Start with the basics, thick carpet and a pop corn acoustical ceiling, room measurements that eliminate/cancel standing waves. Then start with various speaker placements, following the one third rule. After that try different wall and corner treatments. Book cases on the side walls work great but try to cover at least two thirds of each wall. After that, its tweak, tweak and more tweak. One neglected issue is the acoustic shielding of the turntable/arm/cartridge. It needs to be in its own 'black hole', meaning no acoustic energy should impact/reach any part of it.
Speaker Placement, Listening Room Design
Any recommendations for information related to designing a dedicated listening room including speaker location, sound absorbing panels, diffusors, bass traps, etc? Thanks, have a kick ass system that I know want to optimize by putting it in a room that deserves it!