T/S Parameters
Valid
Fs50Hz
Qts0.32
Qes0.34
Qms4.7
Vas4.9L
Re5.6Ω
Le0.36mH
BL7.0Tm
Sd57cm²
Mms10g
Xmax2.9mm
SPL83dB
Impedance8Ω
Min Impedance6.0Ω
Voice Coil30mm
Pricing & availability
Price movement
Best current price
Updated 17 May 2026
soundimports
£259.81
inc VAT
Dimensions & Physical
Weight1.3kg
Diameter125.0mm
Cutout Diameter101.0mm
Bolt Circle Diameter115.0mm
Similar Drivers
Keep size fixed, then add or remove T/S params to change the ranking and the comparison rows.
Reference
Purifi
PTT4.0M08-NAC-03
4"
Best current price
£259.81
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Only active params are shown here. Size stays fixed automatically.
5 active T/S params, plus size.
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