When I first got these the sound was rather tinny, but over the initial 50 hours they really, really opened up and grew to have a very natural sound. I have them paired with an HRT MS2+ and a Schiit Asgard, which is apparently a good match for Grados. That sound became more warm and round when I switched out the normal pads for quarter-cut softies. I did lose some soundstage with that, but the tradeoff for a more natural and full sound is totally worth it and it also took some sibilance out of the highs so they are very sweet.   Overall, after...