PeerlessSDS-100F25CP09-04
£12.90 · 41% less, betterFs80 Hz +36%, worse
Qts0.53 +10%, worse
Vas2.0 L −63%, better
BL4.7 T·m –
Xmax5.0 mm –
Sensitivity84.4 dB −0.6
4-inch LF driver · SB12 series · 25 mm voice coil · 30 W
SB Acoustics SB12PFCR25-8 8Ω
8 Ω
£26.02
19%Willys-Hifi · All 4 offers
- Fs
- 59Hz
- Xmax
- 5mm
- SPL
- 85dB
- Pe
- 30W
- BL
- 4.6T·m
- Vd
- 25cm³
- Qts
- 0.48
- Vas
- 5L
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 1 trace
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 confidence1,544 selected pixels of 2,978
Published graphs
SB Acoustics SB12PFCR25-8 is a 4-inch 8 ohm LF driver rated at 30 W RMS. The validated T/S data includes Fs 59 Hz, Qts 0.48, Vas 5.3 L, Xmax 5 mm, sensitivity 85 dB, plus 25 cm³ Vd and 107 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 £21.99.
The published T/S values agree with each other
Thiele/Small
- Fs
- 59Hz
- Qts
- 0.48
- Qes
- 0.55
- Qms
- 3.6
- Vas
- 5.3L
- Re
- 6.4Ω
- Le
- 0.36mH
Motor and cone
- BL
- 4.6T·m
- Sd
- 50cm²
- Mms
- 5g
- Xmax
- 5mm
- Vd †
- 25cm³
- Voice coil
- 25mm
- Flux density
- 0.84T
Power and response
- Sensitivity †
- 85dB
- Manufacturer sensitivity
- 84dB
- Power
- 30W
- Impedance
- 8Ω
- EBP †
- 107 · Leans vented
Size and mounting
- Weight
- 0.7kg
Other published values
- Cms
- 1.48mm/N
Sensitivity shows 85.0 dB, calculated from the T/S values. SB Acoustics publishes 84.0 dB, 1.0 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else SB Acoustics lists
LF · Primary · 4″
- BL
- 4.6T·m
- Fs
- 59Hz
- Le
- 0.36mH
- Re
- 6.4Ω
- Sd
- 50cm²
- Cms
- 1.48mm/N
- Mms
- 5g
- Qes
- 0.55
- Qms
- 3.6
- Qts
- 0.48
- SPL
- 85dB
- Vas
- 5.3L
- Xmax
- 5mm
- Power
- 30W
- Impedance
- 8Ω
- Flux density
- 0.84T
- Sensitivity
- 84dB
- Calculated sensitivity †
- 85dB
- Manufacturer sensitivity
- 84dB
- Voice coil
- 25mm
- Weight
- 0.7kg
02
Compare
Same-size drivers, compared with the SB12PFCR25-8. Clear differences are green when better and red when worse.
This driverSB12PFCR25-8
Best price
£21.99
Fs
59 Hz
Qts
0.48
Vas
5.3 L
BL
4.6 T·m
Xmax
5 mm
Sensitivity
85 dB
Power
30 W
PeerlessSDS-P830855
£14.02 · 36% less, betterFs66 Hz +12%, worse
Qts0.48 –
Vas3.3 L −38%, better
BL5.2 T·m +14%, better
Xmax5.0 mm –
Sensitivity84.4 dB −0.6
MonacorSP-60/8
£18.26 · 17% less, betterFs65 Hz +10%, worse
Qts0.49 –
Vas6 L +13%, worse
BL4.1 T·m −11%, worse
Xmax2 mm −60%, worse
Sensitivity86.1 dB +1.1
Dayton AudioND91-8
£20.92 · 5% lessFs71 Hz +20%, worse
Qts0.47 –
Vas1.5 L −71%, better
BL5.6 T·m +22%, better
Xmax5.1 mm –
Sensitivity82.1 dB −2.9, worse
FaitalPRO5FE100
£21.52 · 2% lessFs65 Hz +10%, worse
Qts0.45 −6%
Vas5.7 L +8%
BL6.9 T·m +50%, better
Xmax5.3 mm +5%
Sensitivity87.2 dB +2.2, better
SB AcousticsSB12PFCR25-4
£21.74 · 1% lessFs58 Hz –
Qts0.43 −10%, better
Vas5.2 L –
BL3.5 T·m −24%, worse
Xmax4.9 mm –
Sensitivity85.2 dB –
FaitalPRO5FE105
£21.90 · Same priceFs65 Hz +10%, worse
Qts0.45 −6%
Vas5.7 L +8%
BL6.9 T·m +50%, better
Xmax5.3 mm +5%
Sensitivity87.2 dB +2.2, better
SB AcousticsSB12PFC25-4
£21.99 · Same priceFs58 Hz –
Qts0.43 −10%, better
Vas5.2 L –
BL3.5 T·m −24%, worse
Xmax5 mm –
Sensitivity85.2 dB –
SB AcousticsSB12PFC25-8
£21.99 · Same priceFs64 Hz +8%
Qts0.56 +17%, worse
Vas4.3 L −19%, better
BL4.5 T·m –
Xmax5 mm –
Sensitivity84.4 dB −0.6
FaitalPRO5FE120
£24.49 · 11% more, worseFs65 Hz +10%, worse
Qts0.48 –
Vas5.4 L –
BL6.9 T·m +50%, better
Xmax5.3 mm +5%
Sensitivity86.7 dB +1.7
FaitalPRO5FE125
£28.90 · 31% more, worseFs65 Hz +10%, worse
Qts0.48 –
Vas5.4 L –
BL6.9 T·m +50%, better
Xmax5.3 mm +5%
Sensitivity86.7 dB +1.7
Dayton AudioRS125P-8
£37.37 · 70% more, worseFs70 Hz +19%, worse
Qts0.44 −8%
Vas4.0 L −25%, better
BL5.1 T·m +10%, better
Xmax4 mm −20%, worse
Sensitivity86.1 dB +1.1
Dayton AudioRS125P-4
£37.37 · 70% more, worseFs70 Hz +19%, worse
Qts0.48 –
Vas4.0 L −25%, better
BL3.5 T·m −24%, worse
Xmax4 mm −20%, worse
Sensitivity85.8 dB +0.8
SB AcousticsSB12NRXF25-4
£45.28 · 106% more, worseFs61 Hz +3%
Qts0.48 –
Vas4.1 L −23%, better
BL3.6 T·m −22%, worse
Xmax5 mm –
Sensitivity84.5 dB −0.5
SB AcousticsSB12NRXF25-8
£45.28 · 106% more, worseFs63 Hz +7%
Qts0.42 −13%, better
Vas4.2 L −21%, better
BL5.5 T·m +20%, better
Xmax5 mm –
Sensitivity85.6 dB +0.6
SB AcousticsSB12NRX25-4
£46.34 · 111% more, worseFs55 Hz −7%
Qts0.40 −17%, better
Vas5.6 L +6%
BL3.6 T·m −22%, worse
Xmax5 mm –
Sensitivity85.1 dB –
Beyma5MP60
£52.34 · 138% more, worseFs63 Hz +7%
Qts0.46 −4%
Vas5.8 L +9%
BL6.4 T·m +39%, better
Xmax5.5 mm +10%, better
Sensitivity86 dB +1
VisatonB 100
£73.97 · 236% more, worseFs75 Hz +27%, worse
Qts0.52 +8%
Vas5.3 L –
BL4.1 T·m −11%, worse
Xmax1.6 mm −67%, worse
Sensitivity88.2 dB +3.2, better
WavecorWF120BD05
£81.49 · 271% more, worseFs52 Hz −12%, better
Qts0.43 −10%, better
Vas5.3 L –
BL4.1 T·m −11%, worse
Xmax4 mm −20%, worse
Sensitivity84.2 dB −0.8
Tang BandW4-1720
£82.23 · 274% more, worseFs60 Hz –
Qts0.42 −13%, better
Vas5.9 L +12%, worse
BL3.8 T·m −17%, worse
Xmax5 mm –
Sensitivity86 dB +1
VisatonHX 10
£99.54 · 353% more, worseFs80 Hz +36%, worse
Qts0.50 +4%
Vas5.1 L −4%
BL3.9 T·m −15%, worse
Xmax1.5 mm −70%, worse
Sensitivity88.3 dB +3.3, better
WavecorWF120BD10
£125.32 · 470% more, worseFs50 Hz −15%, better
Qts0.47 –
Vas6.2 L +17%, worse
BL5.2 T·m +13%, better
Xmax4 mm −20%, worse
Sensitivity83.9 dB −1.1
£167.50 · 662% more, worse
Fs49 Hz −17%, better
Qts0.45 −6%
Vas12 L +126%, worse
BL4.6 T·m –
Xmax5 mm –
Sensitivity86 dB +1
Tang BandW4-1879
£209.43 · 852% more, worseFs55 Hz −7%
Qts0.43 −10%, better
Vas9.1 L +72%, worse
BL4.2 T·m −9%
Xmax5 mm –
Sensitivity86.8 dB +1.8
MorelTSCM 634
£502.60 · 2186% more, worseFs49 Hz −17%, better
Qts0.53 +10%, worse
Vas13.3 L +151%, worse
BL5.1 T·m +11%, better
Xmax5.3 mm +5%
Sensitivity86.5 dB +1.5
WavecorWF120BD09
No current priceFs54 Hz −8%
Qts0.50 +4%
Vas5.3 L –
BL5.2 T·m +13%, better
Xmax4 mm −20%, worse
Sensitivity83.9 dB −1.1
Dayton AudioCFC120-4
No current priceFs57 Hz −3%
Qts0.45 −6%
Vas4.5 L −16%, better
BL4.2 T·m −8%
Xmax2.5 mm −50%, worse
Sensitivity83.9 dB −1.1
WavecorSW084OM02
No current priceFs77 Hz +31%, worse
Qts0.53 +10%, worse
Vas1.7 L −68%, better
BL4.6 T·m –
Xmax4.5 mm −10%, worse
Sensitivity83.4 dB −1.6
CIARECM132
No current priceFs115 Hz +95%, worse
Qts0.43 −10%, better
Vas3.8 L −28%, better
BL4.4 T·m −4%
Xmax1.6 mm −68%, worse
Sensitivity92.2 dB +7.2, better
Tang BandW5-1685
No current priceFs50 Hz −15%, better
Qts0.46 −4%
Vas12.8 L +141%, worse
BL4.7 T·m –
Xmax6 mm +20%, better
Sensitivity86.8 dB +1.8
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
- SoundImports4.8 out of 55 ratings · Checked 23 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 |
|---|---|---|---|---|
Willys-Hifi | £26.02, the lowest price | Stock not listed | Visit shop at Willys-Hifi | |
Lean Audio | £19.19 | Out of stock | Visit shop at Lean Audio | |
RumoH Import VAT and duty may apply | £21.99 | Stock not listed | Visit shop at RumoH | |
SoundImports Import VAT and duty may apply | £23.00 | Back order | Visit shop at SoundImports |
Best price over time
Tracked since 1 Apr
Recent changes
- 22 OctWillys-Hifi£21.92 → £26.02Up 19% from £21.92
- 1 OctWillys-Hifi£22.95 → £21.92Down 4.5% from £22.95
- 4 AugWillys-Hifi£21.95 → £22.95Up 4.6% from £21.95