#1
could someone explain a PA system? i know the components are a mixer and speakers, my band might need one soon, but is it just for mics? im just confused and would love some one to clear it up haha. thanks!!
#2
PA system's are used for everything...not just mics..

bigger systems usually mic drums, guitars, bass, and vocals..(or whatever you want to put into it)

like, my band, i mic our drummer's kick drum, and then the guitarist's and bass guitar cabinets, and the vocals.

it depends on what size of system you go with..

how big of places you planning on playing?

Alex
Guitars:
Schecter Omen 6
SX Telecaster
Rogue Deadnought
Squier J Bass

Amps:
Peavey TKO 115
Line 6 Spider III 15 watt
Fender Rumble 15

Drums:
Yamaha, Lugwig, Pearl, CB Drums
Sabian Cymbals
Yamaha Hardware
#3
wow. im stupid haha ummm not too big yet but im guessing a 5 channel system would be enough? how many speakers do you guys use?