Farmerkid Posted March 25, 2002 Share Posted March 25, 2002 I have a small problem with hum from my subwoffer. I have tried a new ground circuit, since I found a 200-800 mv difference beween my neutral and previous ground. While the problem is better, it is not 100%. Is there an inexpensive isolation transformer or other technique available? Thanks, Quote Link to comment Share on other sites More sharing options...
dbflash Posted March 25, 2002 Share Posted March 25, 2002 Farmerkid, Have you tried a "cheater plug" yet. 3 prong to 2 prong. I had the same problem in a house I use to live at. Put the plug in and all hum went away. Danny Quote Link to comment Share on other sites More sharing options...
Farmerkid Posted March 26, 2002 Author Share Posted March 26, 2002 I tried the cheater plug trick, it didn't fix the problem. I should add that there is a GFI in the circuit (installed by previous owners), along with a surge protector line strip. I plan to eliminate these sources one at time, then install a new circuit direct to service panel if necessary. Line routing may be an issue, as you know an HT setup can get messy, being somewhat anal I have bundled the speaker wires in one group and line power and source connections in another group. Quote Link to comment Share on other sites More sharing options...
dougdrake Posted March 26, 2002 Share Posted March 26, 2002 You might also try removing the upstream component connections, one by one, from your receiver to see if another device is introducing any type of ground loop. Doug ------------------ My System Quote Link to comment Share on other sites More sharing options...
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