As I remember most of the time an 8-track tape player blasting in the early 70's era POS GM or Ford cars w/those jensen 6X9 speakers in the rear window deck or inside a Garrard turntable and Marantz 22XX receiver. Saw them on their first tour opening for Black Sabbath in '78 at Baltimore Civic Center....no shortage of Colombian Gold in those daze...LOL