Dayton AudioGF180-4
£18.91 · 84% less, betterFs49 Hz −12%, better
Qts0.42 −5%
Vas16.5 L +139%, worse
BL6.5 T·m +6%
Xmax4 mm –
Sensitivity88.1 dB +2.2, better
5.5-inch LF driver · 38 mm voice coil · 120 W
RS Speakers MW 140.38 FIBONACCI 8Ω
8 Ω
No price for delivery to the UK
- Fs
- 56Hz
- Xmax
- 4mm
- SPL
- 86dB
- Pe
- 120W
- BL
- 6.2T·m
- Vd
- 31cm³
- Qts
- 0.44
- Vas
- 7L
RS Speakers MW 140.38 FIBONACCI is a 5.5-inch 8 ohm LF driver rated at 120 W RMS. The validated T/S data includes Fs 56 Hz, Qts 0.44, Vas 6.9 L, Xmax 4 mm, sensitivity 85.9 dB, plus 31 cm³ Vd and 113 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 £120.36.
The published T/S values agree with each other
Thiele/Small
- Fs
- 56Hz
- Qts
- 0.44
- Qes
- 0.49
- Qms
- 4.3
- Vas
- 6.9L
- Re
- 5.1Ω
- Le
- 0.45mH
Motor and cone
- BL
- 6.2T·m
- Sd
- 79cm²
- Mms
- 10g
- Xmax
- 4mm
- Vd †
- 31cm³
- Voice coil
- 38mm
Power and response
- Sensitivity †
- 85.9dB
- Manufacturer sensitivity
- 87.8dB
- Power
- 120W
- Impedance
- 8Ω
- EBP †
- 113 · Leans vented
Size and mounting
- Diameter
- 148mm
- Cutout
- 113mm
- Depth
- 72mm
- Weight
- 1.6kg
Other published values
- Cms
- 0.79mm/N
- Power Program
- 240
Sensitivity shows 85.9 dB, calculated from the T/S values. RS Speakers publishes 87.8 dB, 1.9 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else RS Speakers lists
LF · Primary · 5.5″
- BL
- 6.2T·m
- Fs
- 56Hz
- Le
- 0.45mH
- Re
- 5.1Ω
- Sd
- 79cm²
- Cms
- 0.79mm/N
- Mms
- 10g
- Qes
- 0.49
- Qms
- 4.3
- Qts
- 0.44
- SPL
- 85.9dB
- Vas
- 6.9L
- Xmax
- 4mm
- Power
- 120W
- Impedance
- 8Ω
- Sensitivity
- 87.8dB
- Power Program
- 240
- Calculated sensitivity †
- 85.9dB
- Manufacturer sensitivity
- 87.8dB
- Voice coil
- 38mm
- Weight
- 1.6kg
- Diameter
- 148mm
- Depth
- 72mm
- Cutout
- 113mm
02
Compare
Same-size drivers, compared with the MW 140.38 FIBONACCI. Clear differences are green when better and red when worse.
This driverMW 140.38 FIBONACCI
Best price
£120.36
Fs
56 Hz
Qts
0.44
Vas
6.9 L
BL
6.2 T·m
Xmax
4 mm
Sensitivity
85.9 dB
Power
120 W
FaitalPRO5FE100
£21.52 · 82% less, betterFs65 Hz +17%, worse
Qts0.45 –
Vas5.7 L −17%, better
BL6.9 T·m +12%, better
Xmax5.3 mm +31%, better
Sensitivity87.2 dB +1.3
Dayton AudioSIG120-4
£24.95 · 79% less, betterFs75 Hz +34%, worse
Qts0.43 –
Vas3.1 L −55%, better
BL5 T·m −19%, worse
Xmax4 mm –
Sensitivity86.4 dB +0.5
Dayton AudioDS135-8
£30.24 · 75% less, betterFs53 Hz −6%
Qts0.39 −11%, better
Vas7.3 L +5%
BL6.2 T·m –
Xmax4.8 mm +21%, better
Sensitivity85.4 dB −0.5
Dayton AudioDSA135-8
£30.24 · 75% less, betterFs52 Hz −7%
Qts0.38 −14%, better
Vas7.9 L +15%, worse
BL6.2 T·m –
Xmax4.9 mm +23%, better
Sensitivity85.7 dB –
CIAREHW131
£31.36 · 74% less, betterFs68 Hz +22%, worse
Qts0.39 −11%, better
Vas5.6 L −19%, better
BL7.0 T·m +14%, better
Xmax4.4 mm +10%, better
Sensitivity87.9 dB +2, better
Dayton AudioSIG150-4
£32.12 · 73% less, betterFs62 Hz +11%, worse
Qts0.49 +11%, worse
Vas8.7 L +26%, worse
BL5.2 T·m −15%, worse
Xmax4 mm –
Sensitivity87.8 dB +1.9
Dayton AudioRS125P-8
£37.81 · 69% less, betterFs70 Hz +26%, worse
Qts0.44 –
Vas4.0 L −42%, better
BL5.1 T·m −17%, worse
Xmax4 mm –
Sensitivity86.1 dB –
WavecorWF118WA08
£47.66 · 60% less, betterFs58 Hz +4%
Qts0.42 −5%
Vas4.9 L −29%, better
BL5.8 T·m −6%
Xmax4 mm –
Sensitivity85.3 dB −0.6
CelestionTFX0515
£48.07 · 60% less, betterFs74 Hz +33%, worse
Qts0.47 +8%
Vas6.5 L −5%
BL7.0 T·m +13%, better
Xmax3.8 mm −6%
Sensitivity89.2 dB +3.3, better
WavecorWF118WA02
£52.95 · 56% less, betterFs65 Hz +17%, worse
Qts0.44 –
Vas4.3 L −38%, better
BL5.8 T·m −6%
Xmax3 mm −25%, worse
Sensitivity86.1 dB –
EminenceALPHA 6C
£57.54 · 52% less, betterFs107 Hz +92%, worse
Qts0.45 –
Vas5.7 L −17%, better
BL6.4 T·m +4%
Xmax3.5 mm −13%, worse
Sensitivity93.6 dB +7.7, better
MonacorSPH-145HQ
£72.22 · 40% less, betterFs52 Hz −6%
Qts0.44 –
Vas9.4 L +36%, worse
BL5.3 T·m −13%, worse
Xmax3.5 mm −13%, worse
Sensitivity86.2 dB –
WavecorWF120BD05
£82.45 · 31% less, betterFs52 Hz −6%
Qts0.43 –
Vas5.3 L −23%, better
BL4.1 T·m −33%, worse
Xmax4 mm –
Sensitivity84.2 dB −1.7
WavecorSW118WA02
£85.78 · 29% less, betterFs60 Hz +8%
Qts0.47 +7%
Vas3.3 L −52%, better
BL5.9 T·m −4%
Xmax4 mm –
Sensitivity83.6 dB −2.3, worse
WavecorWF120BD08
£122.14 · 1% moreFs63 Hz +13%, worse
Qts0.45 –
Vas4.3 L −38%, better
BL5.5 T·m −11%, worse
Xmax4 mm –
Sensitivity85.4 dB −0.5
WavecorWF120BD10
£126.80 · 5% more, worseFs50 Hz −10%, better
Qts0.47 +7%
Vas6.2 L −10%, better
BL5.2 T·m −15%, worse
Xmax4 mm –
Sensitivity83.9 dB −2, worse
£389.85 · 224% more, worse
Fs38 Hz −32%, better
Qts0.42 −5%
Vas14 L +103%, worse
BL5.1 T·m −17%, worse
Xmax4 mm –
Sensitivity83.9 dB −2, worse
Audio Technology15 H 52 06 13 SDKAM-LR
No current priceFs65 Hz +17%, worse
Qts0.45 –
Vas9.2 L +33%, worse
BL6.4 T·m +4%
Xmax4 mm –
Sensitivity89.1 dB +3.2, better
Tang BandW6-658I
No current priceFs45 Hz −19%, better
Qts0.44 –
Vas28.3 L +310%, worse
BL6.3 T·m –
Xmax4.1 mm –
Sensitivity89.2 dB +3.3, better
CIARECX131
No current priceFs83 Hz +49%, worse
Qts0.43 –
Vas6.8 L –
BL4.6 T·m −25%, worse
Xmax3.5 mm −13%, worse
Sensitivity91 dB +5.1, better
CIARECW131
No current priceFs65 Hz +17%, worse
Qts0.39 −11%, better
Vas5.3 L −23%, better
BL5.7 T·m −8%
Xmax4 mm –
Sensitivity87.1 dB +1.2
CelestionTFX0512
No current priceFs69 Hz +24%, worse
Qts0.46 +4%
Vas5.4 L −22%, better
BL6.4 T·m +4%
Xmax3.3 mm −19%, worse
Sensitivity87.6 dB +1.7
CIAREHWL130
No current priceFs53 Hz −5%
Qts0.43 –
Vas11.2 L +62%, worse
BL5.8 T·m −6%
Xmax4 mm –
Sensitivity87.6 dB +1.7
Dayton AudioCFC180-4
No current priceFs52 Hz −6%
Qts0.43 –
Vas11.5 L +67%, worse
BL6.8 T·m +11%, better
Xmax4 mm –
Sensitivity87.1 dB +1.2
CIARECMI160
No current priceFs70 Hz +26%, worse
Qts0.41 −7%
Vas7.8 L +13%, worse
BL7.2 T·m +17%, better
Xmax4.5 mm +13%, better
Sensitivity89.8 dB +3.9, better
WavecorWF120BD09
No current priceFs54 Hz –
Qts0.50 +14%, worse
Vas5.3 L −23%, better
BL5.2 T·m −15%, worse
Xmax4 mm –
Sensitivity83.9 dB −2, worse
Tang BandW6-623I
No current priceFs46 Hz −17%, better
Qts0.41 −7%
Vas29.8 L +332%, worse
BL6.7 T·m +9%
Xmax4 mm –
Sensitivity90.1 dB +4.2, better
RS SpeakersW 140.38 FIBONACCI
No current priceFs47 Hz −16%, better
Qts0.41 −7%
Vas7.4 L +7%
BL6.8 T·m +11%, better
Xmax5 mm +25%, better
Sensitivity84.2 dB −1.7
MonacorTFX0515/8
No current priceFs74 Hz +33%, worse
Qts0.75 +70%, worse
Vas6.5 L −6%
BL7.0 T·m +13%, better
Xmax3.8 mm −6%
Sensitivity89.2 dB +3.3, better
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.