Sooooooo, I got around to trying some of the suggestions here.
I removed one of the subs, put the amp in bridged mono and put it on the sofa. I found some affordable speaker stands to separate the subs from the 4208s as well. Also, I bumped the bass levels in my H/K AVR 635 and set the mains to the Small Speaker setting and crossed them over at 80Hz. The sub ended up in a corner right across from my L main as its final resting place.
I'm happy to report that it has never sounded better! So thanks very much to all who helped w/ suggestions and inspired me to spend a little time on this.
Cheers,
Warren