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3 Dedicated lines into 1

I had three dedicated lines run from my main panel when my basement was finished. I am still getting some hum even after putting in cable ground loop break and plugging all my components (other than main amp) into a Monster power conditioner. All of these helped but I think the remaining noise is because the amp and Monster are on different circuits. Does anyone think combining these circuits to be on the same line would help? I know very little about power but it seems that I have read that this could be causing my problem.

I have also thought that having a seperate ground put in and putting all three of my dedicated lines on it might have a good result. Any thoughts on this?

Thanks
bundy
lazarus28
339 posts
 
so wait - do you just clip the ground off of it with a pair of bolt-cutters?
polara
72 posts
 
this is f-n funny-i put in 2 more(1 already) dedicated lines sunday to try and solve a loop issue.one mono amp still sang a tune like this -hummmmmmm-well i grabbed a cheater plug out of the junk cabinet and now i'm finished.
called the amp builder and he said cheater plug was ok.
how long does it take new breakers, outlets and 12 ga wire (12 ft run) to break in --lol-- i noticed my sub amp likes its new home over the old line that it shared with lights and stuff.
bundy OP
127 posts
 
I put a cheater on my amp and now have quiet operation. I am still nervous that the amp is somehow not protected. Is there any downside to floating the ground?
jsawhitlock
302 posts
 
Bundy,
Take the cheater plug out and modify a power cord and improvements will be better! Drop the ground on the power cord. Happy Listening!
flex
292 posts
 
Bundy,
Since no one is answering your question, here are a few links to read. I'm not saying not to float the ground, but it's good to understand the situation before doing it.

1. On personal safety, see Gs5556's last paragraph in this:
http://forum.audiogon.com/cgi-bin/fr.pl?htech&1048100875&read&3&zzlPorschecab&&

2. On the fact that currents may appear on the component chassis (equipment dependent), are measurable, and may cause noise and hum:
http://db.AudioAsylum.com/cgi/m.pl?forum=general&n=56922&highlight=dedicated+lines&r=&session=

http://www.jensentransformers.com/apps_wp.html (see the downloadable paper on Hum and Buzz in Unbalanced Interconnect Systems for general floated ground discussion)

3. On equipment safety: I don't know of any problems, but you can take the advice above and check with the manufacturer.
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