Threshold 400A Amplifier and Conrad Jonson MF2500A

I turn amps on a couple hours prior to listening. I dont find many hours necessary for getting them up to good running temperature. But as pointed out keeping amps on cuts back on the wear and tear.

Keep in mind you while leaving amps on you also risk damage if a bad electrical storm passes through while your not close and able to unplug electronics. I live in a region where electrical storms are common from about may into September so only do I power everything down I take the extra measure and unplug electronics for the insurance.  

Glad to hear you like it, those are butt kicking good. Looks and sound wise. I think any amp will sound at its best directly into the wall outlet and nothing breaking there communion. Reserve the filter plug ins for other sensitive electronics like your multiplayer/ cable box/ laptop and so.

I'm in a pinch for time I have a reference saved somewhere, it has lots of info and pretty pictures of past Pass designs of the era I will have to locate that one.