I absolutely love my Koss PortaPro headphones. Perhaps it’s some way that I handle them over a long period of time, but I’ve found that they don’t last more than a year or two. While I’d normally consider that unacceptable, they’ve got a great lifetime exchange and repair program. That’s all I wanted to say. No amazon referral link, just happiness that I hopefully won’t have to buy headphones for a very very long time.