Just for clarity too, I’m looking for improvements on what is already pretty good in my opinion. I think the large space really helps as the low frequencies have to room to be effective and dissipate naturally. When I added the second subwoofer things improved, smoother and more whole room encompassing, I’m hoping for more impact and subtlety. I think adding the second d sub made me rethink placement too which was an improvement.

M60ti Hafler9505 & JFET Pre,Axiom Transformer. M3 Marantz PM7200 Dual 606 Denon 2700 M2 Yammy RX595