Around 7 as a first pass to get them reasonably flat. To get them where they were in the pictures, which is probably a bit of overkill, 13 for the 600, 14 for the SVS. I configure the Left channel for the 13 and right channel for the SVS in the BFD so that I don't have to change any settings when doing A/B testing.

Once I pick one, I will use the R&L channels to tune whichever sub I keep and my Earthquake sub to give the best smoothed response throughout the room with the two running together.

Epic 80-800: HG Cherry