Sam here and the fact that 8 track tape is a tape to tape transfer from the master reel to reel tape gives it the edge as far as overall tone and soundstage although vinyl has a wider stereo image it sounds more 2d than 8track 3d soundstage in my opinion.
8-track is an adaptation of the Lear Jet flight recorder, because Mr Lear wanted the cheapest think he could get away with. As it unwinds, it scrapes off the magnetic recording medium, and was not too good to begin with.
The problem with prerecorded tapes, and especially 8-track, is that the tapes are mass produced at speeds that do not transfer well, because the transfer equipment is set up to go as fast as possible. What kind of stereo cartridge are you comparing to 8-track?
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