SB AcousticsSB16PFCR25-8
£24.36 · 27% less, betterFs38 Hz +6%
Qts0.40 –
Vas27 L −29%, better
BL6.2 T·m +41%, better
Xmax4.5 mm −55%, worse
Sensitivity86.9 dB −0.5
6.5-inch LF driver · W series · 25 mm voice coil · 50 W
Visaton W 170 S 4Ω
£62.34
SteadyImpact Audio · In stock · All 8 offers
- Fs
- 36Hz
- Xmax
- 10mm
- SPL
- 87dB
- Pe
- 50W
- BL
- 4.4T·m
- Vd
- 129cm³
- Qts
- 0.41
- Vas
- 38L
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
frequency response
Frequency response
240 plotted pointsSource file SHA-256 40dd20b09045…Medium confidence470 selected pixels of 1,382 - Trace datasheet-response-trace-poc/v1
impedance
Impedance response
240 plotted pointsSource file SHA-256 40dd20b09045…Medium confidence682 selected pixels of 682
Published graphs
Visaton W 170 S is a 6.5-inch 4 ohm LF driver rated at 50 W RMS. The validated T/S data includes Fs 36 Hz, Qts 0.41, Vas 38 L, Xmax 10 mm, sensitivity 87.4 dB, plus 129 cm³ Vd and 71 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 £33.59.
The published T/S values agree with each other
Thiele/Small
- Fs
- 36Hz
- Qts
- 0.41
- Qes
- 0.51
- Qms
- 2.2
- Vas
- 38L
- Re
- 3.2Ω
- Le
- 0.60mH
Motor and cone
- BL
- 4.4T·m
- Sd
- 129cm²
- Mms
- 12g
- Xmax
- 10mm
- Vd †
- 129cm³
- Voice coil
- 25mm
- Flux density
- 1T
Power and response
- Sensitivity †
- 87.4dB
- Manufacturer sensitivity
- 86dB
- Power
- 50W
- Impedance
- 4Ω
- High limit
- 8000Hz
- EBP †
- 71 · Sealed or vented
Size and mounting
- Diameter
- 170mm
- Cutout
- 148mm
- Weight
- 1.1kg
Other published values
- Power Peak
- 80
Sensitivity shows 87.4 dB, calculated from the T/S values. Visaton publishes 86.0 dB, 1.4 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else Visaton lists
LF · Primary · 6.5″
- BL
- 4.4T·m
- Fs
- 36Hz
- Le
- 0.60mH
- Re
- 3.2Ω
- Sd
- 129cm²
- Mms
- 12g
- Qes
- 0.51
- Qms
- 2.2
- Qts
- 0.41
- SPL
- 87.4dB
- Vas
- 38L
- Xmax
- 10mm
- Power
- 50W
- Impedance
- 4Ω
- Power Peak
- 80
- Flux density
- 1T
- Sensitivity
- 86dB
- Calculated sensitivity †
- 87.4dB
- High limit
- 8000Hz
- Manufacturer sensitivity
- 86dB
- Voice coil
- 25mm
- Weight
- 1.1kg
- Diameter
- 170mm
- Cutout
- 148mm
02
Compare
Same-size drivers, compared with the W 170 S. Clear differences are green when better and red when worse.
This driverW 170 S
Best price
£33.59
Fs
36 Hz
Qts
0.41
Vas
38 L
BL
4.4 T·m
Xmax
10 mm
Sensitivity
87.4 dB
Power
50 W
MonacorSP-167E
£26.22 · 22% less, betterFs62 Hz +72%, worse
Qts0.41 –
Vas17.9 L −53%, better
BL5.4 T·m +23%, better
Xmax2.5 mm −75%, worse
Sensitivity91.5 dB +4.1, better
SB AcousticsSB16PFC25-8
£27.17 · 19% less, betterFs38 Hz +6%
Qts0.40 –
Vas27 L −29%, better
BL6.2 T·m +41%, better
Xmax4.5 mm −55%, worse
Sensitivity86.9 dB −0.5
SB AcousticsSB16FRPC25-7
£30.63 · 9% less, betterFs44 Hz +22%, worse
Qts0.46 +12%, worse
Vas31 L −18%, better
BL5.4 T·m +23%, better
Xmax3.0 mm −70%, worse
Sensitivity89.4 dB +2, better
SB AcousticsSB17NRX2C35-4
£55.41 · 65% more, worseFs36 Hz –
Qts0.37 −10%
Vas27.6 L −27%, better
BL4.9 T·m +11%, better
Xmax5.5 mm −45%, worse
Sensitivity87 dB –
Dayton AudioRS180P-4
£59.92 · 78% more, worseFs38 Hz +5%
Qts0.39 −5%
Vas27.3 L −28%, better
BL4.7 T·m +6%
Xmax6 mm −40%, worse
Sensitivity86.9 dB −0.5
MonacorSPH-175HQ
£68.90 · 105% more, worseFs39 Hz +8%
Qts0.42 –
Vas33 L −13%, better
BL6.4 T·m +45%, better
Xmax5.5 mm −45%, worse
Sensitivity88 dB +0.6
SB AcousticsSB17NAC35-8
£71.00 · 111% more, worseFs32 Hz −13%, better
Qts0.42 –
Vas33 L −13%, better
BL6.2 T·m +41%, better
Xmax5.5 mm −45%, worse
Sensitivity85.6 dB −1.8
MonacorSPH-170
£80.67 · 140% more, worseFs38 Hz +6%
Qts0.44 +7%
Vas37 L –
BL5.9 T·m +34%, better
Xmax3 mm −70%, worse
Sensitivity87.7 dB –
WavecorWF168WA01
£97.05 · 189% more, worseFs48 Hz +32%, worse
Qts0.43 +5%
Vas24.6 L −35%, better
BL5.1 T·m +16%, better
Xmax3 mm −70%, worse
Sensitivity89.6 dB +2.2, better
WavecorWF168WA05
£102.60 · 205% more, worseFs40 Hz +11%, worse
Qts0.42 –
Vas27.7 L −27%, better
BL5 T·m +14%, better
Xmax3 mm −70%, worse
Sensitivity88 dB +0.6
MarkaudioALPAIR 12PW
£120.00 · 257% more, worseFs38 Hz +7%
Qts0.39 −4%
Vas45.3 L +19%, worse
BL5.3 T·m +21%, better
Xmax8.5 mm −15%, worse
Sensitivity88.8 dB +1.4
VisatonAL 170
£141.99 · 323% more, worseFs38 Hz +6%
Qts0.39 −5%
Vas34 L −11%, better
BL6.9 T·m +57%, better
Xmax11 mm +10%, better
Sensitivity88.4 dB +1
Scanspeak15W/8534T00
£155.41 · 363% more, worseFs32 Hz −11%, better
Qts0.39 −5%
Vas30 L −21%, better
BL5.5 T·m +25%, better
Xmax5 mm −50%, worse
Sensitivity85.6 dB −1.8
Scanspeak18WU/8747T00
£285.65 · 750% more, worseFs36 Hz –
Qts0.38 −7%
Vas36.2 L −5%
BL7.4 T·m +68%, better
Xmax9 mm −10%, worse
Sensitivity88 dB +0.6
Scanspeak18WU/4747T00
£289.85 · 763% more, worseFs36 Hz –
Qts0.35 −15%, better
Vas36 L −5%
BL5.9 T·m +34%, better
Xmax9 mm −10%, worse
Sensitivity88.4 dB +1
Scanspeak18WU/8741T00
£301.74 · 798% more, worseFs35 Hz –
Qts0.39 −5%
Vas37.1 L –
BL7.3 T·m +66%, better
Xmax9 mm −10%, worse
Sensitivity87.6 dB –
Scanspeak18WU/4741T00
£304.20 · 806% more, worseFs34 Hz −6%
Qts0.36 −12%, better
Vas38.4 L –
BL5.9 T·m +34%, better
Xmax9 mm −10%, worse
Sensitivity87.9 dB +0.5
£378.08 · 1025% more, worse
Fs34 Hz −6%
Qts0.42 –
Vas30 L −21%, better
BL6.6 T·m +50%, better
Xmax5 mm −50%, worse
Sensitivity85.8 dB −1.6
PurifiPTT6.5X08-NAA-08
£394.88 · 1075% more, worseFs34 Hz −6%
Qts0.40 –
Vas20.4 L −46%, better
BL9 T·m +105%, better
Xmax9.8 mm –
Sensitivity84.8 dB −2.6, worse
AccutonAS190-9-251
£1,137.72 · 3287% more, worseFs33 Hz −7%
Qts0.44 +7%
Vas26.7 L −30%, better
BL13.5 T·m +207%, better
Xmax9 mm −10%, worse
Sensitivity85.1 dB −2.3, worse
Tang BandW6-1721
No current priceFs40 Hz +11%, worse
Qts0.43 +5%
Vas29.4 L −23%, better
BL5.1 T·m +16%, better
Xmax8 mm −20%, worse
Sensitivity87.9 dB +0.5
Tang BandW6-789E
No current priceFs50 Hz +39%, worse
Qts0.46 +12%, worse
Vas41.5 L +9%
BL5.1 T·m +17%, better
Xmax4.3 mm −57%, worse
Sensitivity92.2 dB +4.8, better
WavecorWF168OM01
No current priceFs39 Hz +8%
Qts0.45 +10%
Vas29.5 L −22%, better
BL4.8 T·m +9%
Xmax4.2 mm −58%, worse
Sensitivity87.7 dB –
Lii AudioFAST 6
No current priceFs63 Hz +75%, worse
Qts0.46 +11%, worse
Vas22.9 L −40%, better
BL4.3 T·m −3%
Xmax6 mm −40%, worse
Sensitivity92.5 dB +5.1, better
KartesianSUB185_VKI
No current priceFs28 Hz −22%, better
Qts0.41 –
Vas38.6 L –
BL6.9 T·m +57%, better
Xmax15 mm +50%, better
Sensitivity84.8 dB −2.6, worse
Tang BandW6-2100
No current priceFs29 Hz −19%, better
Qts0.44 +7%
Vas16.2 L −57%, better
BL10.5 T·m +138%, better
Xmax10 mm –
Sensitivity81.2 dB −6.2, worse
Supravox165 GMF
No current priceFs70 Hz +94%, worse
Qts0.39 −5%
Vas40 L +5%
BL5.6 T·m +27%, better
Xmax6 mm −40%, worse
Sensitivity97.2 dB +9.8, better
WavecorWF146OM01
No current priceFs49 Hz +36%, worse
Qts0.42 –
Vas13.6 L −64%, better
BL4.6 T·m +5%
Xmax3.3 mm −67%, worse
Sensitivity87.5 dB –
Tang BandW6-623I
No current priceFs46 Hz +28%, worse
Qts0.41 –
Vas29.8 L −22%, better
BL6.7 T·m +52%, better
Xmax4 mm −60%, worse
Sensitivity90.1 dB +2.7, better
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
- SoundImports4.9 out of 512 ratings · Checked 21 Oct 2026Read reviews on SoundImports
- Parts Express4.4 out of 58 ratings · Checked 21 Oct 2026Read reviews on Parts Express
Each shop collects its own ratings. Bits shows them as published and doesn't verify them.
| Shop | Price | Against the lowest | Stock | Link |
|---|---|---|---|---|
Impact Audio | £62.34, the lowest price | In stock | Visit shop at Impact Audio | |
SoundImports Import VAT and duty may apply | £36.93 | 6 in stock | Visit shop at SoundImports | |
Parts Express Import VAT and duty may apply | £40.85 | 3 in stock | Visit shop at Parts Express | |
RumoH Import VAT and duty may apply | £41.00 | Stock not listed | Visit shop at RumoH |
Best price over time
Tracked since 5 Aug