T/S Parameters
Valid
Fs23Hz
Qts0.54
Qes0.58
Qms9.6
Vas16.8L
Re6.9Ω
Le1.90mH
BL19.5Tm
Sd1234cm²
Mms218g
Xmax7.8mm
SPL93dB
Power350W
Impedance8Ω
F Low25Hz
F High4000Hz
Voice Coil76mm
Pricing & availability
Price movement
Best current price
Updated 17 May 2026
soundimports
£112.56
inc VAT
Dimensions & Physical
Diameter408.2mm
Overall Depth190.0mm
Cutout Diameter422.9mm
Bolt Circle Diameter446.8mm
Similar Drivers
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Reference
GRS
18PT-8
18"
Best current price
£112.56
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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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