Hornresp
.txt · Hornresp driver database
Driver file ready to place in Hornresp’s Drivers folder.
Download for HornrespSB Acoustics SB12NRX25-4 4Ω
LF DriverMedia
Overview
LF DriverSB12 series
SB Acoustics
SB Acoustics SB12NRX25-4
SB Acoustics SB12NRX25-4 is a 4" 4 ohm LF driver rated at 30W RMS. The validated T/S data includes Fs 55Hz, Qts 0.40, Vas 5.6L, Xmax 10mm, sensitivity 85.1dB, plus 50cm³ Vd and 120 EBP. bits tracks UK vendor pricing, price movement, datasheet links, simulator import data, and similar drivers, with a current best price of £45.28.
Size
4"
Impedance
4Ω
RMS Power
30W
Sensitivity
85.1dB
87.5dBmanufacturer; using T/S-derived value (2.4dB delta).
EBP
120
Vented alignment
Vd
50cm³
Datasheet traces
Frequency and impedance curves traced from the manufacturer PDF.
30 degrees240 ptsp1medium
60 degrees202 ptsp1medium
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
30 degrees
Frequency response
240 plotted pointsMedium confidence2,421 selected pixels of 3,642 - Trace datasheet-response-trace-poc/v1
60 degrees
Frequency response
202 plotted pointsMedium confidence1,025 selected pixels of 2,818
T/S Parameters
Valid
Fs55Hz
Qts0.40
Qes0.46
Qms3.2
Vas5.6L
Re3.1Ω
Le0.14mH
BL3.6Tm
Sd50cm²
Mms6g
Xmax10.0mm
SPL85dB
Power30W
Impedance4Ω
Voice Coil25mm
Flux Density0.84T
Pricing & availability
Price definitionsPrice movement
Other offers
4 vendorsleanaudio
Updated 11 Sept 2026· 4Ω
Source: inc VAT · 20%
£46.34
inc VAT
In stock
leanbusiness
Updated 17 May 2026· 4Ω
Source: inc VAT · 20%
£46.38
inc VAT
soundimports
Updated 11 Sept 2026· 4Ω
Source: inc VAT
£51.51
inc VAT
Out of stock
willyshifi
Updated 11 Sept 2026· 4Ω
Source: inc VAT · 20%
£55.95
inc VAT
Best current price
Updated 17 May 2026
leanbusiness
£45.28
Avg £48.49£3.21 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
Weight0.8kg
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
SB Acoustics
SB12NRX25-4
4"
Best current price
£45.28
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.
5 matches
Compare a specific driver
Added drivers stay at the front of the list, whatever the ranges say.
64%
Similarity
58% cheaper£19.19
SB Acoustics
SB12PFCR25-8
4"
Lower price
Xmax10mm0%
Qts0.48+20%
BL4.6Tm+28%
Vas5.3L-5%
Qes0.55+20%
62%
Similarity
48% cheaper£23.67
SB Acoustics
SB12PAC25-4
4"
Lower price
Xmax10mm0%
Qts0.31-23%
BL4.3Tm+21%
Vas5.3L-5%
Qes0.33-28%
62%
Similarity
48% cheaper£23.67
SB Acoustics
SB12PACR25-4
4"
Lower price
Xmax10mm0%
Qts0.31-23%
BL4.3Tm+21%
Vas5.3L-5%
Qes0.33-28%
88%
Similarity
43% cheaper£25.95
SB Acoustics
SB12PFCR25-4
4"
Lower price
Xmax9.8mm-2%
Qts0.43+7%
BL3.5Tm-3%
Vas5.2L-7%
Qes0.49+7%
63%
Similarity
29% more£58.31
SB Acoustics
SB12CACS25-4
4"
Higher price
Xmax10mm0%
Qts0.31-23%
BL4.3Tm+19%
Vas5.7L+2%
Qes0.33-28%