REDCATT4FR-1
£11.96 · 58% less, betterFs79 Hz −28%, better
Qts0.52 +11%, worse
Vas1.8 L −5%
BL4.8 T·m −20%, worse
Xmax2.8 mm –
Sensitivity83.7 dB −5.4, worse
4-inch LF driver · FE series · 40 W
FaitalPRO 4FE42 8Ω
100–20000 Hz
£28.64
SteadyBlue Aran · 17 in stock · All 5 offers
- Fs
- 110Hz
- Xmax
- 2.8mm
- SPL
- 89dB
- Pe
- 40W
- BL
- 6T·m
- Vd
- 14cm³
- Qts
- 0.47
- Vas
- 2L
Manufacturer response and impedance data, with source and trace details below. The left and right arrow keys read every shown curve at a frequency, a twelfth of an octave at a time, or an octave with Shift. Escape clears the reading.
Curve provenanceInspect 3 traces
These plotted lines are Bits digitizations of manufacturer evidence, not new measurements. How provenance works
- Trace datasheet-response-trace-poc/v1
0 degrees
Frequency response
122 plotted pointsMedium confidence298 selected pixels of 787 - Trace datasheet-response-trace-poc/v1
45 degrees
Frequency response
240 plotted pointsMedium confidence971 selected pixels of 971 - Trace datasheet-response-trace-poc/v1
impedance
Impedance response
240 plotted pointsMedium confidence1,287 selected pixels of 1,287
FaitalPRO 4FE42 is a 4-inch 8 ohm LF driver rated at 40 W RMS. The validated T/S data includes Fs 110 Hz, Qts 0.47, Vas 1.9 L, Xmax 2.8 mm, sensitivity 89.1 dB, plus 14 cm³ Vd and 220 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 £28.64.
The published T/S values agree with each other
Thiele/Small
- Fs
- 110Hz
- Qts
- 0.47
- Qes
- 0.50
- Qms
- 8
- Vas
- 1.9L
- Re
- 5.4Ω
- Le
- 0.07mH
Motor and cone
- BL
- 6T·m
- Sd
- 51cm²
- Mms
- 4g
- Xmax
- 2.8mm
- Vd †
- 14cm³
Power and response
- Sensitivity †
- 89.1dB
- Manufacturer sensitivity
- 94dB
- Power
- 40W
- Impedance
- 8Ω
- Range
- 100–20000Hz
- EBP †
- 220 · Leans vented
Size and mounting
- Diameter
- 129.8mm
- Cutout
- 91.5mm
- Bolt circle
- 115.3mm
- Depth
- 54.1mm
Other published values
- Cms
- 0.52mm/N
- Rms
- 0.30kg/s
- Power Program
- 80
Sensitivity shows 89.1 dB, calculated from the T/S values. FaitalPRO publishes 94.0 dB, 4.9 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else FaitalPRO lists
LF · Primary · 4″
- BL
- 6T·m
- Fs
- 110Hz
- Le
- 0.07mH
- Re
- 5.4Ω
- Sd
- 51cm²
- Cms
- 0.52mm/N
- Mms
- 4g
- Qes
- 0.50
- Qms
- 8
- Qts
- 0.47
- Rms
- 0.30kg/s
- SPL
- 89.1dB
- Vas
- 1.9L
- Xmax
- 2.8mm
- Power
- 40W
- Impedance
- 8Ω
- Sensitivity
- 94dB
- Low limit
- 100Hz
- Power Program
- 80
- Calculated sensitivity †
- 89.1dB
- High limit
- 20000Hz
- Manufacturer sensitivity
- 94dB
- Diameter
- 129.8mm
- Depth
- 54.1mm
- Cutout
- 91.5mm
- Bolt circle
- 115.3mm
02
Compare
Same-size drivers, compared with the 4FE42. Clear differences are green when better and red when worse.
This driver4FE42
Best price
£28.64
Fs
110 Hz
Qts
0.47
Vas
1.9 L
BL
6 T·m
Xmax
2.8 mm
Sensitivity
89.1 dB
Power
40 W
Dayton AudioDS90-8
£16.44 · 43% less, betterFs81 Hz −26%, better
Qts0.43 −9%
Vas1.3 L −31%, better
BL4.8 T·m −21%, worse
Xmax2.5 mm −12%, worse
Sensitivity83.3 dB −5.8, worse
Sica3.5 H 1 CS
£18.42 · 36% less, betterFs85 Hz −23%, better
Qts0.53 +13%, worse
Vas1.8 L −5%
BL4.8 T·m −19%, worse
Xmax2.5 mm −12%, worse
Sensitivity84.9 dB −4.2, worse
Dayton AudioDA115-8
£18.69 · 35% less, betterFs60 Hz −45%, better
Qts0.41 −13%, better
Vas4.4 L +132%, worse
BL5.7 T·m −5%
Xmax2.5 mm −12%, worse
Sensitivity84.9 dB −4.2, worse
Dayton AudioDMA80-8
£19.17 · 33% less, betterFs98 Hz −11%, better
Qts0.47 –
Vas1.1 L −40%, better
BL5.1 T·m −15%, worse
Xmax2.5 mm −12%, worse
Sensitivity84.4 dB −4.7, worse
Sica5 D 1 CS
£19.68 · 31% less, betterFs79 Hz −28%, better
Qts0.52 +11%, worse
Vas5.5 L +189%, worse
BL5.7 T·m −4%
Xmax3 mm +6%
Sensitivity88.7 dB –
Dayton AudioND91-8
£20.93 · 27% less, betterFs71 Hz −36%, better
Qts0.47 –
Vas1.5 L −19%, better
BL5.6 T·m −6%
Xmax5.1 mm +80%, better
Sensitivity82.1 dB −7, worse
Sica4 E 1 CS
£23.86 · 17% less, betterFs118 Hz +7%
Qts0.39 −17%, better
Vas1.3 L −32%, better
BL5.8 T·m −4%
Xmax2.2 mm −22%, worse
Sensitivity88.4 dB −0.7
CelestionAF4010
£30.13 · 5% more, worseFs105 Hz −5%
Qts0.81 +72%, worse
Vas2.1 L +12%, worse
BL6.0 T·m –
Xmax2.8 mm –
Sensitivity86.1 dB −3, worse
Dayton AudioRS125T-8
£47.22 · 65% more, worseFs76 Hz −31%, better
Qts0.50 +6%
Vas3.6 L +87%, worse
BL5.0 T·m −16%, worse
Xmax2.8 mm –
Sensitivity86.1 dB −3, worse
WavecorWF118WA02
£52.36 · 83% more, worseFs65 Hz −41%, better
Qts0.44 −6%
Vas4.3 L +126%, worse
BL5.8 T·m −3%
Xmax3 mm +6%
Sensitivity86.1 dB −3, worse
Tang BandW4-2417
£64.39 · 125% more, worseFs65 Hz −41%, better
Qts0.44 −6%
Vas4.6 L +140%, worse
BL5.4 T·m −11%, worse
Xmax2.5 mm −12%, worse
Sensitivity85.8 dB −3.3, worse
WavecorWF118WA05
£82.89 · 189% more, worseFs65 Hz −41%, better
Qts0.46 –
Vas3.5 L +84%, worse
BL4.3 T·m −28%, worse
Xmax3 mm +6%
Sensitivity85 dB −4.1, worse
WavecorSW118WA02
£84.74 · 196% more, worseFs60 Hz −45%, better
Qts0.47 –
Vas3.3 L +74%, worse
BL5.9 T·m –
Xmax4 mm +41%, better
Sensitivity83.6 dB −5.5, worse
Beyma5G40ND
£90.61 · 216% more, worseFs140 Hz +27%, worse
Qts0.45 −4%
Vas1.4 L −26%, better
BL10 T·m +67%, better
Xmax3 mm +6%
Sensitivity90.6 dB +1.5
WavecorFR070WA05
£100.39 · 251% more, worseFs89 Hz −19%, better
Qts0.47 –
Vas0.6 L −68%, better
BL3.8 T·m −37%, worse
Xmax2.7 mm −5%
Sensitivity81.4 dB −7.7, worse
PRV Audio5MR450-NDY-4
£115.51 · 303% more, worseFs150 Hz +36%, worse
Qts0.49 +4%
Vas1.6 L −18%, better
BL7.9 T·m +32%, better
Xmax3.3 mm +17%, better
Sensitivity92.2 dB +3.1, better
Tang BandW5-1611SAF
£121.16 · 323% more, worseFs60 Hz −45%, better
Qts0.44 −6%
Vas11.7 L +515%, worse
BL5.5 T·m −8%
Xmax3 mm +6%
Sensitivity88.9 dB –
WavecorWF120BD14
£133.13 · 365% more, worseFs58 Hz −48%, better
Qts0.46 –
Vas3.9 L +105%, worse
BL5.3 T·m −12%, worse
Xmax3 mm +6%
Sensitivity83.8 dB −5.3, worse
£276.27 · 865% more, worse
Fs67 Hz −39%, better
Qts0.40 −15%, better
Vas6 L +216%, worse
BL5.3 T·m −12%, worse
Xmax3 mm +6%
Sensitivity87.4 dB −1.7
Tang BandW3-2108
No current priceFs45 Hz −59%, better
Qts0.46 –
Vas1.7 L −10%
BL6.2 T·m –
Xmax7 mm +147%, better
Sensitivity76.9 dB −12.2, worse
WavecorWF120BD13
No current priceFs59 Hz −46%, better
Qts0.47 –
Vas3.8 L +100%, worse
BL5.3 T·m −12%, worse
Xmax3 mm +6%
Sensitivity84 dB −5.1, worse
VisatonAL 130 M
No current priceFs57 Hz −48%, better
Qts0.46 –
Vas9.1 L +379%, worse
BL5.6 T·m −7%
Xmax3 mm +6%
Sensitivity87.1 dB −2, worse
Tang BandW3-2088S0F
No current priceFs45 Hz −59%, better
Qts0.48 –
Vas2.1 L +11%, worse
BL5.7 T·m −6%
Xmax7 mm +147%, better
Sensitivity77.4 dB −11.7, worse
CelestionTFX0512
No current priceFs69 Hz −37%, better
Qts0.46 –
Vas5.4 L +183%, worse
BL6.4 T·m +7%
Xmax3.3 mm +15%, better
Sensitivity87.6 dB −1.5
Tang BandW4-1129E
No current priceFs120 Hz +9%
Qts0.44 −6%
Vas1.7 L −9%
BL5.2 T·m −14%, worse
Xmax1.8 mm −36%, worse
Sensitivity90.1 dB +1
Tang BandW3-926SD
No current priceFs110 Hz –
Qts0.46 –
Vas1.9 L –
BL3.8 T·m −36%, worse
Xmax0.75 mm −73%, worse
Sensitivity89 dB –
Tang BandW4-2099
No current priceFs60 Hz −45%, better
Qts0.47 –
Vas2.8 L +45%, worse
BL3.7 T·m −38%, worse
Xmax3 mm +6%
Sensitivity82.5 dB −6.6, worse
Dayton AudioDMA90-4
No current priceFs88 Hz −20%, better
Qts0.45 −4%
Vas2.3 L +19%, worse
BL3.5 T·m −42%, worse
Xmax2.5 mm −12%, worse
Sensitivity86.5 dB −2.6, worse
Tang BandW3-316B
No current priceFs100 Hz −9%
Qts0.44 −6%
Vas1.9 L –
BL4.1 T·m −31%, worse
Xmax1.2 mm −58%, worse
Sensitivity88 dB −1.1
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 |
|---|---|---|---|---|
Blue Aran | £28.64, the lowest price | 17 in stock | Visit shop at Blue Aran | |
Lean Audio | £28.64 | Back order | Visit shop at Lean Audio | |
SoundImports Import VAT and duty may apply | £40.15 | 40% above the lowest price | Back order | Visit shop at SoundImports |
Best price over time
Tracked since 1 Apr