A bargain for the price, no isolation though,
Verified Purchase(What is this?)
This review is from: Koss KSC75 Clip-On Stereo Headphones for iPod, iPhone, MP3 and Smartphone - Silver/Black (Electronics)
Build quality: they look rather fragile but they are not. Sturdy phones, nice rugged construction and thick cable, even though you might consider a mod to improve sound quality anyway.
Sound quality: these little beasts provide an impressive detail and an intimate soundstage, for almost any genre. Personally I don't particularly like their sound signature with a slow and very present bass, I have always been a fan of "clinical" listening with rapid and controlled response, but I seriously doubt I will ever find this feature on cans of this price.
Sound isolation: these are completely open, meaning that they will filter none of the noise from outside (and vice versa). You won't be able to hear anything while walking a noisy road, and in return, people around you will definitely hear your music in the library. These are best for casual listening at home or in the park, you may consider closed cans for outdoor or for very quiet public spaces.
After a few months of constant use, I notice some serious rattle coming from the right earcup. I'm waiting for a pair of new Audio Technica headphones, then I'll decide whether I will send these back or just let go.