Meanwhile, I have used the double IC on a very heavy hitter speaker system with outstanding, nay, spectacular success. I will say this; it was paired with the previously mentioned Benchmark AHB2 amplifier, and the result is glorious. Other amps tested to follow.
The outcome of all this is so far beyond expectations. I'm still looking for input from another manufacturer to see how far I can take this. This is no minor improvement, this is an ultra-efficacious method.
(For those just joining, please see the discussion on appropriate systems for use with Schroeder Method. Do not presume any and all rigs are appropriate. At this point there is in place a caution regarding class D amps. That may change in the future, but not at this point. This is a do at your own risk activity.)