SB AcousticsSB20PFCR30-4
£31.27 · 95% less, betterFs34 Hz +31%, worse
Qts0.33 −8%
Vas66.2 L −6%
BL6.6 T·m −18%, worse
Xmax5.8 mm −38%, worse
Sensitivity90.5 dB +3.3, better
8-inch LF driver · PTT series · 52 mm voice coil · 90 W
Purifi PTT8.0X04-NAB-01 4Ω
4 Ω
£586.08
SteadySoundImports · 1 in stock · Ships from Netherlands · All 1 offer
- Fs
- 26Hz
- Xmax
- 9.3mm
- SPL
- 87dB
- Pe
- 90W
- BL
- 8T·m
- Vd
- 219cm³
- Qts
- 0.36
- Vas
- 70L
Purifi PTT8.0X04-NAB-01 is an 8-inch 4 ohm LF driver rated at 90 W RMS. The validated T/S data includes Fs 26 Hz, Qts 0.36, Vas 70.4 L, Xmax 9.3 mm, sensitivity 87.2 dB, plus 219 cm³ Vd and 68 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 £586.08.
The published T/S values agree with each other
Thiele/Small
- Fs
- 26Hz
- Qts
- 0.36
- Qes
- 0.38
- Qms
- 5.3
- Vas
- 70.4L
- Re
- 3.5Ω
- Le
- 0.18mH
Motor and cone
- BL
- 8T·m
- Sd
- 235cm²
- Mms
- 43g
- Xmax
- 9.3mm
- Vd †
- 219cm³
- Voice coil
- 52mm
Power and response
- Sensitivity †
- 87.2dB
- Manufacturer sensitivity
- 89.3dB
- Power
- 90W
- Impedance
- 4Ω
- Min. impedance
- 3.8Ω
- EBP †
- 68 · Sealed or vented
Size and mounting
- Diameter
- 221mm
- Cutout
- 193mm
- Bolt circle
- 210mm
- Weight
- 3.5kg
Other published values
- Cms
- 0.90mm/N
- Rms
- 1.32kg/s
- Xmech
- 15
- Power Peak
- 350
Other dimensions
- Mounting Depth
- 102
Sensitivity shows 87.2 dB, calculated from the T/S values. Purifi publishes 89.3 dB, 2.1 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else Purifi lists
LF · Primary · 8″
- BL
- 8T·m
- Fs
- 26Hz
- Le
- 0.18mH
- Re
- 3.5Ω
- Sd
- 235cm²
- Cms
- 0.90mm/N
- Mms
- 43g
- Qes
- 0.38
- Qms
- 5.3
- Qts
- 0.36
- Rms
- 1.32kg/s
- SPL
- 87.2dB
- Vas
- 70.4L
- Xmax
- 9.3mm
- Xmech
- 15
- Power
- 90W
- Impedance
- 4Ω
- Power Peak
- 350
- Sensitivity
- 89.3dB
- Calculated sensitivity †
- 87.2dB
- Manufacturer sensitivity
- 89.3dB
- Min. impedance
- 3.8Ω
- Voice coil
- 52mm
- Weight
- 3.5kg
- Diameter
- 221mm
- Mounting Depth
- 102
- Cutout
- 193mm
- Bolt circle
- 210mm
02
Compare
Same-size drivers, compared with the PTT8.0X04-NAB-01. Clear differences are green when better and red when worse.
This driverPTT8.0X04-NAB-01
Best price
£586.08
Fs
26 Hz
Qts
0.36
Vas
70.4 L
BL
8 T·m
Xmax
9.3 mm
Sensitivity
87.2 dB
Power
90 W
SB AcousticsSB20PFCR30-8
£33.07 · 94% less, betterFs34 Hz +31%, worse
Qts0.37 –
Vas66.2 L −6%
BL7.7 T·m −4%
Xmax5.8 mm −38%, worse
Sensitivity89.8 dB +2.6, better
SB AcousticsSB20PFC30-8
£35.17 · 94% less, betterFs34 Hz +31%, worse
Qts0.37 –
Vas66.2 L −6%
BL7.7 T·m −4%
Xmax5.7 mm −39%, worse
Sensitivity89.8 dB +2.6, better
PeerlessHDS-P830869
£46.01 · 92% less, betterFs34 Hz +31%, worse
Qts0.38 +6%
Vas57.6 L −18%, better
BL9.3 T·m +17%, better
Xmax7.5 mm −19%, worse
Sensitivity89.5 dB +2.3, better
VisatonW 200 S
£50.23 · 91% less, betterFs29 Hz +12%, worse
Qts0.35 –
Vas65 L −8%
BL7.7 T·m −4%
Xmax3.5 mm −62%, worse
Sensitivity88.2 dB +1
CIAREHWB200
£72.01 · 88% less, betterFs32 Hz +23%, worse
Qts0.38 +6%
Vas57 L −19%, better
BL7.3 T·m −9%
Xmax7 mm −25%, worse
Sensitivity88.8 dB +1.6
Dayton AudioRS225P-8A
£87.88 · 85% less, betterFs32 Hz +22%, worse
Qts0.34 −6%
Vas68.8 L –
BL8.5 T·m +6%
Xmax7 mm −25%, worse
Sensitivity88.8 dB +1.6
SB AcousticsSB23NACS45-8
£88.56 · 85% less, betterFs25 Hz −4%
Qts0.37 –
Vas94 L +34%, worse
BL7.9 T·m –
Xmax6.5 mm −30%, worse
Sensitivity87.7 dB +0.5
VisatonGF 200
£132.67 · 77% less, betterFs30 Hz +15%, worse
Qts0.34 −6%
Vas68 L −3%
BL9.2 T·m +15%, better
Xmax6 mm −35%, worse
Sensitivity89 dB +1.8
VisatonAL 200
£150.67 · 74% less, betterFs32 Hz +23%, worse
Qts0.35 –
Vas77 L +9%
BL8.8 T·m +10%, better
Xmax7 mm −25%, worse
Sensitivity90.1 dB +2.9, better
MarkaudioMA200-M MULTI
£156.00 · 73% less, betterFs33 Hz +27%, worse
Qts0.35 −4%
Vas65.2 L −7%
BL8.5 T·m +7%
Xmax9 mm −3%
Sensitivity89.6 dB +2.4, better
Scanspeak18W/8531G00
£168.81 · 71% less, betterFs28 Hz +8%
Qts0.36 –
Vas58.2 L −17%, better
BL6.8 T·m −15%, worse
Xmax6.5 mm −30%, worse
Sensitivity87.2 dB –
SB AcousticsWO24P-8
£185.95 · 68% less, betterFs25 Hz −6%
Qts0.38 +6%
Vas87.5 L +24%, worse
BL9.9 T·m +24%, better
Xmax8.5 mm −9%
Sensitivity87 dB –
SB AcousticsWO24P-4
£195.93 · 67% less, betterFs28 Hz +8%
Qts0.40 +11%, worse
Vas71 L –
BL7.6 T·m −5%
Xmax8.5 mm −9%
Sensitivity87.7 dB +0.5
Scanspeak18WU/8747T00
£284.64 · 51% less, betterFs36 Hz +38%, worse
Qts0.38 +6%
Vas36.2 L −49%, better
BL7.4 T·m −7%
Xmax9 mm −3%
Sensitivity88 dB +0.8
Scanspeak18WU/4747T00
£288.83 · 51% less, betterFs36 Hz +38%, worse
Qts0.35 –
Vas36 L −49%, better
BL5.9 T·m −26%, worse
Xmax9 mm −3%
Sensitivity88.4 dB +1.2
SB AcousticsWO24TX-4
£292.97 · 50% less, betterFs26 Hz –
Qts0.35 –
Vas79 L +12%, worse
BL7.9 T·m –
Xmax8.8 mm −6%
Sensitivity87.9 dB +0.7
SB AcousticsWO24TX-8
£292.97 · 50% less, betterFs25 Hz −6%
Qts0.34 −6%
Vas88 L +25%, worse
BL10.4 T·m +31%, better
Xmax8.6 mm −8%
Sensitivity87.6 dB –
Scanspeak18WU/8741T00
£300.68 · 49% less, betterFs35 Hz +35%, worse
Qts0.39 +8%
Vas37.1 L −47%, better
BL7.3 T·m −9%
Xmax9 mm −3%
Sensitivity87.6 dB –
Scanspeak18WU/4741T00
£304.20 · 48% less, betterFs34 Hz +31%, worse
Qts0.36 –
Vas38.4 L −45%, better
BL5.9 T·m −26%, worse
Xmax9 mm −3%
Sensitivity87.9 dB +0.7
£309.76 · 47% less, better
Fs33 Hz +27%, worse
Qts0.30 −17%, better
Vas72 L –
BL8.8 T·m +10%, better
Xmax7 mm −25%, worse
Sensitivity90.6 dB +3.4, better
Tang BandW8-2096B
No current priceFs32 Hz +23%, worse
Qts0.32 −11%, better
Vas57.9 L −18%, better
BL8.0 T·m –
Xmax8.5 mm −9%
Sensitivity89.1 dB +1.9
PurifiPTT8.0X08-NAB-01
No current priceFs24 Hz −8%
Qts0.35 –
Vas74.5 L +6%
BL10.7 T·m +34%, better
Xmax9.3 mm –
Sensitivity86.5 dB −0.7
RS SpeakersW 220.50 FIBONACCI
No current priceFs33 Hz +28%, worse
Qts0.36 –
Vas55.6 L −21%, better
BL8.6 T·m +7%
Xmax6 mm −35%, worse
Sensitivity89.3 dB +2.1, better
SB AcousticsMW19PF-8
No current priceFs30 Hz +15%, worse
Qts0.34 −6%
Vas63 L −11%, better
BL7 T·m −13%, worse
Xmax6.5 mm −30%, worse
Sensitivity88.7 dB +1.5
MarkaudioMA200-P MICA
No current priceFs39 Hz +50%, worse
Qts0.37 +4%
Vas66.5 L −6%
BL7.0 T·m −12%, worse
Xmax7 mm −25%, worse
Sensitivity91.5 dB +4.3, better
Supravox215 GMF
No current priceFs54 Hz +108%, worse
Qts0.36 –
Vas60 L −15%, better
BL9.7 T·m +21%, better
Xmax3.7 mm −60%, worse
Sensitivity96 dB +8.8, better
Audio Technology8 A 77 20 06 SD
No current priceFs30 Hz +15%, worse
Qts0.30 −17%, better
Vas67 L −5%
BL9.3 T·m +16%, better
Xmax8 mm −14%, worse
Sensitivity89.2 dB +2, better
Dayton AudioPM220-8
No current priceFs49 Hz +89%, worse
Qts0.38 +6%
Vas63 L −11%, better
BL7.2 T·m −10%
Xmax4.6 mm −51%, worse
Sensitivity94.6 dB +7.4, better
Cube AudioF8 MAGUS
No current priceFs40 Hz +54%, worse
Qts0.37 –
Vas53 L −25%, better
BL9 T·m +13%, better
Xmax3 mm −68%, worse
Sensitivity91.7 dB +4.5, better
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 53 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 |
|---|---|---|---|---|
SoundImports Import VAT and duty may apply | £586.08, the lowest price | 1 in stock | Visit shop at SoundImports |
Best price over time
Tracked since 1 Apr