Rating: 
Summary: 60 Ohm Impedence - Lot of headroom reduces distortion
Review: Closed-earpiece headphones no matter the brand are not comfy for extended wear! The reason for purchasing these headphones is the 60 Ohm impedance. The higher the impedance rating allows you to listen to your home stereo, boombox, mp3 player, etc. at higher volumes without any distortion so you get great clarity and definiton from the bass, mids and highs. Also, you can plug this set of headphones into a stage monitoring system or instrument amplifier with the same great results. The Koss line of headphones are an exceptional value. Notice the cost of other manufactures' headphones that are rated at 60 ohms and above and you will see what I mean. No! I do not work for Koss, just an informed shopper!
Rating: 
Summary: Got them today, returning them tomorrow
Review: For $40 I expected far better build quality. The cord is quite thin on these, and they are all around made of a light duty plastic that does not inspire much confidence. The sound is OK, but nothing to rave about. I bought this model in the first place because Amazon was out of most of the other models I wanted. Now I know why this one was left over.
Rating: 
Summary: Great Value - but a little too tight cuz I wear glasses.
Review: For the value, these are good quality headphones. I bought these for work, looking for a cheaper alternative for my old Sony MDR-V600 (which are AWESOME if you want to drop [$$]).I am happy with the sound quality (awesome bass), but the only drawback was the comfort. These don't cover your entire ear, so the pads press on your ear (not too comfortable when you wear them with glasses). But if you can deal with that then these are an excellent value.
Rating:
Summary: Great Value - but a little too tight cuz I wear glasses.
Review: For the value, these are good quality headphones. I bought these for work, looking for a cheaper alternative for my old Sony MDR-V600 (which are AWESOME if you want to drop [$$]). I am happy with the sound quality (awesome bass), but the only drawback was the comfort. These don't cover your entire ear, so the pads press on your ear (not too comfortable when you wear them with glasses). But if you can deal with that then these are an excellent value.
Rating:
Summary: Best earphones I have bought
Review: I bought the Koss TD/80 stereophones a long time ago and was impressed with the sound and deep deep bass. I was a little concerned about the tight fit on my head however, the inner headband is made of durable aluminum. This allows it to be bent to adjust to different head sizes. Just be warned not to make the earcups too loose on your head, or else you will not hear as much bass. I recently wanted to upgrade to even better stereophones and picked the Sennheiser eh2200 which are even more expensive than the Koss TD/80. I was surprised to find that the Koss TD/80 produced even better sound and deep bass than the Sennheiser eh2200. This is surprising because the Sennheiser eh2200 are the most popular stereophones I could find on Amazon. So I am returning the Sennheiser eh2200 and sticking with the Koss TD/80.
Rating:
Summary: Not good enough...
Review: I bought these headphones to replace a pair Labtec LT-835s which I'd been using for five years. I am not an audiophile by any means, but the audio quality of these headphones does not meet my expectations. They sound kind of -- echo-y, I guess. Plus, the earcups are too small and the whole unit grips the head much too hard. These factors combine to make it a pain to use the TD-80 for more than 15 minutes at a time. The per-ear volume control sounds interesting (and even useful) but is not well implemented. The position and looseness of the dials makes it easy to jog one while you are putting them on or taking them off, throwing the L-R balance out-of-whack. I'm sending them back.
Rating:
Summary: Great sound for the price.
Review: I have owned a pair of these headphones for four years and they have provided me with excellent sound. They are very clear and comfortable to wear, and do not distort at high levels. I highly reccomend these Koss headphones.
Rating:
Summary: Definitely a good buy!
Review: I really love these headphones. They have volume control on each ear cup which is great when you have one ear that hears better than the other, like I do. I also love that the headband itself is made of metal not plastic, so you can stretch them out to fit your head without worrying about breaking them. The ear cups are adjustible too, so I can turn them slightly to fit my ears. I have also noticed that my ears don't sweat as much as with some of my other headphones. The cord is coiled so I don't have a long cord constantly hanging behind me and dragging on the floor. The sound is also pretty good, I've heard better but these are nice for all the features and the price. The only thing I don't like is the fact that the inner part of the ear cup has nothing covering it. You have a nice cushiony padding around the rim and on the inside, nothing, just hard plastic. It almost looks like it's not finished. Besides this problem, I would definitely recommend these headphones.
Rating: 
Summary: Remember the old tin can phones
Review: I recently bought the TD-80 headphones and i must say i am not impressed at all. Remember the old Wendys commercial "Wheres the Beef" well i'm wondering wheres the Bass their isn't any at all it sounds very tinny and the idea to put volume controls on each speaker isn't the smartest idea you may also find yourself turning the volume up on whatever your listening to as i am right now listening to them. overall i don't know what headphones these other reviewers are listening to but not the ones i have.
Rating:
Summary: Five Stars for Desktop Computer Use
Review: I use these at my desktop computer. For that purpose they are excellent. The cord is long, they cover my ears so I don't hear outside noise, and there is a volume control on each ear piece. Good quality construction.
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