Thiel 3.6 and 'grounding' / insulating

Thank you for your response. I will do some in-depth (no pun intended) testing of the bass performance with spikes on quarters. I just needed confirmation of my idea that, by adding a couple of massive slabs of granite, the bass-coupling to the floor would be diminished. I could always move the carper over to the speakers and put the slabs on the carpet, then the speakers with spikes on the slabs. Looks like I'll be shoving heavy boxes around again for a few days, hehe.
Thanks again.

Thank you all for your input.
I'll be receiving the Thiel 3.6's this Friday...no sleep for me this weekend .

So far, I have put the Thiels on the spikes provided by the manufacturer, and put the spikes on quarters. The speakers are well clear of back and side walls (3 or 4 feet from the back wall and 3 or 4 feet from the sidewalls). They are about 6 feet apart, slightly toed-in and 10 feet from the listening position.
The bass has tightened a bit, but I could do with a bit more. I'm looking for a supplier in my area, who will cut me a couple of stone/granite/marble slabs to my specs, so I can play with that.
Any speaker cable recommendations anyone? I'm currently using thick, multi-strand solid core Audioquest cable, with spade lugs added by the dealer.

Thank you. I will look into Audiopoints and Sistrum Platforms. I appreciate your input.

My Amp is a Classe DR 15, 175W/ch in 8 ohms, and doubling all the way down to two ohms (700W/ch in 2 ohms).
The preamp is the Adcom GFP750 in passive mode.
The pre - to - power cable is Transparent Audio, balanced. The cable to the speaker is heavy-gauge multi-strand solid-core Audioquest.

Thanks for the placement feedback. I'll play around with the distance between the speakers...

Thank you. That makes two votes for the 'farther apart' side. I will definitely play around with that (as far as possible in my listening room).

Patrick

No, that's one I hadn't thought about. I'll look into that as well, thanks.