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Compare 3 products

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Sennheiser MM 550 Headphones
Sennheiser MM 550
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Westone 4 Headphones
Westone 4
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Westone UM PRO 20 Headphones
Westone UM PRO 20
Available colors
Editiorial reviews
6
3.7 out of 5
3 user ratings
5 stars
0 %
4 stars
66 %
3 stars
33 %
2 stars
0 %
1 stars
0 %
Read editorial reviews
4
4 editorial reviews
Westone's newest product is the Westone 4R quad driver in-ears. New for the 4Rs is a user replaceable cable and more tightly matched drivers, and a slightly altered bundle. We take the 4Rs for a spin to see how they compare to the originals.Read more
Reviewed Mar 2011 Details: Westone’s flagship and the first quad-driver universal earphone. Note: Westone updated the form factor of all earphones several years after release. The W4 became the new W40. MSRP: $499.99 / manufacturer's page Current Price: The 4 has been replaced by the W40 and available for $499 from amazon.com Specs: Driver: Quad BA | Imp: 31Ω |Read more
When I first saw the press release announcing the Westone 4, my first thought was, “OK, now, it’s getting a bit silly.” After all, I’ve owned the Westone 3Read more
Read editorial reviews
User rating
37
4.2 out of 5
37 user ratings
5 stars
40 %
4 stars
40 %
3 stars
18 %
2 stars
0 %
1 stars
0 %
41
3.9 out of 5
41 user ratings
5 stars
24 %
4 stars
41 %
3 stars
31 %
2 stars
2 %
1 stars
0 %
44
3.7 out of 5
44 user ratings
5 stars
22 %
4 stars
36 %
3 stars
34 %
2 stars
4 %
1 stars
2 %

Technical details

Sound outputSurroundStereoStereo
StyleOn-EarIn-EarIn-Ear
Connectivity technologyWirelessWiredWired
Headset (integrated/enclosed microphone)yesnoyes

Design

Colour of productBlackBlack
  • Black
  • Transparent
Acoustic designClosedClosedClosed
Attachment typeHeadbandEar canalEar canal
Foldableyesno
N/A
Body material
N/A
PlasticFoam
Category
N/A
SportAudiophile
Water resistant
N/A
nono
Noise isolating
N/A
yesyes

Dimensions

Weight6.31 oz4.8 oz0.45 oz

Sound

Impedance590.0 Ω31.0 Ω27.0 Ω
Sensitivity< 107< 118< 119
Frequency range22 - 1500010 - 1800020 - 18000
Driver technologyDynamicBalancedBalanced
Audio formatSRS
N/A
N/A
Simulated surround soundyesnono
Channels
N/A
22

Connectivity

Cable length1.41.281.3
3.5 mm/6.3 mm adapter includedyes
N/A
N/A
Audio streaming via bluetooth
  • A2DP aptX
  • A2DP
  • AVRCP
  • HFP
  • HSP
N/A
N/A
Bluetooth version2.1+EDR
N/A
N/A
Wireless connectionBluetooth
N/A
N/A
Wireless range10
N/A
N/A
Type of connector3.5mm
N/A
N/A
USBno
N/A
no
Inputs supported
N/A
3.5mm3.5mm
Detachable cable
N/A
N/A
yes

Features

Noise-cancelingyesnono
Buttons
  • Answer button
  • Next song
  • Play/Pause
  • Previous song
  • Volume
Volume
N/A
Playback controls
N/A
yesno
Built-in heart rate monitor
N/A
nono
Calorie counter
N/A
nono
FM radio
N/A
nono
NFC
N/A
nono
Vibration
N/A
nono
Carrying case
N/A
yesno

Often compared with Sennheiser MM 550

Often compared with Westone 4

Often compared with Westone UM PRO 20