I actually did not know that. I have heard of "BS" the group, and you are correct, I don't recall listening to them, they probably crossed the radio a few times.
Around that period I liked The Allman Bros, Yes, Crosby Stills Nash, the Who, the Guess Who, Emerson Lake and Arnold, and a few others. I liked Mountain as I recall. I'm trying to remember the 8 track tapes I had.
Somewhere around 1973 I bought a half decent stero, a Pioneer receiver and Small Advent speakers, which had a heavy if muddled base, and a Pioneer turntable. I recall later picking up a Shure V15 Type 3 cartridge that was considered sweet, probably 1977. By then I was listening to a lot of classical.
When I started working, I bought some ADS speakers which were a definite upgrade and I think a new receiver, a Yamaha I think, maybe the one I still have. My main setup now is a Yamaha with Monitor Audio speakers. My wife won't let me crank it up very often.