As an introduction, I bought these when my Sennheiser HD202 broke after about a year of usage. After searching through numerous headphone options, I ultimately chose the Koss UR40 based primarily on price, brand name, and because I thought the headphone design looked really good. When it arrived, I eagerly tried it out, and I immediately fell in love. This is probably among the best headphones I've ever used.
First, I'll get sound quality out of the way. I'm no 'audiophile' -- generally, just about any modern day headphones sounds good to me. Personally, the design of the headphones (circumaural, supraural, earbuds, etc) seems to make more a difference in sound quality to me than anything else. But to get to the short of it, the Koss UR40 do sound pretty damn good. It gives as good of a bass response as my dead Senn HD202 did and the treble response is great. Admittedly, it does seem to lean more towards bass than treble (which is a bit unfortunate as I do find treble more important), but overall, the quality is more than good, and all my music sound as good as it ever did.
Okay, so if I find the sound quality as good as other headphones I've used in the past, why am I so in love with it? Well, it seems the design is good in more than just looks. Other reviewers mentioned it already and I can't stress this enough -- the Koss UR40 is SUPER COMFORTABLE.
Two factors allows for this. First, the headphones fits very lightly over my head -- almost the same way glasses fit onto your face. It simply rests on your ears instead of constricting like many headphones do. Second, the UR40 is extremely light weight; the weight is listed as 6oz, but it actually feels a lot lighter than most other headphones I've used which weights the same or even less. These two factors combined to make the UR40 fit in a way that is unobstrusive; I'm wearing it as I'm typing this review right now and I could think that, over time, I could forget I'm even wearing it. I've used quite a few headphones in the past and the only other headphones I can remember coming close to this level of comfort is the Sennheiser HD555.
To get to the point, I really do like the Koss UR40 primarily because of how comfortable it is combined with a very good sound quality. Some other reviewers seem to disagree, but I also really like the design as it looks sleek and the headband actually looks really neat. Plus the fact it's foldable makes for much better portability. Overall, there is only one complaint I can think of with this and it is the cord length. It's a teensy bit too short. The cord length is roughly 1.2m (or 4ft). I listen to music primarily on my computer, but I still move around a lot. I have a headphone cord extender already, but personally, I think the UR40's cord length could use another meter. One other thing -- this is not a problem for me personally, but it's one some others will definitely not appreciate: the UR40 has sound leakage. Someone next to you will definitely hear the music (and hear it with great clarity!), but it's not so bad that it'll wake a sleeping person.
In Summary
Pros:
- Amazing comfort level
- Great sound quality
- Great design
- Excellent price
Cons:
- Cord length is a bit small
- There is an amount of sound leakage
Needless to say, I highly, highly recommend the Koss UR40. Typically, when my headphones breaks, I simply move onto another brand/model as I like to experiment, but I admit that moving away of this will probably be pretty difficult for me. Not that it might be a big issue as I hear the UR40 also has amazing durability.
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From the brand
The Original American Stereophone Company
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In 1958 John C. Koss changed the way we all listen to music when he invented the world's first SP/3 stereophone.
Koss sought to replicate the excitement of a live musical performance, allowing listeners to experience sound as they had never before, bringing them closer to the music they love. Music lovers around the world recognize that dedication to accuracy in sound reproduction as: The Sound of Koss
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Birth of the Stereophone
Before the world's first SP/3 Stereophone in 1958, John C. Koss developed a portable stereo photograph player with side-wing speakers.
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World's First SP/3 Stereophone
in 1958 John C. Koss invented the world's first SP/3 Stereophone introducing personal stereo audio to the world.
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SP/3X
In 1960 Koss released the predecessor to the SP/3 with a lighter design, more comfortable headband and superior sound quality.
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Pro/4AA
In 1970 Pro/4AA set the standard for full-size professional headphones delivering true full frequency performance.
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Koss World Headquarters
On June 25, 1971 John C. Koss unveiled the new Koss World Headquarters in Milwaukee, Wisconsin.
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HV/1A
In 1974, Koss released the HV/1A the first dynamic headphone capable of reproducing all 10 audible octaves.
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Porta Pro
In 1984 the acclaimed Porta Pro was released and set performance and comfort standards worldwide for decades to come.
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JCK/300 Kordless System
In 1989 the JCK/300 Kordless Headphone system set the standard for infrared wireless headphones.
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ESP/950
In 1990 Koss's revolutionary ESP/950 electrostatic headphones introduced breakthrough high-fidelity sound.
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Pro4S Studio
Carrying on the legacy of the Pro/4 line, 2014's Pro4S Studio Headphone was specifically designed for audio professionals.
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KPH30i
In 2017 Koss released the acclaimed KPH30i featuring an ultra-light weight design with remarkable high-fidelity sound.
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Utility Series
In 2021 Koss Utility Series introduced three new headphones allowing listeners to connect via Lightning, USB-C and 3.5mm.
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True Wireless Earbuds
In 2023 Koss continued it's evolution of wireless headphones with the TWS250i True Wireless Earbuds.
Product Description
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Legendary Sound. Legendary Design.
Experience remarkable high-fidelity audio in an ultra lightweight, collapsible design.
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Ultra Wide Frequency Response
Titanium-coated, high-polymer diaphragms deliver breathtaking sound from 15-22,000 Hz at 60 Ohms.
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Create With Koss
UR40 was specifically designed for creators who demand comfort and exceptional audio performance.
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Take Anywhere
UR40 is perfect for on-the-go use and travelers thanks to its unique collapsible design.
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Designed for Extended Use
Soft breathable mesh headband and memory foam cushions provide an incredibly comfortable experience.
1 UR40 2 Titanium 3 Made for Creators 4 Collapsible Design 5 Uncompromising Comfort
Open Back
Screened ear cups provide open, hear-through sound that lets listeners stay in touch with the world around them.
Titanium Power
UR40 features dynamic Titanium-coated elements with Neodymium iron boron magnets that produce an ultra-wide frequency response from 15-22,000 Hz.
Uncompromising Comfort
Soft breathable mesh headband and plush memory foam cushions provide a comfortable listening experience for extended use.
Collapsible Design
Designed for listeners on-the-go, UR40 features a unique collapsible design that makes it ultra portable for travelers and creators.
Legendary Sound. Legendary Design.
Hearing is Believing
The UR40 features dynamic elements for a wide frequency response from 15-22,000 Hz. A 2 mil. Titanium coating on its diaphragms increases the rigidity of the elements, minimizing mechanical distortion and ensuring exceedingly accurate sound reproduction.
Uncompromising Comfort
At just over six ounces, the UR40 wears comfortably even after hours of continuous listening due to it's ultra lightweight design, airy mesh sling and plush leatherette cushions. An adjustable headband accommodates all head shapes and sizes for maximum comfort.
More Products From Koss
 UR40 |  Porta Pro |  Porta Pro Limited Edition |  Porta Pro Utility |  KPH40 Utility |  KPH30i |  KSC75 | |
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Customer Reviews
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796
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15,881
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1,771
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166
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893
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3,326
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8,011
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Price
| $31.50 | $39.99 | $59.99 | $49.99 | $39.99 | $29.99 | $19.99 |
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Type
| Over Ear | On Ear | On Ear | On Ear | On Ear | On Ear | Ear Clip |
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Connection
| 3.5mm | 3.5mm | 3.5mm | Utility Series | Utility Series | 3.5mm | 3.5mm |
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Utility Series
| — | — | — | 3.5mm, Lightning & USB-C | 3.5mm, Lightning & USB-C | - | — |
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Audio Controls
| — | — | In-Line Remote | In-Line Utility Cord Remote | In-Line Utility Cord Remote | In-Line Remote | — |
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Microphone
| — | — | In-Line Remote | In-Line Utility Cord Remote | In-Line Utility Cord Remote | In-Line Remote | — |
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Noise Cancelling
| — | — | — | — | — | — | — |
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Adjustable Headband
| Yes | Yes | Yes | Yes | Yes | Yes | — |
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Collapsible
| Yes | Yes | Yes | Yes | — | — | — |
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Carrying Case/Pouch
| — | — | Hardshell Case | Leatherette Pouch | — | — | — |
Compare with similar items
This Item  Koss UR40 Collapsible Over-Ear Headphones, Lightweight, Retro Style, Silver and Black |  |  |  |  |  | |
| Price | $31.50 | $39.99 | $49.99 | $59.99 | $69.99 | $49.99 |
| Delivery | Get it as soon as Wednesday, May 15 | Get it as soon as Tuesday, May 14 | Get it as soon as Tuesday, May 14 | Get it as soon as Tuesday, May 14 | Get it as soon as Tuesday, May 14 | Get it as soon as Tuesday, May 14 |
| Customer Ratings | ||||||
| Comfort | ||||||
| Sound quality | ||||||
| Noise cancellation | ||||||
| Volume control | ||||||
| Value for money | ||||||
| Sold By | Koss Stereophones | Koss Stereophones | Koss Stereophones | Koss Stereophones | Bsd Wholesale | Koss Stereophones |
| connectivity tech | Wired | Wired | Wired | Wired | Wired | Wireless |
| headphones form factor | Over Ear | On Ear | On Ear | On Ear | Over Ear | On Ear |
| connector type | 3 5mm Jack | USB Type C | USB Type C | 3.5mm Jack | 3.5mm Jack, 1/4-inch | wireless |
| headphones jack | 3.5 mm Jack | 3.5 mm Jack | 3.5 mm Jack | 3.5 mm Jack | 3.5 mm Jack | — |
| cable feature | Full-frequency clean sound turns any recording into a "live" performance Screened ear cups provide open, hear-through sound letting listeners stay in touch with surroundings Closed leatherette ear cushions form tight seal around ears, enhancing sound bass Enjoy greater volume levels, even with low-voltage portable devices Airy mesh sling provides soft, breathable support Lightweight frame (just over 6 oz) folds into protective compact configuration for easy portability Includes a straight, dual-entry 4 foot cord with gold-flashed 3.5 mm (1/8-inch) plug Includes 6.3 mm adapter Covered under the Koss Stereophones Limited Lifetime Warranty | Detachable | Retractable, Detachable | Retractable | Detachable | Without Cable |
| control type | Media Control | Media Control | Media Control | remote control,volume control | Media Control | remote |
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Koss UR40 Collapsible Over-Ear Headphones
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Reviews with images
First Open Backs Review
Disclaimer: I am not an audiophile by any means, I just enjoy sound and music.I ordered these headphones on a whim because they were Open Backs at a very good price for entry ($33-$40). The appeal was for a very wide soundscape, fantastic for Large Scoped Movies or Immersive Games.Sound: (Let's be honest, sound is pretty subjective, but I'll try to be as objective as possible)Starting with the most important aspect, the sound reproduction is above average based on the price range. Base sound, it leans a bit on the lows however, the mids and highs are definitely not extenuated enough, so it doesn't sparkle when you listen for it. I fixed this though by tweaking the equalizer to have a little more highs and it sounds a million times better for it."But what about that "soundscape" you ask? Well, It does a phenomenal job at doing it. First thing I had to try was Modern Warfare 2019, and Ground War sounds amazing in general with expanding the scope of the sounds. Vehicles, distant explosions, overhead helicopters and gunshots, it all was fantastic. Then I watched The Raid 2 with its very brutal but detailed sound effects with little music to distract it all. Also fantastic. Like a home theater for your ears. It really is a lot different than closed back headphones, or IEMs that I have tried. It really is something you have to try yourself if you haven't because for an entry, it has me wondering how it can get better from here if I just paid a little bit more.Build:The whole frame is very flimsy admittedly. Its all plastic, no metal components except the drivers. They are not stiff though so they can easily form on your head. It feels very light and almost like its not even there which is a plus. Ear pads are not good though, almost gives the impression that its on-ears and not over ears as advertised. Alternatives do exist though online. The wire is also pretty bad, like dollar earbud wires. They also aren't removable to note. They connect to both ear pieces instead of just one ending in a standard gold connector.Other notes: Just to say, since they are open backs, they are meant to bleed out sound as by design, and any sound in the background will come in. So have a quiet place to listen to the sound.I'd say for how much they are, they are definitely on the better end of this price range.
Top reviews from the United States
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Reviewed in the United States on September 30, 2011
Product Packaging: Standard PackagingVerified Purchase
Reviewed in the United States on March 23, 2022
Product Packaging: Standard PackagingVerified Purchase
Disclaimer: I am not an audiophile by any means, I just enjoy sound and music.
I ordered these headphones on a whim because they were Open Backs at a very good price for entry ($33-$40). The appeal was for a very wide soundscape, fantastic for Large Scoped Movies or Immersive Games.
Sound: (Let's be honest, sound is pretty subjective, but I'll try to be as objective as possible)
Starting with the most important aspect, the sound reproduction is above average based on the price range. Base sound, it leans a bit on the lows however, the mids and highs are definitely not extenuated enough, so it doesn't sparkle when you listen for it. I fixed this though by tweaking the equalizer to have a little more highs and it sounds a million times better for it.
"But what about that "soundscape" you ask? Well, It does a phenomenal job at doing it. First thing I had to try was Modern Warfare 2019, and Ground War sounds amazing in general with expanding the scope of the sounds. Vehicles, distant explosions, overhead helicopters and gunshots, it all was fantastic. Then I watched The Raid 2 with its very brutal but detailed sound effects with little music to distract it all. Also fantastic. Like a home theater for your ears. It really is a lot different than closed back headphones, or IEMs that I have tried. It really is something you have to try yourself if you haven't because for an entry, it has me wondering how it can get better from here if I just paid a little bit more.
Build:
The whole frame is very flimsy admittedly. Its all plastic, no metal components except the drivers. They are not stiff though so they can easily form on your head. It feels very light and almost like its not even there which is a plus. Ear pads are not good though, almost gives the impression that its on-ears and not over ears as advertised. Alternatives do exist though online. The wire is also pretty bad, like dollar earbud wires. They also aren't removable to note. They connect to both ear pieces instead of just one ending in a standard gold connector.
Other notes: Just to say, since they are open backs, they are meant to bleed out sound as by design, and any sound in the background will come in. So have a quiet place to listen to the sound.
I'd say for how much they are, they are definitely on the better end of this price range.
I ordered these headphones on a whim because they were Open Backs at a very good price for entry ($33-$40). The appeal was for a very wide soundscape, fantastic for Large Scoped Movies or Immersive Games.
Sound: (Let's be honest, sound is pretty subjective, but I'll try to be as objective as possible)
Starting with the most important aspect, the sound reproduction is above average based on the price range. Base sound, it leans a bit on the lows however, the mids and highs are definitely not extenuated enough, so it doesn't sparkle when you listen for it. I fixed this though by tweaking the equalizer to have a little more highs and it sounds a million times better for it.
"But what about that "soundscape" you ask? Well, It does a phenomenal job at doing it. First thing I had to try was Modern Warfare 2019, and Ground War sounds amazing in general with expanding the scope of the sounds. Vehicles, distant explosions, overhead helicopters and gunshots, it all was fantastic. Then I watched The Raid 2 with its very brutal but detailed sound effects with little music to distract it all. Also fantastic. Like a home theater for your ears. It really is a lot different than closed back headphones, or IEMs that I have tried. It really is something you have to try yourself if you haven't because for an entry, it has me wondering how it can get better from here if I just paid a little bit more.
Build:
The whole frame is very flimsy admittedly. Its all plastic, no metal components except the drivers. They are not stiff though so they can easily form on your head. It feels very light and almost like its not even there which is a plus. Ear pads are not good though, almost gives the impression that its on-ears and not over ears as advertised. Alternatives do exist though online. The wire is also pretty bad, like dollar earbud wires. They also aren't removable to note. They connect to both ear pieces instead of just one ending in a standard gold connector.
Other notes: Just to say, since they are open backs, they are meant to bleed out sound as by design, and any sound in the background will come in. So have a quiet place to listen to the sound.
I'd say for how much they are, they are definitely on the better end of this price range.
Images in this review
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Superbly surprised by it's performance at such a low cost!
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