REDCATT4FR-1
£12.00 · 12% less, betterFs79 Hz −29%, better
Qts0.52 −15%, better
Vas1.8 L +102%, worse
BL4.8 T·m +3%
Xmax2.8 mm −15%, worse
Sensitivity83.7 dB −0.8
3-inch LF driver · WSF030 series · 20 mm voice coil · 30 W
Lavoce WSF030.70 8Ω
8 Ω · 100–12000 Hz
£18.73
SteadyParts Express · 3 in stock · Ships from United States · All 3 offers
- Fs
- 112Hz
- Xmax
- 3.3mm
- SPL
- 85dB
- Pe
- 30W
- BL
- 4.7T·m
- Vd
- 11cm³
- Qts
- 0.61
- Vas
- 0.89L
Lavoce WSF030.70 is a 3-inch 8 ohm LF driver rated at 30 W RMS. The validated T/S data includes Fs 112 Hz, Qts 0.61, Vas 0.9 L, Xmax 3.3 mm, sensitivity 84.5 dB, plus 11 cm³ Vd and 158 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 £13.61.
The published T/S values agree with each other
Thiele/Small
- Fs
- 112Hz
- Qts
- 0.61
- Qes
- 0.71
- Qms
- 4.3
- Vas
- 0.9L
- Re
- 6.3Ω
- Le
- 0.32mH
Motor and cone
- BL
- 4.7T·m
- Sd
- 33cm²
- Mms
- 4g
- Xmax
- 3.3mm
- Vd †
- 11cm³
- Voice coil
- 20mm
Power and response
- Sensitivity †
- 84.5dB
- Manufacturer sensitivity
- 85.5dB
- Power
- 30W
- Impedance
- 8Ω
- Min. impedance
- 6.9Ω
- Range
- 100–12000Hz
- EBP †
- 158 · Leans vented
Size and mounting
- Weight
- 0.5kg
Other published values
- Cms
- 0.58mm/N
- Xmech
- 4.3
- Power Program
- 60
Sensitivity shows 84.5 dB, calculated from the T/S values. Lavoce publishes 85.5 dB, 1.0 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else Lavoce lists
LF · Primary · 3″
- BL
- 4.7T·m
- Fs
- 112Hz
- Le
- 0.32mH
- Re
- 6.3Ω
- Sd
- 33cm²
- Cms
- 0.58mm/N
- Mms
- 4g
- Qes
- 0.71
- Qms
- 4.3
- Qts
- 0.61
- SPL
- 84.5dB
- Vas
- 0.9L
- Xmax
- 3.3mm
- Xmech
- 4.3
- Power
- 30W
- Impedance
- 8Ω
- Sensitivity
- 85.5dB
- Low limit
- 100Hz
- Power Program
- 60
- Calculated sensitivity †
- 84.5dB
- High limit
- 12000Hz
- Manufacturer sensitivity
- 85.5dB
- Min. impedance
- 6.9Ω
- Voice coil
- 20mm
- Weight
- 0.5kg
02
Compare
Same-size drivers, compared with the WSF030.70. Clear differences are green when better and red when worse.
This driverWSF030.70
Best price
£13.61
Fs
112 Hz
Qts
0.61
Vas
0.9 L
BL
4.7 T·m
Xmax
3.3 mm
Sensitivity
84.5 dB
Power
30 W
PeerlessGBS-85N25PR07-04
£14.61 · 7% more, worseFs130 Hz +16%, worse
Qts0.70 +15%, worse
Vas0.47 L −48%, better
BL4.5 T·m −4%
Xmax3.0 mm −11%, worse
Sensitivity83.1 dB −1.4
Dayton AudioDMA70-8
£20.92 · 54% more, worseFs114 Hz –
Qts0.50 −18%, better
Vas0.57 L −36%, better
BL4.7 T·m –
Xmax2 mm −39%, worse
Sensitivity82.6 dB −1.9
FaitalPRO4FE32
£21.94 · 61% more, worseFs100 Hz −11%, better
Qts0.61 –
Vas2.3 L +158%, worse
BL4.8 T·m +3%
Xmax2.7 mm −17%, worse
Sensitivity87.2 dB +2.7, better
SB AcousticsSB12PFC25-8
£22.06 · 62% more, worseFs64 Hz −43%, better
Qts0.56 −8%
Vas4.3 L +383%, worse
BL4.5 T·m −3%
Xmax5 mm +52%, better
Sensitivity84.4 dB –
Dayton AudioPS95-8
£22.18 · 63% more, worseFs120 Hz +7%
Qts0.72 +18%, worse
Vas0.9 L +6%
BL3.8 T·m −18%, worse
Xmax2.5 mm −24%, worse
Sensitivity85.1 dB +0.6
Dayton AudioDMA105-8
£22.18 · 63% more, worseFs72 Hz −36%, better
Qts0.63 +3%
Vas4.2 L +377%, worse
BL4.5 T·m −3%
Xmax2.5 mm −24%, worse
Sensitivity84.8 dB –
Dayton AudioND65-8
£25.12 · 85% more, worseFs102 Hz −9%
Qts0.65 +7%
Vas0.36 L −60%, better
BL4.2 T·m −10%
Xmax3.5 mm +6%
Sensitivity79.3 dB −5.2, worse
Dayton AudioND90-4
£25.12 · 85% more, worseFs90 Hz −19%, better
Qts0.63 +3%
Vas1.1 L +19%, worse
BL3.5 T·m −25%, worse
Xmax4 mm +21%, better
Sensitivity82.4 dB −2.1, worse
Dayton AudioND65-4
£25.12 · 85% more, worseFs90 Hz −20%, better
Qts0.61 –
Vas0.53 L −40%, better
BL2.7 T·m −42%, worse
Xmax3.5 mm +6%
Sensitivity79.5 dB −5, worse
Sica4 L 1 SL
£25.96 · 91% more, worseFs108 Hz −3%
Qts0.63 +3%
Vas1.2 L +35%, worse
BL5.1 T·m +10%
Xmax2.4 mm −27%, worse
Sensitivity84.9 dB –
Dayton AudioND90-8
£25.96 · 91% more, worseFs71 Hz −37%, better
Qts0.65 +7%
Vas1.8 L +99%, worse
BL4.3 T·m −8%
Xmax4 mm +21%, better
Sensitivity81.2 dB −3.3, worse
VisatonW 100 S
£26.22 · 93% more, worseFs63 Hz −44%, better
Qts0.54 −11%, better
Vas5.4 L +508%, worse
BL4.3 T·m −8%
Xmax4 mm +21%, better
Sensitivity85.1 dB +0.6
Dayton AudioRS100-8
£29.95 · 120% more, worseFs92 Hz −18%, better
Qts0.58 −5%
Vas1.4 L +61%, worse
BL4.2 T·m −10%
Xmax3.5 mm +6%
Sensitivity83.7 dB −0.8
Dayton AudioRS100P-8
£29.95 · 120% more, worseFs96 Hz −15%, better
Qts0.54 −11%, better
Vas1.8 L +104%, worse
BL4.0 T·m −15%, worse
Xmax3.7 mm +12%, better
Sensitivity85.5 dB +1
Dayton AudioND105-4
£30.59 · 125% more, worseFs79 Hz −30%, better
Qts0.61 –
Vas2.0 L +121%, worse
BL4.5 T·m –
Xmax4 mm +21%, better
Sensitivity83.7 dB −0.8
Dayton AudioND105-8
£30.59 · 125% more, worseFs67 Hz −41%, better
Qts0.66 +8%
Vas3.0 L +234%, worse
BL5.4 T·m +17%, better
Xmax4 mm +21%, better
Sensitivity82.8 dB −1.7
CIAREPA100
£31.09 · 128% more, worseFs100 Hz −11%, better
Qts0.59 −3%
Vas2.5 L +181%, worse
BL4.4 T·m −6%
Xmax2.5 mm −24%, worse
Sensitivity87.6 dB +3.1, better
FountekFR58EX
£37.73 · 177% more, worseFs134 Hz +20%, worse
Qts0.55 −10%
Vas0.01 L −99%, better
BL3.4 T·m −27%, worse
Xmax2.9 mm −12%, worse
Sensitivity67.5 dB −17, worse
WavecorWF095WA02
£41.21 · 203% more, worseFs86 Hz −23%, better
Qts0.62 –
Vas1.6 L +80%, worse
BL3.6 T·m −23%, worse
Xmax2.7 mm −18%, worse
Sensitivity83.7 dB −0.8
CelestionAN3510
£42.00 · 209% more, worseFs113 Hz –
Qts0.65 +6%
Vas1.9 L +110%, worse
BL4.6 T·m –
Xmax2.3 mm −32%, worse
Sensitivity87.7 dB +3.2, better
CelestionTFX0412
£69.00 · 407% more, worseFs95 Hz −15%, better
Qts0.59 −3%
Vas2.2 L +145%, worse
BL5.4 T·m +16%, better
Xmax4 mm +21%, better
Sensitivity86.5 dB +2, better
VisatonB 80
£72.64 · 434% more, worseFs110 Hz –
Qts0.63 +3%
Vas1.8 L +102%, worse
BL4.2 T·m −11%, worse
Xmax2.2 mm −33%, worse
Sensitivity87.4 dB +2.9, better
REDCATT35FR-2
No current priceFs128 Hz +14%, worse
Qts0.63 +3%
Vas1.1 L +28%, worse
BL4.8 T·m +3%
Xmax2.4 mm −29%, worse
Sensitivity87.5 dB +3, better
Dayton AudioCFC100-4
No current priceFs94 Hz −16%, better
Qts0.60 –
Vas0.8 L −6%
BL3.1 T·m −32%, worse
Xmax2.5 mm −24%, worse
Sensitivity81.7 dB −2.8, worse
Dayton AudioDMA90-8
No current priceFs94 Hz −16%, better
Qts0.57 −7%
Vas1.7 L +91%, worse
BL4.7 T·m –
Xmax2.5 mm −24%, worse
Sensitivity84.9 dB –
EminenceALPHA 4-4
No current priceFs120 Hz +7%
Qts0.63 +3%
Vas1.8 L +98%, worse
BL4.1 T·m −11%, worse
Xmax2.6 mm −21%, worse
Sensitivity88.4 dB +3.9, better
HiViB4N
No current priceFs56 Hz −50%, better
Qts0.52 −15%, better
Vas4.5 L +406%, worse
BL5.1 T·m +10%
Xmax3.2 mm −3%
Sensitivity83 dB −1.5
LavoceFSN030.71
No current priceFs134 Hz +20%, worse
Qts0.67 +10%
Vas1.0 L +17%, worse
BL3.8 T·m −18%, worse
Xmax2.1 mm −36%, worse
Sensitivity87.3 dB +2.8, better
PeerlessPLS-75F25AL02-08
No current priceFs100 Hz −11%, better
Qts0.74 +21%, worse
Vas1.1 L +21%, worse
BL3.6 T·m −23%, worse
Xmax3.4 mm –
Sensitivity83.1 dB −1.4
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
- Parts Express4.0 out of 51 rating · Checked 21 Oct 2026Read reviews on Parts Express
Each shop collects its own ratings. Bits shows them as published and doesn't verify them.
| Shop | Price | Against the lowest | Stock | Link |
|---|---|---|---|---|
Parts Express Import VAT and duty may apply | £18.73, the lowest price | 3 in stock | Visit shop at Parts Express | |
Blue Aran | £11.17 | Due 2 Dec 2026 | Visit shop at Blue Aran |
Best price over time
Tracked since 22 Jul