Something i have looked into is the antimode 8033 which can equalize your subs automatically and will work with 2 subs. I have a denon amp with audyssey multi eq xt and i have had good luck with it equalizing both subs. I seriously doubt anyone could tell if both subs were not the same brand. My subs are not the same brand as my M80's and they interact just fine.As we all know a crossover point is not a brick wall.

DOG is GOD spelled backwards.
What others think of me is none of my business.
M80 V3 MY GLOSS Cherry