Whoops... I missed the "dual HP speakers" part...

I still have the occasional urge to saw off the bottom of one of my M5HP pairs then graft on a larger cabinet to get the tuning more like a single-woofer M100.

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8