Link. And tell me what you think. Note: It may work with other cans, too, but vanilla PortaPro should theoretically be best. Edit: EQs should be turned off, and it should be quite loud.

As a few of your know, I've been on some kind of "personal mission" to get the best possible sound out of these 30 dollars... and here's where I'm at right now. Since I'm a computer scientist, all you need is an unmodded PortaPro and a decent sound card. I've wrapped up a small configuration...

This is an attempt at making your Koss phones sound (arguably a lot) more natural. And I mean unmodded phones, because this is simply the only way to get consistent results. I started a thread about this some time ago, but I got almost no feedback from you. But since I'm speaking of a purely...

This is a purely digital (signal processing-based) modification to the PortaPro sound, so you'll need a PC for this. But still this is not strictly computers-as-source because you don't need a computer as a playback device, just as a number cruncher. Side note: Actually, this would also work...