PRV Audio8MR500-4
£37.34 · 24% more, worseFs78 Hz +106%, worse
Qts0.46 +5%
Vas20.8 L −81%, better
BL6.5 T·m +6%
Xmax3.3 mm +63%, better
Sensitivity95.2 dB +2.4, better
8-inch LF driver · BG series · 25 mm voice coil · 40 W
Visaton BG 20 8Ω
8 Ω
£30.00
SteadyThomann · In stock · All 6 offers
- Fs
- 38Hz
- Xmax
- 2mm
- SPL
- 93dB
- Pe
- 40W
- BL
- 6.1T·m
- Vd
- 43cm³
- Qts
- 0.44
- Vas
- 110L
Published graphs
Visaton BG 20 is an 8-inch 8 ohm LF driver rated at 40 W RMS. The validated T/S data includes Fs 38 Hz, Qts 0.44, Vas 110 L, Xmax 2 mm, sensitivity 92.8 dB, plus 43 cm³ Vd and 75 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 £30.00.
The published T/S values agree with each other
Thiele/Small
- Fs
- 38Hz
- Qts
- 0.44
- Qes
- 0.51
- Qms
- 3.5
- Vas
- 110L
- Re
- 6.2Ω
- Le
- 0.80mH
Motor and cone
- BL
- 6.1T·m
- Sd
- 214cm²
- Mms
- 10g
- Xmax Derived
- 2mm
- Vd †
- 43cm³
- Voice coil
- 25mm
- Flux density
- 1.20T
Power and response
- Sensitivity †
- 92.8dB
- Manufacturer sensitivity
- 92dB
- Power
- 40W
- Impedance
- 8Ω
- High limit
- 18000Hz
- EBP †
- 75 · Sealed or vented
Size and mounting
- Diameter
- 200mm
- Cutout
- 184mm
- Weight
- 1.3kg
Other published values
- Xmech
- 6
- Power Peak
- 70
† Calculated by bits from the published values
What this validation status means
Everything else Visaton lists
LF · Primary · 8″
- BL
- 6.1T·m
- Fs
- 38Hz
- Le
- 0.80mH
- Re
- 6.2Ω
- Sd
- 214cm²
- Mms
- 10g
- Qes
- 0.51
- Qms
- 3.5
- Qts
- 0.44
- SPL
- 92.8dB
- Vas
- 110L
- Xmax
- 2mm
- Xmech
- 6
- Power
- 40W
- Impedance
- 8Ω
- Power Peak
- 70
- Flux density
- 1.20T
- Sensitivity
- 92dB
- Calculated sensitivity †
- 92.8dB
- High limit
- 18000Hz
- Manufacturer sensitivity
- 92dB
- Voice coil
- 25mm
- Weight
- 1.3kg
- Diameter
- 200mm
- Cutout
- 184mm
02
Compare
Same-size drivers, compared with the BG 20. Clear differences are green when better and red when worse.
This driverBG 20
Best price
£30.00
Fs
38 Hz
Qts
0.44
Vas
110 L
BL
6.1 T·m
Xmax
2 mm
Sensitivity
92.8 dB
Power
40 W
SB AcousticsSB20FRPC30-8
£37.67 · 26% more, worseFs39 Hz +4%
Qts0.45 –
Vas66.3 L −40%, better
BL7.2 T·m +17%, better
Xmax4.1 mm +105%, better
Sensitivity91.4 dB −1.4
CIAREHW202
£49.40 · 65% more, worseFs30 Hz −21%, better
Qts0.44 –
Vas83 L −25%, better
BL6.7 T·m +10%, better
Xmax6.5 mm +225%, better
Sensitivity88.4 dB −4.4, worse
Beyma8BR40
£53.89 · 80% more, worseFs30 Hz −21%, better
Qts0.39 −11%, better
Vas89.1 L −19%, better
BL6.8 T·m +11%, better
Xmax6.7 mm +235%, better
Sensitivity89 dB −3.8, worse
Scanspeak18W/8434G00
£57.57 · 92% more, worseFs50 Hz +32%, worse
Qts0.43 –
Vas19.5 L −82%, better
BL7.2 T·m +18%, better
Xmax4.2 mm +110%, better
Sensitivity89.3 dB −3.5, worse
Scanspeak18W/8424G00
£57.77 · 93% more, worseFs54 Hz +42%, worse
Qts0.45 –
Vas20.3 L −82%, better
BL6.6 T·m +8%
Xmax2.6 mm +30%, better
Sensitivity90 dB −2.8, worse
Dayton AudioRS225-4
£67.31 · 124% more, worseFs33 Hz −13%, better
Qts0.41 −7%
Vas46.4 L −58%, better
BL6.4 T·m +5%
Xmax6 mm +200%, better
Sensitivity87.1 dB −5.7, worse
Dayton AudioRS225P-4A
£67.31 · 124% more, worseFs38 Hz –
Qts0.38 −14%, better
Vas45.8 L −58%, better
BL6.4 T·m +5%
Xmax6 mm +200%, better
Sensitivity89.1 dB −3.7, worse
SB AcousticsSB23NRXS45-8
£84.41 · 181% more, worseFs27 Hz −29%, better
Qts0.38 −14%, better
Vas94 L −15%, better
BL7.5 T·m +23%, better
Xmax6.5 mm +225%, better
Sensitivity88.6 dB −4.2, worse
Scanspeak22W/8534G00
£85.75 · 186% more, worseFs30 Hz −21%, better
Qts0.39 −11%, better
Vas94.2 L −14%, better
BL7.8 T·m +28%, better
Xmax5.8 mm +190%, better
Sensitivity89.7 dB −3.1, worse
Scanspeak22W/4534G00
£91.27 · 204% more, worseFs30 Hz −21%, better
Qts0.34 −23%, better
Vas95 L −14%, better
BL6 T·m –
Xmax5.7 mm +185%, better
Sensitivity90.4 dB −2.4, worse
SB AcousticsSB23NBACS45-8
£97.88 · 226% more, worseFs25 Hz −34%, better
Qts0.40 −9%
Vas93.4 L −15%, better
BL7.9 T·m +30%, better
Xmax6.5 mm +225%, better
Sensitivity87.3 dB −5.5, worse
MonacorSPH-220HQ
£104.66 · 249% more, worseFs30 Hz −21%, better
Qts0.40 −9%
Vas80 L −27%, better
BL7.6 T·m +25%, better
Xmax5.5 mm +175%, better
Sensitivity88.7 dB −4.1, worse
SB AcousticsSB23CACS45-8
£114.02 · 280% more, worseFs25 Hz −34%, better
Qts0.40 −9%
Vas87 L −21%, better
BL7.9 T·m +30%, better
Xmax6.5 mm +225%, better
Sensitivity86.9 dB −5.9, worse
SEASH1288-08 CA22RNX
£119.94 · 300% more, worseFs29 Hz −24%, better
Qts0.41 −7%
Vas97 L −12%, better
BL7 T·m +15%, better
Xmax6 mm +200%, better
Sensitivity88.6 dB −4.2, worse
Scanspeak18W/8535-01
£145.25 · 384% more, worseFs25 Hz −34%, better
Qts0.38 −14%, better
Vas68.9 L −37%, better
BL5.9 T·m −3%
Xmax5 mm +150%, better
Sensitivity85.7 dB −7.1, worse
Tang BandW8-2145
£150.67 · 402% more, worseFs40 Hz +5%
Qts0.45 –
Vas67.7 L −38%, better
BL6.6 T·m +8%
Xmax3 mm +50%, better
Sensitivity90.5 dB −2.3, worse
ETON8-512/C8/32 HEX
£184.17 · 514% more, worseFs27 Hz −29%, better
Qts0.40 −9%
Vas102 L −7%
BL7.8 T·m +28%, better
Xmax5.5 mm +175%, better
Sensitivity88.7 dB −4.1, worse
Dayton AudioPS220-8
£200.12 · 567% more, worseFs46 Hz +22%, worse
Qts0.38 −14%, better
Vas90.2 L −18%, better
BL6.2 T·m –
Xmax4.8 mm +140%, better
Sensitivity95.6 dB +2.8, better
Tang BandW8-2314
£293.02 · 877% more, worseFs38 Hz –
Qts0.46 +5%
Vas49.5 L −55%, better
BL6.1 T·m –
Xmax6 mm +200%, better
Sensitivity89 dB −3.8, worse
Tang BandW8-1808
£358.37 · 1095% more, worseFs45 Hz +18%, worse
Qts0.44 –
Vas88.1 L −20%, better
BL5.3 T·m −13%, worse
Xmax5 mm +150%, better
Sensitivity92.9 dB –
SEASX1-08 EXOTIC F8
No current priceFs32 Hz −16%, better
Qts0.44 –
Vas143 L +30%, worse
BL5.3 T·m −14%, worse
Xmax2.1 mm +5%
Sensitivity91.7 dB −1.1
Supravox215 RTF 64 BI-CÔNE
No current priceFs57 Hz +50%, worse
Qts0.46 +5%
Vas80 L −27%, better
BL6.5 T·m +6%
Xmax2.3 mm +15%, better
Sensitivity96.5 dB +3.7, better
HiViS8-98
No current priceFs34 Hz −11%, better
Qts0.44 –
Vas64.9 L −41%, better
BL6.6 T·m +8%
Xmax5.8 mm +190%, better
Sensitivity88.9 dB −3.9, worse
HiViS8-98R
No current priceFs33 Hz −13%, better
Qts0.42 −5%
Vas65.2 L −41%, better
BL6.9 T·m +13%, better
Xmax6 mm +200%, better
Sensitivity89 dB −3.8, worse
SEASX1-04 EXOTIC F8
No current priceFs31 Hz −18%, better
Qts0.39 −11%, better
Vas146 L +33%, worse
BL4.2 T·m −31%, worse
Xmax2.1 mm +5%
Sensitivity92.1 dB −0.7
CIARECW202
No current priceFs40 Hz +5%
Qts0.41 −7%
Vas48 L −56%, better
BL6.5 T·m +7%
Xmax6.5 mm +225%, better
Sensitivity90.1 dB −2.7, worse
HiViS8
No current priceFs30 Hz −21%, better
Qts0.34 −23%, better
Vas98.5 L −10%, better
BL6.3 T·m +3%
Xmax5.8 mm +190%, better
Sensitivity90.1 dB −2.7, worse
HiViS8.8N
No current priceFs32 Hz −16%, better
Qts0.41 −7%
Vas85.3 L −22%, better
BL8 T·m +31%, better
Xmax4.3 mm +115%, better
Sensitivity90 dB −2.8, worse
HiViSS8R
No current priceFs30 Hz −21%, better
Qts0.35 −20%, better
Vas92.9 L −16%, better
BL6.6 T·m +8%
Xmax6 mm +200%, better
Sensitivity90 dB −2.8, worse
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
- Thomann4.6 out of 5133 ratings · Checked 25 Oct 2026Read reviews on Thomann
- SoundImports5.0 out of 54 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 |
|---|---|---|---|---|
Thomann | £30.00, the lowest price | In stock | Visit shop at Thomann | |
SoundImports Import VAT and duty may apply | £36.80 | 23% above the lowest price | 8 in stock | Visit shop at SoundImports |
RumoH Import VAT and duty may apply | £37.08 | 24% above the lowest price | In stock | Visit shop at RumoH |
Best price over time
Tracked since 20 Apr
Recent changes
- 27 AugThomann£31.00 → £30.00Down 3.2% from £31.00
- 28 JunThomann£32.00 → £31.00Down 3.1% from £32.00
- 20 JunThomann£31.00 → £32.00Up 3.2% from £31.00