first thing is to hire a lisence electrician and find out why you only get 112 volts, most places have 117 to 120 volt, than you could have the electrician run 2 dedicated lines from the breaker panel to your room one 20 or 30 amp for your amplifier, and one 15 or 20 amp for the rest of your front end, use the ps audio wall sockets they work really well, you could also get a line conditioner for your front end only, i would not use one for the amps, enjoy the music
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I would not limit to only two dedicated lines. The amplifiers, whether or not biamping for the front speakers might need 2 circuits alone. And with an HT setup, there are even more amplifiers to deal with. I would say at least two 30A circuits for any high current drawing amps and another two 20A for the remainder of amps and preamp/sources and one more for ancilliary electrical needs such as lights. It sounds like a lot, but now's the time to do it.
A member here, MikeLavigne, did a most impressive write-up on the work he went through to build a dedicated room. A big part of this was the electrical so he would be a very good source of hands-on experience as to what works and does not. And another member, AlbertPorter, has shared much of his experiences here on this topic.
Dedicated circuits -- the more the merrier. I would install at least four. One 15 amp for your digital gear, two 20 amps for your amps and one more 15 amp for other gear. There is a way to do AC filtering at the breaker box -- check the archives. Make absolutely sure they are properly grounded -- you'll be very glad you did.
This can be a very pricey endeavor, but one that is well worth the $$. You're on the right track as far as recommedations go. Dedicated lines first. At least two. Certainly, the more the merrier, but two will be very cool. Live we that awhile. Then get yourself an excellent power conditioner. I use Audio Magic, but Sound Application, Shunyata Hydra are both excellent choices. Now, you're almost done. Live and listen to your new electric. Then, get yourself some nice power cords. Go with the best from power conditioner to component. Dedicated outlets to power conditioner cords; you don't have to go gaga over, but, still, should be excellent. Now you know what you got? Electric nirvana. Now pray your system can deliver the goods..peace, warren
Here are some links I've noted for when I attempt my own AC project -
Research xentek or topaz isolation transformers. Also maybe twist the in-wall wiring every meter to help with RF rejection? Also research into "balanced power."
I have run 2 dedicated 20 amp lines using 10 guage shielded stranded copper wire(water proof).The ground wires of these 2 lines are grounded outside the panel buss directly to the copper ground wire that goes to the panel by means of a copper connector that was there when I had cable tv.The plugs are Hubbel, one line to a Hydra 2 for the power amps, and one to a Furman Balanced power conditioner for my pre, CLS11Z speakers, turntable. I have my cd player on a common house circuit, which I plan to change to a dedicated circuit.I also use Foundation Research line condioners on speakers, turntable,cd,pre-amp.With so much dirt in the lines you can't have enough filtering.