I have 3 pairs and possibly another pair in the future of these Proficeint AW650 indoor outdoor loundspeakers for a garage and garden setup. [Link: proficientaudio.com]

The speakers are 4 ohm rated and 150 watts.  What is the best way to figure out how much power i need to properly run all these speakers? What is the minimum watts per channel needed for 150 speakers?

Will a "AVR" be suficient or do I need an auxilary amp as well?

-Thanks for any and all assistance!