Check out Dave Mason's version on "Certified Live". He wrote the song (when he was in Traffic), but it's not a duplication of the Traffic version.
The Grand Funk version is really cool for a slowed down feel....and I agree, Mel Schacher is a great bassist with a well defined line for the song.
Three Dog Night "Live at the Forum" has a cool rocked-up version, but the bass is kinda buried in the mix and a bit difficult to hear clearly.
Tweeters in a bass cabinet? Sacrilege