I think what I am doing is referred to as passive bi-amping. I saw it defined like this in an earlier post on this site:

<<<Passive bi-amping refers to running two amplifier channels in parallel without an external crossover. For this, you leave the internal speaker passive crossovers intact. This offers the benefit of increasing total power, but basically nothing that will significantly affect the sound quality.>>>


4 M80s/VP150/EP600/Denon AVR-5308 & DVD-2910/
2 QSC SRA3622(1100wattsX2)/Carvin 1800HD(600wattsX2)