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In the Forum: Horn-Loaded Speakers
In the Thread: Rakeshorns
Post Subject: About the resonance frequency of frame and the wheelsPosted by Romy the Cat on: 10/21/2011
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 oxric wrote: |
| Of more importance to me are the resonance frequency and sensitivity to environmental vibrations of steel especially in a monopod configuration. |
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Well, the resonance frequency of frame is the subject sucked out of nowhere. I can’t not even begin to tell how irrelevant it is. BTW, if, a big if, you feel that it is important to you than metal frame has much more flexibility to moderate resonance frequency. A 3 by 4 metal frame can care humongous wait, including bend and if you willing to tinkle with resonance frequency then you can fill the hollow 3 by 4 metal frame with sand of even with led shots. Warn you: when you put all your horns on the frame it will be so heavy that you will be laughing that you ever thigh about resonance frequency. The few grams of decagrams in those channels will be nowhere close to be able to excite the mass of the entire assembly. Sure, it is a free country and you might do whatever you wish, you might even initiate a group resonance frequency calculation, but I think that it has absolutely no practical meaning.
One more thing. You and Jessie and a few other folks that I have seen make the bottom of what I call “Horns Island” (in analogy with the air carrier deck) with wheels. This is certainly a very good decision BUT only if you not doing to use carpet. You see, the wheels work on carper if they are relatively large, let say 4-5 inch. It is how they are depicted at your sketch. However, you might discover in future that as you install your speaker in final position then you do not need the wheels anymore. Furthermore, in context of the permanently installed Horns Island the wheels might be a bit too utilitarian not to say ugly. You might not be able to remove them as your midbass will sink too deep. So, you need to devise some kind of idea that would take advantage of the wheels and then, after the final position is find would allow you to remove the wheels one by one, preserving the speaker found final location. I wish I thought about it when I was designing my Macondo frame….
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