Who knows, first I'll run some REW measurements and see what comes out of the new 2000s.
Then if I'm really ambitious I may add the HSU's back in to see what I can make them do.
All kidding aside, I'm not really too positive on that outcome. I got the sealed SVS's in hopes of tightening up the deep bass over the ported HSU's, besides getting deeper extension from larger 12" 2000's. Maybe adding the HSU's will just add back in some sloppyness from the ported design?
Maybe sealed vs ported sound is just subwoofer "ole wife's tales" lore?
I use the system for listening to Movies/TV only around 10-20% of the time, the rest is Music and it's sound quality takes the highest priority.
What the hell do I know, I'm just a car/motorcycle mechanic?
I do have old-damaged ears buts that's mostly in the high end, the bottom end still comes thru pretty dang good.