What commerical audio system tweaks provide sound quality improvement??


If you look in any audio catalogue, whether Music Direct or Audio Advisor, there are usually several pages of  system tweaks.

What  tweaks in your opinion, work and actually provide real audible improvement??

Thank you , SJ

sunnyjim
@sunnyjim you may as well try the isolation platforms under the speakers and see how they sound to you! It should be easy enough to tell by looking, though, if the added height will be a problem in terms of tweeter height. But a couple of inches shouldn't matter I would think
Stillpoints Ultra 5's, Ultra SS and the minis under components and speakers. Amazing!!!