Last update, and thanks for the input. Got the SB2K Pro, downloaded the app, set the LPF to 64 Hz. I’m happy with the results. It’s actually what I wanted, solid bottom without it being overbearing. I was never crazy about my 685’s. Whole new ballgame now. Played some of San Andreas, good tight rumble without being obnoxious. So now I have to find some good movies for LF content. Any suggestions, or is there a thread here somewhere?