Hi, i was wondering what kind of amp i should get to power just 2 apx-152's. i was going to use these cabs as mains along with a yamaha 300 watt powered mixer for monitors. how much watts per channel do i need to efficently run these? What im worried about is the headspace. ive been recently running these speakers through the yamaha mixer and i havent had much room for alot of vocals. I currently only run 2 or maybe 3 but ive been noticing that the amp clips when you have all three guys sining in it. Im in a band with 2 guitars a bassist and a drummer. 3 of us sing. My mixer is the yamaha one with 300 watts per side at 4 ohms. any recomendations at somthing cheap and powerful enough for running booth speakers? I also want to eventually run maybe the bass drum through it too. Thanks again!