It was no accident that residential architect Mark Cronander, aka Variac, scheduled the Sixth Burning Amp DIY Fest for October 28, on the same weekend that the AES Convention (Audio Engineering Society) took place in San Francisco. Not only did Cronander attract a fair number of new folks who came into town for the convention, but he also scored, as a speaker, class-D amplification expert Bruno Putzeys of Belgium's Hypex Electronics.
Burning Amp drew close to 200…