Regarding the timbre matching, I ran a 160v4 with dual M80v2 for a year. I found no discernible difference other than the fact the 160v4 was miles ahead of the 150v2.

I am of course exaggerating on 72 gauge wire as Blair already knows but I can't fit 16 gauge in there either. BTW, I have used 72 gauge wire in my career for ultra-linear magnetics.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated