Hi guys, I have a problem 'cos I know nothing about amplification. I have been given a pair of identical 15 inch P.A speakers by a friend and each one can deal with 150 watts at 8 ohms, so I've been told. The brand is OHM if thats any use. I'm currently using a 30 watt combo amp to power these and the result is pretty poor to be honest. My question is, what kind of amp head would I need to get the full potential out of these speakers, and how would I need to hook them up(series or parallel)? Thanks for any help that you guys can offer.