The Search for Musical Ecstasy (Book One: In the Home) - Harvey "Gizmo" Rosenberg. 1993, Image Marketing Group. A devotee of engineer Julius Futterman, pioneer of the output-transformerless (OTL) amplifier, Rosenberg made his indelible mark on the high-end industry as owner of New York Audio Labs. Never Read and in New Condition. 365 Pages - Softcover.