Media
Auto-advancing
Size
21"
Impedance
8Ω
RMS Power
1500W
EBP
73
Either alignment
Vd
2525cm³
T/S Parameters
Valid
Fs36Hz
Qts0.46
Qes0.49
Qms7.8
Vas210.0L
Re5.1Ω
Le2.10mH
BL29.4Tm
Sd1661cm²
Mms374g
Xmax15.2mm
Power1500W
Impedance8Ω
F Low32Hz
F High300Hz
Pricing & availability
Price movement
Best current price
Updated 17 May 2026
leanbusiness
£380.00
inc VAT
Dimensions & Physical
Weight10.5kg
Diameter545.0mm
Overall Depth245.0mm
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
21NLW4100
21"
Best current price
£380.00
Compare on
Only active params are shown here. Size stays fixed automatically.
5 active T/S params, plus size.
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