4-inch LF driver · SB12 series · 25 mm voice coil · 30 W

SB Acoustics SB12PFC25-4-COAX 4Ω

Name: SB Acoustics SB12PFC25-4-COAX 4 Ohm
Brand: SB Acoustics
SKU: SB12PFC25-4-COAX
Availability: InStock

4 Ω

£48.27

Steady

SoundImports · 3 in stock · Ships from Netherlands · All 1 offer

Open in 00 Simulator

Fs: 58Hz
Xmax: 5mm
SPL: 86dB
Pe: 30W
BL: 3.8T·m
Vd: 23cm³
Qts: 0.33
Vas: 5L

See all 21 specs

Published graphs

SB Acoustics SB12PFC25-4-COAX manufacturer graph 1

Specifications

Published by SB Acoustics

Manufacturer page

Datasheet PDF

SB Acoustics SB12PFC25-4-COAX is a 4-inch 4 ohm LF driver rated at 30 W RMS. The validated T/S data includes Fs 58 Hz, Qts 0.33, Vas 4.8 L, Xmax 5 mm, sensitivity 86.2 dB, plus 23 cm³ Vd and 161 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 £48.27.

The published T/S values agree with each other

Thiele/Small

Fs: 58Hz
Qts: 0.33
Qes: 0.36
Qms: 4.1
Vas: 4.8L
Re: 3.1Ω
Le: 0.26mH

Motor and cone

BL: 3.8T·m
Sd: 45cm²
Mms: 5g
Xmax: 5mm
Vd †: 23cm³
Voice coil: 25mm
Flux density: 1T

Power and response

Sensitivity †: 86.2dB
Manufacturer sensitivity: 87dB
Power: 30W
Impedance: 4Ω
EBP †: 161 · Leans vented

Size and mounting

Weight: 0.9kg

Other published values

Cms: 1.66mm/N

Excursion and motor values come from the LF section; the frequency range spans every section.

† Calculated by bits from the published values

What this validation status means

Components and manufacturer details

LF · Primary · 4″

BL: 3.8T·m
Fs: 58Hz
Le: 0.26mH
Re: 3.1Ω
Sd: 45cm²
Cms: 1.66mm/N
Mms: 5g
Qes: 0.36
Qms: 4.1
Qts: 0.33
SPL: 86.2dB
Vas: 4.8L
Xmax: 5mm
Power: 30W
Impedance: 4Ω
Flux density: 1T
Sensitivity: 87dB
Calculated sensitivity †: 86.2dB
Manufacturer sensitivity: 87dB
Voice coil: 25mm
Weight: 0.9kg

Compare

Same-size drivers, compared with the SB12PFC25-4-COAX. Clear differences are green when better and red when worse.

This driverSB12PFC25-4-COAX

Best price

£48.27

58 Hz

Qts

0.33

Vas

4.8 L

3.8 T·m

Xmax

5 mm

Sensitivity

86.2 dB

Power

30 W

FaitalPRO5FE100

£21.36 · 56% less

Fs65 Hz +12%

Qts0.33 –

Vas6.1 L +27%

BL6 T·m +58%

Xmax5.2 mm +4%

Sensitivity88.8 dB +2.6

SB AcousticsSB12PFC25-4

£22.25 · 54% less

Fs58 Hz –

Qts0.43 +30%

Vas5.2 L +8%

BL3.5 T·m −8%

Xmax5 mm –

Sensitivity85.2 dB −1

SB AcousticsSB12PAC25-4

£23.67 · 51% less

Fs53 Hz −9%

Qts0.31 −6%

Vas5.3 L +10%

BL4.3 T·m +14%

Xmax10 mm +100%

Sensitivity85.7 dB −0.5

SB AcousticsSB12PACR25-4

£23.67 · 51% less

Fs53 Hz −9%

Qts0.31 −6%

Vas5.3 L +10%

BL4.3 T·m +14%

Xmax10 mm +100%

Sensitivity85.7 dB −0.5

FaitalPRO5FE120

£24.31 · 50% less

Fs65 Hz +12%

Qts0.38 +15%

Vas5 L +4%

BL5.9 T·m +55%

Xmax5.2 mm +4%

Sensitivity87.4 dB +1.2

CIAREHW100

£27.97 · 42% less

Fs70 Hz +21%

Qts0.31 −6%

Vas4.3 L −10%

BL5.6 T·m +47%

Xmax4.3 mm −14%

Sensitivity88 dB +1.8

Dayton AudioRS125-4

£37.81 · 22% less

Fs57 Hz –

Qts0.37 +12%

Vas5.3 L +10%

BL3.6 T·m −4%

Xmax4 mm −20%

Sensitivity85.5 dB −0.7

Dayton AudioRS125-8

£37.81 · 22% less

Fs59 Hz –

Qts0.34 +3%

Vas4.8 L –

BL5.7 T·m +50%

Xmax4 mm −20%

Sensitivity85.8 dB –

SB AcousticsSB12PFCR25-4-COAX

£41.40 · 14% less

Fs58 Hz –

Qts0.33 –

Vas4.8 L –

BL3.8 T·m –

Xmax5 mm –

Sensitivity86.2 dB –

SB AcousticsSB12NRXF25-4

£45.28 · 6% less

Fs61 Hz +5%

Qts0.48 +45%

Vas4.1 L −15%

BL3.6 T·m −5%

Xmax5 mm –

Sensitivity84.5 dB −1.7

SB AcousticsSB12MNRX2-25-4

£47.06 · 3% less

Fs64 Hz +9%

Qts0.32 −3%

Vas5.3 L +10%

BL3.9 T·m –

Xmax4.4 mm −12%

Sensitivity87.9 dB +1.7

WavecorWF118WA07

£47.66 · 1% less

Fs56 Hz −3%

Qts0.36 +9%

Vas4.9 L –

BL4.5 T·m +18%

Xmax4 mm −20%

Sensitivity85.6 dB −0.6

SB AcousticsSB12MNRX25-4

£52.93 · 10% more

Fs58 Hz –

Qts0.37 +12%

Vas5.5 L +15%

BL3.7 T·m –

Xmax2.3 mm −55%

Sensitivity86.1 dB –

SB AcousticsSB12PACR25-4-COAX

£53.19 · 10% more

Fs55 Hz −5%

Qts0.35 +6%

Vas4.3 L −10%

BL4 T·m +5%

Xmax5 mm –

Sensitivity84.8 dB −1.4

SB AcousticsSB15NRXC30-8

£54.80 · 14% more

Fs38 Hz −34%

Qts0.33 –

Vas20.7 L +331%

BL5.6 T·m +47%

Xmax5 mm –

Sensitivity87.1 dB +0.9

SB AcousticsSB12CACS25-4

£58.31 · 21% more

Fs51 Hz −12%

Qts0.31 −6%

Vas5.7 L +19%

BL4.3 T·m +13%

Xmax10 mm +100%

Sensitivity85.6 dB −0.6

Beyma5P200FE

£63.23 · 31% more

Fs72 Hz +24%

Qts0.33 –

Vas5.7 L +19%

BL8.5 T·m +124%

Xmax5.7 mm +14%

Sensitivity89.9 dB +3.7

FaitalPRO5PR160

£66.11 · 37% more

Fs90 Hz +55%

Qts0.31 −6%

Vas3.7 L −23%

BL9.6 T·m +153%

Xmax5.1 mm –

Sensitivity91.2 dB +5

SB AcousticsSB15NAC30-4

£70.31 · 46% more

Fs35 Hz −40%

Qts0.30 −9%

Vas18.3 L +281%

BL4.8 T·m +26%

Xmax5 mm –

Sensitivity85.9 dB –

WavecorWF118WA01

£77.39 · 60% more

Fs64 Hz +10%

Qts0.36 +9%

Vas4.3 L −10%

BL4.6 T·m +21%

Xmax3 mm −40%

Sensitivity86.8 dB +0.6

SEASH1152-08 CA12RCY

£80.44 · 67% more

Fs57 Hz –

Qts0.31 −6%

Vas5 L +4%

BL6.3 T·m +67%

Xmax3 mm −40%

Sensitivity86.1 dB –

SEASH1455-08 ER15RLY

£81.26 · 68% more

Fs44 Hz −24%

Qts0.32 −3%

Vas15 L +213%

BL5.5 T·m +45%

Xmax5 mm –

Sensitivity87 dB +0.8

Tang BandW4-1720

£83.20 · 72% more

Fs60 Hz +3%

Qts0.42 +27%

Vas5.9 L +23%

BL3.8 T·m –

Xmax5 mm –

Sensitivity86 dB –

Tang BandW3-1878

£127.14 · 163% more

Fs75 Hz +29%

Qts0.28 −15%

Vas3.1 L −36%

BL4.3 T·m +13%

Xmax4 mm −20%

Sensitivity87.9 dB +1.7

Tang BandW5-1880

£211.90 · 339% more

Fs48 Hz −17%

Qts0.32 −3%

Vas26.5 L +451%

BL5.5 T·m +44%

Xmax5 mm –

Sensitivity90.9 dB +4.7

PurifiPTT4.0M08-NAC-03

£254.24 · 427% more

Fs50 Hz −14%

Qts0.32 −3%

Vas4.9 L –

BL7 T·m +84%

Xmax2.9 mm −42%

Sensitivity84.6 dB −1.6

CIAREHWL100

No current price

Fs70 Hz +21%

Qts0.31 −6%

Vas4.3 L −10%

BL5.6 T·m +47%

Xmax4.3 mm −14%

Sensitivity88 dB +1.8

WavecorWF120BD04

No current price

Fs62 Hz +6%

Qts0.37 +12%

Vas4.3 L −11%

BL4.5 T·m +18%

Xmax4 mm −20%

Sensitivity86 dB –

Tang BandW3-2052S

No current price

Fs50 Hz −14%

Qts0.34 +3%

Vas0.9 L −81%

BL6.8 T·m +78%

Xmax5 mm –

Sensitivity76.7 dB −9.5

Tang BandW4-937SF

No current price

Fs65 Hz +12%

Qts0.26 −21%

Vas4.9 L –

BL6.7 T·m +76%

Xmax4.5 mm −10%

Sensitivity88.1 dB +1.9

Search similar

Tune the match

Choose the published values that matter to your design. Size stays matched to this driver.

Qts

Qes

Vas

Xmax

Where to buy

Prices for delivery to the UK, including VAT. How prices work

Watch price

Shop	Price	Against the lowest	Stock	Link
SoundImports Checked 12 Oct 2026 · Ships from Netherlands · 4 Ω · Source: inc VAT Import VAT and duty may apply	£48.27, the lowest price		3 in stock	Visit shop at SoundImports

Best price over time

Tracked since 1 Apr

bits00 AUDIO

4-inch LF driver · SB12 series · 25 mm voice coil · 30 W

SB Acoustics SB12PFC25-4-COAX 4Ω

4 Ω

£48.27

Steady

SoundImports · 3 in stock · Ships from Netherlands · All 1 offer

Open in 00 Simulator

Fs: 58Hz
Xmax: 5mm
SPL: 86dB
Pe: 30W
BL: 3.8T·m
Vd: 23cm³
Qts: 0.33
Vas: 5L

See all 21 specs

Published graphs

Specifications

Published by SB Acoustics

Manufacturer page

Datasheet PDF

The published T/S values agree with each other

Thiele/Small

Fs: 58Hz
Qts: 0.33
Qes: 0.36
Qms: 4.1
Vas: 4.8L
Re: 3.1Ω
Le: 0.26mH

Motor and cone

BL: 3.8T·m
Sd: 45cm²
Mms: 5g
Xmax: 5mm
Vd †: 23cm³
Voice coil: 25mm
Flux density: 1T

Power and response

Sensitivity †: 86.2dB
Manufacturer sensitivity: 87dB
Power: 30W
Impedance: 4Ω
EBP †: 161 · Leans vented

Size and mounting

Weight: 0.9kg

Other published values

Cms: 1.66mm/N

Excursion and motor values come from the LF section; the frequency range spans every section.

† Calculated by bits from the published values

What this validation status means

Components and manufacturer details

LF · Primary · 4″

BL: 3.8T·m
Fs: 58Hz
Le: 0.26mH
Re: 3.1Ω
Sd: 45cm²
Cms: 1.66mm/N
Mms: 5g
Qes: 0.36
Qms: 4.1
Qts: 0.33
SPL: 86.2dB
Vas: 4.8L
Xmax: 5mm
Power: 30W
Impedance: 4Ω
Flux density: 1T
Sensitivity: 87dB
Calculated sensitivity †: 86.2dB
Manufacturer sensitivity: 87dB
Voice coil: 25mm
Weight: 0.9kg

Compare

Same-size drivers, compared with the SB12PFC25-4-COAX. Clear differences are green when better and red when worse.

This driverSB12PFC25-4-COAX

Best price

£48.27

58 Hz

Qts

0.33

Vas

4.8 L

3.8 T·m

Xmax

5 mm

Sensitivity

86.2 dB

Power

30 W

FaitalPRO5FE100

£21.36 · 56% less

Fs65 Hz +12%

Qts0.33 –

Vas6.1 L +27%

BL6 T·m +58%

Xmax5.2 mm +4%

Sensitivity88.8 dB +2.6

SB AcousticsSB12PFC25-4

£22.25 · 54% less

Fs58 Hz –

Qts0.43 +30%

Vas5.2 L +8%

BL3.5 T·m −8%

Xmax5 mm –

Sensitivity85.2 dB −1

SB AcousticsSB12PAC25-4

£23.67 · 51% less

Fs53 Hz −9%

Qts0.31 −6%

Vas5.3 L +10%

BL4.3 T·m +14%

Xmax10 mm +100%

Sensitivity85.7 dB −0.5

SB AcousticsSB12PACR25-4

£23.67 · 51% less

Fs53 Hz −9%

Qts0.31 −6%

Vas5.3 L +10%

BL4.3 T·m +14%

Xmax10 mm +100%

Sensitivity85.7 dB −0.5

FaitalPRO5FE120

£24.31 · 50% less

Fs65 Hz +12%

Qts0.38 +15%

Vas5 L +4%

BL5.9 T·m +55%

Xmax5.2 mm +4%

Sensitivity87.4 dB +1.2

CIAREHW100

£27.97 · 42% less

Fs70 Hz +21%

Qts0.31 −6%

Vas4.3 L −10%

BL5.6 T·m +47%

Xmax4.3 mm −14%

Sensitivity88 dB +1.8

Dayton AudioRS125-4

£37.81 · 22% less

Fs57 Hz –

Qts0.37 +12%

Vas5.3 L +10%

BL3.6 T·m −4%

Xmax4 mm −20%

Sensitivity85.5 dB −0.7

Dayton AudioRS125-8

£37.81 · 22% less

Fs59 Hz –

Qts0.34 +3%

Vas4.8 L –

BL5.7 T·m +50%

Xmax4 mm −20%

Sensitivity85.8 dB –

SB AcousticsSB12PFCR25-4-COAX

£41.40 · 14% less

Fs58 Hz –

Qts0.33 –

Vas4.8 L –

BL3.8 T·m –

Xmax5 mm –

Sensitivity86.2 dB –

SB AcousticsSB12NRXF25-4

£45.28 · 6% less

Fs61 Hz +5%

Qts0.48 +45%

Vas4.1 L −15%

BL3.6 T·m −5%

Xmax5 mm –

Sensitivity84.5 dB −1.7

SB AcousticsSB12MNRX2-25-4

£47.06 · 3% less

Fs64 Hz +9%

Qts0.32 −3%

Vas5.3 L +10%

BL3.9 T·m –

Xmax4.4 mm −12%

Sensitivity87.9 dB +1.7

WavecorWF118WA07

£47.66 · 1% less

Fs56 Hz −3%

Qts0.36 +9%

Vas4.9 L –

BL4.5 T·m +18%

Xmax4 mm −20%

Sensitivity85.6 dB −0.6

SB AcousticsSB12MNRX25-4

£52.93 · 10% more

Fs58 Hz –

Qts0.37 +12%

Vas5.5 L +15%

BL3.7 T·m –

Xmax2.3 mm −55%

Sensitivity86.1 dB –

SB AcousticsSB12PACR25-4-COAX

£53.19 · 10% more

Fs55 Hz −5%

Qts0.35 +6%

Vas4.3 L −10%

BL4 T·m +5%

Xmax5 mm –

Sensitivity84.8 dB −1.4

SB AcousticsSB15NRXC30-8

£54.80 · 14% more

Fs38 Hz −34%

Qts0.33 –

Vas20.7 L +331%

BL5.6 T·m +47%

Xmax5 mm –

Sensitivity87.1 dB +0.9

SB AcousticsSB12CACS25-4

£58.31 · 21% more

Fs51 Hz −12%

Qts0.31 −6%

Vas5.7 L +19%

BL4.3 T·m +13%

Xmax10 mm +100%

Sensitivity85.6 dB −0.6

Beyma5P200FE

£63.23 · 31% more

Fs72 Hz +24%

Qts0.33 –

Vas5.7 L +19%

BL8.5 T·m +124%

Xmax5.7 mm +14%

Sensitivity89.9 dB +3.7

FaitalPRO5PR160

£66.11 · 37% more

Fs90 Hz +55%

Qts0.31 −6%

Vas3.7 L −23%

BL9.6 T·m +153%

Xmax5.1 mm –

Sensitivity91.2 dB +5

SB AcousticsSB15NAC30-4

£70.31 · 46% more

Fs35 Hz −40%

Qts0.30 −9%

Vas18.3 L +281%

BL4.8 T·m +26%

Xmax5 mm –

Sensitivity85.9 dB –

WavecorWF118WA01

£77.39 · 60% more

Fs64 Hz +10%

Qts0.36 +9%

Vas4.3 L −10%

BL4.6 T·m +21%

Xmax3 mm −40%

Sensitivity86.8 dB +0.6

SEASH1152-08 CA12RCY

£80.44 · 67% more

Fs57 Hz –

Qts0.31 −6%

Vas5 L +4%

BL6.3 T·m +67%

Xmax3 mm −40%

Sensitivity86.1 dB –

SEASH1455-08 ER15RLY

£81.26 · 68% more

Fs44 Hz −24%

Qts0.32 −3%

Vas15 L +213%

BL5.5 T·m +45%

Xmax5 mm –

Sensitivity87 dB +0.8

Tang BandW4-1720

£83.20 · 72% more

Fs60 Hz +3%

Qts0.42 +27%

Vas5.9 L +23%

BL3.8 T·m –

Xmax5 mm –

Sensitivity86 dB –

Tang BandW3-1878

£127.14 · 163% more

Fs75 Hz +29%

Qts0.28 −15%

Vas3.1 L −36%

BL4.3 T·m +13%

Xmax4 mm −20%

Sensitivity87.9 dB +1.7

Tang BandW5-1880

£211.90 · 339% more

Fs48 Hz −17%

Qts0.32 −3%

Vas26.5 L +451%

BL5.5 T·m +44%

Xmax5 mm –

Sensitivity90.9 dB +4.7

PurifiPTT4.0M08-NAC-03

£254.24 · 427% more

Fs50 Hz −14%

Qts0.32 −3%

Vas4.9 L –

BL7 T·m +84%

Xmax2.9 mm −42%

Sensitivity84.6 dB −1.6

CIAREHWL100

No current price

Fs70 Hz +21%

Qts0.31 −6%

Vas4.3 L −10%

BL5.6 T·m +47%

Xmax4.3 mm −14%

Sensitivity88 dB +1.8

WavecorWF120BD04

No current price

Fs62 Hz +6%

Qts0.37 +12%

Vas4.3 L −11%

BL4.5 T·m +18%

Xmax4 mm −20%

Sensitivity86 dB –

Tang BandW3-2052S

No current price

Fs50 Hz −14%

Qts0.34 +3%

Vas0.9 L −81%

BL6.8 T·m +78%

Xmax5 mm –

Sensitivity76.7 dB −9.5

Tang BandW4-937SF

No current price

Fs65 Hz +12%

Qts0.26 −21%

Vas4.9 L –

BL6.7 T·m +76%

Xmax4.5 mm −10%

Sensitivity88.1 dB +1.9

Search similar

Tune the match

Choose the published values that matter to your design. Size stays matched to this driver.

Qts

Qes

Vas

Xmax

Where to buy

Prices for delivery to the UK, including VAT. How prices work

Watch price

Shop	Price	Against the lowest	Stock	Link
SoundImports Checked 12 Oct 2026 · Ships from Netherlands · 4 Ω · Source: inc VAT Import VAT and duty may apply	£48.27, the lowest price		3 in stock	Visit shop at SoundImports

Best price over time

Tracked since 1 Apr