I thought your choice was a blunder but didnt want to bring you down.Received the Koss KPH40
I don't know if I got a defective set or what but it sounds as if I'm in an echo chamber.
Horrible sound quality, the headband was crushing my skull but if the sound quality was worth it I would have waited until they loosened up.
I plugged them into my iPod and tried a few songs, Day After Day by Badfinger which sounds great on my old as dirt Sennheiser HD414's, sounded so bad I couldn't listen to it. I tried putting the EQ on Rock as I had before but if anything it sounded worse.
This is the second set of KOSS Headphones I have tried recently and I am done with this brand.
I will try a pair of Sennheiser's next, pay more to hopefully get better sound quality. Actually nothing could sound worse than these.
Still recommending the Sony MDR-7506