Isoacoustics Orea vs Townshend Seismic Pod on Components

I have my speakers on springs.  The change in the sound was a revelation.  One of those things that I wish I could go back in time 3 decades and tell myself to put my speakers on springs.  Rubber components dampen, springs isolate.  The most profound effect I found by putting my speakers on springs was reducing speaker cabinet resonance.  Using an accelerometer on the speaker cabinet and the speakers coupled to the floor with spikes- like they have been for decades, I tap on the speaker cabinet  with a steel ball and I can see the speaker cabinet ring for over 2 seconds.  Now I put my speakers on springs sized to have a 3 Hz resonance so that the speakers are isolated from the floor.  I can hit the floor with the steel ball and no vibration is detected on the speaker cabinet.  And then I tap on the speaker cabinet and I see a short pulse and the ringing decays nearly in an instant.  No more interaction between the speaker and the floor.  The sound?  Amazing.  More clarity, sharper focus of images and the bass is clearer and deeper.  Yeah, I really want to go back in time and tell myself to wise up and use springs.

Also, the speakers do not move when playing music.  Verified with the accelerometer.  The cones do not have enough mass to move the speakers.  And even if the speakers moved, it would be at 3 Hz so no impact to the music.

I bought springs from McMaster Carr sized for my speakers and put them under wood platforms.  I also tried Nobsounds on my speakers.  They work too but not as well.  Also confirmed with the accelerometer.  When I tapped on the speaker cabinet supported by Nobsounds with a steel ball the cabinet vibrations took about 1 second to decay.  The music sounded better than with the speakers on spikes but not as good as on my wood platforms with the large springs.

It is spring p/n 9657k409. 
‘This link, if it works goes to that page. 

How much do your speakers weigh?  I sized these springs for my 165 lb speakers to give me a 3 Hz resonance.

Oh, French units then.  I can do that.  
So 4 springs with a rate of 4000 N/m adds up to 16000 N/m and will yield a natural Frequency of 3.3 Hz.  A little bit lower spring rate will lower the frequency some more.   
Some spring mass system calculators can be found on the web to verify the calculations are done right.  
I’m an old Aerospace engineer but I also worked in Automotive so I can operate in both systems of measurements although I think mostly in English units.

@Ryder

Take out as many springs per foot as you can without the two metal ends touching. The fewer the springs the lower the resonance point and better the isolation.

I am able to use a single spring per foot.  Measured resonance is about 4 Hz.

I’d say stay with fewer springs.  That keeps the resonance point as low as possible.    The difference in gaps doesn’t matter.  This is static loading.  The only time the springs move is when you put your hands on the component.  As long as a gap remains once you let go the component is isolated. 

My preamps are unbalanced due to the heavy transformers mounted to one side. So I set them on inert boards and then the boards are placed on the isolation feet. You can’t see it from the picture but the rear feet are positioned inboard to even out the loading. This way I still have the rubber feet on the component in use. I didn’t want to put the springs in direct contact with the chassis. Based on my accelerometer measurements the isolation this way is just as effective as having the feet directly under the rubber feet of the preamp.

Thank you.  I have the matching Ref 2SE Phono pre as well.  I have been an ARC user since the late 80s.  I try not to chase the wind.  I enjoyed my last ARC preamp for 18 years.  I'm very fortunate to have these preamps.  

I find the Nobsounds to be effective isolators.  I'm using large springs on my speakers and amplifiers.  I bought some 1.5" OD 57 lbf/in springs from McMaster Carr for these heavy weight components.

Back in the day Pontiac had their Sport Tuned Suspension and put a STS badge on the dash.  Now you have a Sound Tuned Suspension.