1. Get thee an inexpensive SPL Meter combined with a CD (not LP) with Test Tones (I use 'Amazing Bytes' (a few on discogs now). Use tools 1st, then adjust to personal preference.
2. refine Speakers Location and Toe-In for that space/listening position(s)
3. Vinyl: Cartridge Choice: Prior to sound 'preference' choice:
Wide Stereo Separation and Tight Center Balance specs effect imaging tremendously.
4. Balance refinement, remote balance preferred. A small balance tweak can make a large improvement in imaging.