I got a mesa powerhouse 4X10 that ive had for almost 4 months. Its started making a buzzing noise but its not overbearing its just noticeable. it does it mostly on the higher strings and the low B string still comes in nice and clear. Could this be a setup problem on my bass. I run a hartke ha 3500 through the cab and ive never turned it up past 3 on the volume. I wouldnt think that would damage the speakers especially in the short time ive had it. Any help on this would be greatly appreciated.