Media
Auto-advancing
Size
21"
Impedance
8Ω
RMS Power
1800W
EBP
82
Either alignment
Vd
2909cm³
T/S Parameters
Valid
Fs31Hz
Qts0.36
Qes0.38
Qms5.2
Vas270.0L
Re5.3Ω
Le1.60mH
BL32.0Tm
Sd1662cm²
Mms372g
Xmax17.5mm
Power1800W
Impedance8Ω
F Low30Hz
F High1800Hz
Pricing & availability
Price movement
Best current price
Updated 17 May 2026
leanbusiness
£595.00
inc VAT
Dimensions & Physical
Weight12.5kg
Diameter545.0mm
Overall Depth320.0mm
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
21NTLW5000
21"
Best current price
£595.00
Compare on
Only active params are shown here. Size stays fixed automatically.
5 active T/S params, plus size.
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