To get over this weird obsession with tiny 10" speakers for bass, I challenge all of you to go to a retailer with good PA gear and plug into a system with some good 15" subs. Compare to your little under- performing 10's and ask yourself why you are using them.When you go to a concert, do you see any 10's in the PA? Nope, 15's ,12's ,and horns are all that are used in modern systems.Guitar players don't even use 10's! Wedges are always 15'or 12's with horns.10's don't cut it!I once used a system on the road with 32x 10's, with 5,000 watts.It didn't come close to my 4x15" Meyer set-up! Bass amps are horribly over priced. You can get great PA gear for less than bass amps!Use a small 1x15 or 18 sub, and put your 4x 10 on the top, bi-amped.I mean a real sound reinfocement sub-woofer, not the junk that Eden and SWR sell! You will thank me, I promise!