All joking aside and not mentioning the exceptional musicianship of Bonham and the rest of LZ,hats off to the extremely creative recording genius. We are spoiled today wit all sorts of peripheral gizmos to process sound. Sometimes, I think that takes some of the magic out of it (or maybe puts too much false magic into it.) The recordings of Led Zeppelin depended on "real acoustic" sound rather than simulated. Knowing and using a space, understanding how sound travels and just damn great skills and craftsmanship
resulted in that signature sound.
.....and THEY OWN IT by the way.
Wicked great musicians is the other requirement.