Bermuda Triangle Band's wild psychedelic and delicately nuanced electric autoharp and transcendental vocals grew out of the late 1960s folk rock scene. With an independent attitude, eccentric style and highly unusual instrument lineup, the group was unprecedented. Psychedelic rock autoharp was then-unknown, and at the time (with the notable exception of Carol Kaye), there were very few women playing bass guitar. Since the formation of the band in 1967, its only constant members have been Roger Penney and Wendy Penney.