Solid State Guitar Amp Forum | DIY Guitar Amplifiers
Solid State Amplifiers => Amplifier Discussion => Topic started by: Zebedee on 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