I have a Denon 2900 modded by sacdmods. It seems that if I haven't used the player for an extended period of time, the player doesn't sound as open and/or there is some excess midbass. (The rest of my system is on 24/7.) Could this be a function the the zap filter having to re burn-in, or is...

I've had this machine for a few weeks now. Yes, it's sound is "gorgeous", warm, full yet clear and detailed. It would be hard for me to believe that someone hearing this could still complain the sound is too "digital" for their liking. My only problem is that in comparison to my Sony 222es...