2 major improvements that have left me scratching my head
* I sold 2 SVS powered subs: purchased new 10+ years ago, never designed to compliment a hi-end system, but I thought I needed them as my room is ~ 21 x 35 x 12 (open beam ceiling) with lots of glass front and rear, plus a tile floor, when I had Magnapan 3.5Rs
Also, I had my Emerald Physics 3.4s (2 way) 12" concentric drivers with 1" polyester tweeters sitting on Harbor Freight dollys so I could maneuver them easily, but once I got rid of the subs and moved the 3.4s some 2ft back, wrangling them off the dollys, and onto one toe (OUCH), then placed 4 each loaded Nobsound springs under them, the music became amazingly life-like. My LSA Voyager 350 has a lot more lower mids and bass then I was aware of. In most rooms I doubt anyone would need more speaker than these. They can be found used for under $1000!