I already have the Isoacoustics Gaia I feet - I assume those should work the same as Townshend to mechanically decouple the speakers from the floor? The speakers have outriggers so I’d need a huge platform and I’d be worried about the added height.
Was then thinking of mass loaded vinyl like Acoustimac under both the speakers and whatever large wool rug I end up with.
I also already have plugs that Eggelstonworks provided for the ports that I use.
Great idea on doing a sound test with the neighbors - will at least give them my contact info and maybe doing a test where i find the volume setting on my stereo that becomes the new “max”. I’m a pretty low-volume listener - my system is designed around that principle from when I was married and my then-wife was sleeping on the other side of the wall behind the speakers.