I got a bag End Q10X-D out of Free-ads. Most of the Bag End posts here talk about the Q10BX-D. Is the Q10X-D an obsolete model. Does anyone know how old it is. Not that it's a big deal. Just curious. Also it doesn't seem to like being driven hard. I put a Trace AH400 into it and at any volume above about 5 on the output level it makes unhappy farting flapping noises. As this is the first 4x10 I've owned I'm not too sure what to expect. But I would've thought it should handle a 400w amp with no problem at all. I've had it checked out at the Bass Centre and they say it's ok. I'd be interested to hear of anyone's experience with these cabs.