04-16-15: Geph0007Here's an outside the box thought I bet hasn't been tried: Turn the speakers completely around. As can be seen in Figure 4 of the Stereophile measurements the rear-firing driver provides reasonably flat frequency response from a bit over 100 Hz to well beyond 10 kHz. By firing that driver directly at the listening position, rather than at the wall behind the speakers, and firing the problematic woofer at that wall instead of directly at the listening position, it seems to me that you'll in effect have a completely different speaker, conceivably with a much flatter overall frequency response. And one whose bass response can be tuned somewhat by varying the distance between the speakers and the wall behind them.
I must have not been very clear I did the usual things I worked in the audio biz and I know what to try and do.... I am trying to think outside the box a little.
Regards,
-- Al