Has anybody experienced any defective speaker problems with Mesa Powerhouse 115's? I bought a brand new one about a year ago. Sounded great, easy to handle. Been using it with an Eden WT-800 at very reasonable volume levels with passive Fender jazz 64 CS relic, '65 Precision with PJ active EMG's, playing mostly blues and variety dance cover band. Instance #1 about 4 months ago - blues gig at normal volume, cabinet just quits, tweeter still working. Local Mesa service center ordered replacement. They said it was a defective speaker. The speaker cone had separated from voice coil and the coil was not burned. New speaker arrived, they installed it, brought it home, plugged it up at normal volume and it buzzed. I took it back to service center and they order another speaker form MB. It worked fine for about two months. Last week I sprung for a new Mesa M6 Carbine. Took it to my weekly blues gig last Thusday at normal volume. (On new M6 gain at 10:00 o'clock, Master at 10:00 o'clock, active switch engaged, with '65 Precision w EMG PJ) The same thing happened in the middle of my gig with my new amp. Speaker just quit. The tweeter still works. Worked the rest of the night with Mesa M6 running through an unused Yamaha 18 sub. I am wondering if Mesa received a bad lot of 15" speakers from Eminence? It is back to the service center tomorrow. After three bad woofers I am getting a little "gun shy" about a speaker that I love the sound of when they work. Any feedback is appreciated.