As a pratical matter concrete is not resonant. So long as your speakers are connected directly to the concrete via any type of well constructed and effective spikes, i.e. those that effectively piece carpet and pad and support you speakers firmly, you've done as much as you can do. IMHO, in your situation the fine gradiations in support spike's construction, beyond good support, is sales hype. At least that has been my experience from experimentation and I know of no solid engineering support for products beyond those that can support your speakers and make a good solid connection.
God bless Newbee for being a voice of reason. His advice regarding spikes and concrete floors is very good.
I will also suggest as an alternative...and an experiment...Aurios Pros isolation bearings. There are several Audiogon members who use Aurios under their loudspeakers and swear by the results.
Spikes utilize the coupling theory, while Aurios bearings utilize decoupling theory. In my experience, both techniques can be effective. It might be fun and educational to try both.
I have Thiel 2.4s on a tiled floor and was wondering if I should use something like Boston Audio Design TuneBlock S (for speakers)?
Are there other alternatives to the above i.e footers for speakers with spikes?
Any advice/recommendation would be appreciated.
And, a third path:
Doubled-up Big Tenderfeet placed beneath the bottom of heavy speaker cabinet to separate it from the solid floor.
There is a ninety day home trial period.
Please post which method you end up preferring.
I'm on carpet over concrete slab. I had granite slabs custom cut so that I could experiment with different footers. I'm currently running Herbie's Big Black Dots between the speaker and granite with very good results. As stated, they are inexpensive and all of Herbie's stuff comes with a 90 day money back return, so it's kind of a no brainer. I will be trying Aurios Pro-Max iso bearings, both alone and combined with black dots (had black dots custom cut to fit recessed opening of Pro-Max, 1 3/4") Check out my system for more info...
Herbie's Big Fat Black Dots work REALLY well for me. I don't have a concrete floor however.
OK, what the heck. Sorbothane. 50 durometer. 3/8" thick. Doubled to 3/4" if you so choose.
Years ago, I did the same with circular vibration absorbers from Audio Advancements LLC, seating them within the top of the original Aurios MIB's. It reduced slipping of components resting upon metallic top of Aurios. There was a favorable effect on the "tuning" of the system sound.
Later on, I used the Mapleshade Records type of barely compressible triple layer vibration absorbers resting against both the top and bottom surface of Aurios MIB's.
This had the added benefit of self-leveling the original Aurios design, which otherwise did not provide automatic self-leveling.
Since Herbie's seems so good, by itself, I have not tried it along with Aurios. If your experience is that there is a positive, or synergistic effect, then time to unpack the retired Aurios footers.
I had my Thiel CS 7.2's on a concrete slab. I used Sistrum Sp-101 and never looked back. They come with a 30 day trial offer so you have nothing to lose. Read the latest review here http://www.dagogo.com/Sistrum.html
Fist off thanks for all the great advice and encouragement to go out and try different footers for my speakers. In the end I decided on a few different brands but fell in love with only one- Acoustic Systems. Combined with some other changes I have recently made in my system I am now getting a totally holographic three-dimensional sound that's unbelievable. When I added the Acoustic Systems footers to my speakers the sound I thought could not sound more decoupled from my loud speakers became even more so. Low frequencies become both more dynamic and went deeper and sounded tighter. Also the mid range became more transparent and vocals sounded less chesty. Lastly the highs sounded far more transparent and smoother with fine inner detail that before was lacking (but I never knew it : )
The bottom line? No matter how well set up you may think your system is, or even if like me your speakers are set on a concrete foundation, you can still make significant gains by experimenting with your system- cables, acoustics, cones and speaker feet- you name it. Oh speaking of speaker feet Acoustic Sounds manufacturers these room "resonators" that I simply must try next : )
Leica_man, I am having trouble accessing details, or picture of the exact footers you obtained. Is there a website or dealer address which has more information, pictures, and pricing?
Ooops- my mistake the name is Avatar Accoustics. Here's the link- great stuff.
I finally found something that works and sounds very good at the same time. They are Yamamoto PB 10 footers.
See reviewers comments in http://6moons.com/audioreviews/yamamoto3/footers.html
They are sold in the US by www.venushifi.com and in Europe by www.jacmusic.com at $35 per set of 4.
You should have a look at the new EquaRack Multi-Mount Speaker Mounts. I use their very similar Multi-Mount Footers and they are superb. Here is the link: www.equarack.com