Media
Auto-advancing
Size
21"
Impedance
8Ω
RMS Power
1800W
EBP
94
Either alignment
Vd
2327cm³
T/S Parameters
Valid
Fs32Hz
Qts0.31
Qes0.34
Qms4.5
Vas244.0L
Re5.9Ω
Le3.10mH
BL37.0Tm
Sd1662cm²
Mms390g
Xmax14.0mm
Power1800W
Impedance8Ω
F Low25Hz
F High1500Hz
Pricing & availability
Price movement
Best current price
Updated 17 May 2026
leanbusiness
£576.21
inc VAT
Dimensions & Physical
Weight13.4kg
Diameter545.0mm
Overall Depth250.0mm
Cutout Diameter492.0mm
Bolt Circle Diameter520.0mm
Similar Drivers
Keep size fixed, then add or remove T/S params to change the ranking and the comparison rows.
Reference
Eighteen Sound
21NLW9001
21"
Best current price
£576.21
Compare on
Only active params are shown here. Size stays fixed automatically.
5 active T/S params, plus size.
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