I have a pair of these. They worked really well for 6 months. I was doing an 11 piece horn band and a 9 piece Disco band with ease. And they sounded great. I did have additional sub supports. Recently one started to distort in one of the upper towers when a male was singing. The other developed a loose piece inside. I sent both back for service and they are on their way back to me. They claim to have fixed the loose bit and that otherwise they are fine. Well we will see.
I guess my issue is a lot like the OP. As the gig went on the top would start to distort. Not really bad but a good listener would notice it.
I will write back when I get them beck.
