The corporate info page has some history; looks like they're coming up on 30 years

http://www.axiomaudio.com/corp.html

You can see some of the older models here; the speakers were a bit ugly until Axiom started putting the drivers on the wide side of the box ;\)

http://www.axiomaudio.com/vintage.html

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