Hafler Circuit

Hafler Circuit A simple surround-sound ambiance-simulation technique developed by David Hafler in the 1960s, and made available from his company, Dynaco, in a device called the Quadaptor. It basically used a left-minus-right extraction process with two-channel source material. Unlike some more complex and effective extraction technologies such as Dolby Surround, the Hafler circuit did not require additional amplification for the surround, “ambiance” channel. Ferstler Howard See also Ambiance…