Amp and preamp on same outlet?

The first step is to be using a dedicated AC line. If not, don't plug into a line that shares use with high-draw items like appliances.
Get 2 20v dedicated lines, then you can follow ARCs advice; one line for amp and pre, next line for components.

The outlet is most likely on a 15 amp circuit that is rated for 1800 watts. If you total everything that is on that circuit it will not come close to that. If the breaker has not tripped then you should be fine. Enjoy your stuff and don't worry. Anything else is pure overkill!

Tell me you're not really plugging your power amp and preamp into the same power circuit? Do you have no shame? It's a major, no make that mega-major no-no. I'm surprised it hasn't made your system unlistenable. If you continue with this sordid behavior you will be dragged out of your apartment, taken to a public square and beaten with power cords. I harumph you!

Onhwy61 funny as hell. He actually make like it.

That punishment is not severe enough. He should be stripped naked and hung by his toes and stoned to death by the villagers with VPI magic bricks and his remains hauled off for the vultures to feed on!