SB AcousticsSB16PFCR25-8
£24.27 · 83% less, betterFs38 Hz +52%, worse
Qts0.40 +5%
Vas27 L −61%, better
BL6.2 T·m +5%
Xmax4.5 mm −10%, worse
Sensitivity86.9 dB +1.2
7-inch LF driver · Classic series · 38 mm voice coil · 70 W
Scanspeak 18W/8535-01 8Ω
8 Ω
- Fs
- 25Hz
- Xmax
- 5mm
- SPL
- 86dB
- Pe
- 70W
- BL
- 5.9T·m
- Vd
- 73cm³
- Qts
- 0.38
- Vas
- 69L
Scanspeak 18W/8535-01 is a 7-inch 8 ohm LF driver rated at 70 W RMS. The validated T/S data includes Fs 25 Hz, Qts 0.38, Vas 68.9 L, Xmax 5 mm, sensitivity 85.7 dB, plus 73 cm³ Vd and 54 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 £145.25.
The published T/S values agree with each other
Thiele/Small
- Fs
- 25Hz
- Qts
- 0.38
- Qes
- 0.46
- Qms
- 2.1
- Vas
- 68.9L
- Re
- 5.9Ω
- Le
- 0.33mH
Motor and cone
- BL
- 5.9T·m
- Sd
- 145cm²
- Mms
- 17g
- Xmax
- 5mm
- Vd †
- 73cm³
- Voice coil
- 38mm
Power and response
- Sensitivity †
- 85.7dB
- Manufacturer sensitivity
- 87dB
- Power
- 70W
- Impedance
- 8Ω
- Min. impedance
- 6.8Ω
- EBP †
- 54 · Sealed or vented
Size and mounting
- Diameter
- 180mm
Other published values
- Cms
- 2.30mm/N
- Rms
- 1.33kg/s
- Xmech
- 10
- Power Peak
- 170
Sensitivity shows 85.7 dB, calculated from the T/S values. Scanspeak publishes 87.0 dB, 1.3 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else Scanspeak lists
LF · Primary · 7″
- BL
- 5.9T·m
- Fs
- 25Hz
- Le
- 0.33mH
- Re
- 5.9Ω
- Sd
- 145cm²
- Cms
- 2.30mm/N
- Mms
- 17g
- Qes
- 0.46
- Qms
- 2.1
- Qts
- 0.38
- Rms
- 1.33kg/s
- SPL
- 85.7dB
- Vas
- 68.9L
- Xmax
- 5mm
- Xmech
- 10
- Power
- 70W
- Impedance
- 8Ω
- Power Peak
- 170
- Sensitivity
- 87dB
- Calculated sensitivity †
- 85.7dB
- Manufacturer sensitivity
- 87dB
- Min. impedance
- 6.8Ω
- Voice coil
- 38mm
- Diameter
- 180mm
02
Compare
Same-size drivers, compared with the 18W/8535-01. Clear differences are green when better and red when worse.
This driver18W/8535-01
Best price
£145.25
Fs
25 Hz
Qts
0.38
Vas
68.9 L
BL
5.9 T·m
Xmax
5 mm
Sensitivity
85.7 dB
Power
70 W
SB AcousticsSB16PFC25-8
£27.08 · 81% less, betterFs38 Hz +52%, worse
Qts0.40 +5%
Vas27 L −61%, better
BL6.2 T·m +5%
Xmax4.5 mm −10%, worse
Sensitivity86.9 dB +1.2
SB AcousticsSB20PFCR30-4
£31.27 · 78% less, betterFs34 Hz +36%, worse
Qts0.33 −13%, better
Vas66.2 L −4%
BL6.6 T·m +12%, better
Xmax5.8 mm +15%, better
Sensitivity90.5 dB +4.8, better
SB AcousticsSB20PFCR30-8
£33.07 · 77% less, betterFs34 Hz +36%, worse
Qts0.37 –
Vas66.2 L −4%
BL7.7 T·m +31%, better
Xmax5.8 mm +15%, better
Sensitivity89.8 dB +4.1, better
SB AcousticsSB20PFC30-8
£35.17 · 76% less, betterFs34 Hz +36%, worse
Qts0.37 –
Vas66.2 L −4%
BL7.7 T·m +31%, better
Xmax5.7 mm +13%, better
Sensitivity89.8 dB +4.1, better
SB AcousticsSB20PFC30-4
£35.17 · 76% less, betterFs34 Hz +35%, worse
Qts0.33 −13%, better
Vas66.2 L −4%
BL6.6 T·m +12%, better
Xmax5.8 mm +15%, better
Sensitivity90.4 dB +4.7, better
Dayton AudioSIG180-4
£41.13 · 72% less, betterFs41 Hz +62%, worse
Qts0.38 –
Vas23.2 L −66%, better
BL6.6 T·m +12%, better
Xmax5 mm –
Sensitivity87.8 dB +2.1, better
CIAREHW161N
£43.54 · 70% less, betterFs47 Hz +88%, worse
Qts0.37 –
Vas19.9 L −71%, better
BL7.4 T·m +26%, better
Xmax5 mm –
Sensitivity88.6 dB +2.9, better
SB AcousticsSB17MFC35-8
£54.89 · 62% less, betterFs33 Hz +32%, worse
Qts0.37 –
Vas39 L −43%, better
BL5.9 T·m –
Xmax5.5 mm +10%, better
Sensitivity87.5 dB +1.8
SB AcousticsSB17NRX2C35-8
£55.41 · 62% less, betterFs37 Hz +46%, worse
Qts0.42 +11%, worse
Vas27 L −61%, better
BL6.3 T·m +6%
Xmax5.5 mm +10%, better
Sensitivity86.5 dB +0.8
SB AcousticsSB17NRXC35-8
£58.60 · 60% less, betterFs32 Hz +28%, worse
Qts0.34 −11%, better
Vas44.5 L −35%, better
BL5.9 T·m –
Xmax5.5 mm +10%, better
Sensitivity88.1 dB +2.4, better
SB AcousticsSB17NBAC35-8
£65.93 · 55% less, betterFs32 Hz +26%, worse
Qts0.35 −8%
Vas45 L −35%, better
BL5.9 T·m –
Xmax5.5 mm +10%, better
Sensitivity87.7 dB +2, better
Dayton AudioRS225P-4A
£67.31 · 54% less, betterFs38 Hz +51%, worse
Qts0.38 –
Vas45.8 L −34%, better
BL6.4 T·m +8%
Xmax6 mm +20%, better
Sensitivity89.1 dB +3.4, better
SB AcousticsSB17NAC35-8
£70.75 · 51% less, betterFs32 Hz +26%, worse
Qts0.42 +11%, worse
Vas33 L −52%, better
BL6.2 T·m +5%
Xmax5.5 mm +10%, better
Sensitivity85.6 dB –
SB AcousticsSB17CRC35-8
£85.53 · 41% less, betterFs28 Hz +12%, worse
Qts0.34 −11%, better
Vas48 L −30%, better
BL6 T·m –
Xmax5.5 mm +10%, better
Sensitivity86.6 dB +0.9
SB AcousticsSB17CAC35-8
£87.88 · 40% less, betterFs28 Hz +12%, worse
Qts0.36 −5%
Vas42 L −39%, better
BL6.2 T·m +5%
Xmax5.5 mm +10%, better
Sensitivity85.7 dB –
MonacorSPH-220HQ
£104.66 · 28% less, betterFs30 Hz +20%, worse
Qts0.40 +5%
Vas80 L +16%, worse
BL7.6 T·m +29%, better
Xmax5.5 mm +10%, better
Sensitivity88.7 dB +3, better
Scanspeak15W/8534T00
£154.86 · 7% more, worseFs32 Hz +28%, worse
Qts0.39 –
Vas30 L −56%, better
BL5.5 T·m −7%
Xmax5 mm –
Sensitivity85.6 dB –
Dayton AudioPS220-8
£200.12 · 38% more, worseFs46 Hz +86%, worse
Qts0.38 –
Vas90.2 L +31%, worse
BL6.2 T·m +4%
Xmax4.8 mm −4%
Sensitivity95.6 dB +9.9, better
£376.75 · 159% more, worse
Fs34 Hz +36%, worse
Qts0.42 +11%, worse
Vas30 L −56%, better
BL6.6 T·m +12%, better
Xmax5 mm –
Sensitivity85.8 dB –
AccutonC220-6-221
£491.94 · 239% more, worseFs26 Hz +5%
Qts0.40 +5%
Vas86.2 L +25%, worse
BL8.7 T·m +47%, better
Xmax5 mm –
Sensitivity87.8 dB +2.1, better
SB AcousticsMW16PF-8
No current priceFs29 Hz +16%, worse
Qts0.38 –
Vas48.4 L −30%, better
BL5.8 T·m –
Xmax5.5 mm +10%, better
Sensitivity86.5 dB +0.8
Dayton AudioPM220-8
No current priceFs49 Hz +96%, worse
Qts0.38 –
Vas63 L −9%
BL7.2 T·m +22%, better
Xmax4.6 mm −8%
Sensitivity94.6 dB +8.9, better
HiViS8-98R
No current priceFs33 Hz +32%, worse
Qts0.42 +11%, worse
Vas65.2 L −5%
BL6.9 T·m +17%, better
Xmax6 mm +20%, better
Sensitivity89 dB +3.3, better
MarkaudioMA200-P MICA
No current priceFs39 Hz +56%, worse
Qts0.37 –
Vas66.5 L −3%
BL7.0 T·m +19%, better
Xmax7 mm +40%, better
Sensitivity91.5 dB +5.8, better
HiViBG8N
No current priceFs37 Hz +48%, worse
Qts0.36 −5%
Vas46.1 L −33%, better
BL10.1 T·m +71%, better
Xmax5 mm –
Sensitivity89.2 dB +3.5, better
Supravox165 GMF
No current priceFs70 Hz +180%, worse
Qts0.39 –
Vas40 L −42%, better
BL5.6 T·m −5%
Xmax6 mm +20%, better
Sensitivity97.2 dB +11.5, better
HiViS8-98
No current priceFs34 Hz +36%, worse
Qts0.44 +16%, worse
Vas64.9 L −6%
BL6.6 T·m +12%, better
Xmax5.8 mm +16%, better
Sensitivity88.9 dB +3.2, better
HiViSS6.5
No current priceFs42 Hz +68%, worse
Qts0.39 –
Vas24.8 L −64%, better
BL6.4 T·m +8%
Xmax5.8 mm +16%, better
Sensitivity88.1 dB +2.4, better
HiViF8N
No current priceFs35 Hz +40%, worse
Qts0.39 –
Vas44.2 L −36%, better
BL10.1 T·m +71%, better
Xmax5 mm –
Sensitivity87.7 dB +2, better
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
- SoundImports4.8 out of 513 ratings · Checked 24 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 |
|---|---|---|---|---|
Hifi Collective | £145.25, the lowest price | 2 in stock | Visit shop at Hifi Collective | |
Falcon Acoustics | £171.54 | 18% above the lowest price | In stock | Visit shop at Falcon Acoustics |
Willys-Hifi | £172.31 | 19% above the lowest price | Stock not listed | Visit shop at Willys-Hifi |
Wilmslow Audio | £197.71 | 36% above the lowest price | Stock not listed | Visit shop at Wilmslow Audio |
SoundImports Import VAT and duty may apply | £154.86 | 6.6% above the lowest price | 36 in stock | Visit shop at SoundImports |
Best price over time
Tracked since 1 Apr
Recent changes
- 1 OctWillys-Hifi£176.95 → £172.31Down 2.6% from £176.95
- 30 SepWillys-Hifi£175.95 → £176.95Up 0.6% from £175.95
- 29 SepWillys-Hifi£176.95 → £175.95Down 0.6% from £176.95