Originally Posted by
fender3x
I am not sure, but I can guess. Partly I think you answered your own question. They're popular all the time. If I am guessing, looking at their power handling, high xmax, roll off is pretty good, reasonable price...and they sound both in bass cabs and in PA systems. I am guessing it's always one of the best sellers for Eminence for bass. Plus they're hard to blow up.
I don't know for a fact, but I suspect that the "shortage" has to do with Covid. They are in Kentucky which has 6 of the top 10 counties by percentage for Covid Cases in the US. Covid has also directly and indirectly created a nationwide shortage of truck drivers, which is causing slowdowns in deliveries all over the USA. One or both things could be causing the problem.