You're spot on with the break in .
The sound changed significantly for the better with break in.
I started with the Ayre VX5se , everything about the sound was great except for a lack of bass.
So moved on to a Pass X150.5
Not as good mid and top end but better bass.
Now I'm on the X250.5 by Pass Labs, now everything is what I want it to be.
The Legacy Signature Se and this amp is a great match.
Thanks for your advice....