Hornresp
.txt · Hornresp driver database
Driver file ready to place in Hornresp’s Drivers folder.
Download for HornrespEighteen Sound 21NLW4100 8Ω
LF DriverMedia
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Overview
LF Driver
Eighteen Sound
Eighteen Sound 21NLW4100
Eighteen Sound 21NLW4100 is a 21" 8 ohm LF driver rated at 1500W RMS. The validated T/S data includes Fs 36Hz, Qts 0.46, Vas 210L, Xmax 15.2mm, sensitivity 95dB, plus 2525cm³ Vd and 73 EBP. bits tracks UK vendor pricing, price movement, datasheet links, simulator import data, and similar drivers, with a current best price of £380.00.
Size
21"
Impedance
8Ω
RMS Power
1500W
Sensitivity
95.0dB
97.0dBmanufacturer; using T/S-derived value (2.0dB delta).
EBP
73
Either alignment
Vd
2525cm³
Datasheet traces
Frequency and impedance curves traced from the manufacturer PDF.
frequency response132 ptsp2medium
Curve provenanceInspect 2 tracesHide details
These plotted lines are Bits digitizations of manufacturer evidence, not new measurements. How provenance works
- Trace datasheet-response-trace-poc/v1
frequency response
Frequency response
132 plotted pointsMedium confidence372 selected pixels of 543 - Trace datasheet-response-trace-poc/v1
impedance
Impedance response
240 plotted pointsMedium confidence745 selected pixels of 991
T/S Parameters
Valid
Fs36Hz
Qts0.46
Qes0.49
Qms7.8
Vas210.0L
Re5.1Ω
Le2.10mH
BL29.4Tm
Sd1661cm²
Mms374g
Xmax15.2mm
SPL95dB
Power1500W
Power Nominal1500W
Impedance8Ω
F Low32Hz
F High300Hz
Pricing & availability
Price definitionsPrice movement
Other offers
1 vendorleanaudio
Updated 11 Sept 2026· 8Ω
Source: inc VAT · 20%
£456.79
inc VAT
2 in stock
Best current price
Updated 17 May 2026
leanbusiness
£380.00
Avg £418.40£38.39 below avg (-9.2%)
inc VAT
Use this driver
Open it in 00 Simulator, download it for your enclosure tool, or copy the specification values.
Files use canonical values. Required mechanical fields are derived only where the target format needs them.
WinISD
.wdr · WinISD driver editor
Native WinISD driver record with the required SI conversions.
Download for WinISDBASTA!
.bastaelement · BASTA! loudspeaker simulator
Native BASTA! element file using its documented SI-unit fields.
Download for BASTA!VituixCAD
.wdr · VituixCAD 2 Enclosure
A WinISD driver file that VituixCAD imports directly.
Download for VituixCAD00 Simulator
Direct import · Web app
Start a new enclosure simulation with this driver already loaded.
Open in 00 SimulatorCopy spec sheet
Plain text · Clipboard
Copy the available values as a clean label-and-value list.
Dimensions & Physical
Weight10.5kg
Diameter545.0mm
Overall Depth245.0mm
Cutout Diameter492.0mm
Bolt Circle Diameter520.0mm
Similar Drivers
Size stays fixed. Tune the T/S ranges to change what counts as a match, or add a specific driver to compare it directly.
Reference
Eighteen Sound
21NLW4100
21"
Best current price
£380.00
Compare on
Matches sit inside every range. Size stays fixed automatically.
5 active T/S params, plus size. Pin a driver to open a side-by-side comparison.
8 matches
Compare a specific driver
Added drivers stay at the front of the list, whatever the ranges say.
80%
Similarity
13% more£428.34
BishopSound
BWN21/4
21"
Higher price
Xmax15mm-1%
Qts0.42-9%
BL32.6Tm+11%
Vas244.2L+16%
Qes0.46-7%
80%
Similarity
13% more£428.34
BishopSound
BWN21/8
21"
Higher price
Xmax15mm-1%
Qts0.42-9%
BL32.6Tm+11%
Vas244.2L+16%
Qes0.46-7%
58%
Similarity
27% more£481.99
B&C
21SW115
21"
Higher price
Xmax14mm-8%
Qts0.37-20%
BL30.1Tm+2%
Vas318L+51%
Qes0.39-20%
54%
Similarity
27% more£481.99
B&C
21SW115
21"
Higher price
Xmax14mm-8%
Qts0.36-22%
BL24.8Tm-16%
Vas278L+32%
Qes0.37-24%
Image unavailable
66%
Similarity
50% more£569.00
Precision Devices
PD.2155-1N
21"
Higher price
Xmax14mm-8%
Qts0.36-22%
BL30Tm+2%
Vas241L+15%
Qes0.37-24%
58%
Similarity
54% more£585.00
B&C
21SW152
21"
Higher price
Xmax15mm-1%
Qts0.36-22%
BL39Tm+33%
Vas200L-5%
Qes0.38-22%
55%
Similarity
57% more£595.00
Eighteen Sound
21NTLW5000
21"
Higher price
Xmax17.5mm+15%
Qts0.36-22%
BL32Tm+9%
Vas270L+29%
Qes0.38-22%
66%
Similarity
Fane
COLOSSUS PRIME 21NDXL
21"
Xmax14mm-8%
Qts0.36-22%
BL30Tm+2%
Vas241L+15%
Qes0.37-24%