Can too many components on one outlet affect the sound of an amp?

A owner of a high end stereo store suggested that I get a 15-20 amp dedicated outlet for my amp.  He swears it makes a difference, frankly I can't hear any difference.

Of course you have to have a system capable of reproducing subtle differences and ears that can detect those changes.

Good luck.

For best sound i have my amp(Pass 350.8) in to its own outlet.

Thank you guys, I'll give that all these a try for sure and see if I can detect any differences. Stringsteen - I love the pictures of our system, where in AZ are you located? (I'm in Tucson)

Depending how isolated your current line is, you may not notice a difference. If other things are tapping electricity from that same line your amp is plugged into while your listening that creates the possibility of interference that can make its way to your amp. It can be very annoying while its happening, even if its subtle audible differences. Or more so when someones switches something on/off in another room and the amp is sensitive enough. That brief crackle result after interference runs up the line to your amp and becomes audible through your speakers. That used to make me cringe every time it happened. In fact one of my amps might have damage because of it. Not sure but its a hunch, it still has to be looked at.

I have my Pass amp into it's own outlet, my Pass pre into a different outlet, everything else into a power conditioner.  Sounds better to me