Equi=Tech Symmetrical Power System

Product Review

Equi=Tech

SYMMETRICAL POWER SYSTEM

Reprinted with permission from the July 1996 issue of EQ Magazine.

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EQ Magazine -- July, 1996

By Roger Nichols

The more you know about AC power, the better you will be able to cope with AC problems as they occur. The easiest problem to control is the most objectionable in the studio: ground noise. That's the point of this review. But before settling in to read this review, do yourself and your studio a favor and read my article "Power Management in the Studio" located somewhere else in this issue (you can find it if you listen really carefully for the clean sound...) It will help to explain why this review is here and why this system is important.

Equi=Tech TO THE RESCUE

There is not much you can review about the Equi=Tech Symmetrical Power System, because there are no knobs, no meters, no adjustments of any kind. There is only a power switch on the front and some AC receptacles with circuit breakers on the back. The "guts" of the system is the specially wound center tapped toroidal transformer that takes the unbalanced power in and delivers balanced, 60 volt-to-ground power on the output.

Equi=Tech Model ET1.5R

To install the Equi=Tech Symmetrical Power System, all you have to do is plug it in to an AC supply, throw away all of your ground lifting plugs and plug all of your equipment in to the receptacles in the back, and turn the front panel power switch on. That's it. Nothing will hum, nothing will buzz, your studio will be the quietest thing you have ever heard, or not heard in this case.

I have been using an Equi=Tech unit for about nine months. I have had fewer digital errors when transferring signals between equipment. AES and S/PDIF work as well as optical now.
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