Mark

I posted before about a Jersey Shore Legend who's still around, Al Rando. I'll just describe the setup he used in the past at a place called PJ Ruggles where I would go see him all the time.
Yamaha TOL organ and two midi controller keyboards. Rack of modules and power amps behind a wall in the coat room. 8 -- JBL 3 way cabinets with 18" woofers in them. Yes that's 8 !!! And because he let people sing with him he had 8 home stereo type speakers on top of the JBL's just for 1 mic. The sound was incredible but under control so I guess back to your question, yes, in the right hands power can work.