 Both Pete Townshend and John Lennon had 3M 8-track machines in their home project studios c. 1969-1970.Ampex began mass production of their competing 1-inch eight-track MM1000 in 1967.One of the first 8-track machines in Los Angeles was built by Scully Recording Instruments of Bridgeport, Connecticut and installed at American Recorders in late 1967.