GRS8PT-8
£24.93 · 14% less, betterFs59 Hz +51%, worse
Qts0.55 +6%
Vas20.1 L −6%
BL10.2 T·m +24%, better
Xmax6.5 mm +7%
Sensitivity90.5 dB +5, better
8-inch LF driver · 36 mm voice coil · 100 W
REDCATT 81FHW 4Ω
4 Ω
£29.03
Lautsprecherteile · 5 in stock · All 1 offer
- Fs
- 39Hz
- Xmax
- 6.1mm
- SPL
- 86dB
- Pe
- 100W
- BL
- 8.3T·m
- Vd
- 123cm³
- Qts
- 0.52
- Vas
- 22L
REDCATT 81FHW is an 8-inch 4 ohm LF driver rated at 100 W RMS. The validated T/S data includes Fs 39 Hz, Qts 0.52, Vas 21.5 L, Xmax 6.1 mm, sensitivity 85.5 dB, plus 123 cm³ Vd and 67 EBP. bits tracks UK vendor pricing, price movement, datasheet links, simulator import data, and similar drivers, with a current best price of £29.03.
The published T/S values agree with each other
Thiele/Small
- Fs
- 39Hz
- Qts
- 0.52
- Qes
- 0.58
- Qms
- 5.4
- Vas
- 21.5L
- Re
- 3.6Ω
- Le
- 1.12mH
Motor and cone
- BL
- 8.3T·m
- Sd
- 201cm²
- Mms
- 44g
- Xmax
- 6.1mm
- Vd †
- 123cm³
- Voice coil
- 36mm
Power and response
- Sensitivity †
- 85.5dB
- Manufacturer sensitivity
- 85.9dB
- Power
- 100W
- Impedance
- 4Ω
- EBP †
- 67 · Sealed or vented
Size and mounting
- Diameter
- 209mm
- Cutout
- 180mm
- Bolt circle
- 197mm
- Weight
- 1.7kg
Other published values
- Xmech
- 12.1
- Power Peak
- 400
Other dimensions
- Mounting Depth
- 95
† Calculated by bits from the published values
What this validation status means
Everything else REDCATT lists
LF · Primary · 8″
- BL
- 8.3T·m
- Fs
- 39Hz
- Le
- 1.12mH
- Re
- 3.6Ω
- Sd
- 201cm²
- Mms
- 44g
- Qes
- 0.58
- Qms
- 5.4
- Qts
- 0.52
- SPL
- 85.5dB
- Vas
- 21.5L
- Xmax
- 6.1mm
- Xmech
- 12.1
- Power
- 100W
- Impedance
- 4Ω
- Power Peak
- 400
- Sensitivity
- 85.9dB
- Calculated sensitivity †
- 85.5dB
- Manufacturer sensitivity
- 85.9dB
- Voice coil
- 36mm
- Weight
- 1.7kg
- Diameter
- 209mm
- Mounting Depth
- 95
- Cutout
- 180mm
- Bolt circle
- 197mm
02
Compare
Same-size drivers, compared with the 81FHW. Clear differences are green when better and red when worse.
This driver81FHW
Best price
£29.03
Fs
39 Hz
Qts
0.52
Vas
21.5 L
BL
8.3 T·m
Xmax
6.1 mm
Sensitivity
85.5 dB
Power
100 W
Dayton AudioPCS8-4
£30.21 · 4% moreFs43 Hz +10%, worse
Qts0.49 −6%
Vas20.5 L −5%
BL8.4 T·m –
Xmax5 mm −18%, worse
Sensitivity86.7 dB +1.2
GRS8SMP-8
£30.22 · 4% moreFs41 Hz +5%
Qts0.46 −12%, better
Vas32.5 L +51%, worse
BL8.9 T·m +8%
Xmax5.5 mm −10%
Sensitivity88.1 dB +2.6, better
SB AudienceBIANCO-8MW125
£37.54 · 29% more, worseFs89 Hz +128%, worse
Qts0.55 +6%
Vas10.1 L −53%, better
BL11.3 T·m +37%, better
Xmax6.4 mm +5%
Sensitivity93 dB +7.5, better
Beyma8CMV2
£44.94 · 55% more, worseFs75 Hz +92%, worse
Qts0.52 –
Vas14.6 L −32%, better
BL9.6 T·m +16%, better
Xmax5.7 mm −7%
Sensitivity92.5 dB +7, better
Dayton AudioPA200-8
£45.32 · 56% more, worseFs55 Hz +42%, worse
Qts0.48 −8%
Vas26.6 L +24%, worse
BL9.3 T·m +12%, better
Xmax3 mm −51%, worse
Sensitivity91.5 dB +6, better
FaitalPROW8N8-150
£55.00 · 89% more, worseFs76 Hz +95%, worse
Qts0.52 –
Vas14.4 L −33%, better
BL9.9 T·m +20%, better
Xmax5.5 mm −10%
Sensitivity92.3 dB +6.8, better
FaitalPRO8FE400
£59.72 · 106% more, worseFs100 Hz +156%, worse
Qts0.48 −8%
Vas9.9 L −54%, better
BL8.8 T·m +7%
Xmax4.9 mm −20%, worse
Sensitivity94.7 dB +9.2, better
Dayton AudioRS180P-8
£60.44 · 108% more, worseFs46 Hz +17%, worse
Qts0.34 −35%, better
Vas22 L –
BL7.2 T·m −13%, worse
Xmax6 mm –
Sensitivity88.8 dB +3.3, better
Dayton AudioRS180-8
£60.44 · 108% more, worseFs36 Hz −8%
Qts0.31 −40%, better
Vas24.4 L +13%, worse
BL7.8 T·m −5%
Xmax6 mm –
Sensitivity86.3 dB +0.8
Dayton AudioRS180-4
£70.95 · 144% more, worseFs38 Hz –
Qts0.46 −12%, better
Vas21.2 L –
BL4.7 T·m −43%, worse
Xmax6 mm –
Sensitivity85.1 dB –
B&C8CL51
£86.23 · 197% more, worseFs83 Hz +113%, worse
Qts0.51 –
Vas9.5 L −56%, better
BL16.1 T·m +95%, better
Xmax6 mm –
Sensitivity92.1 dB +6.6, better
Dayton AudioRS180S-8
£93.83 · 223% more, worseFs38 Hz −3%
Qts0.36 −31%, better
Vas23 L +7%
BL7.3 T·m −12%, worse
Xmax6 mm –
Sensitivity86 dB +0.5
B&C8NDL51
£100.74 · 247% more, worseFs75 Hz +92%, worse
Qts0.57 +10%
Vas10.1 L −53%, better
BL7.3 T·m −12%, worse
Xmax7 mm +15%, better
Sensitivity90.3 dB +4.8, better
Eighteen Sound8MB500
£121.75 · 319% more, worseFs73 Hz +87%, worse
Qts0.36 −31%, better
Vas18.4 L −14%, better
BL7.2 T·m −13%, worse
Xmax6 mm –
Sensitivity94.3 dB +8.8, better
FaitalPRO8PR150
£136.56 · 370% more, worseFs75 Hz +92%, worse
Qts0.48 −8%
Vas16.2 L −25%, better
BL10.4 T·m +26%, better
Xmax5 mm −18%, worse
Sensitivity93.1 dB +7.6, better
Dayton AudioRSS210HF-4
£147.53 · 408% more, worseFs30 Hz −24%, better
Qts0.57 +10%
Vas23.7 L +10%, worse
BL8.1 T·m –
Xmax9 mm +48%, better
Sensitivity81.5 dB −4, worse
WavecorSW215WA01
£149.32 · 414% more, worseFs33 Hz −15%, better
Qts0.49 −6%
Vas26 L +21%, worse
BL8.4 T·m –
Xmax10 mm +64%, better
Sensitivity84.7 dB −0.8
CelestionTF0815RE
No current priceFs65 Hz +66%, worse
Qts0.53 –
Vas22.1 L –
BL8.9 T·m +8%
Xmax5.3 mm −14%, worse
Sensitivity91.7 dB +6.2, better
PRV Audio8MR400
No current priceFs78 Hz +101%, worse
Qts0.52 –
Vas20.2 L −6%
BL8.2 T·m –
Xmax4 mm −34%, worse
Sensitivity94.4 dB +8.9, better
No photo
PHL Audio2001
No current priceFs77 Hz +97%, worse
Qts0.53 –
Vas13.8 L −36%, better
BL9.5 T·m +15%, better
Xmax5.5 mm −10%
Sensitivity92.2 dB +6.7, better
No photo
PHL Audio2001NDU
No current priceFs77 Hz +97%, worse
Qts0.53 –
Vas13.8 L −36%, better
BL9.5 T·m +15%, better
Xmax5.5 mm −10%
Sensitivity92.2 dB +6.7, better
Beyma8CX300FE
No current priceFs89 Hz +128%, worse
Qts0.55 +6%
Vas10.8 L −50%, better
BL9.6 T·m +16%, better
Xmax6 mm –
Sensitivity92.9 dB +7.4, better
Sica8 H 1 CS
No current priceFs50 Hz +27%, worse
Qts0.54 +4%
Vas27.8 L +29%, worse
BL8.7 T·m +6%
Xmax4 mm −34%, worse
Sensitivity89.5 dB +4, better
WavecorWF182BD11
No current priceFs34 Hz −13%, better
Qts0.42 −19%, better
Vas24.3 L +13%, worse
BL8.2 T·m –
Xmax5.5 mm −10%
Sensitivity85.4 dB –
WavecorWF182BD19
No current priceFs34 Hz −13%, better
Qts0.42 −19%, better
Vas24.3 L +13%, worse
BL8.2 T·m –
Xmax5.5 mm −10%
Sensitivity85.4 dB –
Lii AudioFAST 6
No current priceFs63 Hz +61%, worse
Qts0.46 −13%, better
Vas22.9 L +7%
BL4.3 T·m −48%, worse
Xmax6 mm –
Sensitivity92.5 dB +7, better
LavoceNBASS08-20
No current priceFs55 Hz +41%, worse
Qts0.48 −8%
Vas18.4 L −14%, better
BL11.3 T·m +37%, better
Xmax6.5 mm +7%
Sensitivity89.9 dB +4.4, better
PRV Audio8MR500-NDY-4
No current priceFs79 Hz +101%, worse
Qts0.54 +4%
Vas24.3 L +13%, worse
BL6.0 T·m −27%, worse
Xmax3 mm −51%, worse
Sensitivity95.2 dB +9.7, better
Eighteen Sound8MB400
No current priceFs64 Hz +64%, worse
Qts0.38 −27%, better
Vas23.9 L +11%, worse
BL9.3 T·m +13%, better
Xmax5.8 mm −5%
Sensitivity93.7 dB +8.2, better
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
| Shop | Price | Against the lowest | Stock | Link |
|---|---|---|---|---|
Lautsprecherteile | £29.03, the lowest price | 5 in stock | Visit shop at Lautsprecherteile |
Best price over time
Tracked since 1 Oct