Hornresp
.txt · Hornresp driver database
Driver file ready to place in Hornresp’s Drivers folder.
Download for HornrespSB Acoustics SB12MNRX2-25-4 4Ω
LF DriverMedia
Overview
LF DriverSB12 series
SB Acoustics
SB Acoustics SB12MNRX2-25-4
SB Acoustics SB12MNRX2-25-4 is a 4" 4 ohm LF driver rated at 50W RMS. The validated T/S data includes Fs 64Hz, Qts 0.32, Vas 5.3L, Xmax 4.4mm, sensitivity 87.9dB, plus 22cm³ Vd and 181 EBP. bits tracks UK vendor pricing, price movement, datasheet links, simulator import data, and similar drivers, with a current best price of £47.06.
Size
4"
Impedance
4Ω
RMS Power
50W
Sensitivity
87.9dB
90.5dBmanufacturer; using T/S-derived value (2.6dB delta).
EBP
181
Vented alignment
Vd
22cm³
Datasheet traces
Frequency and impedance curves traced from the manufacturer PDF.
impedance240 ptsp1medium
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 confidence2,212 selected pixels of 4,450
T/S Parameters
Valid
Fs64Hz
Qts0.32
Qes0.35
Qms4.2
Vas5.3L
Re3.2Ω
Le0.15mH
BL3.9Tm
Sd50cm²
Mms4g
Xmax4.4mm
SPL88dB
Power50W
Impedance4Ω
Voice Coil25mm
Flux Density1.03T
Pricing & availability
Price definitionsPrice movement
Other offers
3 vendorsleanbusiness
Updated 17 May 2026· 4Ω
Source: inc VAT · 20%
£47.06
inc VAT
soundimports
Updated 11 Sept 2026· 4Ω
Source: inc VAT
£53.23
inc VAT
Out of stock
willyshifi
Updated 11 Sept 2026· 4Ω
Source: inc VAT · 20%
£58.95
inc VAT
Best current price
Updated 11 Sept 2026
leanaudio
£47.06
Avg £51.02£3.96 below avg (-7.8%)
inc VAT·2 in stock
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
Weight0.9kg
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
SB12MNRX2-25-4
4"
Best current price
£47.06
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.
6 matches
Compare a specific driver
Added drivers stay at the front of the list, whatever the ranges say.
56%
Similarity
75% cheaper£11.82
Dayton Audio
TCP115-4
4"
Lower price
Xmax4mm-9%
Qts0.35+9%
BL5.2Tm+33%
Vas3.1L-42%
Qes0.4+14%
53%
Similarity
21% cheaper£36.97
Dayton Audio
RS125-4
5"
Lower price
Xmax4mm-9%
Qts0.37+16%
BL3.6Tm-7%
Vas5.3L0%
Qes0.45+29%
Image unavailable
65%
Similarity
Wavecor
WF118WA07
4.5"
Xmax4mm-9%
Qts0.36+12%
BL4.5Tm+15%
Vas4.9L-8%
Qes0.38+9%
58%
Similarity
Wavecor
WF120BD04
4.5"
Xmax4mm-9%
Qts0.37+16%
BL4.5Tm+15%
Vas4.3L-20%
Qes0.4+14%
52%
Similarity
Tang Band
W3-1878
3"
Xmax4mm-9%
Qts0.28-12%
BL4.3Tm+10%
Vas3.1L-42%
Qes0.34-3%
Image unavailable
45%
Similarity
Wavecor
SW118WA01
4.5"
Xmax4mm-9%
Qts0.39+22%
BL4.7Tm+21%
Vas3.3L-38%
Qes0.41+17%