I used to be a semi-regular listener to Mad Dog Radio when I had SiriusXM, but I couldn't never take listening to Russo for more than 30 seconds because of that voice of his. Dino Costa, who used to be a host on Mad Dog Radio (his show used to follow Russo's) would rip on Russo several times directly just for that very point.
This is quite similar to his previous ESPN Radio deal, where the show originates from NYC but also simulcast in LA. ESPN has a second LA outlet with KLAA that airs the other national stuff that KSPN doesn't.