OHM: The Early Gurus of Electronic Music: 1948–1980

OHM is a well-researched 3 CD compilation of early electronic music, complete with a 96-page book and a transparent slipcase. The OHM wordmark was inspired by electrical schematics such as the one of a theremin used here on the cover. The plastic sleeve alludes to the old glass tubes used in analog radios and amplifiers.