I just bought an aguilar gs115. It sounded perfect in the store--I hooked it up to three different amp heads, and it sounded sweet with all of them. But when I get it to the rehearsal space, plug it in, and slowly turn up the volume, it sounds like crap. The low end buzzes, and it's not a good buzz. The high end is fine, but the lows sound like they're almost flapping (it's almost sounds like there's a hole in the woofer). There's no hole, though. What could this be? Here are my thoughts, none of which are well informed: (1) the speaker or driver could have "broke" during transportation--does this ever happen? I rolled it on its casters over some small bumps, but I didn't think that would hurt it. (2) my amp head isn't strong enough to power the lows. It's a 300watt Laney (circa 1980) and has seen a lot of use. It powers my Peavey 1516 just fine though. Can somebody help me out here? I'm pretty frustrated. . .