The difference between 50 watts and 100 watts is about 3dB, not a big deal. You will be fine as the axiom speakers are very efficient and only require 1 watt to achieve very loud SPL from 3ft away.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85