SB AcousticsSB20PFCR30-8
£33.07 · 61% less, betterFs34 Hz +13%, worse
Qts0.37 −5%
Vas66.2 L −30%, better
BL7.7 T·m –
Xmax5.8 mm –
Sensitivity89.8 dB –
8-inch LF driver · Discovery series · 38 mm voice coil · 70 W
Scanspeak 22W/8534G00 8Ω
8 Ω
- Fs
- 30Hz
- Xmax
- 5.8mm
- SPL
- 90dB
- Pe
- 70W
- BL
- 7.8T·m
- Vd
- 136cm³
- Qts
- 0.39
- Vas
- 94L
Scanspeak 22W/8534G00 is an 8-inch 8 ohm LF driver rated at 70 W RMS. The validated T/S data includes Fs 30 Hz, Qts 0.39, Vas 94.2 L, Xmax 5.8 mm, sensitivity 89.7 dB, plus 136 cm³ Vd and 70 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 £85.75.
The published T/S values agree with each other
Thiele/Small
- Fs
- 30Hz
- Qts
- 0.39
- Qes
- 0.43
- Qms
- 4.1
- Vas
- 94.2L
- Re
- 5.9Ω
- Le
- 0.56mH
Motor and cone
- BL
- 7.8T·m
- Sd
- 235cm²
- Mms
- 23g
- Xmax
- 5.8mm
- Vd †
- 136cm³
- Voice coil
- 38mm
Power and response
- Sensitivity †
- 89.7dB
- Manufacturer sensitivity
- 89dB
- Power
- 70W
- Impedance
- 8Ω
- Min. impedance
- 6.8Ω
- EBP †
- 70 · Sealed or vented
Size and mounting
- Diameter
- 220mm
Other published values
- Cms
- 1.22mm/N
- Rms
- 1.05kg/s
- Power Peak
- 120
† Calculated by bits from the published values
What this validation status means
Everything else Scanspeak lists
LF · Primary · 8″
- BL
- 7.8T·m
- Fs
- 30Hz
- Le
- 0.56mH
- Re
- 5.9Ω
- Sd
- 235cm²
- Cms
- 1.22mm/N
- Mms
- 23g
- Qes
- 0.43
- Qms
- 4.1
- Qts
- 0.39
- Rms
- 1.05kg/s
- SPL
- 89.7dB
- Vas
- 94.2L
- Xmax
- 5.8mm
- Power
- 70W
- Impedance
- 8Ω
- Power Peak
- 120
- Sensitivity
- 89dB
- Calculated sensitivity †
- 89.7dB
- Manufacturer sensitivity
- 89dB
- Min. impedance
- 6.8Ω
- Voice coil
- 38mm
- Diameter
- 220mm
02
Compare
Same-size drivers, compared with the 22W/8534G00. Clear differences are green when better and red when worse.
This driver22W/8534G00
Best price
£85.75
Fs
30 Hz
Qts
0.39
Vas
94.2 L
BL
7.8 T·m
Xmax
5.8 mm
Sensitivity
89.7 dB
Power
70 W
SB AcousticsSB20PFC30-8
£35.17 · 59% less, betterFs34 Hz +13%, worse
Qts0.37 −5%
Vas66.2 L −30%, better
BL7.7 T·m –
Xmax5.7 mm –
Sensitivity89.8 dB –
Dayton AudioSD215A-88
£50.20 · 41% less, betterFs31 Hz +3%
Qts0.39 –
Vas38.2 L −59%, better
BL7.7 T·m –
Xmax6 mm +3%
Sensitivity86.1 dB −3.6, worse
Beyma8BR40
£53.89 · 37% less, betterFs30 Hz –
Qts0.39 –
Vas89.1 L −5%
BL6.8 T·m −13%, worse
Xmax6.7 mm +16%, better
Sensitivity89 dB −0.7
REDCATT8FR
£66.10 · 23% less, betterFs53 Hz +77%, worse
Qts0.38 −3%
Vas36.8 L −61%, better
BL7.9 T·m –
Xmax5.8 mm –
Sensitivity93.4 dB +3.7, better
SB AcousticsSB23NRXS45-8
£84.41 · 2% lessFs27 Hz −10%, better
Qts0.38 –
Vas94 L –
BL7.5 T·m −4%
Xmax6.5 mm +12%, better
Sensitivity88.6 dB −1.1
SB AcousticsSB23NACS45-8
£88.56 · 3% moreFs25 Hz −17%, better
Qts0.37 −5%
Vas94 L –
BL7.9 T·m –
Xmax6.5 mm +12%, better
Sensitivity87.7 dB −2, worse
Scanspeak22W/4534G00
£91.27 · 6% more, worseFs30 Hz –
Qts0.34 −13%, better
Vas95 L –
BL6 T·m −23%, worse
Xmax5.7 mm –
Sensitivity90.4 dB +0.7
SB AcousticsSB23NBACS45-8
£97.88 · 14% more, worseFs25 Hz −17%, better
Qts0.40 –
Vas93.4 L –
BL7.9 T·m –
Xmax6.5 mm +12%, better
Sensitivity87.3 dB −2.4, worse
MonacorSPH-220HQ
£104.66 · 22% more, worseFs30 Hz –
Qts0.40 –
Vas80 L −15%, better
BL7.6 T·m –
Xmax5.5 mm −5%
Sensitivity88.7 dB −1
SB AcousticsSB23CACS45-8
£114.02 · 33% more, worseFs25 Hz −17%, better
Qts0.40 –
Vas87 L −8%
BL7.9 T·m –
Xmax6.5 mm +12%, better
Sensitivity86.9 dB −2.8, worse
SEASH1288-08 CA22RNX
£119.94 · 40% more, worseFs29 Hz −3%
Qts0.41 +5%
Vas97 L –
BL7 T·m −10%, worse
Xmax6 mm +3%
Sensitivity88.6 dB −1.1
ETON8-512/C8/32 HEX
£184.17 · 115% more, worseFs27 Hz −10%, better
Qts0.40 –
Vas102 L +8%
BL7.8 T·m –
Xmax5.5 mm −5%
Sensitivity88.7 dB −1
SB AcousticsWO24P-4
£195.93 · 128% more, worseFs28 Hz −7%
Qts0.40 –
Vas71 L −25%, better
BL7.6 T·m –
Xmax8.5 mm +47%, better
Sensitivity87.7 dB −2, worse
Dayton AudioPS220-8
£200.12 · 133% more, worseFs46 Hz +55%, worse
Qts0.38 –
Vas90.2 L −4%
BL6.2 T·m −21%, worse
Xmax4.8 mm −17%, worse
Sensitivity95.6 dB +5.9, better
WavecorWF223BD01
£205.39 · 140% more, worseFs33 Hz +9%
Qts0.39 –
Vas45 L −52%, better
BL7.7 T·m –
Xmax6.5 mm +12%, better
Sensitivity87.9 dB −1.8
£393.49 · 359% more, worse
Fs25 Hz −17%, better
Qts0.34 −13%, better
Vas98 L +4%
BL8.1 T·m +4%
Xmax5 mm −14%, worse
Sensitivity87.8 dB −1.9
AccutonS220-6-221
£444.61 · 418% more, worseFs22 Hz −26%, better
Qts0.37 −5%
Vas112.9 L +20%, worse
BL8.3 T·m +6%
Xmax5 mm −14%, worse
Sensitivity87 dB −2.7, worse
AccutonC220-6-221
£491.94 · 474% more, worseFs26 Hz −12%, better
Qts0.40 –
Vas86.2 L −8%
BL8.7 T·m +12%, better
Xmax5 mm −14%, worse
Sensitivity87.8 dB −1.9
£527.46 · 515% more, worse
Fs25 Hz −17%, better
Qts0.39 –
Vas93 L –
BL8.3 T·m +6%
Xmax7 mm +21%, better
Sensitivity87.2 dB −2.5, worse
HiViSS8R
No current priceFs30 Hz –
Qts0.35 −10%, better
Vas92.9 L –
BL6.6 T·m −15%, worse
Xmax6 mm +3%
Sensitivity90 dB –
HiViS8
No current priceFs30 Hz –
Qts0.34 −13%, better
Vas98.5 L +5%
BL6.3 T·m −19%, worse
Xmax5.8 mm –
Sensitivity90.1 dB –
HiViS8.8N
No current priceFs32 Hz +7%
Qts0.41 +5%
Vas85.3 L −9%
BL8 T·m –
Xmax4.3 mm −26%, worse
Sensitivity90 dB –
HiViS8-98R
No current priceFs33 Hz +10%, worse
Qts0.42 +8%
Vas65.2 L −31%, better
BL6.9 T·m −12%, worse
Xmax6 mm +3%
Sensitivity89 dB −0.7
HiViSS8
No current priceFs30 Hz –
Qts0.33 −15%, better
Vas83.3 L −12%, better
BL6.8 T·m −13%, worse
Xmax6 mm +3%
Sensitivity89.6 dB –
RS SpeakersW 220.50 FIBONACCI
No current priceFs33 Hz +11%, worse
Qts0.36 −8%
Vas55.6 L −41%, better
BL8.6 T·m +10%, better
Xmax6 mm +3%
Sensitivity89.3 dB –
Eighteen Sound8MB400
No current priceFs64 Hz +113%, worse
Qts0.38 –
Vas23.9 L −75%, better
BL9.3 T·m +19%, better
Xmax5.8 mm –
Sensitivity93.7 dB +4, better
Dayton AudioPM220-8
No current priceFs49 Hz +64%, worse
Qts0.38 –
Vas63 L −33%, better
BL7.2 T·m −8%
Xmax4.6 mm −21%, worse
Sensitivity94.6 dB +4.9, better
WavecorWF182BD11
No current priceFs34 Hz +13%, worse
Qts0.42 +8%
Vas24.3 L −74%, better
BL8.2 T·m +5%
Xmax5.5 mm −5%
Sensitivity85.4 dB −4.3, worse
WavecorWF182BD19
No current priceFs34 Hz +13%, worse
Qts0.42 +8%
Vas24.3 L −74%, better
BL8.2 T·m +5%
Xmax5.5 mm −5%
Sensitivity85.4 dB −4.3, worse
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
Tests and measurements
Measurements · HTGuide Forum
Eight inch woofer testing, report
8 January 2023 · Read by Bits 29 Sep 2026
A builder choosing an 8-inch woofer for a two-way measured every candidate in the same 1.5 ft³ sealed box: impedance, response and distortion at 2.83 V, and a trial 1.8 kHz crossover. The 22W/8534G00 made the cut for the second round; the finished build used a Wavecor WF223BD01, which joined the test late.
Discussed in
Parts Express Techtalk
DIYMobileAudio
Summaries are Bits’ own words. Each source belongs to its publisher. Report a problem
Shop ratings
- SoundImports4.0 out of 53 ratings · Checked 26 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 | £85.75, the lowest price | 4 in stock | Visit shop at Hifi Collective | |
Falcon Acoustics | £105.78 | 23% above the lowest price | In stock | Visit shop at Falcon Acoustics |
Willys-Hifi | £111.73 | 30% above the lowest price | Stock not listed | Visit shop at Willys-Hifi |
SoundImports Import VAT and duty may apply | £100.44 | 17% above the lowest price | Back order | Visit shop at SoundImports |
Best price over time
Tracked since 1 Apr
Recent changes
- 1 OctWillys-Hifi£114.95 → £111.73Down 2.8% from £114.95
- 28 SepWillys-Hifi£113.95 → £114.95Up 0.9% from £113.95
- 23 SepWillys-Hifi£114.95 → £113.95Down 0.9% from £114.95