T/S Parameters
Valid
Fs38Hz
Qts0.30
Qes0.32
Qms4.5
Vas6.4L
Re3.8Ω
Le0.38mH
BL6.0Tm
Sd57cm²
Mms13g
Xmax8.8mm
SPL82dB
Power60W
Impedance4Ω
Min Impedance4.3Ω
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
PTT4.0X04-NFC-01
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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