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Andrzej Sochon 16th November 2007 11:55 PM

Hello from Warsaw, Poland
Hi, I am Andrzej from Poland. I am surprised I did not enter this forum many years ago. Now comes a moment at my life to engage my head with the electronics again and forget about other things, even for a while. I am an electronic engineer but my first experiences dates back to the early 60-ties when I build my first radio long waves transistor receiver using gas burned soldering iron.

In 1999 I made two Son of Zen monoblocks, look at the following link

I have approx. 91 dB speakers: Suspense’93 (kits of Focal speakers) I made housings according to the Mr. Manfred Zoller design.

SOZ sounds pretty good but I am tired of the terrible heat generation. I have a feeling I need something better like A9, f3 or f4. I would like to build one of them, so I will appreciate very much if Forum help me with advices: do my speakers fit new projects, especially f4, where to buy some parts and what to do with buzzing mains transformers.

Kind Regards
Andrzej Sochon

Cal Weldon 17th November 2007 02:40 PM

Hello Andrzej and welcome to the forums. Feel free to ask away in the appropriate sections.

Andrzej Sochon 21st November 2007 06:07 PM

Cal, thank you very much for warm wellcome!

I apologize my faux pas, I should say this a few day ago, but the forum is fantastic and absorbs me completely ...

Kind Regards,


Cal Weldon 21st November 2007 07:02 PM

Yes, many an hour are spent here. I can relate.

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