Hermit Audio

Welcome to the Terje Sandstrøm Audio Technology site

For several years I worked on the design of audio equipment for very high fidelity use, primarily for Electrocompaniet. As I no longer work actively in that field, I’ve put as much of what I know onto this site for anyone to look at.

This site covers the audio technology I worked on, the history of the early Electrocompaniet period from 1975 to 1980 and their “Otala” 25W amplifier, plus schematics, troubleshooting guides, theory articles, my M.Sc thesis on weak non-linearities, and other audio-design work.

My current work is in software development — see my blog for that side of things.