It would be great if there was a stock TH900 there. To me, the problem with mods is that nobody has accurate audio memory in the way we discuss here; at best it is vague and you might remember some general things, big bass, hot treble etc. There is no way on earth you can confidently remember the sound signature of something days and weeks since last hearing it. We can assume we do, but we don't, it isn't like how memory for voices is encoded at all. So once somebody sends their headphone away, waits weeks for the mod and then gets it back it makes me wonder how they can be so sure of the results?
Don't get me wrong, I'm quite sure the mods change the sound signature, that isn't up for debate at all. I just wonder how it is that the mods are always judged as positive when simple probability suggests that is unlikely to be the case. I've never heard anybody say the mod didn't sound better. That is why I would love to hear the results of some blind listening comparisons against a stock TH900. I'm not trying to be an ass, and I have no doubt that people can hear differences and even prefer them, I just wonder how accurate the memory they compare against really is.
That is entirely reasonable. I've probably built up a bunch of expectation bias while ordering all the parts working on these mods. I would love to pit these against someone else's stock TH900. Also, I did not find the two iterations of the mod I've done better in every way. The first time, I felt like the mids were a little too forward; the second (current) time, my first impression was that the mids were a wee bit hollow and shouty. These concerns eventually became non-issues with some brain burn-in.