5-inch LF driver · MW13 series · 31 mm voice coil · 40 W

SB Acoustics MW13TX-4 4Ω

Name: SB Acoustics MW13TX-4 4 Ohm
Brand: SB Acoustics
SKU: MW13TX-4
Availability: InStock

4 Ω

£233.59

Steady

4.6% below the average of 3 shops

Lean Audio · 2 in stock · All 6 offers

Open in 00 Simulator

Fs: 38Hz
Xmax: 5mm
SPL: 87dB
Pe: 40W
BL: 5T·m
Vd: 35cm³
Qts: 0.26
Vas: 16L

See all 21 specs

Curve provenanceInspect 3 traces

These plotted lines are Bits digitizations of manufacturer evidence, not new measurements. How provenance works

30 degrees
Frequency response
Trace datasheet-response-trace-poc/v1
240 plotted pointsMedium confidence1,580 selected pixels of 2,659
Manufacturer datasheet, page 1
60 degrees
Frequency response
Trace datasheet-response-trace-poc/v1
240 plotted pointsMedium confidence892 selected pixels of 2,655
Manufacturer datasheet, page 1
impedance
Impedance response
Trace datasheet-response-trace-poc/v1
240 plotted pointsMedium confidence2,195 selected pixels of 5,073
Manufacturer datasheet, page 1

Published graphs

SB Acoustics MW13TX-4 manufacturer graph 1

Specifications

Published by SB Acoustics

Manufacturer page

Datasheet PDF

SB Acoustics MW13TX-4 is a 5-inch 4 ohm LF driver rated at 40 W RMS. The validated T/S data includes Fs 38 Hz, Qts 0.26, Vas 16 L, Xmax 5 mm, sensitivity 87.2 dB, plus 35 cm³ Vd and 141 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 £225.24.

The published T/S values agree with each other

Thiele/Small

Fs: 38Hz
Qts: 0.26
Qes: 0.27
Qms: 5.1
Vas: 16L
Re: 3.8Ω
Le: 0.16mH

Motor and cone

BL: 5T·m
Sd: 70cm²
Mms: 7g
Xmax: 5mm
Vd †: 35cm³
Voice coil: 31mm
Flux density: 1.08T

Power and response

Sensitivity †: 87.2dB
Manufacturer sensitivity: 89dB
Power: 40W
Impedance: 4Ω
EBP †: 141 · Leans vented

Size and mounting

Weight: 0.8kg

Other published values

Cms: 2.38mm/N

Sensitivity shows 87.2 dB, calculated from the T/S values. SB Acoustics publishes 89.0 dB, 1.8 dB apart.

† Calculated by bits from the published values

What this validation status means

Everything else SB Acoustics lists

LF · Primary · 5″

BL: 5T·m
Fs: 38Hz
Le: 0.16mH
Re: 3.8Ω
Sd: 70cm²
Cms: 2.38mm/N
Mms: 7g
Qes: 0.27
Qms: 5.1
Qts: 0.26
SPL: 87.2dB
Vas: 16L
Xmax: 5mm
Power: 40W
Impedance: 4Ω
Flux density: 1.08T
Sensitivity: 89dB
Calculated sensitivity †: 87.2dB
Manufacturer sensitivity: 89dB
Voice coil: 31mm
Weight: 0.8kg

Compare

Same-size drivers, compared with the MW13TX-4. Clear differences are green when better and red when worse.

This driverMW13TX-4

Best price

£225.24

38 Hz

Qts

0.26

Vas

16 L

5 T·m

Xmax

5 mm

Sensitivity

87.2 dB

Power

40 W

SB AcousticsSB13PFC25-4

£22.98 · 90% less

Fs44 Hz +16%

Qts0.29 +12%

Vas13.4 L −16%

BL5.3 T·m +6%

Xmax4.5 mm −10%

Sensitivity87.4 dB –

SB AcousticsSB13PFCR25-4

£22.98 · 90% less

Fs44 Hz +16%

Qts0.29 +12%

Vas13.4 L −16%

BL5.3 T·m +6%

Xmax4.5 mm −10%

Sensitivity87.4 dB –

SB AcousticsSB13PFCR25-4-COAX

£44.29 · 80% less

Fs43 Hz +13%

Qts0.27 +4%

Vas14.4 L −10%

BL5.1 T·m –

Xmax4.7 mm −7%

Sensitivity87.8 dB +0.6

SB AcousticsSB13PFC25-4-COAX

£46.01 · 80% less

Fs43 Hz +13%

Qts0.27 +4%

Vas14.4 L −10%

BL5.1 T·m –

Xmax4.7 mm −7%

Sensitivity87.8 dB +0.6

SB AcousticsSB15MFC30-4

£48.66 · 78% less

Fs36 Hz −7%

Qts0.28 +8%

Vas19.4 L +21%

BL4.8 T·m −4%

Xmax5 mm –

Sensitivity86.6 dB −0.6

SB AcousticsSB15NRX2C30-4

£49.12 · 78% less

Fs35 Hz −9%

Qts0.28 +8%

Vas20.5 L +28%

BL4.7 T·m −6%

Xmax5 mm –

Sensitivity86.5 dB −0.7

Scanspeak15W/8424G00

£49.40 · 78% less

Fs46 Hz +21%

Qts0.25 −4%

Vas14.5 L −9%

BL6.6 T·m +32%

Xmax2.6 mm −48%

Sensitivity89.2 dB +2

Scanspeak15W/4424G00

£53.55 · 76% less

Fs46 Hz +21%

Qts0.24 −8%

Vas13.8 L −14%

BL5.2 T·m +4%

Xmax2.8 mm −44%

Sensitivity89.2 dB +2

SB AcousticsSB15NRXC30-4

£54.13 · 76% less

Fs41 Hz +8%

Qts0.29 +12%

Vas16.7 L +4%

BL4.7 T·m −6%

Xmax5 mm –

Sensitivity87.7 dB +0.5

SB AcousticsSB17MFC35-4

£54.89 · 76% less

Fs30 Hz −21%

Qts0.28 +8%

Vas45 L +181%

BL4.9 T·m –

Xmax5.5 mm +10%

Sensitivity88.1 dB +0.9

Scanspeak15W/8434G00

£56.10 · 75% less

Fs45 Hz +18%

Qts0.25 −4%

Vas12.8 L −20%

BL7.3 T·m +46%

Xmax4.2 mm −16%

Sensitivity88.4 dB +1.2

SB AcousticsSB17NRX2L35-4

£59.85 · 73% less

Fs41 Hz +8%

Qts0.25 −4%

Vas21.9 L +37%

BL6.5 T·m +29%

Xmax4.8 mm −4%

Sensitivity89.7 dB +2.5

CIAREHWB130

£61.12 · 73% less

Fs46 Hz +21%

Qts0.28 +8%

Vas12.5 L −22%

BL5.6 T·m +12%

Xmax4.5 mm −10%

Sensitivity88.3 dB +1.1

SB AcousticsSB17NBAC35-4

£65.93 · 71% less

Fs30 Hz −21%

Qts0.29 +12%

Vas42.6 L +166%

BL4.9 T·m –

Xmax5.5 mm +10%

Sensitivity87.7 dB +0.5

SB AcousticsSB15NAC30-4

£69.45 · 69% less

Fs35 Hz −8%

Qts0.30 +15%

Vas18.3 L +14%

BL4.8 T·m −4%

Xmax5 mm –

Sensitivity85.9 dB −1.3

SB AcousticsSB15NBAC30-4

£69.45 · 69% less

Fs33 Hz −13%

Qts0.29 +12%

Vas21 L +31%

BL4.7 T·m −6%

Xmax5 mm –

Sensitivity85.9 dB −1.3

SB AcousticsSB15CAC30-4

£76.56 · 66% less

Fs33 Hz −14%

Qts0.31 +19%

Vas20.2 L +26%

BL4.6 T·m −8%

Xmax5 mm –

Sensitivity85.1 dB −2.1

B&C5FCX44

£129.00 · 43% less

Fs61 Hz +61%

Qts0.25 −4%

Vas7 L −56%

BL10.5 T·m +110%

Xmax5 mm –

Sensitivity90.1 dB +2.9

SB AcousticsMW13P-4

£139.69 · 38% less

Fs41 Hz +8%

Qts0.27 +4%

Vas14.6 L −9%

BL4.9 T·m –

Xmax5 mm –

Sensitivity87.4 dB –

SB AcousticsMW13PNW-4

£139.69 · 38% less

Fs41 Hz +8%

Qts0.27 +4%

Vas14.6 L −9%

BL4.9 T·m –

Xmax5 mm –

Sensitivity87.4 dB –

SB AcousticsMW13P-8

£139.69 · 38% less

Fs42 Hz +9%

Qts0.30 +15%

Vas15 L −6%

BL5.7 T·m +14%

Xmax5 mm –

Sensitivity87.1 dB –

SB AcousticsMW13PNW-8

£139.69 · 38% less

Fs41 Hz +8%

Qts0.31 +19%

Vas15 L −6%

BL5.7 T·m +14%

Xmax5 mm –

Sensitivity87 dB –

SB AcousticsMW16P-4

£146.49 · 35% less

Fs28 Hz −26%

Qts0.27 +4%

Vas50.2 L +214%

BL5.2 T·m +4%

Xmax6 mm +20%

Sensitivity88 dB +0.8

SB AcousticsMW16PNW-4

£148.32 · 34% less

Fs28 Hz −26%

Qts0.27 +4%

Vas51.8 L +224%

BL5 T·m –

Xmax6 mm +20%

Sensitivity88 dB +0.8

Scanspeak15M/4531K00

£150.70 · 33% less

Fs42 Hz +11%

Qts0.27 +4%

Vas16 L –

BL6 T·m +20%

Xmax3 mm −40%

Sensitivity88.3 dB +1.1

SB AcousticsMW13TX-8

£225.24 · Same price

Fs40 Hz +5%

Qts0.32 +23%

Vas14.8 L −7%

BL5.7 T·m +14%

Xmax5 mm –

Sensitivity86.5 dB −0.7

SB AcousticsMW16TX-4

£250.36 · 11% more

Fs29 Hz −24%

Qts0.27 +4%

Vas48 L +200%

BL5.2 T·m +4%

Xmax6 mm +20%

Sensitivity88.1 dB +0.9

SB AcousticsMR13TX-4

£251.15 · 12% more

Fs44 Hz +16%

Qts0.27 +4%

Vas12.2 L −24%

BL4.9 T·m –

Xmax3 mm −40%

Sensitivity87.7 dB +0.5

Tang BandW6-1559S

No current price

Fs45 Hz +18%

Qts0.24 −8%

Vas13.3 L −17%

BL13.7 T·m +174%

Xmax5.5 mm +10%

Sensitivity88.9 dB +1.7

WavecorWF152BD06

No current price

Fs45 Hz +17%

Qts0.29 +12%

Vas11.5 L −28%

BL6.3 T·m +27%

Xmax4.5 mm −10%

Sensitivity87.3 dB –

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 25 Oct 2026 · 4 Ω · Source: inc VAT · 20%	£233.59, the lowest price		2 in stock	Visit shop at Lean Audio
Falcon Acoustics Checked 25 Oct 2026 · 4 Ω · Source: inc VAT · 20%	£239.16	2.4% above the lowest price	In stock	Visit shop at Falcon Acoustics
Willys-Hifi Checked 25 Oct 2026 · 4 Ω · Source: ex VAT · 20%	£261.76	12% above the lowest price	Stock not listed	Visit shop at Willys-Hifi
RumoH Checked 25 Oct 2026 · Ships from Netherlands · 4 Ω · Source: inc VAT Import VAT and duty may apply	£225.24		Stock not listed	Visit shop at RumoH
SoundImports Checked 25 Oct 2026 · Ships from Netherlands · 4 Ω · Source: inc VAT Import VAT and duty may apply	£230.22		4 in stock	Visit shop at SoundImports
Lautsprechershop Checked 25 Oct 2026 · Ships from Germany · 4 Ω · Source: inc VAT · 19% Import VAT and duty may apply	£247.29	5.9% above the lowest price	Special order	Visit shop at Lautsprechershop

Best price over time

Tracked since 1 Apr

Recent changes

1 OctWillys-Hifi£268.95 → £261.76Down 2.7% from £268.95
30 SepWillys-Hifi£267.95 → £268.95Up 0.4% from £267.95
28 SepWillys-Hifi£266.95 → £267.95Up 0.4% from £266.95

bits00 AUDIO

5-inch LF driver · MW13 series · 31 mm voice coil · 40 W

SB Acoustics MW13TX-4 4Ω

4 Ω

£233.59

Steady

4.6% below the average of 3 shops

Lean Audio · 2 in stock · All 6 offers

Open in 00 Simulator

Fs: 38Hz
Xmax: 5mm
SPL: 87dB
Pe: 40W
BL: 5T·m
Vd: 35cm³
Qts: 0.26
Vas: 16L

See all 21 specs

Curve provenanceInspect 3 traces

These plotted lines are Bits digitizations of manufacturer evidence, not new measurements. How provenance works

30 degrees
Frequency response
Trace datasheet-response-trace-poc/v1
240 plotted pointsMedium confidence1,580 selected pixels of 2,659
Manufacturer datasheet, page 1
60 degrees
Frequency response
Trace datasheet-response-trace-poc/v1
240 plotted pointsMedium confidence892 selected pixels of 2,655
Manufacturer datasheet, page 1
impedance
Impedance response
Trace datasheet-response-trace-poc/v1
240 plotted pointsMedium confidence2,195 selected pixels of 5,073
Manufacturer datasheet, page 1

Published graphs

Specifications

Published by SB Acoustics

Manufacturer page

Datasheet PDF

The published T/S values agree with each other

Thiele/Small

Fs: 38Hz
Qts: 0.26
Qes: 0.27
Qms: 5.1
Vas: 16L
Re: 3.8Ω
Le: 0.16mH

Motor and cone

BL: 5T·m
Sd: 70cm²
Mms: 7g
Xmax: 5mm
Vd †: 35cm³
Voice coil: 31mm
Flux density: 1.08T

Power and response

Sensitivity †: 87.2dB
Manufacturer sensitivity: 89dB
Power: 40W
Impedance: 4Ω
EBP †: 141 · Leans vented

Size and mounting

Weight: 0.8kg

Other published values

Cms: 2.38mm/N

Sensitivity shows 87.2 dB, calculated from the T/S values. SB Acoustics publishes 89.0 dB, 1.8 dB apart.

† Calculated by bits from the published values

What this validation status means

Everything else SB Acoustics lists

LF · Primary · 5″

BL: 5T·m
Fs: 38Hz
Le: 0.16mH
Re: 3.8Ω
Sd: 70cm²
Cms: 2.38mm/N
Mms: 7g
Qes: 0.27
Qms: 5.1
Qts: 0.26
SPL: 87.2dB
Vas: 16L
Xmax: 5mm
Power: 40W
Impedance: 4Ω
Flux density: 1.08T
Sensitivity: 89dB
Calculated sensitivity †: 87.2dB
Manufacturer sensitivity: 89dB
Voice coil: 31mm
Weight: 0.8kg

Compare

Same-size drivers, compared with the MW13TX-4. Clear differences are green when better and red when worse.

This driverMW13TX-4

Best price

£225.24

38 Hz

Qts

0.26

Vas

16 L

5 T·m

Xmax

5 mm

Sensitivity

87.2 dB

Power

40 W

SB AcousticsSB13PFC25-4

£22.98 · 90% less

Fs44 Hz +16%

Qts0.29 +12%

Vas13.4 L −16%

BL5.3 T·m +6%

Xmax4.5 mm −10%

Sensitivity87.4 dB –

SB AcousticsSB13PFCR25-4

£22.98 · 90% less

Fs44 Hz +16%

Qts0.29 +12%

Vas13.4 L −16%

BL5.3 T·m +6%

Xmax4.5 mm −10%

Sensitivity87.4 dB –

SB AcousticsSB13PFCR25-4-COAX

£44.29 · 80% less

Fs43 Hz +13%

Qts0.27 +4%

Vas14.4 L −10%

BL5.1 T·m –

Xmax4.7 mm −7%

Sensitivity87.8 dB +0.6

SB AcousticsSB13PFC25-4-COAX

£46.01 · 80% less

Fs43 Hz +13%

Qts0.27 +4%

Vas14.4 L −10%

BL5.1 T·m –

Xmax4.7 mm −7%

Sensitivity87.8 dB +0.6

SB AcousticsSB15MFC30-4

£48.66 · 78% less

Fs36 Hz −7%

Qts0.28 +8%

Vas19.4 L +21%

BL4.8 T·m −4%

Xmax5 mm –

Sensitivity86.6 dB −0.6

SB AcousticsSB15NRX2C30-4

£49.12 · 78% less

Fs35 Hz −9%

Qts0.28 +8%

Vas20.5 L +28%

BL4.7 T·m −6%

Xmax5 mm –

Sensitivity86.5 dB −0.7

Scanspeak15W/8424G00

£49.40 · 78% less

Fs46 Hz +21%

Qts0.25 −4%

Vas14.5 L −9%

BL6.6 T·m +32%

Xmax2.6 mm −48%

Sensitivity89.2 dB +2

Scanspeak15W/4424G00

£53.55 · 76% less

Fs46 Hz +21%

Qts0.24 −8%

Vas13.8 L −14%

BL5.2 T·m +4%

Xmax2.8 mm −44%

Sensitivity89.2 dB +2

SB AcousticsSB15NRXC30-4

£54.13 · 76% less

Fs41 Hz +8%

Qts0.29 +12%

Vas16.7 L +4%

BL4.7 T·m −6%

Xmax5 mm –

Sensitivity87.7 dB +0.5

SB AcousticsSB17MFC35-4

£54.89 · 76% less

Fs30 Hz −21%

Qts0.28 +8%

Vas45 L +181%

BL4.9 T·m –

Xmax5.5 mm +10%

Sensitivity88.1 dB +0.9

Scanspeak15W/8434G00

£56.10 · 75% less

Fs45 Hz +18%

Qts0.25 −4%

Vas12.8 L −20%

BL7.3 T·m +46%

Xmax4.2 mm −16%

Sensitivity88.4 dB +1.2

SB AcousticsSB17NRX2L35-4

£59.85 · 73% less

Fs41 Hz +8%

Qts0.25 −4%

Vas21.9 L +37%

BL6.5 T·m +29%

Xmax4.8 mm −4%

Sensitivity89.7 dB +2.5

CIAREHWB130

£61.12 · 73% less

Fs46 Hz +21%

Qts0.28 +8%

Vas12.5 L −22%

BL5.6 T·m +12%

Xmax4.5 mm −10%

Sensitivity88.3 dB +1.1

SB AcousticsSB17NBAC35-4

£65.93 · 71% less

Fs30 Hz −21%

Qts0.29 +12%

Vas42.6 L +166%

BL4.9 T·m –

Xmax5.5 mm +10%

Sensitivity87.7 dB +0.5

SB AcousticsSB15NAC30-4

£69.45 · 69% less

Fs35 Hz −8%

Qts0.30 +15%

Vas18.3 L +14%

BL4.8 T·m −4%

Xmax5 mm –

Sensitivity85.9 dB −1.3

SB AcousticsSB15NBAC30-4

£69.45 · 69% less

Fs33 Hz −13%

Qts0.29 +12%

Vas21 L +31%

BL4.7 T·m −6%

Xmax5 mm –

Sensitivity85.9 dB −1.3

SB AcousticsSB15CAC30-4

£76.56 · 66% less

Fs33 Hz −14%

Qts0.31 +19%

Vas20.2 L +26%

BL4.6 T·m −8%

Xmax5 mm –

Sensitivity85.1 dB −2.1

B&C5FCX44

£129.00 · 43% less

Fs61 Hz +61%

Qts0.25 −4%

Vas7 L −56%

BL10.5 T·m +110%

Xmax5 mm –

Sensitivity90.1 dB +2.9

SB AcousticsMW13P-4

£139.69 · 38% less

Fs41 Hz +8%

Qts0.27 +4%

Vas14.6 L −9%

BL4.9 T·m –

Xmax5 mm –

Sensitivity87.4 dB –

SB AcousticsMW13PNW-4

£139.69 · 38% less

Fs41 Hz +8%

Qts0.27 +4%

Vas14.6 L −9%

BL4.9 T·m –

Xmax5 mm –

Sensitivity87.4 dB –

SB AcousticsMW13P-8

£139.69 · 38% less

Fs42 Hz +9%

Qts0.30 +15%

Vas15 L −6%

BL5.7 T·m +14%

Xmax5 mm –

Sensitivity87.1 dB –

SB AcousticsMW13PNW-8

£139.69 · 38% less

Fs41 Hz +8%

Qts0.31 +19%

Vas15 L −6%

BL5.7 T·m +14%

Xmax5 mm –

Sensitivity87 dB –

SB AcousticsMW16P-4

£146.49 · 35% less

Fs28 Hz −26%

Qts0.27 +4%

Vas50.2 L +214%

BL5.2 T·m +4%

Xmax6 mm +20%

Sensitivity88 dB +0.8

SB AcousticsMW16PNW-4

£148.32 · 34% less

Fs28 Hz −26%

Qts0.27 +4%

Vas51.8 L +224%

BL5 T·m –

Xmax6 mm +20%

Sensitivity88 dB +0.8

Scanspeak15M/4531K00

£150.70 · 33% less

Fs42 Hz +11%

Qts0.27 +4%

Vas16 L –

BL6 T·m +20%

Xmax3 mm −40%

Sensitivity88.3 dB +1.1

SB AcousticsMW13TX-8

£225.24 · Same price

Fs40 Hz +5%

Qts0.32 +23%

Vas14.8 L −7%

BL5.7 T·m +14%

Xmax5 mm –

Sensitivity86.5 dB −0.7

SB AcousticsMW16TX-4

£250.36 · 11% more

Fs29 Hz −24%

Qts0.27 +4%

Vas48 L +200%

BL5.2 T·m +4%

Xmax6 mm +20%

Sensitivity88.1 dB +0.9

SB AcousticsMR13TX-4

£251.15 · 12% more

Fs44 Hz +16%

Qts0.27 +4%

Vas12.2 L −24%

BL4.9 T·m –

Xmax3 mm −40%

Sensitivity87.7 dB +0.5

Tang BandW6-1559S

No current price

Fs45 Hz +18%

Qts0.24 −8%

Vas13.3 L −17%

BL13.7 T·m +174%

Xmax5.5 mm +10%

Sensitivity88.9 dB +1.7

WavecorWF152BD06

No current price

Fs45 Hz +17%

Qts0.29 +12%

Vas11.5 L −28%

BL6.3 T·m +27%

Xmax4.5 mm −10%

Sensitivity87.3 dB –

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 25 Oct 2026 · 4 Ω · Source: inc VAT · 20%	£233.59, the lowest price		2 in stock	Visit shop at Lean Audio
Falcon Acoustics Checked 25 Oct 2026 · 4 Ω · Source: inc VAT · 20%	£239.16	2.4% above the lowest price	In stock	Visit shop at Falcon Acoustics
Willys-Hifi Checked 25 Oct 2026 · 4 Ω · Source: ex VAT · 20%	£261.76	12% above the lowest price	Stock not listed	Visit shop at Willys-Hifi
RumoH Checked 25 Oct 2026 · Ships from Netherlands · 4 Ω · Source: inc VAT Import VAT and duty may apply	£225.24		Stock not listed	Visit shop at RumoH
SoundImports Checked 25 Oct 2026 · Ships from Netherlands · 4 Ω · Source: inc VAT Import VAT and duty may apply	£230.22		4 in stock	Visit shop at SoundImports
Lautsprechershop Checked 25 Oct 2026 · Ships from Germany · 4 Ω · Source: inc VAT · 19% Import VAT and duty may apply	£247.29	5.9% above the lowest price	Special order	Visit shop at Lautsprechershop

Best price over time

Tracked since 1 Apr

Recent changes

1 OctWillys-Hifi£268.95 → £261.76Down 2.7% from £268.95
30 SepWillys-Hifi£267.95 → £268.95Up 0.4% from £267.95
28 SepWillys-Hifi£266.95 → £267.95Up 0.4% from £266.95