Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

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RE: Back to ask again (long! sorry!)

Posted by Rick B (A) on March 22, 2009 at 16:10:14

In Reply to: Back to ask again (long! sorry!) posted by author@escapeclause.net on March 17, 2009 at 13:46:17:

Have you tried taking all the video stuff out of circuit and setting up just the CD player, preamp, and amp in a minimal two channel configuration, and all plugged into the newer dedicated circuit?

If you did, what did that do?

Have you left the equipment on, but not unused, for a couple of days and then tried playing it? Or are you constantly plugging and unplugging stuff? Do you turn the CD player, preamp and amp on and off all the time?

And really, you shouldn't have things on two different circuits if they are on opposing legs of the AC supply if you can avoid it...

I'd try just a minimal setup on just the one, properly grounded, circuit and see what happens...

Looking at you pictures, though, the best thing would probably be a new breaker box, new breakers, and new home runs to the audio room that are all on the same leg of the AC supply...(In case you don't know, the AC voltage supplied to American homes is in the form of two hot legs and one grounded neutral...from the neutral to one of the hot legs give you your 120V...hot to hot, 240V)...that would eliminate all the rectification problems that are present in old AC wiring that has suffered through many humid years in Florida's climate and any kind of ground potential build up that may be there...I don't know, I'm not there to go thru the stuff...and use at least some decent AC outlets like the Pass and Seymour or others that have been mentioned time and time again....

The money you spend on good quality AC runs usually returns many rewards in audio and video quality increases....get a pro to check out your AC...if there is leakage of DC from a bad HT transformer, get the utility company to replace it...if there are bad ground connections at your AC entrance, get the electrician to repair it, if it's at the pole pig, get the utility to fix it...

I'd also try and find someone that has an AC line noise sniffer, like the Audio Prism device, or a spectrum analyzer, and see just how good or bad your AC really is...

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