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Compare 3 products

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Koss Porta Pro Headphones
Koss Porta Pro
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Koss UR40 Headphones
Koss UR40
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Sennheiser PX 100-II Headphones
Sennheiser PX 100-II
Available colors
Editiorial reviews
15
3.9 out of 5
4 user ratings
5 stars
25 %
4 stars
50 %
3 stars
25 %
2 stars
0 %
1 stars
0 %
Read editorial reviews
2
2 editorial reviews
I'll write up a full review later, but these circumaural open headphones are just UNBELIEVABLE!   A recent pair of on ear headphones had impressed me with their sound quality, but were a major letdown in terms of comfort (lack thereof). Therefore, I began a search for potentially great...Read more
The Koss UR-20 are below-average headphones that perform poorly in most of our test categories. They are moderately comfortable but have a weak, unexciting sound...Read more
Read editorial reviews
5
5 editorial reviews
The Sennheiser PX-100-II are an open headphones designed for use when out and aboutRead more
The Sennheiser PX 100-II is a very good, stylish set of headphones that will nevertheless live in the shadow of the excellent original.Read more
The Sennheiser PX-100-II are an open headphones designed for use when out and aboutRead more
Read editorial reviews
User rating
62
3.8 out of 5
62 user ratings
5 stars
40 %
4 stars
20 %
3 stars
22 %
2 stars
11 %
1 stars
4 %
37
4.1 out of 5
37 user ratings
5 stars
32 %
4 stars
43 %
3 stars
24 %
2 stars
0 %
1 stars
0 %
36
4.2 out of 5
36 user ratings
5 stars
41 %
4 stars
36 %
3 stars
22 %
2 stars
0 %
1 stars
0 %

Technical details

Sound outputStereoStereoStereo
StyleOn-EarOver-EarOn-Ear
Connectivity technologyWiredWiredWired
Headset (integrated/enclosed microphone)nonono
Magnet materialNeodymium
N/A
Neodymium
Diaphragm material
N/A
N/A
Duofol

Design

Colour of product
  • Black
  • Black,Silver
  • Black
  • Black,Grey
  • Black,Silver
  • Silver
  • Black
  • White
Attachment typeHeadbandHeadbandHeadband
CategoryAudiophile
N/A
Travel and Commuting
Foldableyesyesyes
Noise isolatingyes
N/A
N/A
Connector contacts platingGold
N/A
N/A
Acoustic design
N/A
ClosedClosed
Body material
N/A
N/A
  • Metal
  • Plastic

Dimensions

Weight2.79 oz6.1 oz2.61 oz

Sound

Impedance60.0 Ω60.0 Ω32.0 Ω
Sensitivity< 101
N/A
N/A
Frequency range15 - 2500015 - 2200015 - 27000
Driver technologyDynamicDynamicDynamic
Driver size0.14 in
N/A
N/A
Total harmonic distortion (THD)0.2 %0.2 %0.1 %
Diaphragm diameter
N/A
N/A
1.57 in

Connectivity

Inputs supported3.5mm
N/A
3.5mm
Cable length1.21.21.2
3.5 mm/6.3 mm adapter includedyes
N/A
no
Type of connector3.5mm3.5mm3.5mm
USBnonono
Detachable cablenonono

Features

ButtonsPlay/PauseVolumeVolume
NFCyes
N/A
N/A
Carrying caseyes
N/A
N/A
FM radio
N/A
N/A
yes

Power

Battery operatednonono

Often compared with Koss Porta Pro

Often compared with Koss UR40

Often compared with Sennheiser PX 100-II