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Post by Hexspa on Jul 17, 2016 14:27:44 GMT
Hi. How concerned should I be about my speaker stands being somewhat wobbly - aside from them toppling over, of course. I mean, I know this can compress and rarify the waves but... I guess I could measure this using a sine waves and checking the tuning..
Aside from conducting an experiment do any of you have knowledge on this?
Thanks,
-m
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Deleted
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Post by Deleted on Jul 17, 2016 15:40:01 GMT
Unless you can break the laws of physics - your stands will be fine..
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Post by Ethan Winer on Jul 19, 2016 20:06:15 GMT
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Post by Hexspa on Jul 20, 2016 4:59:19 GMT
Steve - the doppler effect IS physics.
Ethan - I did but I inferred it to regard isolation; I'm speaking of greater distances of travel rather than just transference. Besides you mention that the stationary resolution must not exceed an 1/8th inch because the room response will change. That is yet another factor.
So I can assume that yes, wobbly speaker stands are no good. I don't know how much mine move, only that they've been knocked over by the cat at least once. I call from my desk up a "no chon zone" (I call cats "chons") so that shouldn't be a problem. I hadn't considered that a moving speaker would relate to the room's response - I was only considering a doppler effect. Hence, yes, I have eliminated transference of resonance as a factor due to your diligent - and much appreciated - research.
Sorry if I'm incoherent and moody - it's bed time.
Thanks,
-m
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Post by Deleted on Jul 20, 2016 7:11:58 GMT
Well now, maybe I need to go back to school, but I rather doubt that.
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Post by Hexspa on Jul 20, 2016 23:43:28 GMT
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Post by Deleted on Jul 21, 2016 9:03:41 GMT
Honestly.
I know what a wobble is, and I understand Doppler & Red/Blueshift.
Vibration is a different matter, but hey ho.
Enough from me.
Probably different ways of saying stuff.
I won't charge for that.
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Post by rock on Jul 21, 2016 21:12:52 GMT
A discussion physics could be interesting but the simple solution, (if there actually is a problem) obviously is to build a sturdy stand. I built some at a custom height many years ago out of 3/8 and 3/4 plywood scraps. They still work (and don't wobble  Cheers, Rock |
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Post by Deleted on Jul 21, 2016 22:04:09 GMT
Jellies wobble - i.e., oscillate slowly in an uncontrolled manner. Usually very slowly - i.e. - less than 5hz.
Getting a speaker cone weighing a mere few grams to induce said wobble would - seriously - be possible?? How?
Now getting them to vibrate at doppler frequencies - ?
Different thing.
At least from where I am.
But, as I said - different ways of saying stuff..
And yes, I did wonder about why use wobbly stands if they caused consternation.
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Post by Hexspa on Jul 21, 2016 23:35:57 GMT
Budget.
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Post by rock on Jul 22, 2016 11:09:03 GMT
For cheap wood, the Home Depot stores in the Chicagoland area sell "cull" lumber for 10% or 20% of the original cost. When I'm in building mode, I stop in whenever I drive past the store and check to see if they have any thing I can use. Many times there is nothing but sometimes you get lucky. In any case, I would not worry to much. Now on the other hand, maybe you can devise an experiment to measure the wobble and it's audio implication?
Cheers,
Rock
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Post by Hexspa on Jul 22, 2016 15:34:26 GMT
For cheap wood, the Home Depot stores in the Chicagoland area sell "cull" lumber for 10% or 20% of the original cost. When I'm in building mode, I stop in whenever I drive past the store and check to see if they have any thing I can use. Many times there is nothing but sometimes you get lucky. In any case, I would not worry to much. Now on the other hand, maybe you can devise an experiment to measure the wobble and it's audio implication? Cheers, Rock I might. However these speaker stands are also too high so I'll probably make some at some point. The budget factor was awhile ago when I purchased these. I used to go to the Home Depot off North Ave back when Transitions was over there. -m |
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