“This is the second school I have purchased one or more of these subs. They are reasonably light, they come with casters ready to screw on and they pack a punch. I've had 18" Behringer subs at schools also, the Presonus AR18 are less woofy down and give a clearer bottom end. The 1200 watts give a good high SPL on paper, and so far, I have not had any complaints with Volume. The option to change the DSP is handy as is the phase and firing direction. My only gripe with these subs is the screw-in speaker poles for your tops. It's another cost I was not expecting to have to fork out with a school budget.”