OK,
So I got home and busted out some Costco yellow towels. I plugged both the ports on the S60 towers. I ran Audyssey for a quick 3 point to see if it worked. Checked the settings and wam the deep valley was gone. oh yes. So I ran Audyssey again for the 6 point test. Freaking fridge kicked on in the middle of the test. so the left speaker is dipped hard on the lower end but comes up quick @ the 80hz mark. see attached
Audyssey set the speakers to small and crossover @ 60 with the towels in. I played some U2 is was nice and clean no boomy bass. Did the GoT battle for black water and oh yeah it's sweeter than it was.