please help me!!

[umai2]

hi...
im from malaysia. i have 1pc mackie mixer,2pcs crest audio power amp.LT2000,2 pairs community speaker,1 pc EQ and 1 pc noise gate.
But i still can't get a best sound from it alls.i hope someone can teach me how to perfect connect to alls gadget so i can hear a big & nice sound.