07-21-14: Milpai
I will keep the unit on for the whole night and see if that makes a difference. I am not sure if that extra circuit for the "BP" in the JC-2 is making it sound different than what the reviews for the standard JC-2 says.
There isn't really much "extra circuit" for the BP version. From what I've read the BP version has relays that slave out Volume and gain control and put a fixed resistor in place for unity gain bypass mode. This happens on the separate volume/gain pcb, I believe the active channel pcb's are unchanged from the original non-bypass version. Parasound claim no sonic difference between the models and I've never read that anyone identified a sonic difference between the two versions.
I'd definitely give the JC2 at least a week powered up before making any decision.