What one change to your room, system, or setup made the biggest improvement?

Electricity, surprised by my shocking response? ⚡️

@jpan +1 

Coupling/stacking my subs made the biggest single improvement. Didn't cost anything!

Not including actual system components as such, but replacing my wood, then steel turntable stand with concrete blocks. Literally grounded, anchored, and solidified everything in my main analog only system.

Other than components, the things that made the biggest difference were:

Townshend podiums

Quality power cables

Using a laser measuring device to set the distance/angle of my speakers

Gary

Without a doubt, joining this forum and ending up with this