SB AcousticsSB20PFC30-8
£35.48 · 47% less, betterFs34 Hz −36%, better
Qts0.37 –
Vas66.2 L +80%, worse
BL7.7 T·m –
Xmax5.7 mm –
Sensitivity89.8 dB −3.6, worse
8-inch LF driver · 41 mm voice coil · 30 W
REDCATT 8FR 4Ω
4 Ω
No price for delivery to the UK
- Fs
- 53Hz
- Xmax
- 5.8mm
- SPL
- 93dB
- Pe
- 30W
- BL
- 7.9T·m
- Vd
- 124cm³
- Qts
- 0.38
- Vas
- 37L
REDCATT 8FR is an 8-inch 4 ohm LF driver rated at 30 W RMS. The validated T/S data includes Fs 53 Hz, Qts 0.38, Vas 36.8 L, Xmax 5.8 mm, sensitivity 93.4 dB, plus 124 cm³ Vd and 134 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 £66.69.
The published T/S values agree with each other
Thiele/Small
- Fs
- 53Hz
- Qts
- 0.38
- Qes
- 0.40
- Qms
- 8.5
- Vas
- 36.8L
- Re
- 3.8Ω
- Le
- 0.08mH
Motor and cone
- BL
- 7.9T·m
- Sd
- 214cm²
- Mms
- 18g
- Xmax
- 5.8mm
- Vd †
- 124cm³
- Voice coil
- 41mm
Power and response
- Sensitivity †
- 93.4dB
- Manufacturer sensitivity
- 93dB
- Power
- 30W
- Impedance
- 4Ω
- EBP †
- 134 · Leans vented
Size and mounting
- Diameter
- 210mm
- Cutout
- 186.9mm
- Bolt circle
- 195.5mm
- Weight
- 2.5kg
Other published values
- Xmech
- 11.8
- Power Peak
- 120
Other dimensions
- Mounting Depth
- 91.8
† Calculated by bits from the published values
What this validation status means
Everything else REDCATT lists
LF · Primary · 8″
- BL
- 7.9T·m
- Fs
- 53Hz
- Le
- 0.08mH
- Re
- 3.8Ω
- Sd
- 214cm²
- Mms
- 18g
- Qes
- 0.40
- Qms
- 8.5
- Qts
- 0.38
- SPL
- 93.4dB
- Vas
- 36.8L
- Xmax
- 5.8mm
- Xmech
- 11.8
- Power
- 30W
- Impedance
- 4Ω
- Power Peak
- 120
- Sensitivity
- 93dB
- Calculated sensitivity †
- 93.4dB
- Manufacturer sensitivity
- 93dB
- Voice coil
- 41mm
- Weight
- 2.5kg
- Diameter
- 210mm
- Mounting Depth
- 91.8
- Cutout
- 186.9mm
- Bolt circle
- 195.5mm
02
Compare
Same-size drivers, compared with the 8FR. Clear differences are green when better and red when worse.
This driver8FR
Best price
£66.69
Fs
53 Hz
Qts
0.38
Vas
36.8 L
BL
7.9 T·m
Xmax
5.8 mm
Sensitivity
93.4 dB
Power
30 W
Dayton AudioSIG180-4
£41.54 · 38% less, betterFs41 Hz −24%, better
Qts0.38 –
Vas23.2 L −37%, better
BL6.6 T·m −16%, worse
Xmax5 mm −14%, worse
Sensitivity87.8 dB −5.6, worse
Dayton AudioDA215-8
£42.30 · 37% less, betterFs35 Hz −34%, better
Qts0.37 –
Vas42.7 L +16%, worse
BL10 T·m +27%, better
Xmax5.3 mm −9%
Sensitivity88.1 dB −5.3, worse
Dayton AudioSD215A-88
£50.65 · 24% less, betterFs31 Hz −42%, better
Qts0.39 +3%
Vas38.2 L +4%
BL7.7 T·m –
Xmax6 mm +3%
Sensitivity86.1 dB −7.3, worse
Dayton AudioDSA215-8
£56.65 · 15% less, betterFs35 Hz −34%, better
Qts0.33 −13%, better
Vas37.4 L –
BL10.6 T·m +35%, better
Xmax5.5 mm −5%
Sensitivity88.1 dB −5.3, worse
Dayton AudioRS180-8
£60.43 · 9% less, betterFs36 Hz −33%, better
Qts0.31 −18%, better
Vas24.4 L −34%, better
BL7.8 T·m –
Xmax6 mm +3%
Sensitivity86.3 dB −7.1, worse
Dayton AudioRS180P-8
£60.43 · 9% less, betterFs46 Hz −14%, better
Qts0.34 −10%, better
Vas22 L −40%, better
BL7.2 T·m −9%
Xmax6 mm +3%
Sensitivity88.8 dB −4.6, worse
Dayton AudioRS225P-4A
£67.99 · 2% moreFs38 Hz −29%, better
Qts0.38 –
Vas45.8 L +24%, worse
BL6.4 T·m −19%, worse
Xmax6 mm +3%
Sensitivity89.1 dB −4.3, worse
HiViE8
£71.76 · 8% more, worseFs34 Hz −36%, better
Qts0.37 –
Vas49.8 L +35%, worse
BL9.9 T·m +26%, better
Xmax5.9 mm –
Sensitivity88.6 dB −4.8, worse
Dayton AudioRS180S-8
£79.33 · 19% more, worseFs38 Hz −29%, better
Qts0.36 −5%
Vas23 L −37%, better
BL7.3 T·m −7%
Xmax6 mm +3%
Sensitivity86 dB −7.4, worse
REDCATT8FHM
£84.44 · 27% more, worseFs38 Hz −28%, better
Qts0.39 +3%
Vas32.1 L −13%, better
BL8.2 T·m +4%
Xmax5 mm −14%, worse
Sensitivity88.4 dB −5, worse
Scanspeak22W/8534G00
£85.75 · 29% more, worseFs30 Hz −43%, better
Qts0.39 +3%
Vas94.2 L +156%, worse
BL7.8 T·m –
Xmax5.8 mm –
Sensitivity89.7 dB −3.7, worse
SB AcousticsSB23NACS45-8
£89.36 · 34% more, worseFs25 Hz −53%, better
Qts0.37 –
Vas94 L +155%, worse
BL7.9 T·m –
Xmax6.5 mm +12%, better
Sensitivity87.7 dB −5.7, worse
Eighteen Sound8MB500
£98.84 · 48% more, worseFs73 Hz +38%, worse
Qts0.36 −5%
Vas18.4 L −50%, better
BL7.2 T·m −8%
Xmax6 mm +3%
Sensitivity94.3 dB +0.9
WavecorWF182BD12
£119.38 · 79% more, worseFs30 Hz −44%, better
Qts0.37 –
Vas32.4 L −12%, better
BL8.2 T·m +4%
Xmax5.5 mm −5%
Sensitivity85.4 dB −8, worse
Eighteen Sound8NMB420
£121.21 · 82% more, worseFs59 Hz +11%, worse
Qts0.31 −18%, better
Vas31 L −16%, better
BL7 T·m −11%, worse
Xmax5.8 mm –
Sensitivity94.8 dB +1.4
WavecorWF182BD17
£123.16 · 85% more, worseFs33 Hz −38%, better
Qts0.35 −7%
Vas24.3 L −34%, better
BL6.5 T·m −17%, worse
Xmax5.5 mm −5%
Sensitivity85.8 dB −7.6, worse
ETON8-512/C8/32 HEX
£185.82 · 179% more, worseFs27 Hz −49%, better
Qts0.40 +6%
Vas102 L +177%, worse
BL7.8 T·m –
Xmax5.5 mm −5%
Sensitivity88.7 dB −4.7, worse
WavecorWF182BD20
£190.08 · 185% more, worseFs30 Hz −44%, better
Qts0.37 –
Vas32.4 L −12%, better
BL8.2 T·m +4%
Xmax5.5 mm −5%
Sensitivity85.4 dB −8, worse
Eighteen Sound8CX401F
£199.68 · 199% more, worseFs56 Hz +6%
Qts0.34 −10%, better
Vas23.9 L −35%, better
BL9.3 T·m +18%, better
Xmax5.8 mm –
Sensitivity92.5 dB −0.9
WavecorWF223BD01
£207.23 · 211% more, worseFs33 Hz −38%, better
Qts0.39 +3%
Vas45 L +22%, worse
BL7.7 T·m –
Xmax6.5 mm +12%, better
Sensitivity87.9 dB −5.5, worse
Scanspeak18WU/8747T00
£287.19 · 331% more, worseFs36 Hz −32%, better
Qts0.38 –
Vas36.2 L –
BL7.4 T·m −6%
Xmax9 mm +55%, better
Sensitivity88 dB −5.4, worse
Scanspeak18WU/8741T00
£303.37 · 355% more, worseFs35 Hz −34%, better
Qts0.39 +3%
Vas37.1 L –
BL7.3 T·m −7%
Xmax9 mm +55%, better
Sensitivity87.6 dB −5.8, worse
AccutonS220-6-221
£448.59 · 573% more, worseFs22 Hz −58%, better
Qts0.37 –
Vas112.9 L +207%, worse
BL8.3 T·m +5%
Xmax5 mm −14%, worse
Sensitivity87 dB −6.4, worse
Eighteen Sound8MB400
No current priceFs64 Hz +21%, worse
Qts0.38 –
Vas23.9 L −35%, better
BL9.3 T·m +18%, better
Xmax5.8 mm –
Sensitivity93.7 dB –
RS SpeakersW 220.50 FIBONACCI
No current priceFs33 Hz −37%, better
Qts0.36 −5%
Vas55.6 L +51%, worse
BL8.6 T·m +9%
Xmax6 mm +3%
Sensitivity89.3 dB −4.1, worse
WavecorWF182BD11
No current priceFs34 Hz −36%, better
Qts0.42 +11%, worse
Vas24.3 L −34%, better
BL8.2 T·m +4%
Xmax5.5 mm −5%
Sensitivity85.4 dB −8, worse
WavecorWF182BD19
No current priceFs34 Hz −36%, better
Qts0.42 +11%, worse
Vas24.3 L −34%, better
BL8.2 T·m +4%
Xmax5.5 mm −5%
Sensitivity85.4 dB −8, worse
WavecorWF182BD07
No current priceFs40 Hz −25%, better
Qts0.34 −10%, better
Vas24.4 L −34%, better
BL8.5 T·m +8%
Xmax5.5 mm −5%
Sensitivity88.5 dB −4.9, worse
WavecorWF182BD09
No current priceFs33 Hz −38%, better
Qts0.35 −7%
Vas24.3 L −34%, better
BL6.5 T·m −17%, worse
Xmax5.5 mm −5%
Sensitivity85.8 dB −7.6, worse
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
None of the shops we track lists delivery to the UK at checkout.