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Polytone amps

Started by Zebedee, September 22, 2026, 10:58:16 AM

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Zebedee

September 22, 2026, 10:58:16 AM
A detailed history of Polytone amplifiers, drawing on vintage catalogs, ads, manuals, interviews, and other primary sources.


https://yitzz.substack.com/p/polytone-the-little-black-box-behind
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