Most Effective Tweaks

just tagging this one

Vibe isolation like cones or platforms.$1K plus power condtioners (cgeaper ones just are gloiified protection).Heavy stands even for florstanders.Note tha in 80's and 90's verybody who owend B&W's (and the 801 was best selling audiophile speaker of all time) all had Sound Anchor heavy iron stands..Not just monitor stands but Bob Warzalla can sell you bases that add mass and decouple speakers from floors which can have huge improvement especially with wood floors.His stands are great to but many now prefer ones with each shelf having a point and recepticle for each shalf.Still the Sound Anchors can add vibe killing mass andf then you just use cones/points under the hsleves.Willing to try a lo but too much snake oil (bottle of stones ,little clocks or like Shakti Stone or cables that cost insane porices I avoid.Have to keep cost effectiveness in mind.
Chazz
Chazzbo

Acoustic fiber fill wrapped around the whizzer cone in Fostex drivers to stabilize the cone.

You probably already have them, but if you don't, get dedicated lines. I think they are the biggest bang for your buck available in Hi-Fi.

Now for a controversial suggestion - get your cables burned in on Nordost's new Vidar system. I am likely to labled as a sucker for audio voodoo by suggesting this, but I can only say it really works. I NEVER would have believed it, but people I trust told me to try it. They were right - my cables sound dramatically better. Please don't ask me to offer any logical explanation for why running a computer programmed pattern of frequencies through my cables for four days should make them sound any different - they just do.

I have put either Maple shelves (where they would fit) or smaller Maple blocks under everything..... It has made a big difference under some stuff, small differences under others.... All for the better.

Chris