What's my next step in AC conditioning??

I most definitely noticed an improvement by running two dedicated lines (one for amps, and one for source/pre). But then, I am running several high current amps (two Adcom GFA-555II's in bridged mono, one Adcom GFA-2535, with two of the channels bridged mono), and the one (non-dedicated) line I had been using couldn't provide all the juice that I needed. While I feel that installing the two dedicated lines was the main improvement, I have also incorporated all PorterPorts, all DIY power cables (from Ernie Munier), and PS Audio Ulitimate Outlets on each line (with a HC model for the amps, and with PorterPorts installed for the two non-HC models). I believe that all of these components have been beneficial to my setup. Also, FWIW, my dedicated pre/source AC line is 12AWG Belden, and the line for the amps is 10AWG Romex (the 9AWG Belden was too pricey for me).

Hope this helps, Tom.

I just tried something this morning and I think that I may have cured my problem.
My audio system is set up in my den where I have the usual computer, moniters, printers, UPS's, plus other electronic devices.
This morning, I left everything plugged into the Monster HTS2000. However, I moved to an outlet of a seperate electrical line that has nothing but outside lights on it(via a heavy duty extension cord). Somehow my system is now quiet. Does this make sense? Is all I need a seperate dedicated line for my audio equipment? What this make such a difference?

Getting the other electronic devices off of your line should yield an improvement in lowering the "noise" on the line, and should also help to ensure that you are getting as much current as possible to your system. It sounds like a dedicated line (or two!) would be your most significant first step. It certainly was for me.

Tom.

Tom:
1. When you say that used 12AWG Belden & 10AWG Romex for your dedicated lines, do you mean that the electrician ran that gauge wire all the way from the breaker panel?
2. Have you ever tried plugging your amplifier directly into the Porter Port?
Thanks.
Uri

Uri:

Yes, the 12AWG and 10AWG lines are from a separate break out box, even before my breaker panel. I assisted in the wiring job, and ran the lines myslef (drilling through floor joices and everything!). No, I have not tried the amps direct without the UO's yet. I'd like to spend some time playing around with different configurations to see just which upgrades are doing what, but I barely had time to get the job done and get my system back together. With wife and two little kids, I have to get work like this done when they are out of the house.

Tom.