SB AcousticsSB20PFCR30-4
£31.27 · 81% less, betterFs34 Hz +21%, worse
Qts0.33 −8%
Vas66.2 L +14%, worse
BL6.6 T·m –
Xmax5.8 mm −12%, worse
Sensitivity90.5 dB +3.3, better
7-inch LF driver · Revelator series · 38 mm voice coil · 60 W
Scanspeak 18W/8531G00 8Ω
8 Ω
- Fs
- 28Hz
- Xmax
- 6.5mm
- SPL
- 87dB
- Pe
- 60W
- BL
- 6.8T·m
- Vd
- 98cm³
- Qts
- 0.36
- Vas
- 58L
Scanspeak 18W/8531G00 is a 7-inch 8 ohm LF driver rated at 60 W RMS. The validated T/S data includes Fs 28 Hz, Qts 0.36, Vas 58.2 L, Xmax 6.5 mm, sensitivity 87.2 dB, plus 98 cm³ Vd and 72 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 £168.81.
The published T/S values agree with each other
Thiele/Small
- Fs
- 28Hz
- Qts
- 0.36
- Qes
- 0.39
- Qms
- 5.1
- Vas
- 58.2L
- Re
- 5.8Ω
- Le
- 0.35mH
Motor and cone
- BL
- 6.8T·m
- Sd
- 150cm²
- Mms
- 18g
- Xmax
- 6.5mm
- Vd †
- 98cm³
- Voice coil
- 38mm
Power and response
- Sensitivity †
- 87.2dB
- Manufacturer sensitivity
- 87dB
- Power
- 60W
- Impedance
- 8Ω
- Min. impedance
- 6.4Ω
- EBP †
- 72 · Sealed or vented
Size and mounting
- Diameter
- 180mm
Other published values
- Cms
- 1.85mm/N
- Rms
- 0.60kg/s
- Xmech
- 11
- Power Peak
- 70
† Calculated by bits from the published values
What this validation status means
Everything else Scanspeak lists
LF · Primary · 7″
- BL
- 6.8T·m
- Fs
- 28Hz
- Le
- 0.35mH
- Re
- 5.8Ω
- Sd
- 150cm²
- Cms
- 1.85mm/N
- Mms
- 18g
- Qes
- 0.39
- Qms
- 5.1
- Qts
- 0.36
- Rms
- 0.60kg/s
- SPL
- 87.2dB
- Vas
- 58.2L
- Xmax
- 6.5mm
- Xmech
- 11
- Power
- 60W
- Impedance
- 8Ω
- Power Peak
- 70
- Sensitivity
- 87dB
- Calculated sensitivity †
- 87.2dB
- Manufacturer sensitivity
- 87dB
- Min. impedance
- 6.4Ω
- Voice coil
- 38mm
- Diameter
- 180mm
02
Compare
Same-size drivers, compared with the 18W/8531G00. Clear differences are green when better and red when worse.
This driver18W/8531G00
Best price
£168.81
Fs
28 Hz
Qts
0.36
Vas
58.2 L
BL
6.8 T·m
Xmax
6.5 mm
Sensitivity
87.2 dB
Power
60 W
SB AcousticsSB20PFCR30-8
£33.07 · 80% less, betterFs34 Hz +21%, worse
Qts0.37 –
Vas66.2 L +14%, worse
BL7.7 T·m +13%, better
Xmax5.8 mm −12%, worse
Sensitivity89.8 dB +2.6, better
SB AcousticsSB20PFC30-4
£35.17 · 79% less, betterFs34 Hz +20%, worse
Qts0.33 −8%
Vas66.2 L +14%, worse
BL6.6 T·m –
Xmax5.8 mm −12%, worse
Sensitivity90.4 dB +3.2, better
SB AcousticsSB20PFC30-8
£35.17 · 79% less, betterFs34 Hz +21%, worse
Qts0.37 –
Vas66.2 L +14%, worse
BL7.7 T·m +13%, better
Xmax5.7 mm −13%, worse
Sensitivity89.8 dB +2.6, better
SB AcousticsSB17MFC35-8
£54.89 · 67% less, betterFs33 Hz +18%, worse
Qts0.37 –
Vas39 L −33%, better
BL5.9 T·m −13%, worse
Xmax5.5 mm −15%, worse
Sensitivity87.5 dB –
HiViC8
£61.33 · 64% less, betterFs35 Hz +25%, worse
Qts0.36 –
Vas56.1 L −4%
BL9.8 T·m +44%, better
Xmax5.9 mm −9%
Sensitivity89.6 dB +2.4, better
SB AcousticsSB17NBAC35-8
£65.93 · 61% less, betterFs32 Hz +13%, worse
Qts0.35 –
Vas45 L −23%, better
BL5.9 T·m −13%, worse
Xmax5.5 mm −15%, worse
Sensitivity87.7 dB +0.5
Dayton AudioRS225P-4A
£67.31 · 60% less, betterFs38 Hz +35%, worse
Qts0.38 +6%
Vas45.8 L −21%, better
BL6.4 T·m −6%
Xmax6 mm −8%
Sensitivity89.1 dB +1.9
SB AcousticsSB17CRC35-8
£85.53 · 49% less, betterFs28 Hz –
Qts0.34 −6%
Vas48 L −18%, better
BL6 T·m −12%, worse
Xmax5.5 mm −15%, worse
Sensitivity86.6 dB −0.6
SB AcousticsSB17CAC35-8
£87.88 · 48% less, betterFs28 Hz –
Qts0.36 –
Vas42 L −28%, better
BL6.2 T·m −9%
Xmax5.5 mm −15%, worse
Sensitivity85.7 dB −1.5
SEASH1456-08 ER18RNX
£109.29 · 35% less, betterFs37 Hz +32%, worse
Qts0.32 −11%, better
Vas32 L −45%, better
BL7.2 T·m +6%
Xmax6 mm −8%
Sensitivity88.2 dB +1
SB AcousticsMW16P-8
£145.30 · 14% less, betterFs29 Hz +4%
Qts0.33 −8%
Vas48 L −18%, better
BL6.3 T·m −7%
Xmax6 mm −8%
Sensitivity87.3 dB –
SB AcousticsMW16P-12
£146.49 · 13% less, betterFs31 Hz +9%
Qts0.37 –
Vas47.3 L −19%, better
BL7.4 T·m +9%
Xmax6.2 mm −5%
Sensitivity87.3 dB –
SB AcousticsMW16PNW-8
£146.49 · 13% less, betterFs29 Hz +4%
Qts0.32 −11%, better
Vas49.9 L −14%, better
BL6.3 T·m −7%
Xmax6 mm −8%
Sensitivity87.6 dB –
Scanspeak15W/8531K00
£150.70 · 11% less, betterFs39 Hz +39%, worse
Qts0.38 +6%
Vas16.7 L −71%, better
BL6.6 T·m –
Xmax6.5 mm –
Sensitivity85.8 dB −1.4
Scanspeak18W/8542-10
£157.04 · 7% less, betterFs43 Hz +54%, worse
Qts0.35 –
Vas26 L −55%, better
BL6.9 T·m –
Xmax6.5 mm –
Sensitivity88.7 dB +1.5
Scanspeak18W/4531G01
£168.82 · Same priceFs34 Hz +21%, worse
Qts0.35 –
Vas45.6 L −22%, better
BL5.7 T·m −16%, worse
Xmax6.5 mm –
Sensitivity88.8 dB +1.6
Scanspeak18W/4531G00
£179.98 · 7% more, worseFs33 Hz +18%, worse
Qts0.35 –
Vas41.9 L −28%, better
BL5.7 T·m −16%, worse
Xmax6.5 mm –
Sensitivity88 dB +0.8
WavecorWF223BD01
£205.39 · 22% more, worseFs33 Hz +16%, worse
Qts0.39 +8%
Vas45 L −23%, better
BL7.7 T·m +13%, better
Xmax6.5 mm –
Sensitivity87.9 dB +0.7
SB AcousticsMW16TX-8
£250.36 · 48% more, worseFs29 Hz +5%
Qts0.33 −8%
Vas48 L −18%, better
BL6.3 T·m −7%
Xmax6 mm −8%
Sensitivity87.4 dB –
SB AcousticsMW19TX-8
£283.85 · 68% more, worseFs33 Hz +18%, worse
Qts0.33 −8%
Vas53.4 L −8%
BL7.5 T·m +10%, better
Xmax6.7 mm +3%
Sensitivity89.4 dB +2.2, better
SB AcousticsMW19PF-8
No current priceFs30 Hz +7%
Qts0.34 −6%
Vas63 L +8%
BL7 T·m –
Xmax6.5 mm –
Sensitivity88.7 dB +1.5
Audio Technology6 H 52 17 06 SD
No current priceFs33 Hz +18%, worse
Qts0.35 –
Vas47 L −19%, better
BL6.6 T·m –
Xmax6.3 mm −3%
Sensitivity88.1 dB +0.9
RS SpeakersW 220.50 FIBONACCI
No current priceFs33 Hz +19%, worse
Qts0.36 –
Vas55.6 L −4%
BL8.6 T·m +26%, better
Xmax6 mm −8%
Sensitivity89.3 dB +2.1, better
MarkaudioMA200-P MICA
No current priceFs39 Hz +39%, worse
Qts0.37 +4%
Vas66.5 L +14%, worse
BL7.0 T·m +3%
Xmax7 mm +8%
Sensitivity91.5 dB +4.3, better
HiViSS8
No current priceFs30 Hz +7%
Qts0.33 −8%
Vas83.3 L +43%, worse
BL6.8 T·m –
Xmax6 mm −8%
Sensitivity89.6 dB +2.4, better
WavecorWF223BD02
No current priceFs31 Hz +11%, worse
Qts0.37 –
Vas49.5 L −15%, better
BL9.5 T·m +40%, better
Xmax6.5 mm –
Sensitivity87.9 dB +0.7
HiViSS8R
No current priceFs30 Hz +7%
Qts0.35 –
Vas92.9 L +60%, worse
BL6.6 T·m –
Xmax6 mm −8%
Sensitivity90 dB +2.8, better
CIARECW202
No current priceFs40 Hz +43%, worse
Qts0.41 +14%, worse
Vas48 L −18%, better
BL6.5 T·m −4%
Xmax6.5 mm –
Sensitivity90.1 dB +2.9, better
No current price
Fs35 Hz +25%, worse
Qts0.34 −6%
Vas31 L −47%, better
BL7.4 T·m +9%
Xmax7 mm +8%
Sensitivity87.5 dB –
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 512 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 |
|---|---|---|---|---|
Hifi Collective | £168.81, the lowest price | 2 in stock | Visit shop at Hifi Collective | |
Falcon Acoustics | £192.00 | 14% above the lowest price | In stock | Visit shop at Falcon Acoustics |
Willys-Hifi | £207.58 | 23% above the lowest price | Stock not listed | Visit shop at Willys-Hifi |
SoundImports Import VAT and duty may apply | £179.98 | 6.6% above the lowest price | 18 in stock | Visit shop at SoundImports |
Lautsprechershop Import VAT and duty may apply | £183.12 | 8.5% above the lowest price | Special order | Visit shop at Lautsprechershop |
Best price over time
Tracked since 1 Apr
Recent changes
- 1 OctWillys-Hifi£212.95 → £207.58Down 2.5% from £212.95
- 30 SepWillys-Hifi£211.95 → £212.95Up 0.5% from £211.95
- 29 SepWillys-Hifi£212.95 → £211.95Down 0.5% from £212.95