Hi Tim,
if we decrease woofer impedance we also need to DECREASE midrange impedance. Not increase.
BUT I think this isn't the right way. I confess that I didn't work on it till now as I have to recone 6 woofers till christmas and finish the cc crossovers for a forum member.
I'll look into at as Giskard does. He or me or we will come up with a solution for sure.
It's a bit of a luxury problem how to substitute 4 1501AL with 4 1500AL in an EV 2 configuration but the task itself should be rather interesting... I guess
To prevent this thread to get too dry I added a pic of the "veneer test" for the EV2 cabinets. Will post more pics.