Dynaco

Label of Dynaco that had releases in the Dynaquad quadraphonic format. Based on David Hafler's circuit, it was a passive decoding method. The decoder that would be used for this was the Dynaco QD-1 Quadaptor. In hi-fi magazines, the decoding method was often referred to as "The Halfler Dynaco method. David Hafler died on May 25, 2003 at age 84. Like Peter Scheiber, he was an early pioneer in matrix type multi channel sound