Just curious, my neighbor has a nice pool with Brick pillar surrounding the pool which I think would be perfect place to carve out some holes for speakers. All construction discussions set aside, if I had say 4-6 outdoor speakers setup, how would one set that up on the receiver?

No particular speakers just plain ole outdoor speakers, Say I want my source to be A/V receiver in the house. These would be plugged into the B speakers (not spliced together, I assume that would be bad news ).

Would it take a separate amp coming out of the receiver to split the sound to all speakers? What kind of product would do that? If I'm wrong with the setup how else could this be done?

Thanks for feedback.