Isolating Transmission Line speakers from floor

Andrew, I hate to tell you this but, even if you were to hang those speakers from the ceiling the bass would still pound the people below. Maybe a little less but not much. I lived in an apartment building for years and even with concrete floors I got complaints from the people all around me. The solution to your problem is to get yourself out of apartments. 

Townshend Podiums are the high sound quality solution. Expensive, but worth it. But you want an inexpensive solution, Nobsound springs. $30 per set of 4. Springs are highly effective. The bass sound will still be in the room, but the majority of mechanically transmitted sound will be way down in level. Also if you go with Podiums they will clean up your bass so much it will be hard to believe.  

Either way, Nobsound or Podiums, they will work as beautifully on concrete as wood.

Gday, thanks for your replies.
I should’ve added, the speakers are rather large floorstanders, also, the rental is a house with holiday houses either side of us. So neighbor disturbance isn’t an issue.
The Townshend option looks very good. Only raises the speaker by 20mm. The height rise increase was/is a concern.
Aren’t you allowed to post images on this forum?
Cheers Andrew

Unfortunately the only way to post images is on your system page. https://systems.audiogon.com/systems/8367  You are right, Townshend Podiums only raise the speaker very little, less than some spikes even. Mine are for Moabs, about 150lbs, they can make them for just about any size/weight.   https://www.audiogon.com/listings/lisa8e18-townshend-audio-seismic-isolation-podiums-size-4-570mm-43...

Being on springs the load should be balanced, which for most speakers the drivers being on the front brings the center of gravity forward, which you balance by having the speakers a little further towards the back. Your transmission line may have enough baffles inside that this is less of a shift. Not a big deal, they can also be adjusted level, just something to keep in mind.  

John Hannant helped me with mine, gave him the speaker weight and measurements, the result you can see, looks like they were made for em. 

It is possible that spikes reduce energy transfer (extremely small contact point) but more likely they allow better coupling (especially on the carpet) to the floor.  As long as floor has lower resonance point than 20Hz it will reduce speaker vibration (added mass).  I use spikes, but in apartment building I would definitely use vibrapods.