Granite Slabs

I have a set set of Linkwitz Orion loudspeakers. When I approached the problem of isolating them I tried spikes without a good result. Then I found out that Siegfried Linkwitz himself recommended a slab of 1 in thick felt. FELT said I !!  But being very reasonably priced I bought the material and placed it under the speakers. Who would believe it !  It worked extremely well and is still there!

Not sure that would work with 215lb speakers and carpet?

I would find a stone masonry company that does work for high quality residential builders.

I am guessing they occasionally have offcuts or the cutouts from dual bathroom sinks for example. These would only require cutting to size and edge polishing.

You could also have them drill corner holes to accept threaded lead anchors. Just size them to accept IsoAcoustics Gaia's or whatever you prefer..

@vuch I am in the exact same situation on our second floor as you are.  See my virtual system and posts.  To recap I tried spikes, no spikes, spikes on limestone slab no spikes on the slab and Herbies gliders.  The Townshend Podiums were the thing that worked.  Contact John at Townshend audio for the best pricing.  I also have heard that Stack Audio has some footers that are claimed to work but I have no experience with them.

@goose Nice system! Your rack looks similar to mine.

I love the way my rig sounds. However when you add something new is when you realize it could sound better or not. If I do anything, I’ll probably go with Magico A pods for my A3’s. I have their spikes into the carpeting now.

I noticed you have the Puritan 156 power conditioner. Is it the bottom center piece? How do you like it? What did you have before? What differences do you notice? I’m using a Transparent Powerbank 6 but I don’t think it is a true power conditioner? It seems more like a surge protector.