I knew something was going down when I realized the puzzle has four unchecked squares (that is, squares that only participate in an answer in one direction, not both directions, as is standard requirements for an American style crossword puzzle). But things got complicated for me when I entered MAndeLa at 34A: Who said "If you're not ready to die for it, put the word 'freedom' out of your vocabulary" (MALCOLM[X]). That was a tough wrong guess because three of the letters were correct (and the unchecked one couldn't be, well... checked).
Anyway, I figured out my mistake, and enjoyed the theme. Four answers, all using the central X shape, but in four different ways. We get the aforementioned speaker, but also the NEWYORK[TIMES], [KISS]GOODBYE, and [CROSS]SECTION. That's some good work, finding four answers, all of whom have seven letters outside the X, two with the X at the start, two with the X at the end.
Elsewhere, there are lovely chunky corners, with space for some great answers, including IMBATMAN, NERDCRED (which is what you get for knowing the first one), and ANECDOTE.
Good clues include 12D: What might have a large collection of prints (CRIMELAB) and its partner in crime, 18A: Get cell service? (DOTIME). And how fun is that section in the center East, where FJORD crosses JJWATT?
I also liked the paired clues, such as 9D: Lead-in to T, A or X (MODEL), and 55A: Lead-in to X, Y or Z (GEN); also RESTED and TANNED, which is exactly what I am not, currently.