Right, Troy; when you set the M80s "Large" in the MRX500, all of the main channel bass goes to the M80s, not the subs. The subs would still get the LFE that's occasionally present during movies, but of course music has no LFE channel, so the subs would get no bass in music. The setting has to be "Small" with a crossover frequency for the subs to get the lowest bass(as they should). Keep the small/60Hz setting, or if anything, manually raise the crossover to 80Hz, to give the subs more work where they do best.
