5-inch LF driver · SB15 series · 31 mm voice coil · 40 W

SB Acoustics SB15BAC30-8-COAX 8Ω

Name: SB Acoustics SB15BAC30-8-COAX 8 Ohm
Brand: SB Acoustics
SKU: SB15BAC30-8-COAX

8 Ω

No price for delivery to the UK

All 2 offers

Open in 00 Simulator

Fs: 43Hz
Xmax: 3mm
SPL: 88dB
Pe: 40W
BL: 5.3T·m
Vd: 24cm³
Qts: 0.36
Vas: 18L

See all 21 specs

Published graphs

SB Acoustics SB15BAC30-8-COAX manufacturer graph 1

Specifications

Published by SB Acoustics

Manufacturer page

Datasheet PDF

SB Acoustics SB15BAC30-8-COAX is a 5-inch 8 ohm LF driver rated at 40 W RMS. The validated T/S data includes Fs 43 Hz, Qts 0.36, Vas 17.5 L, Xmax 3 mm, sensitivity 87.6 dB, plus 24 cm³ Vd and 110 EBP. bits tracks vendor pricing, datasheet links, simulator import data, and similar drivers from the same loudspeaker database.

The published T/S values agree with each other

Thiele/Small

Fs: 43Hz
Qts: 0.36
Qes: 0.39
Qms: 4.8
Vas: 17.5L
Re: 5.7Ω
Le: 0.13mH

Motor and cone

BL: 5.3T·m
Sd: 80cm²
Mms: 7g
Xmax: 3mm
Vd †: 24cm³
Voice coil: 31mm
Flux density: 0.96T

Power and response

Sensitivity †: 87.6dB
Manufacturer sensitivity: 86dB
Power: 40W
Impedance: 8Ω
EBP †: 110 · Leans vented

Size and mounting

Weight: 1.6kg

Other published values

Cms: 1.93mm/N

Sensitivity shows 87.6 dB, calculated from the T/S values. SB Acoustics publishes 86.0 dB, 1.6 dB apart.

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 · 5″

BL: 5.3T·m
Fs: 43Hz
Le: 0.13mH
Re: 5.7Ω
Sd: 80cm²
Cms: 1.93mm/N
Mms: 7g
Qes: 0.39
Qms: 4.8
Qts: 0.36
SPL: 87.6dB
Vas: 17.5L
Xmax: 3mm
Power: 40W
Impedance: 8Ω
Flux density: 0.96T
Sensitivity: 86dB
Calculated sensitivity †: 87.6dB
Manufacturer sensitivity: 86dB
Voice coil: 31mm
Weight: 1.6kg

Compare

Same-size drivers, compared with the SB15BAC30-8-COAX. Clear differences are green when better and red when worse.

This driverSB15BAC30-8-COAX

Best price

–

43 Hz

Qts

0.36

Vas

17.5 L

5.3 T·m

Xmax

3 mm

Sensitivity

87.6 dB

Power

40 W

Dayton AudioDC130B-4

£22.68

Fs52 Hz +20%

Qts0.35 –

Vas12.3 L −30%

BL4.9 T·m −8%

Xmax2.5 mm −17%

Sensitivity88.2 dB +0.6

Dayton AudioDC130BS-4

£22.68

Fs52 Hz +20%

Qts0.35 –

Vas13.2 L −25%

BL4.8 T·m −9%

Xmax2.5 mm −17%

Sensitivity88.2 dB +0.6

Dayton AudioRS150-8

£45.37

Fs48 Hz +11%

Qts0.34 −6%

Vas16.6 L −5%

BL5.6 T·m +5%

Xmax4 mm +33%

Sensitivity88.3 dB +0.7

SB AcousticsSB15MFC30-8

£48.66

Fs39 Hz −9%

Qts0.37 –

Vas17.7 L –

BL5.6 T·m +6%

Xmax10 mm +233%

Sensitivity86.2 dB −1.4

SB AcousticsSB15NRX2C30-8

£49.12

Fs37 Hz −15%

Qts0.34 −6%

Vas20 L +14%

BL5.8 T·m +8%

Xmax10 mm +233%

Sensitivity86.2 dB −1.4

WavecorWF146WA05

£53.71

Fs41 Hz −5%

Qts0.38 +6%

Vas15.2 L −13%

BL5 T·m −6%

Xmax3 mm –

Sensitivity86.2 dB −1.4

WavecorWF146WA06

£53.71

Fs40 Hz −7%

Qts0.36 –

Vas16.6 L −5%

BL6.3 T·m +19%

Xmax3 mm –

Sensitivity86.5 dB −1.1

Scanspeak12W/8524G00

£54.93

Fs52 Hz +21%

Qts0.32 −11%

Vas8.2 L −53%

BL5.4 T·m –

Xmax3 mm –

Sensitivity87.2 dB –

WavecorWF146WA01

£58.25

Fs56 Hz +30%

Qts0.42 +17%

Vas10 L −43%

BL5.1 T·m −4%

Xmax3 mm –

Sensitivity87.9 dB –

Tang BandW4-1320SIF

£58.48

Fs75 Hz +74%

Qts0.36 –

Vas5.2 L −70%

BL5.3 T·m –

Xmax3 mm –

Sensitivity89.2 dB +1.6

Dayton AudioRS150P-8A

£58.74

Fs47 Hz +10%

Qts0.34 −6%

Vas16.7 L −5%

BL5.6 T·m +6%

Xmax4 mm +33%

Sensitivity88.1 dB +0.5

SB AcousticsSB15NBAC30-8

£62.57

Fs36 Hz −17%

Qts0.37 –

Vas17 L –

BL5.7 T·m +8%

Xmax10 mm +233%

Sensitivity84.7 dB −2.9

SB AcousticsSB15NAC30-8

£70.31

Fs36 Hz −17%

Qts0.37 –

Vas17.7 L –

BL5.9 T·m +11%

Xmax5 mm +67%

Sensitivity85.1 dB −2.5

Tang BandW4-1337SDF

£72.05

Fs70 Hz +63%

Qts0.34 −6%

Vas5.6 L −68%

BL5.3 T·m –

Xmax2.5 mm −17%

Sensitivity88.9 dB +1.3

SB AcousticsSB15CAC30-8

£76.56

Fs36 Hz −17%

Qts0.38 +6%

Vas17.9 L –

BL5.7 T·m +8%

Xmax10 mm +233%

Sensitivity84.8 dB −2.8

WavecorWF118WA01

£77.39

Fs64 Hz +49%

Qts0.36 –

Vas4.3 L −75%

BL4.6 T·m −13%

Xmax3 mm –

Sensitivity86.8 dB −0.8

SEASH1216-08 CA15RLY

£90.51

Fs44 Hz –

Qts0.34 −6%

Vas14 L −20%

BL5.5 T·m +4%

Xmax5 mm +67%

Sensitivity86.6 dB −1

Tang BandW5-2143

£114.43

Fs55 Hz +28%

Qts0.38 +6%

Vas19 L +9%

BL5.4 T·m –

Xmax2.5 mm −17%

Sensitivity90.7 dB +3.1

Scanspeak15M/8631G00

£169.48

Fs42 Hz –

Qts0.35 –

Vas16.2 L −7%

BL6.8 T·m +28%

Xmax3 mm –

Sensitivity87.1 dB −0.5

SEASE0044-08S W12CY003

£203.38

Fs60 Hz +40%

Qts0.36 –

Vas4 L −77%

BL5.5 T·m +4%

Xmax3 mm –

Sensitivity85 dB −2.6

Scanspeak12M/4631G00

£245.76

Fs75 Hz +74%

Qts0.33 −8%

Vas2.3 L −87%

BL5.3 T·m –

Xmax3 mm –

Sensitivity86.5 dB −1.1

SEASE0015-08S W15CY001

£296.62

Fs38 Hz −12%

Qts0.36 –

Vas14 L −20%

BL5.5 T·m +4%

Xmax4 mm +33%

Sensitivity84.5 dB −3.1

SEASE0021-08S W12CY001

£339.00

Fs45 Hz +5%

Qts0.36 –

Vas6 L −66%

BL5.4 T·m –

Xmax3 mm –

Sensitivity83.2 dB −4.4

SEASE0070-08 W12CY004

£381.38

Fs48 Hz +12%

Qts0.38 +6%

Vas4.6 L −74%

BL5.9 T·m +11%

Xmax3 mm –

Sensitivity83 dB −4.6

Audio Technology4 H 52 06 13 SD

No current price

Fs48 Hz +12%

Qts0.33 −8%

Vas16 L −9%

BL6.1 T·m +15%

Xmax3.5 mm +17%

Sensitivity88.4 dB +0.8

SEASE0049-04S W16NX001

No current price

Fs37 Hz −14%

Qts0.33 −8%

Vas15 L −14%

BL5.3 T·m –

Xmax7 mm +133%

Sensitivity85 dB −2.6

Tang BandW4-1320SJF

No current price

Fs75 Hz +74%

Qts0.38 +6%

Vas5.2 L −70%

BL5.1 T·m −3%

Xmax3 mm –

Sensitivity88.9 dB +1.3

Tang BandW4-1337SD

No current price

Fs70 Hz +63%

Qts0.37 –

Vas4.9 L −72%

BL5.4 T·m –

Xmax3 mm –

Sensitivity87.3 dB –

Tang BandW5-1611SDF

No current price

Fs60 Hz +40%

Qts0.41 +14%

Vas15.2 L −13%

BL4.3 T·m −19%

Xmax3 mm –

Sensitivity90.5 dB +2.9

SB AcousticsSB17BAC35-8-COAX

No current price

Fs35 Hz −18%

Qts0.33 −8%

Vas33.1 L +89%

BL5.7 T·m +8%

Xmax3.1 mm +3%

Sensitivity88.1 dB +0.5

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
Lean Audio Checked 12 Oct 2026 · 8 Ω · Source: inc VAT · 20%	£109.20		Back order	Visit shop at Lean Audio
SoundImports Checked 12 Oct 2026 · Ships from Netherlands · 8 Ω · Source: inc VAT Import VAT and duty may apply	£118.62		Back order	Visit shop at SoundImports

bits00 AUDIO

5-inch LF driver · SB15 series · 31 mm voice coil · 40 W

SB Acoustics SB15BAC30-8-COAX 8Ω

8 Ω

No price for delivery to the UK

All 2 offers

Open in 00 Simulator

Fs: 43Hz
Xmax: 3mm
SPL: 88dB
Pe: 40W
BL: 5.3T·m
Vd: 24cm³
Qts: 0.36
Vas: 18L

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: 43Hz
Qts: 0.36
Qes: 0.39
Qms: 4.8
Vas: 17.5L
Re: 5.7Ω
Le: 0.13mH

Motor and cone

BL: 5.3T·m
Sd: 80cm²
Mms: 7g
Xmax: 3mm
Vd †: 24cm³
Voice coil: 31mm
Flux density: 0.96T

Power and response

Sensitivity †: 87.6dB
Manufacturer sensitivity: 86dB
Power: 40W
Impedance: 8Ω
EBP †: 110 · Leans vented

Size and mounting

Weight: 1.6kg

Other published values

Cms: 1.93mm/N

Sensitivity shows 87.6 dB, calculated from the T/S values. SB Acoustics publishes 86.0 dB, 1.6 dB apart.

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 · 5″

BL: 5.3T·m
Fs: 43Hz
Le: 0.13mH
Re: 5.7Ω
Sd: 80cm²
Cms: 1.93mm/N
Mms: 7g
Qes: 0.39
Qms: 4.8
Qts: 0.36
SPL: 87.6dB
Vas: 17.5L
Xmax: 3mm
Power: 40W
Impedance: 8Ω
Flux density: 0.96T
Sensitivity: 86dB
Calculated sensitivity †: 87.6dB
Manufacturer sensitivity: 86dB
Voice coil: 31mm
Weight: 1.6kg

Compare

Same-size drivers, compared with the SB15BAC30-8-COAX. Clear differences are green when better and red when worse.

This driverSB15BAC30-8-COAX

Best price

–

43 Hz

Qts

0.36

Vas

17.5 L

5.3 T·m

Xmax

3 mm

Sensitivity

87.6 dB

Power

40 W

Dayton AudioDC130B-4

£22.68

Fs52 Hz +20%

Qts0.35 –

Vas12.3 L −30%

BL4.9 T·m −8%

Xmax2.5 mm −17%

Sensitivity88.2 dB +0.6

Dayton AudioDC130BS-4

£22.68

Fs52 Hz +20%

Qts0.35 –

Vas13.2 L −25%

BL4.8 T·m −9%

Xmax2.5 mm −17%

Sensitivity88.2 dB +0.6

Dayton AudioRS150-8

£45.37

Fs48 Hz +11%

Qts0.34 −6%

Vas16.6 L −5%

BL5.6 T·m +5%

Xmax4 mm +33%

Sensitivity88.3 dB +0.7

SB AcousticsSB15MFC30-8

£48.66

Fs39 Hz −9%

Qts0.37 –

Vas17.7 L –

BL5.6 T·m +6%

Xmax10 mm +233%

Sensitivity86.2 dB −1.4

SB AcousticsSB15NRX2C30-8

£49.12

Fs37 Hz −15%

Qts0.34 −6%

Vas20 L +14%

BL5.8 T·m +8%

Xmax10 mm +233%

Sensitivity86.2 dB −1.4

WavecorWF146WA05

£53.71

Fs41 Hz −5%

Qts0.38 +6%

Vas15.2 L −13%

BL5 T·m −6%

Xmax3 mm –

Sensitivity86.2 dB −1.4

WavecorWF146WA06

£53.71

Fs40 Hz −7%

Qts0.36 –

Vas16.6 L −5%

BL6.3 T·m +19%

Xmax3 mm –

Sensitivity86.5 dB −1.1

Scanspeak12W/8524G00

£54.93

Fs52 Hz +21%

Qts0.32 −11%

Vas8.2 L −53%

BL5.4 T·m –

Xmax3 mm –

Sensitivity87.2 dB –

WavecorWF146WA01

£58.25

Fs56 Hz +30%

Qts0.42 +17%

Vas10 L −43%

BL5.1 T·m −4%

Xmax3 mm –

Sensitivity87.9 dB –

Tang BandW4-1320SIF

£58.48

Fs75 Hz +74%

Qts0.36 –

Vas5.2 L −70%

BL5.3 T·m –

Xmax3 mm –

Sensitivity89.2 dB +1.6

Dayton AudioRS150P-8A

£58.74

Fs47 Hz +10%

Qts0.34 −6%

Vas16.7 L −5%

BL5.6 T·m +6%

Xmax4 mm +33%

Sensitivity88.1 dB +0.5

SB AcousticsSB15NBAC30-8

£62.57

Fs36 Hz −17%

Qts0.37 –

Vas17 L –

BL5.7 T·m +8%

Xmax10 mm +233%

Sensitivity84.7 dB −2.9

SB AcousticsSB15NAC30-8

£70.31

Fs36 Hz −17%

Qts0.37 –

Vas17.7 L –

BL5.9 T·m +11%

Xmax5 mm +67%

Sensitivity85.1 dB −2.5

Tang BandW4-1337SDF

£72.05

Fs70 Hz +63%

Qts0.34 −6%

Vas5.6 L −68%

BL5.3 T·m –

Xmax2.5 mm −17%

Sensitivity88.9 dB +1.3

SB AcousticsSB15CAC30-8

£76.56

Fs36 Hz −17%

Qts0.38 +6%

Vas17.9 L –

BL5.7 T·m +8%

Xmax10 mm +233%

Sensitivity84.8 dB −2.8

WavecorWF118WA01

£77.39

Fs64 Hz +49%

Qts0.36 –

Vas4.3 L −75%

BL4.6 T·m −13%

Xmax3 mm –

Sensitivity86.8 dB −0.8

SEASH1216-08 CA15RLY

£90.51

Fs44 Hz –

Qts0.34 −6%

Vas14 L −20%

BL5.5 T·m +4%

Xmax5 mm +67%

Sensitivity86.6 dB −1

Tang BandW5-2143

£114.43

Fs55 Hz +28%

Qts0.38 +6%

Vas19 L +9%

BL5.4 T·m –

Xmax2.5 mm −17%

Sensitivity90.7 dB +3.1

Scanspeak15M/8631G00

£169.48

Fs42 Hz –

Qts0.35 –

Vas16.2 L −7%

BL6.8 T·m +28%

Xmax3 mm –

Sensitivity87.1 dB −0.5

SEASE0044-08S W12CY003

£203.38

Fs60 Hz +40%

Qts0.36 –

Vas4 L −77%

BL5.5 T·m +4%

Xmax3 mm –

Sensitivity85 dB −2.6

Scanspeak12M/4631G00

£245.76

Fs75 Hz +74%

Qts0.33 −8%

Vas2.3 L −87%

BL5.3 T·m –

Xmax3 mm –

Sensitivity86.5 dB −1.1

SEASE0015-08S W15CY001

£296.62

Fs38 Hz −12%

Qts0.36 –

Vas14 L −20%

BL5.5 T·m +4%

Xmax4 mm +33%

Sensitivity84.5 dB −3.1

SEASE0021-08S W12CY001

£339.00

Fs45 Hz +5%

Qts0.36 –

Vas6 L −66%

BL5.4 T·m –

Xmax3 mm –

Sensitivity83.2 dB −4.4

SEASE0070-08 W12CY004

£381.38

Fs48 Hz +12%

Qts0.38 +6%

Vas4.6 L −74%

BL5.9 T·m +11%

Xmax3 mm –

Sensitivity83 dB −4.6

Audio Technology4 H 52 06 13 SD

No current price

Fs48 Hz +12%

Qts0.33 −8%

Vas16 L −9%

BL6.1 T·m +15%

Xmax3.5 mm +17%

Sensitivity88.4 dB +0.8

SEASE0049-04S W16NX001

No current price

Fs37 Hz −14%

Qts0.33 −8%

Vas15 L −14%

BL5.3 T·m –

Xmax7 mm +133%

Sensitivity85 dB −2.6

Tang BandW4-1320SJF

No current price

Fs75 Hz +74%

Qts0.38 +6%

Vas5.2 L −70%

BL5.1 T·m −3%

Xmax3 mm –

Sensitivity88.9 dB +1.3

Tang BandW4-1337SD

No current price

Fs70 Hz +63%

Qts0.37 –

Vas4.9 L −72%

BL5.4 T·m –

Xmax3 mm –

Sensitivity87.3 dB –

Tang BandW5-1611SDF

No current price

Fs60 Hz +40%

Qts0.41 +14%

Vas15.2 L −13%

BL4.3 T·m −19%

Xmax3 mm –

Sensitivity90.5 dB +2.9

SB AcousticsSB17BAC35-8-COAX

No current price

Fs35 Hz −18%

Qts0.33 −8%

Vas33.1 L +89%

BL5.7 T·m +8%

Xmax3.1 mm +3%

Sensitivity88.1 dB +0.5

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
Lean Audio Checked 12 Oct 2026 · 8 Ω · Source: inc VAT · 20%	£109.20		Back order	Visit shop at Lean Audio
SoundImports Checked 12 Oct 2026 · Ships from Netherlands · 8 Ω · Source: inc VAT Import VAT and duty may apply	£118.62		Back order	Visit shop at SoundImports