I have 2 M50 is fronts and a VP150 as a center with an HSU VTF-3 MK2 as a sub. Should I set the Axioms to Large or Small? Room size is 15'x15'.
Thanks!

Small. Set your AVR crossover @ 80Hz.

small, even if you had m80's, and like Steve said 80hz crossover.

Thanks for your response! I did what you said and it sounds great.