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.

 

128x128hilde45

Showing 11 responses by hilde45

@jtcf Between the detailed and earnest comments here and the reviewers I found online who were not just cheerleaders, I thought they would be worth a serious trial. they did not disappoint. I suppose those with Isoacoustics or other solutions might make the argument that I could have done the same thing for about 1/3 the price, and I cannot rebut that without a trial. That said, I like the look of these podiums and I like their easy, 4-way adjustability and the fact they have a platform. 

@carlsbad It took me a while to see this point -- specifically, that the fact I had concrete floor did not obviate the usefulness of the podiums.

Thanks mapman. So  Isoacoustics stands+ Auralex Subdude platform. What do those cost, together? Still a fraction of Townshend but these things add up.

@ozzy — thanks for the link to your review!
@relayer101 — I saw someone on another forum asking about down-firing ports. I can’t remember what they said, so you might need to search the web a bit on that question. It’s a good one.
@snilf — I got a nice deal from their representative that made it more affordable, FWIW. Still a lot more than the Isoacoustics — and way more than what you have! If I had not liked them, I would have simply paid shipping to return them. I’m selling another piece of gear to (mostly) cover the cost of these. Now that I know I want to keep them, that is. The reasoning I couldn’t escape was this -- "Whatever these cost, they’re still maximizing money spent on everything else." The only question was, "Maximizing by how much? 1% 5%?" The answer is hard to put in percentage terms but was basically, "By a degree I’ll find impossible to forget if I send these podia back."

As @brownsfan and @smandlej point out, the wood floor situation makes the podia even more relevant, so another reason I’m sticking with these is that they allow me to move my speakers to another room — or use the podia in another room — without having to consider another solution.

I want to add a shoutout to @millercarbon who wrote accurately and articulately about these products a while back. At the time, I was nowhere near having a system together, so the very idea of spending $1k on platforms seemed beyond the pale.

@surfcat "Makes me wonder if every single system, especially those with floor standers, would automatically benefit."

I have to say I agree. 

My challenge, as a true blue skeptic, is to keep listening critically. Am I in an infatuation period? Is my thinking and hearing clouded by the sunk costs fallacy? I am trying to be open to the idea that all of this is confirmation bias. I suspect that's not true, but I've not had it a long time, yet.

I read the Townsend website write up on their seismic pods and sorry not buying it.

....Speaker interaction with suspended plywood floors is a very common and way more significant acoustic issue. All one has to do is jump up and down in a room and see if anything moves or vibrates to know.

@mapman By "it" what are you referring to? The seismic factor alone? What?

@brownsfan noted three types of issues -- without mentioning the seismic one:

  1. movement of the speaker cabinet back and forth and side to side due to Newtonian action reaction caused by the driver motion
  2. cabinet vibration also due to the drivers motion
  3. floor resonance being transferred back and forth between the speaker and flooring until it finally dissipates.

You are using Isoacoustic isolation and you say they help. Might the Townshends simply be doing what those devices do?

Are you mentioning "jumping up and down" on the floor as an adequate test of whether the kind of vibration capable of smearing midrange and treble are is present? It seems too crude a test, no? Not sure what the geology textbooks say on that one.

@brownsfan  Good point. Type 4 (seismic) is part of type 3, and would be small in comparison. It would be nice to see an interview with a speaker maker that addressed these vibrational issues in these terms. 

@benzman  -- I love your description and it is certainly what I heard, especially: "My biggest takeaway from them are the space around the instruments and not only the depth of the stage but the actual placement of the players. Live recordings are especially impressive as you will hear the audience in front and the singer a few feet back and guitar player a couple more feet back and to the left  and the drummer 12 ft behind the singer but 8 ft behind the guitar player etc. I guess you would call it layering . 
All the other goodies apply, texture in vocals, improved bass control, etc."

@prof 

Unfortunately I found they weren't to my taste.  I lost a bit too much "room feel" in the bass and they changed the tonality a bit more than I wanted

Good evidence that (a) the room-speaker dyad is a huge factor which cannot be predicted with certainty and (b) that taste is the final arbiter.

@sokogear 

I learned of a great company called Symposium acoustics (on Audiogon) that makes multi layered platforms that can go under anything and also makes roller blocks that serve a similar purpose to podiums.

Fantastic post! Threads (like mine) about a specific piece of gear are most useful when others chime in with what worked for them. Your example is great because it's clear that your choice is accomplishing similar physical results with similar sonic improvements. At the end of the day, I would love to conduct experiments comparing different products to see which one has the best "bang for the buck." Without that luxury, the next best thing is to hear thoughtful and descriptive accounts such as yours. 

@cd318 Thanks. Just watched that video. Very interesting and it seems to advocate for both their custom product and Townshend. @brownsfan may be interested in this one.

@wyoboy First, thank you so much for your kind comments. Much appreciated. I would keep my eye on what @brownsfan writes, as he has more succinctly analyzed the physics involved than anyone else.

Today I will be experiment with adding weight/mass to the top of my speakers while they are on the podiums to see what that does. If I hear nothing, I will say nothing.

Regarding tweeter height, it adds about 1.5 inches or so. That might matter or it might not. It will change how the speaker reflects in the room (first and distal reflection points) but that may not matter in your room. In addition, it’s not that hard to raise one’s seat, depending on the impact on Spouse Acceptance. Raise the speakers, raise the seat -- if that makes any difference.

Remember, too, that the podiums can be adjusted for rake angle, too, by lowering the front two knobs. That may correct the angles in play for the tweeters.

@laynes I didn't have any odor at all on mine.

I agree with you about the "laugh out loud good" assessment.

What I'm curious about now -- if anyone is still reading this -- is:

QUESTION: Do you mass load (put a weight atop your speaker) in addition to the podiums?