FaitalPRO3FE22
£18.20 · 66% less, betterFs110 Hz +90%, worse
Qts0.36 –
Vas1.3 L −76%, better
BL3.7 T·m –
Xmax1.7 mm −23%, worse
Sensitivity88.4 dB +2.3, better
4-inch LF driver · SB12 series · 25 mm voice coil · 50 W
SB Acoustics SB12MNRX25-4 4Ω
4 Ω
£52.93
SteadySoundImports · 2 in stock · Ships from Netherlands · All 3 offers
- Fs
- 58Hz
- Xmax
- 2.3mm
- SPL
- 86dB
- Pe
- 50W
- BL
- 3.7T·m
- Vd
- 11cm³
- Qts
- 0.37
- Vas
- 6L
Manufacturer response and impedance data, with source and trace details below. The left and right arrow keys read every shown curve at a frequency, a twelfth of an octave at a time, or an octave with Shift. Escape clears the reading.
Curve provenanceInspect 3 traces
These plotted lines are Bits digitizations of manufacturer evidence, not new measurements. How provenance works
- Trace datasheet-response-trace-poc/v2
30 degrees
Frequency response
240 plotted pointsSource file SHA-256 4397cb5fb0c7…Medium confidence2,687 selected pixels of 4,149 - Trace datasheet-response-trace-poc/v2
60 degrees
Frequency response
240 plotted pointsSource file SHA-256 4397cb5fb0c7…Medium confidence1,782 selected pixels of 2,992 - Trace datasheet-response-trace-poc/v2
impedance
Impedance response
240 plotted pointsSource file SHA-256 4397cb5fb0c7…Medium confidence2,789 selected pixels of 8,408
Published graphs
SB Acoustics SB12MNRX25-4 is a 4-inch 4 ohm LF driver rated at 50 W RMS. The validated T/S data includes Fs 58 Hz, Qts 0.37, Vas 5.5 L, Xmax 2.3 mm, sensitivity 86.1 dB, plus 11 cm³ Vd and 138 EBP. bits tracks UK, EU and US shop prices, price movement, datasheet links, simulator import data, and similar drivers, with a current best price of £52.93.
The published T/S values agree with each other
Thiele/Small
- Fs
- 58Hz
- Qts
- 0.37
- Qes
- 0.42
- Qms
- 3.6
- Vas
- 5.5L
- Re
- 3.2Ω
- Le
- 0.14mH
Motor and cone
- BL
- 3.7T·m
- Sd
- 50cm²
- Mms
- 5g
- Xmax
- 2.3mm
- Vd †
- 11cm³
- Voice coil
- 25mm
- Flux density
- 0.90T
Power and response
- Sensitivity †
- 86.1dB
- Manufacturer sensitivity
- 88.5dB
- Power
- 50W
- Impedance
- 4Ω
- EBP †
- 138 · Leans vented
Size and mounting
- Weight
- 0.85kg
Other published values
- Cms
- 1.55mm/N
Sensitivity shows 86.1 dB, calculated from the T/S values. SB Acoustics publishes 88.5 dB, 2.4 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else SB Acoustics lists
LF · Primary · 4″
- BL
- 3.7T·m
- Fs
- 58Hz
- Le
- 0.14mH
- Re
- 3.2Ω
- Sd
- 50cm²
- Cms
- 1.55mm/N
- Mms
- 5g
- Qes
- 0.42
- Qms
- 3.6
- Qts
- 0.37
- SPL
- 86.1dB
- Vas
- 5.5L
- Xmax
- 2.3mm
- Power
- 50W
- Impedance
- 4Ω
- Flux density
- 0.90T
- Sensitivity
- 88.5dB
- Calculated sensitivity †
- 86.1dB
- Manufacturer sensitivity
- 88.5dB
- Voice coil
- 25mm
- Weight
- 0.85kg
02
Compare
Same-size drivers, compared with the SB12MNRX25-4. Clear differences are green when better and red when worse.
This driverSB12MNRX25-4
Best price
£52.93
Fs
58 Hz
Qts
0.37
Vas
5.5 L
BL
3.7 T·m
Xmax
2.3 mm
Sensitivity
86.1 dB
Power
50 W
Dayton AudioDSA90-8
£20.41 · 61% less, betterFs67 Hz +15%, worse
Qts0.37 –
Vas2.3 L −59%, better
BL4.6 T·m +25%, better
Xmax2.5 mm +11%, better
Sensitivity83.8 dB −2.3, worse
MonacorSP-100/8
£31.53 · 40% less, betterFs61 Hz +5%
Qts0.37 –
Vas4.7 L −15%, better
BL5.5 T·m +49%, better
Xmax2.5 mm +11%, better
Sensitivity85.9 dB –
LavoceFSN041.00
£34.72 · 34% less, betterFs114 Hz +97%, worse
Qts0.38 –
Vas1.8 L −67%, better
BL6.9 T·m +86%, better
Xmax2.2 mm –
Sensitivity90 dB +3.9, better
Dayton AudioRS125-4
£37.81 · 29% less, betterFs57 Hz –
Qts0.37 –
Vas5.3 L −4%
BL3.6 T·m –
Xmax4 mm +78%, better
Sensitivity85.5 dB −0.6
SB AcousticsSB12PFCR25-4-COAX
£41.40 · 22% less, betterFs58 Hz –
Qts0.33 −11%, better
Vas4.8 L −13%, better
BL3.8 T·m –
Xmax5 mm +122%, better
Sensitivity86.2 dB –
SB AcousticsSB12NRX25-4
£46.34 · 12% less, betterFs55 Hz −5%
Qts0.40 +8%
Vas5.6 L –
BL3.6 T·m –
Xmax10 mm +344%, better
Sensitivity85.1 dB −1
Tang BandW3-2141
£46.62 · 12% less, betterFs75 Hz +29%, worse
Qts0.39 +5%
Vas3.3 L −40%, better
BL3.6 T·m –
Xmax1.6 mm −29%, worse
Sensitivity86.8 dB +0.7
SB AcousticsSB12MNRX2-25-4
£47.06 · 11% less, betterFs64 Hz +9%
Qts0.32 −14%, better
Vas5.3 L −4%
BL3.9 T·m +5%
Xmax4.4 mm +96%, better
Sensitivity87.9 dB +1.8
WavecorWF118WA07
£47.66 · 10% less, betterFs56 Hz −3%
Qts0.36 –
Vas4.9 L −11%, better
BL4.5 T·m +22%, better
Xmax4 mm +78%, better
Sensitivity85.6 dB −0.5
Tang BandW4-1052SDF
£47.95 · 9% less, betterFs70 Hz +21%, worse
Qts0.42 +14%, worse
Vas5.2 L −5%
BL4.1 T·m +11%, better
Xmax2.6 mm +16%, better
Sensitivity87.9 dB +1.8
SB AcousticsSB12PFC25-4-COAX
£48.27 · 9% less, betterFs58 Hz –
Qts0.33 −11%, better
Vas4.8 L −13%, better
BL3.8 T·m –
Xmax5 mm +122%, better
Sensitivity86.2 dB –
SB AcousticsSB12NRX25-8
£52.51 · Same priceFs57 Hz –
Qts0.37 –
Vas5.3 L −4%
BL5.4 T·m +46%, better
Xmax10 mm +344%, better
Sensitivity85.8 dB –
SB AcousticsSB12PACR25-4-COAX
£53.19 · Same priceFs55 Hz −5%
Qts0.35 −5%
Vas4.3 L −22%, better
BL4 T·m +8%
Xmax5 mm +122%, better
Sensitivity84.8 dB −1.3
Tang BandW4-2142
£58.48 · 10% more, worseFs60 Hz +3%
Qts0.33 −11%, better
Vas6.4 L +17%, worse
BL5.4 T·m +46%, better
Xmax2.4 mm +7%
Sensitivity87.5 dB +1.4
Tang BandW4-1320SIF
£58.48 · 10% more, worseFs75 Hz +29%, worse
Qts0.36 –
Vas5.2 L −5%
BL5.3 T·m +44%, better
Xmax3 mm +33%, better
Sensitivity89.2 dB +3.1, better
Tang BandW4-1337SDF
£72.05 · 36% more, worseFs70 Hz +21%, worse
Qts0.34 −8%
Vas5.6 L –
BL5.3 T·m +44%, better
Xmax2.5 mm +11%, better
Sensitivity88.9 dB +2.8, better
VisatonW 130 X
£76.74 · 45% more, worseFs40 Hz −31%, better
Qts0.37 –
Vas5.6 L –
BL13.2 T·m +257%, better
Xmax11.5 mm +411%, better
Sensitivity81.5 dB −4.6, worse
WavecorWF120BD05
£82.45 · 56% more, worseFs52 Hz −10%, better
Qts0.43 +16%, worse
Vas5.3 L −4%
BL4.1 T·m +11%, better
Xmax4 mm +78%, better
Sensitivity84.2 dB −1.9
WavecorWF120BD11
£88.50 · 67% more, worseFs58 Hz –
Qts0.39 +5%
Vas3.8 L −31%, better
BL4.2 T·m +14%, better
Xmax3 mm +33%, better
Sensitivity84.7 dB −1.4
WavecorSW070WA01
£96.97 · 83% more, worseFs84 Hz +45%, worse
Qts0.39 +5%
Vas0.7 L −88%, better
BL3.9 T·m +4%
Xmax2.5 mm +11%, better
Sensitivity81.8 dB −4.3, worse
£339.00 · 540% more, worse
Fs45 Hz −22%, better
Qts0.36 –
Vas6 L +9%
BL5.4 T·m +46%, better
Xmax3 mm +33%, better
Sensitivity83.2 dB −2.9, worse
Tang BandW4-1320SMF
No current priceFs70 Hz +21%, worse
Qts0.36 –
Vas7.4 L +35%, worse
BL3.5 T·m −4%
Xmax2.4 mm +7%
Sensitivity89.7 dB +3.6, better
CIARENDI3.21
No current priceFs90 Hz +55%, worse
Qts0.38 –
Vas1.8 L −67%, better
BL4 T·m +8%
Xmax2 mm −11%, worse
Sensitivity86.8 dB +0.7
WavecorWF120BD06
No current priceFs48 Hz −17%, better
Qts0.40 +8%
Vas6.2 L +13%, worse
BL4.1 T·m +11%, better
Xmax4 mm +78%, better
Sensitivity84.2 dB −1.9
WavecorWF120BD12
No current priceFs57 Hz –
Qts0.38 –
Vas3.9 L −29%, better
BL4.2 T·m +14%, better
Xmax3 mm +33%, better
Sensitivity84.5 dB −1.6
VisatonW 130 X - 2 x 4 Ohm
No current priceFs40 Hz −31%, better
Qts0.37 –
Vas5.6 L –
BL13.2 T·m +257%, better
Xmax11.5 mm +411%, better
Sensitivity81.5 dB −4.6, worse
WavecorWF120BD04
No current priceFs62 Hz +6%
Qts0.37 –
Vas4.3 L −23%, better
BL4.5 T·m +22%, better
Xmax4 mm +78%, better
Sensitivity86 dB –
PurifiPTT4.0X08-NFC-01
No current priceFs41 Hz −29%, better
Qts0.37 –
Vas5.7 L +4%
BL6.9 T·m +86%, better
Xmax8.8 mm +291%, better
Sensitivity81.8 dB −4.3, worse
MonacorSPH-30X/4SW
No current priceFs105 Hz +81%, worse
Qts0.42 +14%, worse
Vas1.1 L −80%, better
BL3.9 T·m +6%
Xmax2 mm −11%, worse
Sensitivity87.2 dB +1.1
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
- SoundImports4.7 out of 53 ratings · Checked 12 Oct 2026Read reviews on SoundImports
Each shop collects its own ratings. Bits shows them as published and doesn't verify them.
| Shop | Price | Against the lowest | Stock | Link |
|---|---|---|---|---|
SoundImports Import VAT and duty may apply | £52.93, the lowest price | 2 in stock | Visit shop at SoundImports | |
RumoH Import VAT and duty may apply | £54.56 | 3.1% above the lowest price | Stock not listed | Visit shop at RumoH |
Best price over time
Tracked since 1 Apr