SB AcousticsSB16PFCR25-4
£21.76 · 93% less, betterFs35 Hz –
Qts0.34 −6%
Vas32.7 L −15%, better
BL5 T·m −15%, worse
Xmax4.5 mm −50%, worse
Sensitivity87.6 dB –
7-inch LF driver · Illuminator series · 42 mm voice coil · 70 W
Scanspeak 18WU/4741T00 4Ω
4 Ω
- Fs
- 34Hz
- Xmax
- 9mm
- SPL
- 88dB
- Pe
- 70W
- BL
- 5.9T·m
- Vd
- 139cm³
- Qts
- 0.36
- Vas
- 38L
Scanspeak 18WU/4741T00 is a 7-inch 4 ohm LF driver rated at 70 W RMS. The validated T/S data includes Fs 34 Hz, Qts 0.36, Vas 38.4 L, Xmax 9 mm, sensitivity 87.9 dB, plus 139 cm³ Vd and 87 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 £304.20.
The published T/S values agree with each other
Thiele/Small
- Fs
- 34Hz
- Qts
- 0.36
- Qes
- 0.39
- Qms
- 3.8
- Vas
- 38.4L
- Re
- 3.3Ω
- Le
- 0.40mH
Motor and cone
- BL
- 5.9T·m
- Sd
- 154cm²
- Mms
- 19g
- Xmax
- 9mm
- Vd †
- 139cm³
- Voice coil
- 42mm
Power and response
- Sensitivity †
- 87.9dB
- Manufacturer sensitivity
- 87.5dB
- Power
- 70W
- Impedance
- 4Ω
- Min. impedance
- 4.6Ω
- EBP †
- 87 · Sealed or vented
Size and mounting
- Diameter
- 180mm
Other published values
- Cms
- 1.20mm/N
- Rms
- 1.10kg/s
- Xmech
- 16
- Power Peak
- 150
† Calculated by bits from the published values
What this validation status means
Everything else Scanspeak lists
LF · Primary · 7″
- BL
- 5.9T·m
- Fs
- 34Hz
- Le
- 0.40mH
- Re
- 3.3Ω
- Sd
- 154cm²
- Cms
- 1.20mm/N
- Mms
- 19g
- Qes
- 0.39
- Qms
- 3.8
- Qts
- 0.36
- Rms
- 1.10kg/s
- SPL
- 87.9dB
- Vas
- 38.4L
- Xmax
- 9mm
- Xmech
- 16
- Power
- 70W
- Impedance
- 4Ω
- Power Peak
- 150
- Sensitivity
- 87.5dB
- Calculated sensitivity †
- 87.9dB
- Manufacturer sensitivity
- 87.5dB
- Min. impedance
- 4.6Ω
- Voice coil
- 42mm
- Diameter
- 180mm
02
Compare
Same-size drivers, compared with the 18WU/4741T00. Clear differences are green when better and red when worse.
This driver18WU/4741T00
Best price
£304.20
Fs
34 Hz
Qts
0.36
Vas
38.4 L
BL
5.9 T·m
Xmax
9 mm
Sensitivity
87.9 dB
Power
70 W
SB AcousticsSB16PFC25-4
£23.44 · 92% less, betterFs35 Hz –
Qts0.34 −6%
Vas32.7 L −15%, better
BL5 T·m −15%, worse
Xmax4.5 mm −50%, worse
Sensitivity87.6 dB –
SB AcousticsSB17MFC35-8
£54.89 · 82% less, betterFs33 Hz –
Qts0.37 –
Vas39 L –
BL5.9 T·m –
Xmax5.5 mm −39%, worse
Sensitivity87.5 dB –
SB AcousticsSB17NRXC35-8
£58.60 · 81% less, betterFs32 Hz −6%
Qts0.34 −6%
Vas44.5 L +16%, worse
BL5.9 T·m –
Xmax5.5 mm −39%, worse
Sensitivity88.1 dB –
SB AcousticsSB17NBAC35-8
£65.93 · 78% less, betterFs32 Hz −7%
Qts0.35 –
Vas45 L +17%, worse
BL5.9 T·m –
Xmax5.5 mm −39%, worse
Sensitivity87.7 dB –
CIAREHWB160
£66.98 · 78% less, betterFs46 Hz +35%, worse
Qts0.36 –
Vas19.5 L −49%, better
BL6.5 T·m +10%, better
Xmax4.5 mm −50%, worse
Sensitivity89 dB +1.1
Scanspeak18W/4434G00
£72.01 · 76% less, betterFs47 Hz +38%, worse
Qts0.35 –
Vas20.7 L −46%, better
BL6 T·m –
Xmax4.3 mm −52%, worse
Sensitivity89.7 dB +1.8
Dayton AudioDCS205-4
£75.27 · 75% less, betterFs32 Hz −5%
Qts0.37 –
Vas27 L −30%, better
BL10.7 T·m +81%, better
Xmax8.8 mm –
Sensitivity85.6 dB −2.3, worse
SB AcousticsSB17CRC35-8
£85.53 · 72% less, betterFs28 Hz −18%, better
Qts0.34 −6%
Vas48 L +25%, worse
BL6 T·m –
Xmax5.5 mm −39%, worse
Sensitivity86.6 dB −1.3
SB AcousticsSB17CAC35-8
£87.88 · 71% less, betterFs28 Hz −18%, better
Qts0.36 –
Vas42 L +9%
BL6.2 T·m +5%
Xmax5.5 mm −39%, worse
Sensitivity85.7 dB −2.2, worse
CIAREHWG160
£102.15 · 66% less, betterFs39 Hz +15%, worse
Qts0.33 −8%
Vas27 L −30%, better
BL5.6 T·m −5%
Xmax6.5 mm −28%, worse
Sensitivity88.6 dB +0.7
WavecorWF182BD17
£121.93 · 60% less, betterFs33 Hz –
Qts0.35 –
Vas24.3 L −37%, better
BL6.5 T·m +10%, better
Xmax5.5 mm −39%, worse
Sensitivity85.8 dB −2.1, worse
£152.39 · 50% less, better
Fs42 Hz +24%, worse
Qts0.39 +8%
Vas31 L −19%, better
BL6.6 T·m +12%, better
Xmax3 mm −67%, worse
Sensitivity89.4 dB +1.5
Scanspeak15W/8534T00
£154.86 · 49% less, betterFs32 Hz −6%
Qts0.39 +8%
Vas30 L −22%, better
BL5.5 T·m −7%
Xmax5 mm −44%, worse
Sensitivity85.6 dB −2.3, worse
Scanspeak18W/4531G01
£168.82 · 45% less, betterFs34 Hz –
Qts0.35 –
Vas45.6 L +19%, worse
BL5.7 T·m −3%
Xmax6.5 mm −28%, worse
Sensitivity88.8 dB +0.9
Scanspeak18W/4531G00
£179.98 · 41% less, betterFs33 Hz –
Qts0.35 –
Vas41.9 L +9%
BL5.7 T·m −3%
Xmax6.5 mm −28%, worse
Sensitivity88 dB –
Beyma8NMFW
£228.68 · 25% less, betterFs37 Hz +9%
Qts0.34 −6%
Vas27 L −30%, better
BL13.4 T·m +127%, better
Xmax9 mm –
Sensitivity87.8 dB –
Scanspeak18WU/8747T00
£284.64 · 6% less, betterFs36 Hz +6%
Qts0.38 +6%
Vas36.2 L −6%
BL7.4 T·m +25%, better
Xmax9 mm –
Sensitivity88 dB –
Scanspeak18WU/4747T00
£288.83 · 5% less, betterFs36 Hz +6%
Qts0.35 –
Vas36 L −6%
BL5.9 T·m –
Xmax9 mm –
Sensitivity88.4 dB +0.5
Scanspeak18WU/8741T00
£300.68 · 1% lessFs35 Hz –
Qts0.39 +8%
Vas37.1 L −3%
BL7.3 T·m +24%, better
Xmax9 mm –
Sensitivity87.6 dB –
PurifiPTT8.0X04-NAB-01
£586.08 · 93% more, worseFs26 Hz −24%, better
Qts0.36 –
Vas70.4 L +83%, worse
BL8 T·m +36%, better
Xmax9.3 mm +3%
Sensitivity87.2 dB −0.7
AccutonAS168-9-470
£677.38 · 123% more, worseFs27 Hz −21%, better
Qts0.35 –
Vas35.5 L −8%
BL12.1 T·m +105%, better
Xmax8 mm −11%, worse
Sensitivity84.7 dB −3.2, worse
Supravox165 GMF
No current priceFs70 Hz +106%, worse
Qts0.39 +8%
Vas40 L +4%
BL5.6 T·m −5%
Xmax6 mm −33%, worse
Sensitivity97.2 dB +9.3, better
SB AcousticsSB17BAC35-8-COAX
No current priceFs35 Hz +4%
Qts0.33 −8%
Vas33.1 L −14%, better
BL5.7 T·m −3%
Xmax3.1 mm −66%, worse
Sensitivity88.1 dB –
SB AcousticsMW16PF-8
No current priceFs29 Hz −15%, better
Qts0.38 +6%
Vas48.4 L +26%, worse
BL5.8 T·m –
Xmax5.5 mm −39%, worse
Sensitivity86.5 dB −1.4
KartesianWOM155_VKI-C
No current priceFs38 Hz +12%, worse
Qts0.37 –
Vas17.9 L −53%, better
BL7.1 T·m +20%, better
Xmax10 mm +11%, better
Sensitivity86 dB −1.9
Audio Technology6 H 52 17 06 SD
No current priceFs33 Hz –
Qts0.35 –
Vas47 L +22%, worse
BL6.6 T·m +12%, better
Xmax6.3 mm −30%, worse
Sensitivity88.1 dB –
No current price
Fs35 Hz –
Qts0.34 −6%
Vas31 L −19%, better
BL7.4 T·m +25%, better
Xmax7 mm −22%, worse
Sensitivity87.5 dB –
Audio Technology6 A 77 20 06 SD
No current priceFs34 Hz –
Qts0.32 −11%, better
Vas44 L +15%, worse
BL8 T·m +36%, better
Xmax8 mm −11%, worse
Sensitivity88.6 dB +0.7
WavecorWF182BD09
No current priceFs33 Hz –
Qts0.35 –
Vas24.3 L −37%, better
BL6.5 T·m +10%, better
Xmax5.5 mm −39%, worse
Sensitivity85.8 dB −2.1, worse
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 51 rating · 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 | £304.20, the lowest price | In stock | Visit shop at Falcon Acoustics | |
Willys-Hifi | £339.84 | 12% above the lowest price | Stock not listed | Visit shop at Willys-Hifi |
Wilmslow Audio | £374.99 | 23% above the lowest price | Stock not listed | Visit shop at Wilmslow Audio |
Lautsprechershop Import VAT and duty may apply | £300.68 | Special order | Visit shop at Lautsprechershop | |
SoundImports Import VAT and duty may apply | £309.76 | 1.8% above the lowest price | 16 in stock | Visit shop at SoundImports |
Hifisound Import VAT and duty may apply · under 7 working days | £318.76 | 4.8% above the lowest price | Back order (under 7 working days) | Visit shop at Hifisound |
Best price over time
Tracked since 1 Apr
Recent changes
- 1 OctWillys-Hifi£348.95 → £339.84Down 2.6% from £348.95
- 30 SepWillys-Hifi£346.95 → £348.95Up 0.6% from £346.95
- 29 SepWillys-Hifi£347.95 → £346.95Down 0.3% from £347.95