SB AcousticsSB13PFCR25-4-COAX
£44.29 · 17% less, betterFs43 Hz −7%
Qts0.27 +13%, worse
Vas14.4 L +4%
BL5.1 T·m –
Xmax4.7 mm +66%, better
Sensitivity87.8 dB −1.4
6-inch LF driver · Discovery series · 25 mm voice coil · 60 W
Scanspeak 15W/4424G00 4Ω
4 Ω
£56.40
5.3%Falcon Acoustics · In stock · All 4 offers
- Fs
- 46Hz
- Xmax
- 2.8mm
- SPL
- 89dB
- Pe
- 60W
- BL
- 5.2T·m
- Vd
- 22cm³
- Qts
- 0.24
- Vas
- 14L
Scanspeak 15W/4424G00 is a 6-inch 4 ohm LF driver rated at 60 W RMS. The validated T/S data includes Fs 46 Hz, Qts 0.24, Vas 13.8 L, Xmax 2.8 mm, sensitivity 89.2 dB, plus 22 cm³ Vd and 177 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 £53.55.
Partial source evidence
Automated T/S checks passed, but some material low-frequency parameters are not published for this record.
Material fields not published: Mms
- Manufacturer page linked
- Datasheet linked
- Canonical units normalized for comparison
- Vd can be derived from Sd and Xmax
- EBP can be derived from Fs and Qes
Thiele/Small
- Fs
- 46Hz
- Qts
- 0.24
- Qes
- 0.26
- Qms
- 3.3
- Vas
- 13.8L
- Re
- 3.1Ω
- Le
- 0.37mH
Motor and cone
- BL
- 5.2T·m
- Sd
- 80cm²
- Xmax
- 2.8mm
- Vd †
- 22cm³
- Voice coil
- 25mm
Power and response
- Sensitivity †
- 89.2dB
- Manufacturer sensitivity
- 90.5dB
- Power
- 60W
- Impedance
- 4Ω
- Min. impedance
- 4.2Ω
- EBP †
- 177 · Leans vented
Size and mounting
- Diameter
- 150mm
Other published values
- Cms
- 1.51mm/N
- Rms
- 0.70kg/s
- Xmech
- 8
- Power Peak
- 120
Sensitivity shows 89.2 dB, calculated from the T/S values. Scanspeak publishes 90.5 dB, 1.3 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else Scanspeak lists
LF · Primary · 6″
- BL
- 5.2T·m
- Fs
- 46Hz
- Le
- 0.37mH
- Re
- 3.1Ω
- Sd
- 80cm²
- Cms
- 1.51mm/N
- Qes
- 0.26
- Qms
- 3.3
- Qts
- 0.24
- Rms
- 0.70kg/s
- SPL
- 89.2dB
- Vas
- 13.8L
- Xmax
- 2.8mm
- Xmech
- 8
- Power
- 60W
- Impedance
- 4Ω
- Power Peak
- 120
- Sensitivity
- 90.5dB
- Calculated sensitivity †
- 89.2dB
- Manufacturer sensitivity
- 90.5dB
- Min. impedance
- 4.2Ω
- Voice coil
- 25mm
- Diameter
- 150mm
02
Compare
Same-size drivers, compared with the 15W/4424G00. Clear differences are green when better and red when worse.
This driver15W/4424G00
Best price
£53.55
Fs
46 Hz
Qts
0.24
Vas
13.8 L
BL
5.2 T·m
Xmax
2.8 mm
Sensitivity
89.2 dB
Power
60 W
SB AcousticsSB13PFC25-4-COAX
£46.01 · 14% less, betterFs43 Hz −7%
Qts0.27 +13%, worse
Vas14.4 L +4%
BL5.1 T·m –
Xmax4.7 mm +66%, better
Sensitivity87.8 dB −1.4
Scanspeak15W/8424G00
£49.40 · 8% less, betterFs46 Hz –
Qts0.25 +4%
Vas14.5 L +5%
BL6.6 T·m +27%, better
Xmax2.6 mm −7%
Sensitivity89.2 dB –
WavecorWF146WA05
£53.11 · Same priceFs41 Hz −11%, better
Qts0.38 +58%, worse
Vas15.2 L +10%, worse
BL5 T·m −4%
Xmax3 mm +7%
Sensitivity86.2 dB −3, worse
Scanspeak12W/4524G00
£55.26 · 3% moreFs50 Hz +9%
Qts0.27 +13%, worse
Vas8.2 L −41%, better
BL4.4 T·m −15%, worse
Xmax3 mm +7%
Sensitivity87.4 dB −1.8
Scanspeak15W/8434G00
£56.10 · 5% moreFs45 Hz –
Qts0.25 +4%
Vas12.8 L −7%
BL7.3 T·m +40%, better
Xmax4.2 mm +50%, better
Sensitivity88.4 dB −0.8
Scanspeak15W/4434G00
£58.57 · 9% more, worseFs43 Hz −7%
Qts0.21 −13%, better
Vas12.8 L −7%
BL5.9 T·m +13%, better
Xmax4.3 mm +54%, better
Sensitivity88.7 dB −0.5
CIAREHWB130
£61.12 · 14% more, worseFs46 Hz –
Qts0.28 +17%, worse
Vas12.5 L −9%
BL5.6 T·m +8%
Xmax4.5 mm +61%, better
Sensitivity88.3 dB −0.9
Eighteen Sound6ND430
£109.14 · 104% more, worseFs64 Hz +39%, worse
Qts0.24 –
Vas12.2 L −12%, better
BL7.8 T·m +50%, better
Xmax5 mm +79%, better
Sensitivity93.1 dB +3.9, better
SB AcousticsMR13P-4
£115.00 · 115% more, worseFs41 Hz −11%, better
Qts0.23 −4%
Vas19.4 L +41%, worse
BL4.3 T·m −17%, worse
Xmax3 mm +7%
Sensitivity89.3 dB –
SB AcousticsMR13PNW-4
£115.00 · 115% more, worseFs41 Hz −11%, better
Qts0.23 −4%
Vas19.4 L +41%, worse
BL4.3 T·m −17%, worse
Xmax3 mm +7%
Sensitivity89.3 dB –
SB AcousticsMR13PNW-8
£115.00 · 115% more, worseFs47 Hz –
Qts0.30 +25%, worse
Vas12.9 L −7%
BL6.2 T·m +19%, better
Xmax3 mm +7%
Sensitivity88.2 dB −1
SB AcousticsMR13P-8
£135.77 · 154% more, worseFs45 Hz –
Qts0.31 +29%, worse
Vas12.5 L −9%
BL6.1 T·m +17%, better
Xmax3 mm +7%
Sensitivity87.4 dB −1.8
SB AcousticsMW13P-4
£139.69 · 161% more, worseFs41 Hz −11%, better
Qts0.27 +13%, worse
Vas14.6 L +6%
BL4.9 T·m −6%
Xmax5 mm +79%, better
Sensitivity87.4 dB −1.8
SB AcousticsMW13PNW-4
£139.69 · 161% more, worseFs41 Hz −11%, better
Qts0.27 +13%, worse
Vas14.6 L +6%
BL4.9 T·m −6%
Xmax5 mm +79%, better
Sensitivity87.4 dB −1.8
Scanspeak15M/4531K00
£150.70 · 181% more, worseFs42 Hz −9%
Qts0.27 +13%, worse
Vas16 L +16%, worse
BL6 T·m +15%, better
Xmax3 mm +7%
Sensitivity88.3 dB −0.9
SB AcousticsMR16P-4
£159.05 · 197% more, worseFs31 Hz −33%, better
Qts0.25 +4%
Vas47.2 L +242%, worse
BL5.2 T·m –
Xmax3.1 mm +11%, better
Sensitivity89.4 dB –
SB AcousticsMR16PNW-4
£159.05 · 197% more, worseFs31 Hz −33%, better
Qts0.25 +4%
Vas47.2 L +242%, worse
BL5.2 T·m –
Xmax3.1 mm +11%, better
Sensitivity89.4 dB –
Scanspeak18M/4631T00
£192.54 · 260% more, worseFs65 Hz +41%, worse
Qts0.60 +150%, worse
Vas14 L –
BL5.6 T·m +8%
Xmax3 mm +7%
Sensitivity89.6 dB –
SB AcousticsMW13TX-4
£225.24 · 321% more, worseFs38 Hz −17%, better
Qts0.26 +8%
Vas16 L +16%, worse
BL5 T·m −4%
Xmax5 mm +79%, better
Sensitivity87.2 dB −2, worse
SB AcousticsMR13TX-4
£251.15 · 369% more, worseFs44 Hz −4%
Qts0.27 +13%, worse
Vas12.2 L −12%, better
BL4.9 T·m −6%
Xmax3 mm +7%
Sensitivity87.7 dB −1.5
Scanspeak15WU/4741T00
£261.31 · 388% more, worseFs34 Hz −26%, better
Qts0.23 −4%
Vas20 L +45%, worse
BL6 T·m +15%, better
Xmax9 mm +221%, better
Sensitivity87 dB −2.2, worse
Scanspeak12MU/4731T00
£267.60 · 400% more, worseFs64 Hz +39%, worse
Qts0.24 –
Vas5.4 L −61%, better
BL5.1 T·m –
Xmax3.5 mm +25%, better
Sensitivity89.4 dB –
PurifiPTT5.25X04-NFA-01
£334.88 · 525% more, worseFs29 Hz −37%, better
Qts0.24 –
Vas13 L −6%
BL7.9 T·m +52%, better
Xmax9.8 mm +250%, better
Sensitivity83.1 dB −6.1, worse
PurifiPTT5.25M04-NAA-05
No current priceFs39 Hz −15%, better
Qts0.24 –
Vas9.9 L −28%, better
BL8.1 T·m +56%, better
Xmax2.9 mm +4%
Sensitivity85.7 dB −3.5, worse
Dayton AudioPS65LP-4
No current priceFs67 Hz +46%, worse
Qts0.24 –
Vas17.3 L +25%, worse
BL6 T·m +15%, better
Xmax4 mm +43%, better
Sensitivity95.1 dB +5.9, better
Tang BandW6-1559S
No current priceFs45 Hz –
Qts0.24 –
Vas13.3 L −3%
BL13.7 T·m +164%, better
Xmax5.5 mm +96%, better
Sensitivity88.9 dB –
Tang BandW5-1611SA
No current priceFs60 Hz +30%, worse
Qts0.44 +83%, worse
Vas13.0 L −6%
BL5.2 T·m –
Xmax3 mm +7%
Sensitivity88.7 dB −0.5
AccutonC168-6-990
No current priceFs55 Hz +20%, worse
Qts0.21 −13%, better
Vas10.3 L −25%, better
BL11.7 T·m +124%, better
Xmax3 mm +7%
Sensitivity90.9 dB +1.7
KartesianCOX165_VPA
No current priceFs61 Hz +33%, worse
Qts0.26 +7%
Vas14.1 L –
BL9.9 T·m +91%, better
Xmax3 mm +7%
Sensitivity93.5 dB +4.3, better
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
- SoundImports5.0 out of 52 ratings · Checked 25 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 |
|---|---|---|---|---|
Falcon Acoustics | £56.40, the lowest price | In stock | Visit shop at Falcon Acoustics | |
Willys-Hifi | £59.56 | 5.6% above the lowest price | Stock not listed | Visit shop at Willys-Hifi |
SoundImports Import VAT and duty may apply | £53.55 | 18 in stock | Visit shop at SoundImports |
Best price over time
Tracked since 1 Apr
Recent changes
- 1 OctWillys-Hifi£61.95 → £59.56Down 3.9% from £61.95
- 30 SepWillys-Hifi£60.95 → £61.95Up 1.6% from £60.95
- 26 AugWillys-Hifi£61.95 → £60.95Down 1.6% from £61.95