Granite Slabs

You would think that spikes on a cement would be good... they are not. They couple them to the ground and allow each other (speaker) to effect the other one. The seismic activity in any area is significant... I have a seismograph which shows how quiet it is at night... but also how walking hard across a cement floor actually causes vibration. Podiums barely raise the speakers (if you are using spikes... they raise them not at all. 

@thecarpathian I was having a little fun with photoshop there.  That's my face on a Talosian from the pilot episode of Star Trek. Real hat size is 7 3/8.

@buellrider97 You spent $13K on Quartzite?  My travertine tiles were < $20 and were the perfect size, requiring no cutting.  I would not say they made much difference, my Arendals are 111 pounds and with SVS SoundPath feet there's not going to be much vibration transfer.  I did see a small improvement on the subwoofer however, using a 18x36 slate tile.

So what is best to do if you have carpet on the 2nd floor of a wood framed house? I have the spikes in the carpet without the little disks that go under the spikes.

I’d been considering A-pods but haven’t done anything yet. 

@skeptikal ,

Well, you did a great job, looks really cool! Great two part episode.

@skeptikal . Sorry I wasn’t more clear. Yes I spent that amount for my kitchen counter tops. If you go to a stone store , or a granite fabricator you can get remnants for pennies on the dollar.