I am doing a hard right and replacing my carefully chosen component-based home theater system with a more minimal setup.
My loss is your gain! I am selling my Paradigm Seismic 110 Subwoofer. This subwoofer is compact, but produces an INCREDIBLE bass despite its form factor. I bought it new for $1400. It's only endured one move.
Here is a review. https://hometheaterhifi.com/reviews/speaker/subwoofers/paradigm-reference-seismic-110-subwoofer/
"The Paradigm Seismic 110 subwoofer is a freak. It is very small, lightweight as subwoofers go; yet capable of playing very loud, very low, and very clean. It will blow away subwoofers that are bigger, heavier, and in some cases, more expensive. Highly recommended!"