THE WALL---Why?

czarivey, I'm guessing the dealer meant plugging the amp into the wall electrical outlet but I can't be sure. I've tried plugging mine directly into the wall and you're correct, the amp won't even power up.

Amp is 18ft from components between my speaker on a separate 20 amp line.

There is a difference between powerline filters and regenerators. Tried many filters none of which didmuch to improve the sound. Then purchased a PurePower regenerator, plugged everything into it and had a major improvement in sound. The PS Audio regenerators are also highly recommended
Alan

@ahendler not trying to be argumentative, but I'm of the opinion filters are not meant to improve the sound. Not to say that they can't, but if they do it usually would mean something was very wrong to begin with. I think ideally any improvement should be subtle at best and the maximum benefit is realized in your equipements "health". 

I was advised to use a voltmeter and gauge my outlets over time. It was pretty much constant (+/-1) all throughout the day and night for several days (including weekends). 
Any filtering I used diminished things so I went straight into the wall with my amp and everything improved. I have to add that this only happened after I upgraded my power cords. 
Everything else runs through my Blue Circle Thingee and sounds great.
Plugging my SACD player into the wall didn't improve it's performance so that, too, went into the conditioner.
I've yet to try a power regenerator but that is too expensive a proposition for me at this time. You'll only know if you try.

All the best,
Nonoise