Experience with Townshend Seismic Podiums on Concrete Floor (they're great)

​I have tower speakers on a concrete floor covered with carpet. Recently, I tried out the Townshend Seismic Podium (size 1)  on my Ascend Acoustics Towers (RAAL tweeter) for about 4-5 hours. Here is a brief recounting of my experience.

At first, I set up the podiums and just listened to well known tracks; next, a few days later, I used that same set of tracks to compare, A & B, the speakers on the podium vs. without the podium (but at the same height). A friend with me also compared this A/B setup. We listened to a simple jazz arrangement, a Mozart aria, a rock recording by Chesky, and a country/rock piece. All were well recorded.

The difference made by the podiums are not subtle. In general, it is as if the entire sonic presentation was brought into focus, as if a light veil or layer of dust had been wiped away. It organizes everything; it makes the parts of the whole make sense.

More specifically, these were the effects I noticed: 

Bass was slightly fuller, much cleaner and more distinct; for an electric bass, this meant that rounded notes that previously blurred in a sequence (too legato) become individual notes. String bass notes gained dimensionality and texture; the finger on the string became more real, and the resonance of the large wooden bass got fuller and richer. Rhythm sections were better able to stand out *as* rhythm sections, that is, as musicians who are working together.

As far as midrange and treble go, there was -- as with the bass -- more definition, clarity, detail. They sound more like instruments-in-the-room rather than the presence of instrument appearances. Not much about their tonal character changed, but they became more palpable and more exactly located.

That brings me to the soundstage. The width of the soundstage grew by about 10-14% — 5-7% on each side. It was remarkable. Instruments gained space, separation, and definiteness of location. They didn't sound apart or isolated but just more distinct, separated from other instruments. I imagined this as fidelity to the way the microphone recorded them or as the mixing engineer intended. 

When I ordered the podiums, I made sure to ask for the ability to return them. I was assured that I could return them if I just paid shipping. (No restocking fee.) I was skeptical and wanted an escape clause. I had watched a few videos and was curious about whether Mr. Townshend's scientific claims would translate into audible differences that would be worth the money (the podiums cost about 1/3 of my speakers' cost). 

Well, my skepticism is gone — and it disappeared rather quickly at first, and then after careful comparison. I am keeping the Townshend podiums. Are they better than Isoacoustics footers or other products? I don't know, because I have not compared them. But they're making a huge difference and, should I want to put other speakers on them, they'll fit the others I have, easily. I'm pretty sure I'll never give these up.




...their method of placing speakers directly on the floor was to put a piece of marble under the speaker--so not really sure if it's analogous to carpet on concrete--would love to see if carpeting/pad is considered a form of decoupling and they did measurements on that type of surface.


I agree.

There's still a lot that is unknown when it comes to loudspeaker decoupling.

I guess that anything softer/having less mass than either the speaker cabinet or the surface it's standing on must decouple to a certain extent. 

The big question is how far do you have to lower the resonant frequency between the speaker and it's supporting surface before you stop hearing improvements.

I remember hearing that you need to go below 10Hz to get the full benefit, but I'm not sure why.

In the video Credo used the idea of suspending the speaker from a bungee cord (?) as the reference with which to compare both their own decoupling method and that of Townshend Audio.

I have read many a review about the Podiums and many times they state that you can adjust the height or rake of the speakers with the outside knobs.

I don't believe this to be true. Once you release the spring the speaker will float and just find its equilibrium, or am I missing something?


No it didnt..There is huge differemce in sound quality between the 2...Is adjustable spring tension equal to adjustable resonance tuning? Tom