Price Paid:  $0.00 from original pro-4 xtc @

Summary:
I have listened to these through several different sources. I found them to be the least forgiving cans I've ever used. They are also the closest to my pair of Stax electrostatics. I could hear differences in the cables I tried. My mp3 player sounded horrible through these. In contrast, my 2002e cartridge sounded as I expected... Great!!! Koss Corp. was great about their replacement policy. They upgraded me, no q's asked. These are very comfortable too. They were easy to wear for as long as I've needed. Sometimes I've worn them for sometimes 5-8 hours with little break time. There is NO fatigue what-so-ever. Overall, I would greatly recommend these. I stumbled onto these through the lifetime warranty Koss Corp. provided, & I thoroughly thank them for turning me on to these treasures!

Strengths:
Great, full, rich sound on the right equipment!

Weaknesses:
It would be very easy to mistake these for cheap horrible sounding cans, when the source is actually to blame.

Similar Products Used:
Many different brands & models of cans. Too many to list.