I've been playing an Orange OBC 410 for quite some time. I've noticed, however, it's way too heavy. IMO a 410 shouldn't weigh that much, it is overbuilt for a light gigger. I'm looking to build my own cab with my father who used to build PA systems. I'm thinking of going with the Beta 10a, that's what the Orange uses. A friend of mine who really knows his stuff, but is horrible at explaining told me to stay away from the Beta's because the 'xmax" is only 3mm. Not sure what this means. He's the kind of guy who's right 90% of the time, but 10% of the time, he's dead wrong. Can someone explain what this means and if the Beta 10a will be a good driver to build a box around.