Threshold 400A Amplifier and Conrad Jonson MF2500A

Right at this moment I,m listening to the 400A plug directly to the wall no power conditioner. The top end of this amplifier is out of the world. Threshold 400A blue circle BC3 Despina Tube PreAmp Audiolab MDAC with ATC SCM 11 V2 Thanks for the advice guys. The power conditioner does not improve the 400A. This is a gem of  an amplifier. 

I'll admit I'm a c-j fanboy, but that Threshold is a killer amp.....enjoy

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. 

No conditioner can be risky.  At least use some sort of surge protector or UPS.  I have a whole house surge protector (only trips on big hits).  Additionally, I have PS Audio & Blue Circle conditioners throughout the house.  We had lightning hit a transformer a few years back, it tripped the house surge, it totally fried one of my PS Audio pieces (Dectet), which in turn saved about $10k worth of gear plugged into it.
Would I go straight into an outlet???  Never, especially with something like a 400A which is amazing, impossible to replace and would be too expensive to repair if you do have a power surge.