Here is my situation, I currently run a 5.2 system.
My 2 subs are: Martin Logan Grotto (10") & a B&W AS2 (10").
I have an opportunity to sell my B&W AS2 & am thinking about buying an HSU MBM-12 (mid-bass module 50hz-150hz) Eventually i want to have an MBM-12 & 2 ULS-15 subs. But in the meantime how would the MartinLogan Grotto & HSU MBM-12 sound together. The Grotto has a rated response down to 22hz.
With the MBM behind my couch & Grotto up front by my mains, would this be a good buy?
(There are photos of my system under MembersGalleries "Timoteo"s 683 Theater" if those help)