8-inch LF driver · SB20 series · 31 mm voice coil · 50 W

SB Acoustics SB20PFC30-8 8Ω

Name: SB Acoustics SB20PFC30-8 8 Ohm
Brand: SB Acoustics
SKU: SB20PFC30-8
Availability: InStock

8 Ω

1 rating at 1 shop

£35.60

2.2%

RumoH · Ships from Netherlands · All 2 offers

Open in 00 Simulator

Fs: 34Hz
Xmax: 5.7mm
SPL: 90dB
Pe: 50W
BL: 7.7T·m
Vd: 122cm³
Qts: 0.37
Vas: 66L

See all 21 specs

Specifications

Published by SB Acoustics

Manufacturer page

Datasheet PDF

SB Acoustics SB20PFC30-8 is an 8-inch 8 ohm LF driver rated at 50 W RMS. The validated T/S data includes Fs 34 Hz, Qts 0.37, Vas 66.2 L, Xmax 5.7 mm, sensitivity 89.8 dB, plus 122 cm³ Vd and 79 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 £35.60.

The published T/S values agree with each other

Thiele/Small

Fs: 34Hz
Qts: 0.37
Qes: 0.43
Qms: 2.7
Vas: 66.2L
Re: 5.6Ω
Le: 0.84mH

Motor and cone

BL: 7.7T·m
Sd: 216cm²
Mms: 21g
Xmax: 5.7mm
Vd †: 122cm³
Voice coil: 31mm
Flux density: 1.20T

Power and response

Sensitivity †: 89.8dB
Manufacturer sensitivity: 90.5dB
Power: 50W
Impedance: 8Ω
EBP †: 79 · Sealed or vented

Size and mounting

Weight: 1.4kg

Other published values

Cms: 1mm/N

† Calculated by bits from the published values

What this validation status means

Everything else SB Acoustics lists

LF · Primary · 8″

BL: 7.7T·m
Fs: 34Hz
Le: 0.84mH
Re: 5.6Ω
Sd: 216cm²
Cms: 1mm/N
Mms: 21g
Qes: 0.43
Qms: 2.7
Qts: 0.37
SPL: 89.8dB
Vas: 66.2L
Xmax: 5.7mm
Power: 50W
Impedance: 8Ω
Flux density: 1.20T
Sensitivity: 90.5dB
Calculated sensitivity †: 89.8dB
Manufacturer sensitivity: 90.5dB
Voice coil: 31mm
Weight: 1.4kg

Compare

Same-size drivers, compared with the SB20PFC30-8. Clear differences are green when better and red when worse.

This driverSB20PFC30-8

Best price

£35.60

34 Hz

Qts

0.37

Vas

66.2 L

7.7 T·m

Xmax

5.7 mm

Sensitivity

89.8 dB

Power

50 W

SB AcousticsSB20PFCR30-8

£33.48 · 6% less

Fs34 Hz –

Qts0.37 –

Vas66.2 L –

BL7.7 T·m –

Xmax11.5 mm +104%

Sensitivity89.8 dB –

SB AcousticsSB20PFC30-4

£35.60 · Same price

Fs34 Hz –

Qts0.33 −11%

Vas66.2 L –

BL6.6 T·m −14%

Xmax5.8 mm –

Sensitivity90.4 dB +0.6

Dayton AudioSD215A-88

£50.81 · 43% more

Fs31 Hz −9%

Qts0.39 +5%

Vas38.2 L −42%

BL7.7 T·m –

Xmax6 mm +6%

Sensitivity86.1 dB −3.7

VisatonW 200 S - 4 OHM

£60.14 · 69% more

Fs29 Hz −15%

Qts0.35 −5%

Vas65 L –

BL7.7 T·m –

Xmax10 mm +77%

Sensitivity88.2 dB −1.6

HiViC8

£62.01 · 74% more

Fs35 Hz –

Qts0.36 –

Vas56.1 L −15%

BL9.8 T·m +27%

Xmax5.9 mm +4%

Sensitivity89.6 dB –

REDCATT8FR

£66.91 · 88% more

Fs53 Hz +56%

Qts0.38 –

Vas36.8 L −44%

BL7.9 T·m –

Xmax5.8 mm –

Sensitivity93.4 dB +3.6

Dayton AudioRS225P-4A

£68.06 · 91% more

Fs38 Hz +11%

Qts0.38 –

Vas45.8 L −31%

BL6.4 T·m −17%

Xmax6 mm +6%

Sensitivity89.1 dB −0.7

HiViE8

£71.85 · 102% more

Fs34 Hz –

Qts0.37 –

Vas49.8 L −25%

BL9.9 T·m +29%

Xmax5.9 mm +4%

Sensitivity88.6 dB −1.2

Scanspeak22W/8534G00

£85.75 · 141% more

Fs30 Hz −12%

Qts0.39 +5%

Vas94.2 L +42%

BL7.8 T·m –

Xmax5.8 mm –

Sensitivity89.7 dB –

Dayton AudioRS225P-8A

£88.96 · 150% more

Fs32 Hz −7%

Qts0.34 −8%

Vas68.8 L +4%

BL8.5 T·m +10%

Xmax7 mm +24%

Sensitivity88.8 dB −1

SB AcousticsSB23NACS45-8

£89.65 · 152% more

Fs25 Hz −26%

Qts0.37 –

Vas94 L +42%

BL7.9 T·m –

Xmax6.5 mm +15%

Sensitivity87.7 dB −2.1

MonacorSPH-220HQ

£105.95 · 198% more

Fs30 Hz −12%

Qts0.40 +8%

Vas80 L +21%

BL7.6 T·m –

Xmax5.5 mm –

Sensitivity88.7 dB −1.1

WavecorWF182BD12

£119.52 · 236% more

Fs30 Hz −13%

Qts0.37 –

Vas32.4 L −51%

BL8.2 T·m +6%

Xmax5.5 mm –

Sensitivity85.4 dB −4.4

Scanspeak18W/8535-01

£145.25 · 308% more

Fs25 Hz −26%

Qts0.38 –

Vas68.9 L +4%

BL5.9 T·m −23%

Xmax5 mm −12%

Sensitivity85.7 dB −4.1

Dayton AudioPM220-8

£151.72 · 326% more

Fs49 Hz +44%

Qts0.38 –

Vas63 L −5%

BL7.2 T·m −6%

Xmax4.6 mm −19%

Sensitivity94.6 dB +4.8

MarkaudioMA200-M MULTI

£156.00 · 338% more

Fs33 Hz –

Qts0.35 −7%

Vas65.2 L –

BL8.5 T·m +11%

Xmax9 mm +59%

Sensitivity89.6 dB –

Scanspeak18W/8531G00

£168.81 · 374% more

Fs28 Hz −18%

Qts0.36 –

Vas58.2 L −12%

BL6.8 T·m −12%

Xmax6.5 mm +15%

Sensitivity87.2 dB −2.6

ETON8-512/C8/32 HEX

£186.43 · 424% more

Fs27 Hz −21%

Qts0.40 +8%

Vas102 L +54%

BL7.8 T·m –

Xmax5.5 mm –

Sensitivity88.7 dB −1.1

WavecorWF182BD20

£190.71 · 436% more

Fs30 Hz −13%

Qts0.37 –

Vas32.4 L −51%

BL8.2 T·m +6%

Xmax5.5 mm –

Sensitivity85.4 dB −4.4

SB AcousticsWO24P-4

£198.34 · 457% more

Fs28 Hz −18%

Qts0.40 +8%

Vas71 L +7%

BL7.6 T·m –

Xmax17 mm +201%

Sensitivity87.7 dB −2.1

WavecorWF223BD01

£207.92 · 484% more

Fs33 Hz −4%

Qts0.39 +5%

Vas45 L −32%

BL7.7 T·m –

Xmax6.5 mm +15%

Sensitivity87.9 dB −1.9

AccutonC220-6-221

£508.52 · 1328% more

Fs26 Hz −23%

Qts0.40 +8%

Vas86.2 L +30%

BL8.7 T·m +13%

Xmax5 mm −12%

Sensitivity87.8 dB −2

PurifiPTT8.0X04-NAB-01

£593.28 · 1567% more

Fs26 Hz −24%

Qts0.36 –

Vas70.4 L +6%

BL8 T·m +4%

Xmax9.3 mm +65%

Sensitivity87.2 dB −2.6

RS SpeakersW 220.50 FIBONACCI

No current price

Fs33 Hz –

Qts0.36 –

Vas55.6 L −16%

BL8.6 T·m +12%

Xmax6 mm +6%

Sensitivity89.3 dB −0.5

MarkaudioMA200-P MICA

No current price

Fs39 Hz +15%

Qts0.37 –

Vas66.5 L –

BL7.0 T·m −9%

Xmax7 mm +24%

Sensitivity91.5 dB +1.7

HiViS8-98R

No current price

Fs33 Hz –

Qts0.42 +14%

Vas65.2 L –

BL6.9 T·m −10%

Xmax6 mm +6%

Sensitivity89 dB −0.8

SB AcousticsMW19PF-8

No current price

Fs30 Hz −12%

Qts0.34 −8%

Vas63 L −5%

BL7 T·m −9%

Xmax6.5 mm +15%

Sensitivity88.7 dB −1.1

HiViSS8II

No current price

Fs32 Hz −6%

Qts0.32 −14%

Vas61.6 L −7%

BL8.5 T·m +10%

Xmax5.8 mm –

Sensitivity89.8 dB –

HiViSS8

No current price

Fs30 Hz −12%

Qts0.33 −11%

Vas83.3 L +26%

BL6.8 T·m −12%

Xmax6 mm +6%

Sensitivity89.6 dB –

HiViSS8R

No current price

Fs30 Hz −12%

Qts0.35 −5%

Vas92.9 L +40%

BL6.6 T·m −14%

Xmax6 mm +6%

Sensitivity90 dB –

Search similar

Tune the match

Choose the published values that matter to your design. Size stays matched to this driver.

Qts

Qes

Vas

Xmax

Reviews

How reviews work

5.0 out of 5

from 1 rating at 1 shop

SoundImports5.0 out of 51 rating · Checked 12 Oct 2026
Read reviews on SoundImports

Each shop collects its own ratings. Bits shows them as published and doesn't verify them.

Where to buy

Prices for delivery to the UK, including VAT. How prices work

Watch price

Shop	Price	Against the lowest	Stock	Link
RumoH Checked 12 Oct 2026 · Ships from Netherlands · 8 Ω · Source: inc VAT Import VAT and duty may apply	£35.60, the lowest price		Stock not listed	Visit shop at RumoH
SoundImports Checked 12 Oct 2026 · Ships from Netherlands · 8 Ω · Source: inc VAT Import VAT and duty may apply	£36.40	2.3% above the lowest price	29 in stock	Visit shop at SoundImports

Best price over time

Tracked since 1 Apr

bits00 AUDIO

8-inch LF driver · SB20 series · 31 mm voice coil · 50 W

SB Acoustics SB20PFC30-8 8Ω

8 Ω

1 rating at 1 shop

£35.60

2.2%

RumoH · Ships from Netherlands · All 2 offers

Open in 00 Simulator

Fs: 34Hz
Xmax: 5.7mm
SPL: 90dB
Pe: 50W
BL: 7.7T·m
Vd: 122cm³
Qts: 0.37
Vas: 66L

See all 21 specs

Specifications

Published by SB Acoustics

Manufacturer page

Datasheet PDF

The published T/S values agree with each other

Thiele/Small

Fs: 34Hz
Qts: 0.37
Qes: 0.43
Qms: 2.7
Vas: 66.2L
Re: 5.6Ω
Le: 0.84mH

Motor and cone

BL: 7.7T·m
Sd: 216cm²
Mms: 21g
Xmax: 5.7mm
Vd †: 122cm³
Voice coil: 31mm
Flux density: 1.20T

Power and response

Sensitivity †: 89.8dB
Manufacturer sensitivity: 90.5dB
Power: 50W
Impedance: 8Ω
EBP †: 79 · Sealed or vented

Size and mounting

Weight: 1.4kg

Other published values

Cms: 1mm/N

† Calculated by bits from the published values

What this validation status means

Everything else SB Acoustics lists

LF · Primary · 8″

BL: 7.7T·m
Fs: 34Hz
Le: 0.84mH
Re: 5.6Ω
Sd: 216cm²
Cms: 1mm/N
Mms: 21g
Qes: 0.43
Qms: 2.7
Qts: 0.37
SPL: 89.8dB
Vas: 66.2L
Xmax: 5.7mm
Power: 50W
Impedance: 8Ω
Flux density: 1.20T
Sensitivity: 90.5dB
Calculated sensitivity †: 89.8dB
Manufacturer sensitivity: 90.5dB
Voice coil: 31mm
Weight: 1.4kg

Compare

Same-size drivers, compared with the SB20PFC30-8. Clear differences are green when better and red when worse.

This driverSB20PFC30-8

Best price

£35.60

34 Hz

Qts

0.37

Vas

66.2 L

7.7 T·m

Xmax

5.7 mm

Sensitivity

89.8 dB

Power

50 W

SB AcousticsSB20PFCR30-8

£33.48 · 6% less

Fs34 Hz –

Qts0.37 –

Vas66.2 L –

BL7.7 T·m –

Xmax11.5 mm +104%

Sensitivity89.8 dB –

SB AcousticsSB20PFC30-4

£35.60 · Same price

Fs34 Hz –

Qts0.33 −11%

Vas66.2 L –

BL6.6 T·m −14%

Xmax5.8 mm –

Sensitivity90.4 dB +0.6

Dayton AudioSD215A-88

£50.81 · 43% more

Fs31 Hz −9%

Qts0.39 +5%

Vas38.2 L −42%

BL7.7 T·m –

Xmax6 mm +6%

Sensitivity86.1 dB −3.7

VisatonW 200 S - 4 OHM

£60.14 · 69% more

Fs29 Hz −15%

Qts0.35 −5%

Vas65 L –

BL7.7 T·m –

Xmax10 mm +77%

Sensitivity88.2 dB −1.6

HiViC8

£62.01 · 74% more

Fs35 Hz –

Qts0.36 –

Vas56.1 L −15%

BL9.8 T·m +27%

Xmax5.9 mm +4%

Sensitivity89.6 dB –

REDCATT8FR

£66.91 · 88% more

Fs53 Hz +56%

Qts0.38 –

Vas36.8 L −44%

BL7.9 T·m –

Xmax5.8 mm –

Sensitivity93.4 dB +3.6

Dayton AudioRS225P-4A

£68.06 · 91% more

Fs38 Hz +11%

Qts0.38 –

Vas45.8 L −31%

BL6.4 T·m −17%

Xmax6 mm +6%

Sensitivity89.1 dB −0.7

HiViE8

£71.85 · 102% more

Fs34 Hz –

Qts0.37 –

Vas49.8 L −25%

BL9.9 T·m +29%

Xmax5.9 mm +4%

Sensitivity88.6 dB −1.2

Scanspeak22W/8534G00

£85.75 · 141% more

Fs30 Hz −12%

Qts0.39 +5%

Vas94.2 L +42%

BL7.8 T·m –

Xmax5.8 mm –

Sensitivity89.7 dB –

Dayton AudioRS225P-8A

£88.96 · 150% more

Fs32 Hz −7%

Qts0.34 −8%

Vas68.8 L +4%

BL8.5 T·m +10%

Xmax7 mm +24%

Sensitivity88.8 dB −1

SB AcousticsSB23NACS45-8

£89.65 · 152% more

Fs25 Hz −26%

Qts0.37 –

Vas94 L +42%

BL7.9 T·m –

Xmax6.5 mm +15%

Sensitivity87.7 dB −2.1

MonacorSPH-220HQ

£105.95 · 198% more

Fs30 Hz −12%

Qts0.40 +8%

Vas80 L +21%

BL7.6 T·m –

Xmax5.5 mm –

Sensitivity88.7 dB −1.1

WavecorWF182BD12

£119.52 · 236% more

Fs30 Hz −13%

Qts0.37 –

Vas32.4 L −51%

BL8.2 T·m +6%

Xmax5.5 mm –

Sensitivity85.4 dB −4.4

Scanspeak18W/8535-01

£145.25 · 308% more

Fs25 Hz −26%

Qts0.38 –

Vas68.9 L +4%

BL5.9 T·m −23%

Xmax5 mm −12%

Sensitivity85.7 dB −4.1

Dayton AudioPM220-8

£151.72 · 326% more

Fs49 Hz +44%

Qts0.38 –

Vas63 L −5%

BL7.2 T·m −6%

Xmax4.6 mm −19%

Sensitivity94.6 dB +4.8

MarkaudioMA200-M MULTI

£156.00 · 338% more

Fs33 Hz –

Qts0.35 −7%

Vas65.2 L –

BL8.5 T·m +11%

Xmax9 mm +59%

Sensitivity89.6 dB –

Scanspeak18W/8531G00

£168.81 · 374% more

Fs28 Hz −18%

Qts0.36 –

Vas58.2 L −12%

BL6.8 T·m −12%

Xmax6.5 mm +15%

Sensitivity87.2 dB −2.6

ETON8-512/C8/32 HEX

£186.43 · 424% more

Fs27 Hz −21%

Qts0.40 +8%

Vas102 L +54%

BL7.8 T·m –

Xmax5.5 mm –

Sensitivity88.7 dB −1.1

WavecorWF182BD20

£190.71 · 436% more

Fs30 Hz −13%

Qts0.37 –

Vas32.4 L −51%

BL8.2 T·m +6%

Xmax5.5 mm –

Sensitivity85.4 dB −4.4

SB AcousticsWO24P-4

£198.34 · 457% more

Fs28 Hz −18%

Qts0.40 +8%

Vas71 L +7%

BL7.6 T·m –

Xmax17 mm +201%

Sensitivity87.7 dB −2.1

WavecorWF223BD01

£207.92 · 484% more

Fs33 Hz −4%

Qts0.39 +5%

Vas45 L −32%

BL7.7 T·m –

Xmax6.5 mm +15%

Sensitivity87.9 dB −1.9

AccutonC220-6-221

£508.52 · 1328% more

Fs26 Hz −23%

Qts0.40 +8%

Vas86.2 L +30%

BL8.7 T·m +13%

Xmax5 mm −12%

Sensitivity87.8 dB −2

PurifiPTT8.0X04-NAB-01

£593.28 · 1567% more

Fs26 Hz −24%

Qts0.36 –

Vas70.4 L +6%

BL8 T·m +4%

Xmax9.3 mm +65%

Sensitivity87.2 dB −2.6

RS SpeakersW 220.50 FIBONACCI

No current price

Fs33 Hz –

Qts0.36 –

Vas55.6 L −16%

BL8.6 T·m +12%

Xmax6 mm +6%

Sensitivity89.3 dB −0.5

MarkaudioMA200-P MICA

No current price

Fs39 Hz +15%

Qts0.37 –

Vas66.5 L –

BL7.0 T·m −9%

Xmax7 mm +24%

Sensitivity91.5 dB +1.7

HiViS8-98R

No current price

Fs33 Hz –

Qts0.42 +14%

Vas65.2 L –

BL6.9 T·m −10%

Xmax6 mm +6%

Sensitivity89 dB −0.8

SB AcousticsMW19PF-8

No current price

Fs30 Hz −12%

Qts0.34 −8%

Vas63 L −5%

BL7 T·m −9%

Xmax6.5 mm +15%

Sensitivity88.7 dB −1.1

HiViSS8II

No current price

Fs32 Hz −6%

Qts0.32 −14%

Vas61.6 L −7%

BL8.5 T·m +10%

Xmax5.8 mm –

Sensitivity89.8 dB –

HiViSS8

No current price

Fs30 Hz −12%

Qts0.33 −11%

Vas83.3 L +26%

BL6.8 T·m −12%

Xmax6 mm +6%

Sensitivity89.6 dB –

HiViSS8R

No current price

Fs30 Hz −12%

Qts0.35 −5%

Vas92.9 L +40%

BL6.6 T·m −14%

Xmax6 mm +6%

Sensitivity90 dB –

Search similar

Tune the match

Choose the published values that matter to your design. Size stays matched to this driver.

Qts

Qes

Vas

Xmax

Reviews

How reviews work

5.0 out of 5

from 1 rating at 1 shop

SoundImports5.0 out of 51 rating · Checked 12 Oct 2026
Read reviews on SoundImports

Each shop collects its own ratings. Bits shows them as published and doesn't verify them.

Where to buy

Prices for delivery to the UK, including VAT. How prices work

Watch price

Shop	Price	Against the lowest	Stock	Link
RumoH Checked 12 Oct 2026 · Ships from Netherlands · 8 Ω · Source: inc VAT Import VAT and duty may apply	£35.60, the lowest price		Stock not listed	Visit shop at RumoH
SoundImports Checked 12 Oct 2026 · Ships from Netherlands · 8 Ω · Source: inc VAT Import VAT and duty may apply	£36.40	2.3% above the lowest price	29 in stock	Visit shop at SoundImports

Best price over time

Tracked since 1 Apr