So, some of you may know about the Koss KSC75 clip-on earphones. They are legendary for providing a fantastic sound at a price of around $17. Well, like many, I had a pair of KSC75s that I modded by attaching a lightweight headband from Parts Express. The increased pressure does provide a fuller sound...and you don't have to be clipping them on. well, a few days ago, i was rummaging though a box of my brother's broken and/or corroded headphones, and I found these: I found some foam pads from another cheal set that fit. Then I found a broken pair of Sony MDR-V1s. I thought the KSC75 drivers might fit into the Sony cups....so i opened them up, ripped out the Sony drivers, and was super excited to discover that the Koss drivers fit almost perfectly! Like really, really close. So I got some Superglue and stuck them in there. Then...the moment of truth: how would they sound? Well...they sound FREAKING GREAT!!! Like jaw-dropping great. Very loud, great clarity, powerful bass, nice mids, and crisp highs. And the music sounds so PRESENT. I was giddy with excitement at how great they sound....so I decided to put them to the test. I did an A/B comparison with my brother's Grado PS1000's....which cost over $1k. And you know what? I think the modded KSC75's sound better. No lie. They are just more robust and dynamic and present. I will A/B these with some other headphones tomorrow, but right now I am thrilled to bits and blasting Yes's "Close to the Edge".... I'm going to order a used pair of those Sony's for $15 from ebay to use with my other KSC75's. I highly recommend you do the same. For less that $40, you will get headphones that will blow your socks off.