Hornresp
.txt · Hornresp driver database
Driver file ready to place in Hornresp’s Drivers folder.
Download for HornrespEighteen Sound 21NLW9601C 4Ω
LF DriverMedia
Overview
LF Driver
Eighteen Sound
Eighteen Sound 21NLW9601C
Eighteen Sound 21NLW9601C is a 21" 4 ohm LF driver rated at 1800W RMS. The validated T/S data includes Fs 38Hz, Qts 0.29, Vas 140L, Xmax 14mm, sensitivity 96dB, plus 2327cm³ Vd and 123 EBP. bits tracks UK vendor pricing, price movement, datasheet links, simulator import data, and similar drivers, with a current best price of £699.33.
Size
21"
Impedance
4Ω
RMS Power
1800W
Sensitivity
96.0dB
94.5dBmanufacturer; using T/S-derived value (1.5dB delta).
EBP
123
Vented alignment
Vd
2327cm³
Datasheet traces
Frequency and impedance curves traced from the manufacturer PDF.
frequency response240 ptsp2medium
Curve provenanceInspect 1 traceHide 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
240 plotted pointsMedium confidence5,471 selected pixels of 5,471
T/S Parameters
Valid
Fs38Hz
Qts0.29
Qes0.31
Qms6.3
Vas140.0L
Re2.9Ω
Le1.61mH
BL33.2Tm
Sd1662cm²
Mms460g
Xmax14.0mm
SPL96dB
Power1800W
Power Nominal1800W
Impedance4Ω
F Low33Hz
F High2000Hz
Pricing & availability
Price definitionsPrice movement
Other offers
2 vendorsleanaudio
Updated 11 Sept 2026· 4Ω
Source: inc VAT · 20%
£781.36
inc VAT
Back order
leanbusiness
Updated 17 May 2026· 4Ω
Source: inc VAT · 20%
£798.74
inc VAT
Best current price
Updated 17 May 2026
leanbusiness
£699.33
Avg £749.04£49.71 below avg (-6.6%)
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
Weight13.6kg
Diameter545.0mm
Overall Depth250.0mm
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
21NLW9601C
21"
Best current price
£699.33
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.
7 matches
Compare a specific driver
Added drivers stay at the front of the list, whatever the ranges say.
65%
Similarity
43% cheaper£399.00
Lavoce
SAN214.50
21"
Lower price
Xmax15.4mm+10%
Qts0.28-3%
BL39.6Tm+19%
Vas218.3L+56%
Qes0.29-6%
60%
Similarity
29% cheaper£497.00
B&C
21DS115
21"
Lower price
Xmax16.5mm+18%
Qts0.27-7%
BL39.3Tm+18%
Vas204L+46%
Qes0.28-10%
81%
Similarity
16% cheaper£585.00
B&C
21SW152
21"
Lower price
Xmax15mm+7%
Qts0.3+3%
BL32.5Tm-2%
Vas200L+43%
Qes0.310%
49%
Similarity
16% cheaper£585.00
B&C
21SW152
21"
Lower price
Xmax15mm+7%
Qts0.36+24%
BL39Tm+17%
Vas200L+43%
Qes0.38+23%
79%
Similarity
£699.33
Eighteen Sound
21NLW9601
21"
Xmax14mm0%
Qts0.290%
BL43Tm+30%
Vas175L+25%
Qes0.310%
Image unavailable
68%
Similarity
11% more£777.00
Precision Devices
PD.2160-1N
21"
Higher price
Xmax16mm+14%
Qts0.3+3%
BL43Tm+30%
Vas177L+26%
Qes0.310%
64%
Similarity
Eighteen Sound
21ID
21"
Xmax14mm0%
Qts0.23-21%
BL25.2Tm-24%
Vas143L+2%
Qes0.24-23%