Why I buy this one ?
- 15 to 25,000 Hz frequency response
- Titanium-layered diaphragm design fosters accurate sound reproduction
- Straight dual-entry 5-foot cord with 0.125-inch and 0.25-inch stereo plugs
- Inline volume control
- Adjustable headband with sling and open-ear format

What our customer's say!

"Great sound, lousy durability", I have had my set for five months. The sound is excellent. Unfortunately, the wire needs a strain relief where it enters and exits the volume control. I suggest finding a spring about twice the size of a ball point pen refill spring and twist it over the wire and onto the rubber grommets that extend from the volume control. Maybe then the wire will last longer. The KOSS people will replace a broken set but you have to mail it in with a check for $6.00 for return postage. That is what they call a lifetime warranty.
For those who want occasional ear cover style, I pop the ear pieces out of the headband and put them inside a cheap set of noise blocking ear muffs like they sell for a couple bucks at the tool store.

"Excellent sound quality!", I'm not an audiophile, but this pair of headphones deliver clear, crisp trebles and mids and strong, well-defined bass. The volume control is very convenient, especially when I do not have convenient access to the volume control say in the school computer labs. The head band is a tad too tight though (though it grips nicely), and after one year of use, the plastic around the band broke. Nevertheless I will still buy another from Koss again. They make great sound!

"The best of their class, by far.", The Koss KTX-Pro, which is the same exact pair of headphones which goes under the name Pro-35 at RadioShack, are better than anything else on the market in their price range, in terms of sound quality. The only thing I've ever griped about, was that after extended use at high volume levels, my ears DID start to hurt just a little, and required a break. I think it somehow had to do with the shape and density of the metal adjustable outer band. Perhaps it was just a bit gripping, but still worth enduring, none the less. But that problem has now been solved. I simply bended them into shape, until they started to fit more comfortably. It's kind of like a new deck of playing cards - at first, they're a little TOO crisp and new, until after you've spent enough time "breaking them in," so they'll feel smoother when you shuffle. Or, if you know anything about string instruments, such as the guitar or violin, then you know the same thing also applies to every fresh new pair of strings.

And with the warranty I purchased with these headphones, I can break them and go right down the street to RadioShack, and replace them with a fresh new pair, as often as I want for free, until nearly 2006! And I love the fact that while my portable MD is snuggly in my inside coat pocket, with my coat zipped up, I can still run the cord down the front outside of the coat, then up into my pocket (thanks to the cord being long enough for this procedure), thus giving me easy access to the in-line volume slider. Even the volume slider itself is noteworthy, in the way the max volume level is at the bottom, while volume-down is at the top position of the slider. At first, one might think this is upside-down, but somehow it just feels convenient and natural after a while.

"WOW!!", The title of this review says it all. I still can't believe the massively great sound that this little baby puts out. I was originally looking for a nice set of headphones for my MP3 player, but now, they've become my standard set for my home theatre. My friend had recommended these to me about a week before I bought them, and man was he right about one thing; GREAT BASS! These phones really show me how far technology has come these days. It really DOES sound like 2 little 1" subs next to your ears. Not only is the bass amazing, but every little treb and mid is easily recognizable with amazing clarity. I plan to use these as long they'll still function, and then I'll just buy another pair. Great job Koss!

"Amazing bass and quality for the price", I already had 4 pairs of these...
this headphone is the cheapest of PortaPro family, and the sound is excellent, clean, deep bass; high sensitivity, even I can get satisfactory sound level from single-battery walkman
the reason why I give 4 stars is, the cable is easily broken, and the length is 1.5m, sometimes the cable tangle my feet when I am down on knee, and when I stand up when I don't undo the cable, the cable breaks, and I have repair myself, after that, I lost volume control and the length is reduced to 1m
there's new version comes out, which is KTX-PRO1, which uses plastic headband instead
if you prefer a standard headphone for about 20 bucks, this one is a must buy, you shall not regret for the sound

Read this reviews before You buy...

"What you'd expect for the price", I bought these to use for private keyboard playing. They didn't disappoint me for the price I paid. They were fairly adjustable, and were comfortable too. I also used them for computer gaming as they work well for 3D sound effects. The volume control works well too. Then one day, I tripped over the cord and the wire ripped right out of the volume control box. Ok, so maybe I tripped over it kind of hard. But if you are a little clumsy like me, take care of these; they aren't the sturdiest headphones you'll ever see. lol

"great bargain headphone", the sound quality is good,but the phones are a little uncomfortable. the volume control on the head phone is a great asset. But i have had better products from Koss though.

"Good while it lasts", The sound quality is nothing short of astounding -- the headphones deliver very impressive bass and clean sound overall. Aside from the higher-end Sonys, you will be hard-pressed to find a better pair of sub-$50 (and maybe even sub-$100) headphones. Its only weakness is that it is perhaps a little too strong on the low end -- if you really like bass, this may be a good thing, but it's not so great if you prefer hearing music the way it was recorded. The inline volume control is also very handy.

However these headphones have a major Achilles Heel: durability. Only a few months after buying them, I could begin hearing distortion in the right earphone when playing low bass, which suggested that something had come loose. Shortly after, this turned into a rattling, and then a complete loss of sound out of the right. This is not the first Koss product I've had problems with, but the others were cheapie $3 throwaway headphones so I was willing to give them another chance. It wasn't much of a surprise, either, since the headphones look and feel a little too cheaply made.

Shame, as I was impressed by how well they worked at such a low price. I suppose there's no such thing as a free lunch after all.

"Collapsible, but not Compact - Still a Good Buy", These headphones are a great buy for a few bucks! Perfect for the office, or on the run. While the ear pieces are a bit bulkier than more streamlined headphones, I personally don't mind them. I don't care for 'ear bud' type of headphones and too little padding is uncomfortable, so the bulkier, more heavily padded Koss Stereophones are great for me. Despite their larger size, they are lightweight and extremely comfortable.

Cord length is a major plus, especially if you're plugged into your computer. Not once have I rolled away from my desk and had my headphones ripped off my ears with these. 4 feet of cord is ample and the volume control built into the cord is a nice feature.

I found the sound quality to be very good with no noticeable distortion.

4 stars instead of 5, as the Koss Stereophones are "collapsible", though they are not very "compact". Also, they're fairly stiff when trying to collapse and a bit awkward that it feels as if the inexpensive plastic may break - so far so good though.

You could spend quite a bit more money for a much better pair of headphones, but if price is a concern, or if the highest quality product isn't an issue and you're looking for a standard pair of everyday headphones, you can't go wrong with these...

"Best headphones for protable CD player use", If you want a pair of headphones that deliver studio quality sound and you don't want to carry around gigantic headphones when listening to your portable cd-player then these are the headphones for you. Their quality is supurb and they are the same size as normal headphones. An excellent buy.