THE WALL---Why?

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

" filters are not meant to improve the sound. "
Then what are they meant to do?
Alan

Yes, I meant plugging the power amp into the electrical outlet in the wall, not the wall itself! I was initially disappointed with the sound given that I had spent a very large amount of money from my inheritance from my mom to finally buy my "dream system."  The dealer then came out and measured the electric current in the house, and decided that I needed a power plant because of the poor and fluctuating current provided by PG & E (Pacific Gas and Electric Co). The addition of the  P.S.Audio power plant resulted in an immediate HUGE improvement in sound quality. 
   I take it it's o.k. to plug the amp into the wall's electrical outlet. I will give it a try. ..
   THANKS to everyone for all of the thoughtful responses!!!

     ---Steve

Hi Alan. As I mentioned in my previous post, the primary purpose is to provide voltage/current in such a fashion so that it improves system component "health" (operation, efficiency, etc.). I've noted that not all manufacturers of filters make any claim about sound improvement. Also, consider what many on this forum and in this thread in particular have noted, which is in their opinion it can (paraphrasing) be a detriment to the sound. I suppose this is why those individuals plug an amp directly into the wall outlet. The concern shouldn't be less available current as virtually every filter manufacturer claims their product does not limit current. Depends on who you want to believe I suppose. Also, and as I've stated previously, if there is a sound improvement it really should be very subtle. If you're noticing some major improvement - as some tend to describe - I'd venture to say something is fundamentally wrong above and beyond power concerns. just my .02.