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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.
Post Subject: That's why my judgments won't be very usefulPosted by Antonio J. on: 12/6/2007
 Romy the Cat wrote:

I looks at the statistics page of my site and it looks like there were zillions Netherlandiams visiting the site. I wonder why they don’t say how the Kemp regenerator sounds. The judgment part? Well, this is an easy part. You have your power devise and plug it in the power lines during the times when electricity sounds very good. You should not have any sonic, perceptible, imaginary, placebo, conscious or subconscious differences between the sound of your playback with and without the power device. It is not sufficient judgment itself but it is already a good start, the start that no one know to me power units can handle. For premature judgment a power device should be treated as a preamp: 

http://www.goodsoundclub.com/Forums/ShowPost.aspx?PostID=2589

Rgs, Romy the Cat


The electrical supply in my building (I live in an 11th story of a 13th stories building) is very bad, as is in the whole area, which in spite of being residential, has 2 big hospitals around that probably have huge consumption. I have a dedicated line from breaker to the outlet, but I can't have it made from the building's input. In spite of this, I suffer huge voltage swings ranging from 210 to 224V. This caused problems with some gear, not only "sound" ones, but also some devices having big DC offset at its output. I fixed this using a quite big industrial grade voltage stabilization unit, which uses two transformers and a voltage stabilization circuit. It can deliver 1000VA continous and can be delivering up to 4000VA for several minutes before shutting off. This changed the situation and now I have way more stable voltage from 228 to 232V at any moment I measure. The whole system runs through this device. This is just a voltage stabilizator, but not a full new sinewave regenerator, and for sure it doesn't decouple the system from the electrical grid as the APS or the Kemp would do. Soundwise I found this device very transparent, I mean that I wasn't able to determine if it changed a bit the sound performance of the system on good electricity days.
Since I have this unit in the system I haven't looked back. I experience "good electricity" days and bad ones, for sure this is not voltage related but who knows what else. Anyway, the point is that if I used the Kemp, I'd run it after the stabilizator, which could be masking or maybe enhancing the Kemp's features. On the other hand, this stabilizator of mine seems to be sensitive to the type of load, and an acquaintance of mine who's using it experiences problems having a steady voltage when using an autotransformer and a Variac plugged into it. Hence I don't know if the Kemp's unit would affect the performance of the stabilizator, thus affecting the overall result.

Of course I could remove the stabilizator from the system and just trying the Kemp as you suggest on a "good day", but then I fear I'd get back to the swinging voltages and DC offset on the units which weren't receiving their feed through the Kemp. Even on "good days" the voltage is swinging :-(

Regards

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