Thanks for everyones comments and participation.
What this has done for me aside from allowing me to tinker at my hobby is develop an actual chart showing the progressive change in sonic characteristics of an IEM, I know naysayers will always question that any results are real no matter how thorough the testing process (not saying my process is thorough BTW) but at least there is some actual evidence to back up burn in claims.
mvw2, I actually went out and bought a small mic and switched from my iphone to my PC along with using a program called Audio Test to continue my testing as I did realize the iphone wasn't good enough to be considered reliable. Also I agree about volume levels being needed as part of burnin. My first pair of Copper's were burned in using music at listening level only according to the original owner. The second pair was burned in at more aggressive volumes (I would set up my headphone to a listening level slightly louder than what I found comfortable with music then switch to my burn in file). I also exceeded that volume level for one 12 hour stretch near the end to ensure that the drivers were pushed as hard as I thought they could be safely done. I then did 24hrs straight of actual music starting the night before last and all day yesterday at a listening level that was agressive but not as aggressive as that one 12hr stretch to see if that would help bring up the treble especially with cymbals and the like (the music was a good mix of everything with lots of rock and jazz to ensure there were lots of cymbals).
I do think an IEM that is completely burned in (over a couple hundred hours of use) does not seem to benefit much from any additional stressed burning or using things like my burnin song as I did subject my original Copper's to the burnin file for 12hrs with no effective change and left them plugged in with my new pair for the 24hr music marathon and they never changed especially in the bottom end. Having said that there is also the possibility the one pair is slightly different for some reason outside of the manufacturers control as well.
The only real conclusion I think new Copper buyers should consider is this. If you want to ensure your IEM has the best possible bass slam, then download my burnin file and follow the process I laid out, it may or may not help but it certainly won't hurt. If you want a more balanced sound then use regular music to burnin (and only if you don't like the initial super bass the IEM has out of the box) and listen to it at normal volume levels only, again this may or may not effect your sound but won't hurt if you really want to keep the IEM balanced.
Edited by dweaver - 6/11/10 at 3:59pm