Media
Auto-advancing
Size
12"
Impedance
4Ω
RMS Power
2000W
Sensitivity
94dB
EBP
174
Vented alignment
Vd
531cm³
Frequency response
Manufacturer-provided response plots and related charts.
T/S Parameters
Valid
Fs40Hz
Qts0.22
Qes0.23
Qms7.0
Vas46.5L
Re3.6Ω
Le1.35mH
BL23.0Tm
Sd531cm²
Mms133g
Xmax10.0mm
SPL94dB
Power2000W
Power Nominal1000W
Impedance4Ω
Min Impedance4.5Ω
F Low40Hz
F High1500Hz
Voice Coil100mm
Flux Density1.10T
Pricing & availability
Price movement
Other offers
2 vendorsthomann
Updated 28 Apr 2026
Source: inc VAT · 20%
£249.00
inc VAT
jpleisure
Updated 17 May 2026· 4Ω
Source: ex VAT · 20%
£251.21
inc VAT
Best current price
Updated 17 May 2026
bluearan
£249.00
Avg £249.74£0.74 below avg (-0.3%)
inc VAT
Dimensions & Physical
Weight8.3kg
Diameter320.0mm
Overall Depth143.0mm
Cutout Diameter280.0mm
Bolt Circle Diameter300.0mm
Additional Manufacturer Specs
Bl23.04 Tm
Fs40 Hz
Le1.35 mH
Re3.6 Ω
Sd531 cm² (82 in²)
Ebp174 Hz
Mms133 g
Qes0.23
Qms7.05
Qts0.22
Vas46.5 dm³ (1.64 ft³)
η01.27 %
ConeRCK12NBX1004
Xmax10 mm
Xvar10 mm
SpiderDouble Silicone
Cone ShapeExponential
Pole DesignT-Pole
Winding Depth25 mm (1 in)
Surround ShapeTriple Roll
Former MaterialGlass Fibre
Magnet MaterialNeodymium Inside Slug
Nominal Diameter320 mm (12 in)
Winding MaterialCopper
Magnetic Gap Depth11 mm (0.43 in)
Recommended Tuning50 Hz
Bolt Circle Diameter300 mm (11.8 in)
Recommended Enclosure40 dm³ (1.41 ft³)
Woofer Cone TreatmentTWP Waterproof Both Sides
Baffle Cutout Diameter280 mm (11 in)
Flange And Gasket Thickness12 mm (0.47 in)
Air Volume Occupied By Driver4 dm³ (0.14 ft³)
Similar Drivers
Keep size fixed, then add or remove T/S params to change the ranking and the comparison rows.
Reference
B&C
12NBX100
12"
Best current price
£249.00
Compare on
Only active params are shown here. Size stays fixed automatically.
5 active T/S params, plus size.
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