Jack- I reread your post on the analog pass-through/analog filter on the 970 and it occurred to me that even though my DVD player has full bass management (with 40-120 hrz range to select from) it may be worth a try to run the 5.1 anaolog output from my source player with all speakers set to full range and let the analog filter on the 970 do the bass management. From a purist's point of view the analog type filter may actually sound better (even fixed at 80hz) compared to the digital 24/192 bass management of my DVD player. I don't know , but plan to find out- Another A/B test is in order. Now if I can only get that darn 12 volt trigger to work ......