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An isolation transformer power conditioner solved my hum problem

Mark Tinordi,

I had a hum problem with my office system as I had intercionnected a synthesiser keyboard, the computer- whoch I use for HD recording, and the audio system, but there were all these different grounds. One of the problenms with having a computer connected to the same power as the audio system is that the computer is usually also connected to the phone or TV cable for the Internet, and these lines have separate grounds. In my case it was all the different grounds causing the problem.

To solve this and provide the best surge protection, I bought an 11Amp Oneac hospital isolation transformer power conditioner on Ebay for $50- plus $40 shipping (it weighs more than 40 lbs) and plug everything into that except the power amp, which, on Audio Research advice, goes directly to the wall to the same outlet as the Oneac. This $90 solution solved all my hum problems and I'm convinced the system is more dynamic and coherent. -The Oneac new four years ago cost about $1,200.

By the way, I recommend buying a 10Amp conditioner or higher- a 6.5 Amp Powervar proved to restrict the sound slightly, whereas the 11A Oneac and a 10A Powervar are just fine. And buy with a minimum of 6 outlets so you can plug eveything in to the same place. The Powervars are reasonably priced also- the 10A was $75 with $25 shipping a few months ago.


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  • An isolation transformer power conditioner solved my hum problem - Bambi B 12:53:37 04/24/07 (0)


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