AVS ***** Member
I'd also suggest you should use the room gain compensation feature, which I think is a high pass filter.
I measured this a while ago on my PB16, I didn't try all the combinations though.
View attachment 3027852
edit: forgot to mention, these measurements were done with DynEQ enabled, so there is some low-end boost added from that...
I assume that is just a single PB16. I'm curious what your room size is? You are getting excellent room gain below 16Hz.