fact33Proper room treatment with acoustic panels, corner blocks, traps ect work a treat.
I purchased an 11 piece Kit from a reputable company
Better improvements with the treatment than most of us hope for when we change Preamp, Amp, or Speakers. Doubt no more !
Just stay well away from expensive BS snake oil voodoo things like Shun Mook pucks, little dots, little bags of rocks and those expensive little HFT things, they are just a money grab aimed at the gullible, who couldn’t be bothered doing the work with proper acoustic treatment.
And get the acoustic panels, corner blocks, traps ect from places that sell them for recording studios cheap. Like this one in Australia, There are even cheaper ones.
https://www.selby.com.au/catalogsearch/result/?q=acoustic+foam
Cheers George