I think Axiom just cycles through the different speaker models over a period of several weeks to maintain inventory, so the lead time from F.O. for any particular speaker depends on when they are next planning to build them.

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8