Rob MacKenzie (lead guitar, ex-Leo & Friends, King Harvest, Great Men) and Cleis Pearce (electric viola) were the mainstays.
MacKenzie Theory played instrumental jazz rock with elements of John Coltrane, King Crimson, Mahavishnu Orchestra and Santana.
Their track, "New Song And", was included on the triple live album, The Great Australian Rock Festival Sunbury 1973 which appeared on Mushroom Records in April.
[3] During September, Leadabrand and Majewski left and were replaced by Paul Wheeler (ex-Billy Thorpe & the Aztecs) on bass guitar and Greg Sheehan (ex-Blackfeather) on drums; pianist, Peter Jones joined.
Pearce now lives, composes, teaches and makes art in the Byron Bay area of NSW and has been an artist in residence with Southern Cross University.