REDCATT4FR-1
£12.19 · 28% less, betterFs79 Hz –
Qts0.52 –
Vas1.8 L −8%
BL4.8 T·m +5%
Xmax2.8 mm +700%, better
Sensitivity83.7 dB −0.7
4-inch LF driver · 25 mm voice coil · 30 W
REDCATT 4FR-2 4Ω
4 Ω
£16.95
Lautsprecherteile · 12 in stock · All 1 offer
- Fs
- 80Hz
- Xmax
- 0.35mm
- SPL
- 84dB
- Pe
- 30W
- BL
- 4.6T·m
- Vd
- 2cm³
- Qts
- 0.51
- Vas
- 2L
REDCATT 4FR-2 is a 4-inch 4 ohm LF driver rated at 30 W RMS. The validated T/S data includes Fs 80 Hz, Qts 0.51, Vas 2.0 L, Xmax 0.35 mm, sensitivity 84.4 dB, plus 2 cm³ Vd and 138 EBP. bits tracks UK vendor pricing, price movement, datasheet links, simulator import data, and similar drivers, with a current best price of £16.95.
The published T/S values agree with each other
Thiele/Small
- Fs
- 80Hz
- Qts
- 0.51
- Qes
- 0.58
- Qms
- 4.2
- Vas
- 2.0L
- Re
- 3.3Ω
- Le
- 0.29mH
Motor and cone
- BL
- 4.6T·m
- Sd
- 50cm²
- Mms
- 7g
- Xmax
- 0.35mm
- Vd †
- 2cm³
- Voice coil
- 25mm
Power and response
- Sensitivity †
- 84.4dB
- Manufacturer sensitivity
- 85.1dB
- Power
- 30W
- Impedance
- 4Ω
- EBP †
- 138 · Leans vented
Size and mounting
- Diameter
- 116mm
- Cutout
- 94.5mm
- Bolt circle
- 109mm
- Weight
- 0.8kg
Other published values
- Xmech
- 4.65
- Power Peak
- 120
Other dimensions
- Mounting Depth
- 55.9
† Calculated by bits from the published values
What this validation status means
Everything else REDCATT lists
LF · Primary · 4″
- BL
- 4.6T·m
- Fs
- 80Hz
- Le
- 0.29mH
- Re
- 3.3Ω
- Sd
- 50cm²
- Mms
- 7g
- Qes
- 0.58
- Qms
- 4.2
- Qts
- 0.51
- SPL
- 84.4dB
- Vas
- 2.0L
- Xmax
- 0.35mm
- Xmech
- 4.65
- Power
- 30W
- Impedance
- 4Ω
- Power Peak
- 120
- Sensitivity
- 85.1dB
- Calculated sensitivity †
- 84.4dB
- Manufacturer sensitivity
- 85.1dB
- Voice coil
- 25mm
- Weight
- 0.8kg
- Diameter
- 116mm
- Mounting Depth
- 55.9
- Cutout
- 94.5mm
- Bolt circle
- 109mm
02
Compare
Same-size drivers, compared with the 4FR-2. Clear differences are green when better and red when worse.
This driver4FR-2
Best price
£16.95
Fs
80 Hz
Qts
0.51
Vas
2.0 L
BL
4.6 T·m
Xmax
0.35 mm
Sensitivity
84.4 dB
Power
30 W
PeerlessSDS-100F25CP09-04
£13.03 · 23% less, betterFs80 Hz –
Qts0.53 +4%
Vas2.0 L –
BL4.7 T·m +3%
Xmax5.0 mm +1343%, better
Sensitivity84.4 dB –
VisatonFRS 8 M
£13.19 · 22% less, betterFs125 Hz +56%, worse
Qts0.49 −4%
Vas1.1 L −44%, better
BL4 T·m −13%, worse
Xmax2.5 mm +614%, better
Sensitivity87.7 dB +3.3, better
VisatonFRS 8 M - 8 Ohm
£13.19 · 22% less, betterFs125 Hz +56%, worse
Qts0.49 −4%
Vas1.1 L −44%, better
BL4 T·m −13%, worse
Xmax2.5 mm +614%, better
Sensitivity87.7 dB +3.3, better
VisatonFR 10
£13.75 · 19% less, betterFs90 Hz +13%, worse
Qts0.54 +6%
Vas2.3 L +17%, worse
BL4.6 T·m –
Xmax4 mm +1043%, better
Sensitivity85.8 dB +1.4
Dayton AudioDS90-8
£16.61 · 2% lessFs81 Hz –
Qts0.43 −16%, better
Vas1.3 L −33%, better
BL4.8 T·m +4%
Xmax2.5 mm +614%, better
Sensitivity83.3 dB −1.1
Sica3.5 F 1 CS
£16.99 · Same priceFs107 Hz +34%, worse
Qts0.57 +12%, worse
Vas1.4 L −29%, better
BL4.2 T·m −8%
Xmax1.5 mm +329%, better
Sensitivity86.4 dB +2, better
Sica3.5 H 1 CS
£18.78 · 11% more, worseFs85 Hz +6%
Qts0.53 +4%
Vas1.8 L −8%
BL4.8 T·m +5%
Xmax2.5 mm +614%, better
Sensitivity84.9 dB +0.5
MonacorSPX-32M
£18.78 · 11% more, worseFs110 Hz +38%, worse
Qts0.56 +10%
Vas1.6 L −18%, better
BL3.7 T·m −19%, worse
Xmax1.1 mm +214%, better
Sensitivity87.5 dB +3.1, better
SB AcousticsSB12PFCR25-8
£19.19 · 13% more, worseFs59 Hz −26%, better
Qts0.48 −6%
Vas5.3 L +170%, worse
BL4.6 T·m –
Xmax10 mm +2757%, better
Sensitivity85 dB +0.6
Dayton AudioDMA80-8
£19.55 · 15% more, worseFs98 Hz +22%, worse
Qts0.47 −8%
Vas1.1 L −42%, better
BL5.1 T·m +11%, better
Xmax2.5 mm +614%, better
Sensitivity84.4 dB –
FaitalPRO4FE32
£21.94 · 29% more, worseFs100 Hz +25%, worse
Qts0.53 +4%
Vas2.5 L +28%, worse
BL3.7 T·m −19%, worse
Xmax1.7 mm +394%, better
Sensitivity88.1 dB +3.7, better
Sica3.5 L 1 SL
£23.82 · 41% more, worseFs108 Hz +35%, worse
Qts0.57 +12%, worse
Vas1.4 L −29%, better
BL4.3 T·m −7%
Xmax1.5 mm +329%, better
Sensitivity86.6 dB +2.2, better
Tang BandW3-871B
£28.17 · 66% more, worseFs110 Hz +38%, worse
Qts0.52 –
Vas1.2 L −40%, better
BL3.7 T·m −19%, worse
Xmax0.5 mm +43%, better
Sensitivity86.1 dB +1.7
Dayton AudioRS100P-8
£30.21 · 78% more, worseFs96 Hz +19%, worse
Qts0.54 +6%
Vas1.8 L −7%
BL4.0 T·m −14%, worse
Xmax3.7 mm +957%, better
Sensitivity85.5 dB +1.1
Dayton AudioND105-4
£31.12 · 84% more, worseFs79 Hz –
Qts0.61 +20%, worse
Vas2.0 L –
BL4.5 T·m –
Xmax4 mm +1043%, better
Sensitivity83.7 dB −0.7
Tang BandW3-315E
£32.83 · 94% more, worseFs100 Hz +25%, worse
Qts0.52 –
Vas1.7 L −14%, better
BL3.9 T·m −15%, worse
Xmax1.3 mm +257%, better
Sensitivity86.7 dB +2.3, better
CIARECM100
£40.52 · 139% more, worseFs160 Hz +100%, worse
Qts0.43 −16%, better
Vas1.8 L −8%
BL4.1 T·m −11%, worse
Xmax1.9 mm +443%, better
Sensitivity93.5 dB +9.1, better
Scanspeak10F/8414G10
£73.39 · 333% more, worseFs100 Hz +25%, worse
Qts0.51 –
Vas1.6 L −20%, better
BL4.3 T·m −6%
Xmax2.3 mm +557%, better
Sensitivity85.9 dB +1.5
WavecorSW084OM02
No current priceFs77 Hz −4%
Qts0.53 +4%
Vas1.7 L −13%, better
BL4.6 T·m –
Xmax4.5 mm +1186%, better
Sensitivity83.4 dB −1
Tang BandW3-1053SC
No current priceFs100 Hz +25%, worse
Qts0.52 –
Vas1.8 L −10%
BL3.7 T·m −19%, worse
Xmax0.75 mm +114%, better
Sensitivity87 dB +2.6, better
Tang BandW3-926SDF
No current priceFs100 Hz +25%, worse
Qts0.49 −4%
Vas1.9 L −4%
BL3.7 T·m −19%, worse
Xmax0.75 mm +114%, better
Sensitivity87.5 dB +3.1, better
PeerlessSDS-100F25CP18-04
No current priceFs84 Hz +5%
Qts0.59 +16%, worse
Vas1.9 L −5%
BL4.5 T·m –
Xmax5.0 mm +1343%, better
Sensitivity84.3 dB –
Tang BandW3-2088S0F
No current priceFs45 Hz −44%, better
Qts0.48 −6%
Vas2.1 L +7%
BL5.7 T·m +23%, better
Xmax7 mm +1900%, better
Sensitivity77.4 dB −7, worse
Tang BandW3-926SD
No current priceFs110 Hz +38%, worse
Qts0.46 −10%
Vas1.9 L −4%
BL3.8 T·m −16%, worse
Xmax0.75 mm +114%, better
Sensitivity89 dB +4.6, better
Tang BandW3-316B
No current priceFs100 Hz +25%, worse
Qts0.44 −14%, better
Vas1.9 L −4%
BL4.1 T·m −10%
Xmax1.2 mm +243%, better
Sensitivity88 dB +3.6, better
VisatonW 130 S - 8 Ohm
No current priceFs52 Hz −35%, better
Qts0.47 −8%
Vas12 L +512%, worse
BL4.6 T·m –
Xmax8 mm +2186%, better
Sensitivity86.6 dB +2.2, better
Dayton AudioDMA90-8
No current priceFs94 Hz +18%, worse
Qts0.57 +12%, worse
Vas1.7 L −13%, better
BL4.7 T·m –
Xmax2.5 mm +614%, better
Sensitivity84.9 dB +0.5
Dayton AudioDMA90-4
No current priceFs88 Hz +10%, worse
Qts0.45 −12%, better
Vas2.3 L +16%, worse
BL3.5 T·m −24%, worse
Xmax2.5 mm +614%, better
Sensitivity86.5 dB +2.1, better
Dayton AudioRS125T-8
No current priceFs76 Hz −5%
Qts0.50 –
Vas3.6 L +82%, worse
BL5.0 T·m +10%, better
Xmax2.8 mm +700%, better
Sensitivity86.1 dB +1.7
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 | £16.95, the lowest price | 12 in stock | Visit shop at Lautsprecherteile |
Best price over time
Tracked since 1 Oct