Someone has developed an O2 booster board? And you notice "better clarity," "transients ... became sharper," and now things "are more thumpier?"
Just curious, but was that a subjective or objective conclusion?
P.S. I am certain that agdr has come up with something worthwhile. In no way am I attempting to state that it's not an improvement. If I had an O2, I'd build his booster board, too.
We can quite comfortably say that it's subjective. I sadly do not have any measuring equipment, and do not have another O2 to do any A/B testing with. Only my very likely biased memory of how it used to sound, and my ears. I may have been subjected to some mental voodoo magic in this case. I now have 2 additional green LED's I can oogle at though....
I'm not going to defend the O2, or the booster board though it did "feel" like it has some sort of improvement on my HD650s after the mod, and by no means (from what I've read so far) that the O2 can get any close to a BH Crack in terms of pairing with the HD650. Which of course will be my next acquisition to save up for.
I'm quite midway in this sort of topic: I find the subjective viewpoint as important as the objective. I could use analogies, but we are all of different backgrounds, perspectives, ear sizes, and appetite.
Sorry, I couldn't resist. Thank you for your thoughtful and considerate reply, despite my smart-alecky irony.