Hesitated to post this because the guy who helped me was a nice dude and it was one of the more pleasant Mullet (Guitar) Center experiences I've had, but what the hell. It was amusing nonetheless. So last week I'm in my local Mullet Center trying out cabs and i noticed that they had some Behringer cabs. I'm averse to Behringer, but that's not the point. The point is that the guy helping me is also averse to Behringer cabs because, as he put it, they have "some sort of proprietary impedence or something". He stated that Behringer cabs are only designed to work with Behringer heads because he fried a different brand head by plugging a 4-ohm and an 8-ohm Behringer cab into said different brand head (which had a minimum 4ohm load rating). When I mentioned that he was exceeding the limit of the head and that it had nothing to do with any sort of "proprietary" equipment issues, he sort of stammered and said something about the weirdness of the 4ohm 2x10, blah, blah. Now, I know that impedence can (but really shouldn't) be confusing, but come on. Dude works in a G-u-i-t-a-r C-e-n-t-e-r. Shouldn't a salesman know something about impedence before frying the inventory and then telling customers that a cab won;t work with a different head because of his failed, ill-fated experiment?!?