It's disingenuous to blame the cab's failure on the tweeter's plastic waveguide. The fiberglass material and mounting technique was inherently unstable. It was destined to shatter -- and buzz. Like Monster, I know this from experience. I had five fiberglass cabs, and every single one failed. So his story is not unique. The whole fiberglass concept was a disaster that could never have a happy ending. But none of us knew that, as we were beta testers on a product concept that was unproven. The execution was flawed and resulting fallout inevitable. It's really too bad. Some of us lost a lot of money chasing that dream. Never again for me! I'm a permanent convert to the stability of wood.