I am a music listener rather than a collector despite having 25,000 LPs, 7,000 CDs and 7,000 78s.  I have a high end system but not close to SOTA.  My listening room cost twice as much as my equipment and was custom designed by Acoustic Fields.  It is a multi-"laminated" design with no openings (doors are also 16" thick of same design) with multi-cavity interior, activated carbon chambers.  Basically, built-in bass traps.  Bass is deep and smooth.   The room is tremendous.  Looking to upgrade to Von Schweikert VR9 Mk II speakers soon.