GRS8PF-8
£16.29 · 37% less, betterFs50 Hz +6%
Qts0.98 −14%, better
Vas28.9 L −26%, better
BL6.5 T·m +44%, better
Xmax3 mm –
Sensitivity86.7 dB –
8-inch LF driver · WS series · 30 mm voice coil · 80 W
Visaton WS 20 E 4Ω
£35.94
SteadyImpact Audio · In stock · All 7 offers
- Fs
- 47Hz
- Xmax
- 3mm
- SPL
- 87dB
- Pe
- 80W
- BL
- 4.5T·m
- Vd
- 72cm³
- Qts
- 1.14
- Vas
- 39L
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 1 trace
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 pointsMedium confidence871 selected pixels of 1,105
Published graphs
Visaton WS 20 E is an 8-inch 4 ohm LF driver rated at 80 W RMS. The validated T/S data includes Fs 47 Hz, Qts 1.14, Vas 39 L, Xmax 3 mm, sensitivity 86.5 dB, plus 72 cm³ Vd and 33 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 £25.91.
The published T/S values agree with each other
Thiele/Small
- Fs
- 47Hz
- Qts
- 1.14
- Qes
- 1.44
- Qms
- 5.6
- Vas
- 39L
- Re
- 3.3Ω
- Le
- 0.70mH
Motor and cone
- BL
- 4.5T·m
- Sd
- 240cm²
- Mms
- 23g
- Xmax Derived
- 3mm
- Vd †
- 72cm³
- Voice coil
- 30mm
- Flux density
- 0.85T
Power and response
- Sensitivity †
- 86.5dB
- Manufacturer sensitivity
- 88dB
- Power
- 80W
- Impedance
- 4Ω
- High limit
- 7000Hz
- EBP †
- 33 · Leans sealed
Size and mounting
- Diameter
- 200mm
- Cutout
- 186mm
- Weight
- 1.3kg
Other published values
- Xmech
- 6
- Power Peak
- 120
Sensitivity shows 86.5 dB, calculated from the T/S values. Visaton publishes 88.0 dB, 1.5 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else Visaton lists
LF · Primary · 8″
- BL
- 4.5T·m
- Fs
- 47Hz
- Le
- 0.70mH
- Re
- 3.3Ω
- Sd
- 240cm²
- Mms
- 23g
- Qes
- 1.44
- Qms
- 5.6
- Qts
- 1.14
- SPL
- 86.5dB
- Vas
- 39L
- Xmax
- 3mm
- Xmech
- 6
- Power
- 80W
- Impedance
- 4Ω
- Power Peak
- 120
- Flux density
- 0.85T
- Sensitivity
- 88dB
- Calculated sensitivity †
- 86.5dB
- High limit
- 7000Hz
- Manufacturer sensitivity
- 88dB
- Voice coil
- 30mm
- Weight
- 1.3kg
- Diameter
- 200mm
- Cutout
- 186mm
02
Compare
Same-size drivers, compared with the WS 20 E. Clear differences are green when better and red when worse.
This driverWS 20 E
Best price
£25.91
Fs
47 Hz
Qts
1.14
Vas
39 L
BL
4.5 T·m
Xmax
3 mm
Sensitivity
86.5 dB
Power
80 W
GRS8FR-8
£17.54 · 32% less, betterFs45 Hz −4%
Qts0.56 −51%, better
Vas37.0 L −5%
BL8.5 T·m +89%, better
Xmax3 mm –
Sensitivity89.3 dB +2.8, better
MonacorSPM-200X/4
£25.96 · Same priceFs89 Hz +89%, worse
Qts0.97 −15%, better
Vas14.9 L −62%, better
BL3.9 T·m −13%, worse
Xmax1 mm −67%, worse
Sensitivity90.4 dB +3.9, better
VisatonW 200
£27.59 · 6% more, worseFs45 Hz −4%
Qts0.63 −45%, better
Vas54 L +38%, worse
BL4.2 T·m −7%
Xmax2 mm −33%, worse
Sensitivity90.1 dB +3.6, better
CIAREHW210
£36.00 · 39% more, worseFs41 Hz −13%, better
Qts0.84 −26%, better
Vas57.6 L +48%, worse
BL5.2 T·m +15%, better
Xmax5.3 mm +77%, better
Sensitivity87.8 dB +1.3
MonacorSPM-205/8
£38.40 · 48% more, worseFs37 Hz −21%, better
Qts0.70 −39%, better
Vas54 L +38%, worse
BL6.5 T·m +44%, better
Xmax3 mm –
Sensitivity86.8 dB –
MonacorSP-202E
£41.78 · 61% more, worseFs51 Hz +9%
Qts0.69 −39%, better
Vas39 L –
BL4.9 T·m +8%
Xmax2.5 mm −17%, worse
Sensitivity90.1 dB +3.6, better
Dayton AudioPA200-8
£44.87 · 73% more, worseFs55 Hz +17%, worse
Qts0.48 −58%, better
Vas26.6 L −32%, better
BL9.3 T·m +106%, better
Xmax3 mm –
Sensitivity91.5 dB +5, better
PRV Audio8FR250
£52.71 · 103% more, worseFs76 Hz +61%, worse
Qts1.02 −11%, better
Vas21.2 L −46%, better
BL6.5 T·m +45%, better
Xmax3.5 mm +17%, better
Sensitivity91.2 dB +4.7, better
Scanspeak18W/4424G00
£58.61 · 126% more, worseFs49 Hz +4%
Qts0.38 −67%, better
Vas24.1 L −38%, better
BL5.2 T·m +16%, better
Xmax2.8 mm −7%
Sensitivity90.3 dB +3.8, better
Dayton AudioRS180P-4
£59.83 · 131% more, worseFs38 Hz −20%, better
Qts0.39 −66%, better
Vas27.3 L −30%, better
BL4.7 T·m +4%
Xmax6 mm +100%, better
Sensitivity86.9 dB –
EminenceBETA-8A
£67.94 · 162% more, worseFs65 Hz +38%, worse
Qts0.38 −67%, better
Vas23.3 L −40%, better
BL9.6 T·m +113%, better
Xmax3 mm –
Sensitivity93.9 dB +7.4, better
PRV Audio69MR500-4
£68.20 · 163% more, worseFs149 Hz +217%, worse
Qts1.12 –
Vas5.2 L −87%, better
BL5.9 T·m +30%, better
Xmax3.3 mm +8%
Sensitivity93.6 dB +7.1, better
Dayton AudioRS180-4
£69.58 · 169% more, worseFs38 Hz −18%, better
Qts0.46 −60%, better
Vas21.2 L −46%, better
BL4.7 T·m +5%
Xmax6 mm +100%, better
Sensitivity85.1 dB −1.4
Scanspeak18W/4531G00
£179.98 · 595% more, worseFs33 Hz −30%, better
Qts0.35 −69%, better
Vas41.9 L +7%
BL5.7 T·m +27%, better
Xmax6.5 mm +117%, better
Sensitivity88 dB +1.5
Scanspeak18M/4631T00
£192.54 · 643% more, worseFs65 Hz +38%, worse
Qts0.60 −47%, better
Vas14 L −64%, better
BL5.6 T·m +24%, better
Xmax3 mm –
Sensitivity89.6 dB +3.1, better
SB AcousticsMT19CP-8
£234.41 · 805% more, worseFs43 Hz −9%
Qts0.31 −73%, better
Vas37.1 L −5%
BL8.1 T·m +79%, better
Xmax3.6 mm +20%, better
Sensitivity91.5 dB +5, better
Scanspeak18WU/4741T00
£304.20 · 1074% more, worseFs34 Hz −28%, better
Qts0.36 −68%, better
Vas38.4 L –
BL5.9 T·m +31%, better
Xmax9 mm +200%, better
Sensitivity87.9 dB +1.4
MonacorSP-202PA
No current priceFs68 Hz +45%, worse
Qts1.10 −4%
Vas12 L −69%, better
BL5.6 T·m +24%, better
Xmax3 mm –
Sensitivity84.3 dB −2.2, worse
Supravox215-2000 MK2
No current priceFs70 Hz +49%, worse
Qts0.84 −26%, better
Vas30 L −23%, better
BL5.2 T·m +16%, better
Xmax2.9 mm −3%
Sensitivity92.5 dB +6, better
CIARECXE184
No current priceFs113 Hz +140%, worse
Qts1.08 −5%
Vas3.4 L −91%, better
BL3.3 T·m −26%, worse
Xmax2.1 mm −30%, worse
Sensitivity87.5 dB +1
MonacorSPM-205/4
No current priceFs37 Hz −21%, better
Qts0.55 −52%, better
Vas72 L +85%, worse
BL4.8 T·m +6%
Xmax3 mm –
Sensitivity89.3 dB +2.8, better
Cube AudioF8 NEO V2
No current priceFs39 Hz −17%, better
Qts0.47 −59%, better
Vas45 L +15%, worse
BL9.5 T·m +111%, better
Xmax3 mm –
Sensitivity89.5 dB +3, better
CIARECW200Z
No current priceFs49 Hz +4%
Qts0.53 −54%, better
Vas38.3 L –
BL5.2 T·m +15%, better
Xmax4 mm +33%, better
Sensitivity90.1 dB +3.6, better
JensenP-A-JC8-30FA-8
No current priceFs126 Hz +168%, worse
Qts1.01 −11%, better
Vas10.8 L −72%, better
BL6.6 T·m +46%, better
Xmax0.5 mm −83%, worse
Sensitivity94 dB +7.5, better
PRV Audio8MR500-NDY-4
No current priceFs79 Hz +67%, worse
Qts0.54 −53%, better
Vas24.3 L −38%, better
BL6.0 T·m +34%, better
Xmax3 mm –
Sensitivity95.2 dB +8.7, better
Cube AudioF8 MAGUS
No current priceFs40 Hz −15%, better
Qts0.37 −68%, better
Vas53 L +36%, worse
BL9 T·m +100%, better
Xmax3 mm –
Sensitivity91.7 dB +5.2, better
PRV Audio8MB450
No current priceFs75 Hz +59%, worse
Qts1.05 −8%
Vas18.2 L −53%, better
BL7.4 T·m +64%, better
Xmax4.5 mm +50%, better
Sensitivity90.5 dB +4, better
Lii AudioFAST 6
No current priceFs63 Hz +34%, worse
Qts0.46 −60%, better
Vas22.9 L −41%, better
BL4.3 T·m −5%
Xmax6 mm +100%, better
Sensitivity92.5 dB +6, better
REDCATT8FHW-2
No current priceFs36 Hz −23%, better
Qts0.35 −69%, better
Vas34.3 L −12%, better
BL8.6 T·m +91%, better
Xmax3.6 mm +22%, better
Sensitivity88.3 dB +1.8
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
- SoundImports2.4 out of 53 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 |
|---|---|---|---|---|
Impact Audio | £35.94, the lowest price | In stock | Visit shop at Impact Audio | |
SoundImports Import VAT and duty may apply | £28.43 | Back order | Visit shop at SoundImports | |
Parts Express Import VAT and duty may apply | £31.66 | 2 in stock | Visit shop at Parts Express | |
RumoH Import VAT and duty may apply | £31.75 | Stock not listed | Visit shop at RumoH |
Best price over time
Tracked since 5 Aug