I've recently put my new system together and have noticed a hiss on the speakers. Everything looks ok from what I can tell. Here's my setup:

Outlaw 970 pre/pro, 7500 amp
All Outlaw interconnects, both optical and RCA.
All Klipsch speakers, RF7, RC7, RS62.
Monster cable speaker cables.
No sub.
Westinghouse LCD monitor

When only the amp is on, there's utter silence. No noise at all. As soon as I turn on the 970, I get the hiss - regardless of any other input devices being on or not and it doesn't change when switching from one input to another.

The entire system is on a single circuit, so that may be part of the problem. (only 1 major circuit for the living room) I have a couple of incandescent lamps on the circuit, as well as a UPS and my Computer. I made sure to turn off the lamps, PC, and UPS - no difference. The amp plugs directly into the wall, and the 970, DVD player and monitor are connected to a surge protector.

Suggestions?
Having a dedicated circuit run is possible, but would be low on the list of desirable options. I'd want to be pretty positive that's the fix before bringing in a contractor.