If you hopped into your time machine and brought back audio gear- what would it be?

One or two (ok, two) gaylords* of assorted/various Telefunken diamond bottoms. Super select versions only.

*(Gaylord is the original name/brand for the triple layer super strength giant cardboard packing boxes you see sitting on and occupying a full size shipping skid/pallet) (like ski-doo and kleenex, which are brands, not items)