Just got home. WooHoo!!
First off - this is my new fave combo - MK4>PSP-2>AD2K smokes. Just what I have been looking for.
Ran the PSP-2 at -35db input gain, 0db gain on the output. Ran the AD2K at +24, and peaked at -3. Probably could have bumped it up to +22 but I didn't want to clip - but it appears that I had the headroom. The show was pretty loud, recorded from the OTS behind the board. Would seem that the PSP-2 is putting out ~20db of gain. Can't wait to run it at 24bit (coming soon).
Overall, great sound and great night for taping. Z-Man, Nate, Charles, Craig all in attendance (I know I am missing someone). Great time had by all. Off to bed - first day of work tomorrow...