If there was ever a speaker from Axiom to cause shut downs I always thought it should be the M22s with, as wid mentioned, its very low 2-3ohm impedance at ~4k. I have run my M22s with a few very low end Pioneer receivers and have not had any issues. I have run mine with my Denon 1804, Denon 3808 and my 15 yr old Sony DT915(?), without any issues.

Just to note that you can get the M22s to sound 'fuller' by running a little bass boost in the settings, about 2-4 db works very well.

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70