It actually sounds good, to be fair. But the fact is, I didn't have it in my possession w/ the original caps long enough to be able to notice a significant difference. Further, my speakers are very limited in the lower frequencies, so any improvement there is impossible to judge.
I actually don't have any complaints about the sound, save for the fact that a high frequency problem has arisen, which means the amp will need to be serviced (the right channel emits a lot of spitty hiss, for lack of a better way of putting it, while there is no source playing. I assume it's a capacitor problem of sorts).
Maybe when it goes in for service, I'll ask the tech to have a look-see for me.
Incidentally, despite the original tech informing me that the new caps are physically smaller, I only recently looked under the hood, as a result of the right channel, upper frequency issues (wanted to see if i could spot anything obvious). I was pretty surprised to see just how MUCH smaller the new caps are, however, which is what raised the question in my mind in the first place.