SB AcousticsSB15SFCR39-4
£39.73 · 55% less, betterFs31 Hz +11%, worse
Qts0.32 −11%, better
Vas49.9 L +19%, worse
BL6.9 T·m +11%, better
Xmax5.5 mm –
Sensitivity88.4 dB +2.7, better
6-inch LF driver · SB17 series · 36 mm voice coil · 60 W
SB Acoustics SB17CAC35-8 8Ω
8 Ω
£99.52
21%Willys-Hifi · All 6 offers
- Fs
- 28Hz
- Xmax
- 5.5mm
- SPL
- 86dB
- Pe
- 60W
- BL
- 6.2T·m
- Vd
- 65cm³
- Qts
- 0.36
- Vas
- 42L
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 2 traces
These plotted lines are Bits digitizations of manufacturer evidence, not new measurements. How provenance works
- Trace datasheet-response-trace-poc/v1
60 degrees
Frequency response
240 plotted pointsMedium confidence1,283 selected pixels of 2,717 - Trace datasheet-response-trace-poc/v1
impedance
Impedance response
240 plotted pointsMedium confidence2,062 selected pixels of 5,616
Published graphs
SB Acoustics SB17CAC35-8 is a 6-inch 8 ohm LF driver rated at 60 W RMS. The validated T/S data includes Fs 28 Hz, Qts 0.36, Vas 42 L, Xmax 5.5 mm, sensitivity 85.7 dB, plus 65 cm³ Vd and 70 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 £87.88.
The published T/S values agree with each other
Thiele/Small
- Fs
- 28Hz
- Qts
- 0.36
- Qes
- 0.40
- Qms
- 4.5
- Vas
- 42L
- Re
- 5.7Ω
- Le
- 0.15mH
Motor and cone
- BL
- 6.2T·m
- Sd
- 118cm²
- Mms
- 15g
- Xmax
- 5.5mm
- Vd †
- 65cm³
- Voice coil
- 36mm
- Flux density
- 1T
Power and response
- Sensitivity †
- 85.7dB
- Manufacturer sensitivity
- 86.5dB
- Power
- 60W
- Impedance
- 8Ω
- EBP †
- 70 · Sealed or vented
Size and mounting
- Weight
- 1.6kg
Other published values
- Cms
- 2.13mm/N
† Calculated by bits from the published values
What this validation status means
Everything else SB Acoustics lists
LF · Primary · 6″
- BL
- 6.2T·m
- Fs
- 28Hz
- Le
- 0.15mH
- Re
- 5.7Ω
- Sd
- 118cm²
- Cms
- 2.13mm/N
- Mms
- 15g
- Qes
- 0.40
- Qms
- 4.5
- Qts
- 0.36
- SPL
- 85.7dB
- Vas
- 42L
- Xmax
- 5.5mm
- Power
- 60W
- Impedance
- 8Ω
- Flux density
- 1T
- Sensitivity
- 86.5dB
- Calculated sensitivity †
- 85.7dB
- Manufacturer sensitivity
- 86.5dB
- Voice coil
- 36mm
- Weight
- 1.6kg
02
Compare
Same-size drivers, compared with the SB17CAC35-8. Clear differences are green when better and red when worse.
This driverSB17CAC35-8
Best price
£87.88
Fs
28 Hz
Qts
0.36
Vas
42 L
BL
6.2 T·m
Xmax
5.5 mm
Sensitivity
85.7 dB
Power
60 W
SB AcousticsSB17MFC35-8
£54.89 · 38% less, betterFs33 Hz +18%, worse
Qts0.37 –
Vas39 L −7%
BL5.9 T·m −5%
Xmax5.5 mm –
Sensitivity87.5 dB +1.8
SB AcousticsSB17NRX2C35-4
£55.41 · 37% less, betterFs36 Hz +29%, worse
Qts0.37 –
Vas27.6 L −34%, better
BL4.9 T·m −21%, worse
Xmax5.5 mm –
Sensitivity87 dB +1.3
SB AcousticsSB17NRXC35-8
£58.60 · 33% less, betterFs32 Hz +14%, worse
Qts0.34 −6%
Vas44.5 L +6%
BL5.9 T·m −5%
Xmax5.5 mm –
Sensitivity88.1 dB +2.4, better
SB AcousticsSB17NBAC35-8
£65.93 · 25% less, betterFs32 Hz +13%, worse
Qts0.35 –
Vas45 L +7%
BL5.9 T·m −5%
Xmax5.5 mm –
Sensitivity87.7 dB +2, better
SB AcousticsSB15NAC30-8
£69.45 · 21% less, betterFs36 Hz +27%, worse
Qts0.37 –
Vas17.7 L −58%, better
BL5.9 T·m −5%
Xmax5 mm −9%
Sensitivity85.1 dB −0.6
SB AcousticsSB17NAC35-8
£70.75 · 19% less, betterFs32 Hz +13%, worse
Qts0.42 +17%, worse
Vas33 L −21%, better
BL6.2 T·m –
Xmax5.5 mm –
Sensitivity85.6 dB –
SB AcousticsSB17CRC35-8
£85.53 · 3% lessFs28 Hz –
Qts0.34 −6%
Vas48 L +14%, worse
BL6 T·m −3%
Xmax5.5 mm –
Sensitivity86.6 dB +0.9
SB AcousticsSB17CRC35-4
£85.53 · 3% lessFs32 Hz +13%, worse
Qts0.32 −11%, better
Vas35.5 L −15%, better
BL5 T·m −19%, worse
Xmax5.5 mm –
Sensitivity87 dB +1.3
WavecorWF182BD12
£118.19 · 34% more, worseFs30 Hz +5%
Qts0.37 –
Vas32.4 L −23%, better
BL8.2 T·m +32%, better
Xmax5.5 mm –
Sensitivity85.4 dB –
WavecorWF182BD17
£121.93 · 39% more, worseFs33 Hz +18%, worse
Qts0.35 –
Vas24.3 L −42%, better
BL6.5 T·m +5%
Xmax5.5 mm –
Sensitivity85.8 dB –
SB AcousticsMW16P-8
£145.30 · 65% more, worseFs29 Hz +4%
Qts0.33 −8%
Vas48 L +14%, worse
BL6.3 T·m –
Xmax6 mm +9%
Sensitivity87.3 dB +1.6
SB AcousticsMW16P-12
£146.49 · 67% more, worseFs31 Hz +9%
Qts0.37 –
Vas47.3 L +13%, worse
BL7.4 T·m +19%, better
Xmax6.2 mm +13%, better
Sensitivity87.3 dB +1.6
SB AcousticsMW16PNW-8
£146.49 · 67% more, worseFs29 Hz +4%
Qts0.32 −11%, better
Vas49.9 L +19%, worse
BL6.3 T·m –
Xmax6 mm +9%
Sensitivity87.6 dB +1.9
Scanspeak18W/8531G00
£168.81 · 92% more, worseFs28 Hz –
Qts0.36 –
Vas58.2 L +39%, worse
BL6.8 T·m +10%
Xmax6.5 mm +18%, better
Sensitivity87.2 dB +1.5
Scanspeak18W/4531G01
£168.82 · 92% more, worseFs34 Hz +21%, worse
Qts0.35 –
Vas45.6 L +9%
BL5.7 T·m −8%
Xmax6.5 mm +18%, better
Sensitivity88.8 dB +3.1, better
Scanspeak18W/4531G00
£179.98 · 105% more, worseFs33 Hz +18%, worse
Qts0.35 –
Vas41.9 L –
BL5.7 T·m −8%
Xmax6.5 mm +18%, better
Sensitivity88 dB +2.3, better
WavecorWF182BD20
£188.39 · 114% more, worseFs30 Hz +5%
Qts0.37 –
Vas32.4 L −23%, better
BL8.2 T·m +32%, better
Xmax5.5 mm –
Sensitivity85.4 dB –
SB AcousticsMW16TX-8
£250.36 · 185% more, worseFs29 Hz +5%
Qts0.33 −8%
Vas48 L +14%, worse
BL6.3 T·m –
Xmax6 mm +9%
Sensitivity87.4 dB +1.7
Scanspeak18WU/4747T00
£288.83 · 229% more, worseFs36 Hz +29%, worse
Qts0.35 –
Vas36 L −14%, better
BL5.9 T·m −5%
Xmax9 mm +64%, better
Sensitivity88.4 dB +2.7, better
Scanspeak18WU/4741T00
£304.20 · 246% more, worseFs34 Hz +21%, worse
Qts0.36 –
Vas38.4 L −9%
BL5.9 T·m −5%
Xmax9 mm +64%, better
Sensitivity87.9 dB +2.2, better
SB AcousticsMW16PF-8
No current priceFs29 Hz +4%
Qts0.38 +6%
Vas48.4 L +15%, worse
BL5.8 T·m −6%
Xmax5.5 mm –
Sensitivity86.5 dB +0.8
Audio Technology6 H 52 17 06 SD
No current priceFs33 Hz +18%, worse
Qts0.35 –
Vas47 L +12%, worse
BL6.6 T·m +6%
Xmax6.3 mm +15%, better
Sensitivity88.1 dB +2.4, better
Supravox165 GMF
No current priceFs70 Hz +150%, worse
Qts0.39 +8%
Vas40 L −5%
BL5.6 T·m −10%
Xmax6 mm +9%
Sensitivity97.2 dB +11.5, better
WavecorWF182BD09
No current priceFs33 Hz +18%, worse
Qts0.35 –
Vas24.3 L −42%, better
BL6.5 T·m +5%
Xmax5.5 mm –
Sensitivity85.8 dB –
HiViS6.5R
No current priceFs41 Hz +46%, worse
Qts0.38 +6%
Vas23.2 L −45%, better
BL6.5 T·m +5%
Xmax5.8 mm +5%
Sensitivity87.8 dB +2.1, better
WavecorWF182BD10
No current priceFs29 Hz –
Qts0.31 −14%, better
Vas32.4 L −23%, better
BL6.5 T·m +5%
Xmax5.5 mm –
Sensitivity85.7 dB –
WavecorWF182BD18
No current priceFs29 Hz –
Qts0.31 −14%, better
Vas32.4 L −23%, better
BL6.5 T·m +5%
Xmax5.5 mm –
Sensitivity85.7 dB –
HiViSS6.5
No current priceFs42 Hz +50%, worse
Qts0.39 +8%
Vas24.8 L −41%, better
BL6.4 T·m +3%
Xmax5.8 mm +5%
Sensitivity88.1 dB +2.4, better
SB AcousticsMW16PF-4
No current priceFs28 Hz –
Qts0.33 −8%
Vas49 L +17%, worse
BL4.7 T·m −24%, worse
Xmax5.5 mm –
Sensitivity86.9 dB +1.2
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 53 ratings · Checked 26 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 | £99.52, the lowest price | Stock not listed | Visit shop at Willys-Hifi | |
Lean Audio | £82.13 | Back order | Visit shop at Lean Audio | |
Lean Business | £82.13 | Out of stock | Visit shop at Lean Business | |
Hifisound Import VAT and duty may apply · under 7 working days | £83.48 | Back order (under 7 working days) | Visit shop at Hifisound | |
SoundImports Import VAT and duty may apply | £87.88 | 8 in stock | Visit shop at SoundImports | |
RumoH Import VAT and duty may apply | £94.06 | Stock not listed | Visit shop at RumoH |
Best price over time
Tracked since 1 Apr
Recent changes
- 1 OctWillys-Hifi£101.95 → £99.52Down 2.4% from £101.95
- 2 SepWillys-Hifi£98.95 → £101.95Up 3.0% from £98.95
- 4 AugWillys-Hifi£95.95 → £98.95Up 3.1% from £95.95