Media
Auto-advancing
Size
4"
Impedance
8Ω
RMS Power
200W
Sensitivity
92dB
EBP
393
Vented alignment
Vd
22cm³
Frequency response
Manufacturer-provided response plots and related charts.
T/S Parameters
Valid
Fs110Hz
Qts0.27
Qes0.28
Qms4.2
Vas1.6L
Re5.5Ω
Le0.23mH
BL9.0Tm
Sd57cm²
Mms6g
Xmax3.8mm
SPL92dB
Power200W
Power Nominal100W
Impedance8Ω
Min Impedance6.4Ω
F Low110Hz
F High8000Hz
Voice Coil34mm
Flux Density1.25T
Pricing & availability
Price movement
Other offers
1 vendorjpleisure
Updated 17 May 2026· 8Ω
Source: ex VAT · 20%
£53.52
inc VAT
Best current price
Updated 17 May 2026
bluearan
£46.06
Avg £49.79£3.73 below avg (-7.5%)
inc VAT
Dimensions & Physical
Weight0.6kg
Diameter127.0mm
Overall Depth66.0mm
Cutout Diameter103.0mm
Bolt Circle Diameter115.0mm
Additional Manufacturer Specs
Bl9 Tm
Fs110 Hz
Le0.23 mH
Re5.5 Ω
Sd57 cm² (8.84 in²)
Ebp393 Hz
Mms6.1 g
Qes0.28
Qms4.2
Qts0.27
Vas1.6 dm³ (0.06 ft³)
η00.7 %
ConeRCK04NDF34
Xmax3.8 mm
Xvar5.7 mm
SpiderSingle
Cone ShapeExponential
Pole DesignT-Pole
Winding Depth11 mm (0.43 in)
Surround ShapeDouble Roll
Former MaterialGlass Fibre
Magnet MaterialNeodymium Inside Slug
Nominal Diameter100 mm (4 in)
Winding MaterialCopper
Magnetic Gap Depth7 mm (0.28 in)
Bolt Circle Diameter115 mm (4.53 in)
Woofer Cone TreatmentTWP Waterproof Both Sides
Baffle Cutout Diameter103 mm (4.06 in)
Flange And Gasket Thickness3 mm (0.12 in)
Air Volume Occupied By Driver0.25 dm³ (0.01 ft³)
Similar Drivers
Keep size fixed, then add or remove T/S params to change the ranking and the comparison rows.
Reference
B&C
4NDF34
4"
Best current price
£46.06
Compare on
Only active params are shown here. Size stays fixed automatically.
5 active T/S params, plus size.
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