So when albums were produced and mastered back in those days they would intentionally back off on the treble and the bass to make the album sound better when the DJ at the radio station would play it over the FM airways. Mass production would also degrade the quality of the albums. ...
4 guitar tracks with compressor, Session Drummer 3 track with verb, 13 vocal/harmony tracks with compression and v-vocal running on some clips all routed to a vocal sub-out with vx64 vocal strip doing its thing, 2 bass tracks (one tube overdriven) compressed, hi-pass filters...