shame. it seems that Koss has decided to save on their range "the plug" ....
a priori, these differences seem small, but by combining it all came out in one disappointed. Koss had accustomed us better. In addition, I noticed that no longer exists violent model / money in trading ...
My opinion is rather negative overall, but if I could give a review of the real model koss "the plug" (the original one, the same as in the photo), they would have been 4.5 / 5. ..
perfect insulation, and very present bass, good sound quality overall. I loved them.
finally, as the new version that I bought less suited me, I set quète headphones "perfect" ... and at a reasonable price ..
Obviously, they do not éxistent ^^. However, I found those which approach the + in my opinion.
I ordered Sennheiser CX500 on amazon there is a week arrived yesterday ...
and there, I got a good slap!
the sound is huge, the quality is, with good bass. plus they are top level design.
I found that their qualities (and they come with lots of accessories), except a little flat, the insulation is anyway lower than with koss ... (normal, they are semi and ITE not ITE).
but hey, you can not have everything, but if I go around the 2 models, there is no photo, I adopt the Sennheiser.
So this is what I had to say on koss "the plug" ... in short I loved their first version but it is no longer apparently they have been replaced by black, and some details are that the quality overall has dropped considerably.
that's why I recommend the Sennheiser cx500.