T/S Parameters
Valid
Fs29Hz
Qts0.27
Qes0.28
Qms5.9
Vas11.8L
Re3.6Ω
Le0.37mH
BL7.9Tm
Sd85cm²
Mms26g
Xmax9.8mm
SPL82dB
Power70W
Impedance4Ω
Min Impedance4.3Ω
Voice Coil39mm
Pricing & availability
Price movement
Best current price
Updated 17 May 2026
soundimports
£346.43
inc VAT
Dimensions & Physical
Weight1.8kg
Diameter147.0mm
Cutout Diameter121.0mm
Bolt Circle Diameter138.0mm
Similar Drivers
Keep size fixed, then add or remove T/S params to change the ranking and the comparison rows.
Reference
Purifi
PTT5.25X04-NAA-05
5.25"
Best current price
£346.43
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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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