I'm shopping around for 4x10s and 2x10s and was looking for technical info (sensitivity, frequency response) for the new Mesa Boogie cabs. I even called their tech line and was told "we don't keep track of that kind of information, we just design by ear." Does anybody know any of the specs on these cabs other than the fact that they weigh a ton? 82lbs for a 2x10 and 111lbs for the 4x10! What are they making those things out of? Depleted Uranium? My achin' back! Thanks.