SB AcousticsSB17MFC35-4
£54.89 · 62% less, betterFs30 Hz +7%
Qts0.28 –
Vas45 L −3%
BL4.9 T·m −40%, worse
Xmax5.5 mm −15%, worse
Sensitivity88.1 dB +0.8
7-inch LF driver · Classic series · 42 mm voice coil · 100 W
Scanspeak 18W/8545K00 8Ω
8 Ω
- Fs
- 28Hz
- Xmax
- 6.5mm
- SPL
- 87dB
- Pe
- 100W
- BL
- 8.2T·m
- Vd
- 94cm³
- Qts
- 0.28
- Vas
- 46L
Scanspeak 18W/8545K00 is a 7-inch 8 ohm LF driver rated at 100 W RMS. The validated T/S data includes Fs 28 Hz, Qts 0.28, Vas 46.4 L, Xmax 6.5 mm, sensitivity 87.3 dB, plus 94 cm³ Vd and 93 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 £144.00.
The published T/S values agree with each other
Thiele/Small
- Fs
- 28Hz
- Qts
- 0.28
- Qes
- 0.30
- Qms
- 5.2
- Vas
- 46.4L
- Re
- 5.5Ω
- Le
- 0.40mH
Motor and cone
- BL
- 8.2T·m
- Sd
- 145cm²
- Mms
- 21g
- Xmax
- 6.5mm
- Vd †
- 94cm³
- Voice coil
- 42mm
Power and response
- Sensitivity †
- 87.3dB
- Manufacturer sensitivity
- 87.5dB
- Power
- 100W
- Impedance
- 8Ω
- Min. impedance
- 6.6Ω
- EBP †
- 93 · Sealed or vented
Size and mounting
- Diameter
- 180mm
Other published values
- Cms
- 1.58mm/N
- Rms
- 0.69kg/s
- Xmech
- 10
- Power Peak
- 170
† Calculated by bits from the published values
What this validation status means
Everything else Scanspeak lists
LF · Primary · 7″
- BL
- 8.2T·m
- Fs
- 28Hz
- Le
- 0.40mH
- Re
- 5.5Ω
- Sd
- 145cm²
- Cms
- 1.58mm/N
- Mms
- 21g
- Qes
- 0.30
- Qms
- 5.2
- Qts
- 0.28
- Rms
- 0.69kg/s
- SPL
- 87.3dB
- Vas
- 46.4L
- Xmax
- 6.5mm
- Xmech
- 10
- Power
- 100W
- Impedance
- 8Ω
- Power Peak
- 170
- Sensitivity
- 87.5dB
- Calculated sensitivity †
- 87.3dB
- Manufacturer sensitivity
- 87.5dB
- Min. impedance
- 6.6Ω
- Voice coil
- 42mm
- Diameter
- 180mm
02
Compare
Same-size drivers, compared with the 18W/8545K00. Clear differences are green when better and red when worse.
This driver18W/8545K00
Best price
£144.00
Fs
28 Hz
Qts
0.28
Vas
46.4 L
BL
8.2 T·m
Xmax
6.5 mm
Sensitivity
87.3 dB
Power
100 W
SB AcousticsSB17NRX2L35-8
£71.13 · 51% less, betterFs38 Hz +35%, worse
Qts0.28 –
Vas26.1 L −44%, better
BL7.8 T·m −4%
Xmax4.8 mm −26%, worse
Sensitivity88.7 dB +1.4
CIAREHWG160
£102.15 · 29% less, betterFs39 Hz +39%, worse
Qts0.27 −4%
Vas27 L −42%, better
BL8.9 T·m +9%
Xmax6.5 mm –
Sensitivity89.6 dB +2.3, better
Eighteen Sound8NMB420
£120.21 · 17% less, betterFs61 Hz +118%, worse
Qts0.28 –
Vas33 L −29%, better
BL10 T·m +22%, better
Xmax5.8 mm −11%, worse
Sensitivity95.9 dB +8.6, better
SB AcousticsMW16P-4
£146.49 · 2% moreFs28 Hz –
Qts0.27 −4%
Vas50.2 L +8%
BL5.2 T·m −37%, worse
Xmax6 mm −8%
Sensitivity88 dB +0.7
SB AcousticsMW16PNW-4
£148.32 · 3% moreFs28 Hz –
Qts0.27 −4%
Vas51.8 L +12%, worse
BL5 T·m −39%, worse
Xmax6 mm −8%
Sensitivity88 dB +0.7
SB AcousticsMW19P-8
£167.42 · 16% more, worseFs30 Hz +5%
Qts0.29 +4%
Vas61 L +31%, worse
BL7.7 T·m −6%
Xmax6.7 mm +3%
Sensitivity88.9 dB +1.6
SB AcousticsMW19PNW-8
£170.81 · 19% more, worseFs30 Hz +5%
Qts0.29 +4%
Vas61 L +31%, worse
BL7.7 T·m −6%
Xmax6.7 mm +3%
Sensitivity88.9 dB +1.6
VoltBM165.1
£172.80 · 20% more, worseFs30 Hz +7%
Qts0.24 −14%, better
Vas40.8 L −12%, better
BL9.8 T·m +20%, better
Xmax6.3 mm −3%
Sensitivity88.3 dB +1
WavecorWF182BD08
£190.66 · 32% more, worseFs33 Hz +19%, worse
Qts0.29 +4%
Vas32.4 L −30%, better
BL8.5 T·m +4%
Xmax5.5 mm −15%, worse
Sensitivity88.1 dB +0.8
Scanspeak21W/8555-10
£217.66 · 51% more, worseFs20 Hz −29%, better
Qts0.31 +11%, worse
Vas134 L +189%, worse
BL8.2 T·m –
Xmax6.5 mm –
Sensitivity87.1 dB –
SB AcousticsMW16TX-4
£250.36 · 74% more, worseFs29 Hz +4%
Qts0.27 −4%
Vas48 L +3%
BL5.2 T·m −37%, worse
Xmax6 mm −8%
Sensitivity88.1 dB +0.8
SB AcousticsMW19TX-4
£283.85 · 97% more, worseFs32 Hz +14%, worse
Qts0.27 −4%
Vas53.2 L +15%, worse
BL6.3 T·m −23%, worse
Xmax6.8 mm +5%
Sensitivity90 dB +2.7, better
SB AcousticsMW19TX-8
£283.85 · 97% more, worseFs33 Hz +18%, worse
Qts0.33 +18%, worse
Vas53.4 L +15%, worse
BL7.5 T·m −9%
Xmax6.7 mm +3%
Sensitivity89.4 dB +2.1, better
AccutonC158-6-851
£293.02 · 103% more, worseFs31 Hz +11%, worse
Qts0.28 –
Vas25.7 L −45%, better
BL8.7 T·m +6%
Xmax5 mm −23%, worse
Sensitivity86.2 dB −1.1
£373.14 · 159% more, worse
Fs34 Hz +21%, worse
Qts0.26 −7%
Vas30 L −35%, better
BL8.4 T·m –
Xmax5 mm −23%, worse
Sensitivity88 dB +0.7
£410.34 · 185% more, worse
Fs21 Hz −25%, better
Qts0.29 +4%
Vas164 L +253%, worse
BL8 T·m –
Xmax7 mm +8%
Sensitivity88.9 dB +1.6
Scanspeak21WE/4542T00
£669.81 · 365% more, worseFs38 Hz +36%, worse
Qts0.28 –
Vas54 L +16%, worse
BL8.2 T·m –
Xmax7.2 mm +11%, better
Sensitivity92 dB +4.7, better
No photo
PHL Audio1362
No current priceFs39 Hz +39%, worse
Qts0.28 –
Vas34.8 L −25%, better
BL8.1 T·m –
Xmax5 mm −23%, worse
Sensitivity90.4 dB +3.1, better
No photo
PHL Audio1362NDU
No current priceFs39 Hz +39%, worse
Qts0.28 –
Vas34.8 L −25%, better
BL8.1 T·m –
Xmax5 mm −23%, worse
Sensitivity90.4 dB +3.1, better
Audio Technology18 H 52 17 06 SD
No current priceFs36 Hz +29%, worse
Qts0.28 –
Vas34 L −27%, better
BL6.6 T·m −20%, worse
Xmax6.3 mm −3%
Sensitivity88.8 dB +1.5
No photo
PHL Audio1343
No current priceFs40 Hz +43%, worse
Qts0.28 –
Vas29.9 L −36%, better
BL8.1 T·m –
Xmax5 mm −23%, worse
Sensitivity90.2 dB +2.9, better
No photo
PHL Audio1343NDU
No current priceFs40 Hz +43%, worse
Qts0.28 –
Vas29.9 L −36%, better
BL8.1 T·m –
Xmax5 mm −23%, worse
Sensitivity90.2 dB +2.9, better
PurifiPTT6.5W04-NFA-06
No current priceFs32 Hz +14%, worse
Qts0.26 −7%
Vas28.3 L −39%, better
BL7.6 T·m −7%
Xmax5.9 mm −9%
Sensitivity87.2 dB –
SB AcousticsMW19PF-4
No current priceFs29 Hz +4%
Qts0.27 −4%
Vas62.7 L +35%, worse
BL6.1 T·m −26%, worse
Xmax6.5 mm –
Sensitivity89.4 dB +2.1, better
PurifiPTT6.5W04-NAA-08
No current priceFs33 Hz +18%, worse
Qts0.30 +7%
Vas23.3 L −50%, better
BL7.7 T·m −6%
Xmax5.9 mm −9%
Sensitivity86.3 dB −1
VoltBM165.4
No current priceFs32 Hz +14%, worse
Qts0.30 +7%
Vas32.3 L −30%, better
BL9.6 T·m +17%, better
Xmax6 mm −8%
Sensitivity87.2 dB –
CIAREHWB205
No current priceFs28 Hz –
Qts0.29 +4%
Vas79 L +70%, worse
BL9.3 T·m +13%, better
Xmax7 mm +8%
Sensitivity89.6 dB +2.3, better
HiViSS8IIR
No current priceFs33 Hz +18%, worse
Qts0.28 –
Vas59.6 L +28%, worse
BL9.2 T·m +12%, better
Xmax4.8 mm −26%, worse
Sensitivity90.7 dB +3.4, better
Dayton AudioPM180-8
No current priceFs53 Hz +90%, worse
Qts0.28 –
Vas28 L −40%, better
BL7.7 T·m −6%
Xmax4.6 mm −29%, worse
Sensitivity93.5 dB +6.2, better
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
- SoundImports4.5 out of 57 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 |
|---|---|---|---|---|
Hifi Collective | £144.00, the lowest price | 4 in stock | Visit shop at Hifi Collective | |
Falcon Acoustics | £167.52 | 16% above the lowest price | In stock | Visit shop at Falcon Acoustics |
Willys-Hifi | £179.02 | 24% above the lowest price | Stock not listed | Visit shop at Willys-Hifi |
Lautsprechershop Import VAT and duty may apply | £147.16 | 2.2% above the lowest price | Special order | Visit shop at Lautsprechershop |
SoundImports Import VAT and duty may apply | £159.05 | 10% above the lowest price | 3 in stock | Visit shop at SoundImports |
Best price over time
Tracked since 1 Apr
Recent changes
- 1 OctWillys-Hifi£183.95 → £179.02Down 2.7% from £183.95
- 30 SepWillys-Hifi£182.95 → £183.95Up 0.5% from £182.95
- 16 SepWillys-Hifi£183.95 → £182.95Down 0.5% from £183.95