Hornresp
.txt · Hornresp driver database
Driver file ready to place in Hornresp’s Drivers folder.
Download for HornrespEighteen Sound 12NMB420 8Ω
LF DriverMedia
Overview
LF Driver
Eighteen Sound
Eighteen Sound 12NMB420
Eighteen Sound 12NMB420 is a 12" 8 ohm LF driver rated at 300W RMS. The validated T/S data includes Fs 53Hz, Qts 0.28, Vas 105L, Xmax 4mm, sensitivity 99.2dB, plus 212cm³ Vd and 177 EBP. bits tracks UK vendor pricing, price movement, datasheet links, simulator import data, and similar drivers, with a current best price of £187.96.
Size
12"
Impedance
8Ω
RMS Power
300W
Sensitivity
99.2dB
100.5dBmanufacturer; using T/S-derived value (1.3dB delta).
EBP
177
Vented alignment
Vd
212cm³
Datasheet traces
Frequency and impedance curves traced from the manufacturer PDF.
impedance240 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
impedance
Impedance response
240 plotted pointsMedium confidence968 selected pixels of 968
T/S Parameters
Valid
Fs53Hz
Qts0.28
Qes0.30
Qms3.6
Vas105.0L
Re5.2Ω
Le0.20mH
BL13.9Tm
Sd531cm²
Mms34g
Xmax4.0mm
SPL99dB
Power300W
Power Nominal300W
Impedance8Ω
F Low55Hz
F High6000Hz
Pricing & availability
Price definitionsPrice movement
Other offers
1 vendorleanaudio
Updated 11 Sept 2026· 8Ω
Source: inc VAT · 20%
£187.96
inc VAT
2 in stock
Best current price
Updated 17 May 2026
leanbusiness
£187.96
Avg £187.96£0.00 vs avg (+0.0%)
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
Weight3.0kg
Diameter315.0mm
Overall Depth127.0mm
Cutout Diameter282.0mm
Bolt Circle Diameter296.0mm
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
12NMB420
12"
Best current price
£187.96
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.
12 matches
Compare a specific driver
Added drivers stay at the front of the list, whatever the ranges say.
51%
Similarity
60% cheaper£75.52
Lavoce
WSF122.50
12"
Lower price
Xmax4.7mm+18%
Qts0.33+18%
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Vas70.2L-33%
Qes0.35+17%
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Dayton Audio
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Xmax5mm+25%
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BL18Tm+29%
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B&C
12CL64
12"
Lower price
Xmax4.5mm+13%
Qts0.3+7%
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37% cheaper£118.34
Eminence
KAPPA-12A
12"
Lower price
Xmax3.2mm-20%
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BL15.2Tm+9%
Vas112.1L+7%
Qes0.28-7%
54%
Similarity
37% cheaper£118.34
Eminence
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Lower price
Xmax4.6mm+15%
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Vas81.7L-22%
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65%
Similarity
27% cheaper£136.93
B&C
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12"
Lower price
Xmax5mm+25%
Qts0.29+4%
BL15.5Tm+12%
Vas64L-39%
Qes0.32+7%
44%
Similarity
23% cheaper£145.00
Celestion
TN1230
12"
Lower price
Xmax3.8mm-6%
Qts0.35+25%
BL18.6Tm+33%
Vas64.3L-39%
Qes0.37+23%
42%
Similarity
20% cheaper£151.02
B&C
12PLB76
12"
Lower price
Xmax5mm+25%
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BL18.6Tm+34%
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92%
Similarity
23% more£230.40
Eighteen Sound
12NDA520
12"
Higher price
Xmax4mm0%
Qts0.27-4%
BL14.4Tm+4%
Vas111L+6%
Qes0.28-7%
74%
Similarity
55% more£291.66
B&C
12FHX76
12"
Higher price
Xmax4mm0%
Qts0.33+18%
BL14.4Tm+4%
Vas88L-16%
Qes0.36+20%
53%
Similarity
56% more£294.14
B&C
12FCX76
12"
Higher price
Xmax5mm+25%
Qts0.34+21%
BL15.6Tm+12%
Vas82L-22%
Qes0.35+17%
76%
Similarity
CIARE
PWA12.64
12"
Xmax4.3mm+7%
Qts0.3+7%
BL13.7Tm-1%
Vas57L-46%
Qes0.31+3%