everything mainly depends on the price, but I had the best luck with 1500rms in recommended size boxes from DJ. I had a single 15 in 5cubes tuned at 35hz and it was pretty loud amp was american bass xd3000. I like american bass amps, hints the reason I am buying 2 off this forum. The pa amp would be fine just keep the gains down and tune your whole system proper. example turn the deck volume up to your optimal listening then start adjusting your gains on the amp to where your satisfied, normally that wont pass the 3/4 mark, but I like to stay at 1/2.