It's cool you kept all the quad stuff. I had an old fisher unit that iirc had tubes in it. I did not want to invest in a bunch of quad format media so off it went cheap in a yard sale.
I have but did not mention it above is a nic revox B77 an several reels full of obscure early rock and broadway stuff I need to transfer to new tape. The McIntosh gear I bought came in a rack full of the R to R and a bunch of dbx noise reduction and equalizer components, pre dolby items. I thought I might mess around with it. I prefer the "sound" of the old stuff (have tested it on the same speakers. Digital music has noticeable chop and does not seem to flow as well.
I've run the youngbloods R to R, vinyl and cd on the Mac, the sony and new yamaha (through the ryans and there are distinct differences on each.
Music is great and timeless, find something you like and listen, sure helps without creating media's current noise and distraction.