –
Xmax9.9 mm +10%, better
Sensitivity95 dB +2.8, better
FaitalPRO12HP1030
£250.40 · 24% more, worseFs45 Hz +7%
Qts0.30 +15%, worse
Vas35.9 L −4%
BL24.3 T·m −5%
Xmax12.4 mm +38%, better
Sensitivity92.3 dB –
B&C12NW100
£252.95 · 25% more, worseFs42 Hz –
Qts0.20 −23%, better
Vas44 L +17%, worse
BL28 T·m +10%
Xmax9 mm –
Sensitivity93.9 dB +1.7
FaitalPRO12HP1060
£260.09 · 29% more, worseFs45 Hz +7%
Qts0.28 +8%
Vas36.9 L –
BL24.8 T·m –
Xmax12.4 mm +38%, better
Sensitivity92.7 dB +0.5
Beyma12P1000ND
£305.27 · 51% more, worseFs47 Hz +12%, worse
Qts0.26 –
Vas49 L +31%, worse
BL23.5 T·m −8%
Xmax8 mm −11%, worse
Sensitivity94.8 dB +2.6, better
Eighteen Sound12NLW9410
£336.13 · 66% more, worseFs42 Hz –
Qts0.26 –
Vas55 L +47%, worse
BL21.7 T·m −15%, worse
Xmax11 mm +22%, better
Sensitivity93.8 dB +1.6
Beyma12LEX1300ND
£360.37 · 78% more, worseFs45 Hz +7%
Qts0.24 −8%
Vas43 L +15%, worse
BL26.4 T·m +4%
Xmax11 mm +22%, better
Sensitivity94 dB +1.8
B&C12SW115
£369.80 · 83% more, worseFs38 Hz −10%
Qts0.25 −4%
Vas34 L −9%
BL30.3 T·m +19%, better
Xmax13.5 mm +50%, better
Sensitivity90.6 dB −1.6
Sica12 S 4 PL
£407.39 · 102% more, worseFs40 Hz −4%
Qts0.25 −4%
Vas57 L +52%, worse
BL23.5 T·m −8%
Xmax7.5 mm −17%, worse
Sensitivity93.6 dB +1.4
Sica12 PFS 4
No current priceFs39 Hz −7%
Qts0.26 –
Vas55.6 L +48%, worse
BL23.9 T·m −6%
Xmax9 mm –
Sensitivity92.9 dB +0.7
Sica12 SR 4 CP
No current priceFs38 Hz −10%
Qts0.30 +15%, worse
Vas41.7 L +11%, worse
BL24 T·m −6%
Xmax9 mm –
Sensitivity90.7 dB −1.5
Oberton12NB601
No current priceFs50 Hz +20%, worse
Qts0.30 +17%, worse
Vas38.7 L +3%
BL22.9 T·m −10%, worse
Xmax8.8 mm –
Sensitivity94 dB +1.8
Sica12 K 4 PL
No current priceFs49 Hz +15%, worse
Qts0.25 −4%
Vas47.4 L +26%, worse
BL22.9 T·m −10%, worse
Xmax7 mm −22%, worse
Sensitivity95 dB +2.8, better
No photo
PHL Audio4310NDU
No current priceFs43 Hz –
Qts0.27 +4%
Vas56.7 L +51%, worse
BL22 T·m −14%, worse
Xmax10 mm +11%, better
Sensitivity94.1 dB +1.9
Oberton12MB35
No current priceFs51 Hz +22%, worse
Qts0.27 –
Vas50.1 L +34%, worse
BL20.5 T·m −20%, worse
Xmax6.8 mm −25%, worse
Sensitivity96 dB +3.8, better
Sica12 PNS 4
No current priceFs42 Hz –
Qts0.31 +19%, worse
Vas50.2 L +34%, worse
BL22.3 T·m −13%, worse
Xmax9.5 mm +6%
Sensitivity92.6 dB –
CelestionFTR12-4075F
No current priceFs37 Hz −12%, better
Qts0.27 +5%
Vas89.2 L +138%, worse
BL12.6 T·m −51%, worse
Xmax9 mm –
Sensitivity94 dB +1.8
Audio Technology12 D 77 25 10 KAP
No current priceFs19 Hz −55%, better
Qts0.25 −4%
Vas340 L +807%, worse
BL14 T·m −45%, worse
Xmax8.6 mm −4%
Sensitivity91.6 dB −0.6
No photo
PHL Audio4031
No current priceFs44 Hz +5%
Qts0.27 +4%
Vas70 L +87%, worse
BL20.5 T·m −20%, worse
Xmax7.5 mm −17%, worse
Sensitivity95.2 dB +3, better
No photo
PHL Audio4031NDU
No current priceFs44 Hz +5%
Qts0.27 +4%
Vas70 L +87%, worse
BL20.5 T·m −20%, worse
Xmax7.5 mm −17%, worse
Sensitivity95.2 dB +3, better
Precision DevicesPD.124NR1-LR
No current priceFs45 Hz +7%
Qts0.23 −13%, better
Vas78 L +108%, worse
BL22 T·m −14%, worse
Xmax8.5 mm −6%
Sensitivity96.9 dB +4.7, 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 | |
JP Leisure Not currently listed · Last seen 7 Aug 2026 | £209.86 | In stock | Visit shop at JP Leisure | |
JP Leisure | £209.86 | In stock | Visit shop at JP Leisure | |
Blue Aran 5-7 weeks | £211.00 | 0.5% above the lowest price | 22 in stock | Visit shop at Blue Aran |
Blue Aran 5-7 weeks | £211.00 | 0.5% above the lowest price | 6 in stock | Visit shop at Blue Aran |
Audio Video Parts Import VAT and duty may apply | £170.10 | Special order | Visit shop at Audio Video Parts | |
Parts Express Import VAT and duty may apply | £276.72 | 32% above the lowest price | 2 in stock | Visit shop at Parts Express |
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
- 23 JunJP Leisure£206.98 → £209.86Up 1.4% from £206.98