Thiel 3.6 and 'grounding' / insulating


I have a lovely old house with hardwood floors. I just bought a pair of Thiel 3.6. I plan to use the stabilizing pins / spikes provided with the speakers (probably put the spikes on quarters or something). My question: would it be worth my while buying a pair of thick (2 inches or so) granite slabs to put under the speakers with the spikes? Has anyone tried this and if so, what were the results? Thanks.
pvanosta
Thank you. I will look into Audiopoints and Sistrum Platforms. I appreciate your input.
Mine seem to sound better 8 feet apart as opposed to 5 feet apart. Toe in mainly if your are having problems with early reflections from sidewalls. Did you try the Sistrums? I'm curious about those devives after reading the thread. I just got my 3.6s on 12-4. Quite a step up from the CS 2s I had been using since 1985. I think I need better electronics now...sigh.
Just curious Pvanosta, what is your amplification? I will say in my experience with my 2.2's, speaker cable of a heavier guage does work best for the bass, but only in terms of tonality, quantity, dynamics, and extension - lighter guage cable will just shortchange the speakers and give a thinner, less developed sound. The bass being somewhat 'loose' is probably a function of the amplifier chosen, and the 3.6's with their larger bass driver and radiator, and lower impedance dip, are tougher in this regard than mine. Since you don't mention it, I assume you don't consider this to be a potential culprit though, but then again there are many 3.6's out there in the world which are not partnered with truly adequate amps (or cables).
Pvanosta, I've had 3.6's for about 3 years now and find Goertz MI2's to be a nice match, Thiel does also. These cables give a more fleshed out, full bodied presentation in my setup. Also these speakers respond to every inch you move them which can be maddning. I currently have mine 9 feet apart and about 4 feet from the front wall and 3 to 4 from the side wall - which allows me to point them straight out with no toe in. This gives me a very wide seemless soundstage - the speakers also sound more open, less boxey when placed further apart - but YMMV
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...