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Hum in the system

Hi, I just installed a MSB Link DAC III in my system and that promptly caused a low but audible hum. The hum goes away as soon as I turn off my power amp. (but that's not exactly a workable solution....) Now, both the power amp (Acurus A-100) and the MSB have 3-pronged plugs, so I wonder if there is a ground loop problem. My question is, how do I fix it? The Mondial M.A.G.I.C won't work, because it is a cable ground isolator - at any rate I don't have cable TV. Any suggestions/solutions will be much appreciated. Thanks!
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hellohifi
120 posts
 
First try a cheater plug. Place on one component at a time and see what happens. Let me know the results and we'll then go to the next step.
cdpaigeac67
3 posts
 
I had a crackle in my system after I added a Rotel DAC and I finally narrowed it down to the digital interconnect. Some brands may not be compatible with all players or it may be defective. I put in a different brand cable and it fixed it right away. Also, check to be sure your cables are not in a "birds-nest" behind your cabinet. Piles of cables not run cleanly and neatly can lead to noise in more complex systems. But try the first posts recommendation first because it is most common fix (using non-grounded cheater plug).
tlc3388
1 posts
 
If have cable box connect with TV & DVD. You need to but a MagicBox.($100 for cable box) I had same problem before. (only on some amp) E-mail me if need more info. tlc@gus.net
avu
5 posts
 
I HAD THE SAME PROBLEM LAST WEEK WHEN I ADDED SOME COMPONENTS TO MY SYSTEM. 9 OUT OF 10 TIMES, IT'S THE VIDEO THAT CAUSE THAT GROUND LOOP SOUND. FLOATING THE GROUND IS A EASIEST WAY, BUT NOT RECOMMENDED FOR HIGH CURRENT AMP. COULD CAUSE FIRE! THE MAGIC BOX IS THE BEST WAY TO GO. IT'S THE ONLY ONE THAT WORKS. $100 FROM MONDIAL. GOOD LUCK, ANDY
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