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Post by MikeMusic on Feb 8, 2022 16:53:20 GMT
Max Townshend used inner tubes on one of his isolation bases....
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Post by karatestu on Feb 8, 2022 17:02:10 GMT
Max Townshend used inner tubes on one of his isolation bases.... Yeah, that's what my diy effort uses. |
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Post by petea on Feb 8, 2022 19:03:24 GMT
Max Townshend used inner tubes on one of his isolation bases.... His very first it seems. And one of the early applications was to isolate radar equipment in a RAF reconnaissance aircraft he once told me. One of his main objectives for the Podiums was to eliminate the influence of micro-seismological background on the bass response of a speaker. The improvement of the driver responses was a side-effect of that it seems, as was the prevention of bass transmission through the floor. He own system was above a restaurant and his speakers were pushing 2 m tall and highly focussed. They couldn't there them downstairs (wooden floor) and in fact you could barely here them when you left the living room. |
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Post by MartinT on Feb 8, 2022 19:20:13 GMT
I still think thick draught excluder strip may be worth trying and would give the driver better support.
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Post by MikeMusic on Feb 8, 2022 21:14:01 GMT
I still think thick draught excluder strip may be worth trying and would give the driver better support. Surely not strong enough ? |
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Post by MartinT on Feb 8, 2022 21:31:21 GMT
The driver's laying on it, forming a seal that should also dampen it. Worth a try?
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Post by MikeMusic on Feb 9, 2022 10:00:03 GMT
For sure
Check regularly to see if it flattens
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Post by karatestu on Feb 9, 2022 16:57:23 GMT
I am going to try a few different things to provide the what ever it is. The only way to truly isolate is via an inner tube with a very low resonant frequency. Anything else is only going to be less effective as far as I can see. For the inner tube to work I think I will have to add a substantial mass to the back of the driver's magnet. Like a solid metal ball with a flat side which attaches to the magnet.
This inner tube idea is in my head the solution I most want to work. But I am prepared for failure and will try other things if that happens.
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Post by Slinger on Feb 9, 2022 20:04:49 GMT
Could you alter the resonant frequency of the inner tube by filling it with something other than fresh air, water for instance, or in t'other direction, Helium? Sorry, I thought it was about time I tried chucking a cat among the pigeons, this thread is far too sensible, and you blokes are all nodding sagely and agreeing with each other. This is a hifi forum, there should at least be " factions," and swearing, and stuff.  |
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Post by MartinT on Feb 9, 2022 20:36:01 GMT
Go the whole way and fill it with mercury, then..
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Post by karatestu on Feb 9, 2022 20:48:01 GMT
Hey, I never knew you could like your own posts  |
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Post by MikeMusic on Feb 9, 2022 21:18:52 GMT
Fill it with helium *That* will change the sound  |
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Post by karatestu on Feb 10, 2022 5:41:54 GMT
Fill it with helium *That* will change the sound  Will Barry White sound like the Bee Gees ? |
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Post by MikeMusic on Feb 10, 2022 9:42:57 GMT
Fill it with helium *That* will change the sound Will Barry White sound like the Bee Gees ? If you are really lucky |
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Post by MartinT on Feb 10, 2022 10:25:23 GMT
Going back to speaker isolation, it's interesting that the benefits are not just in the bass region. I heard all kinds of improvement in midrange clarity and treble extension which are a surprising outcome of isolating a large and heavy speaker.
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Post by karatestu on Feb 10, 2022 17:20:55 GMT
Going back to speaker isolation, it's interesting that the benefits are not just in the bass region. I heard all kinds of improvement in midrange clarity and treble extension which are a surprising outcome of isolating a large and heavy speaker. It's all across the board for me. It is an amazing thing and after all these years of believing that speakers had to be heavy and almost bolted to the floor I feel like a bit of a muppet now. I also believed drivers should not be allowed to move at all and that has turned out to be a complete load of bollox as well. The first music I played after doing it (and last before) was Donald Byrd - slow drag. A wonderful album in every way. I thought it sounded superb until hearing the effect of isolation. Donald's trumpet felt like it had taken off and was flying like a byrd round my room. There are too many improvements to mention, to repeat that old cliche - playing every album was like hearing it for the first time. Rediscovering my record collection. You might gather I am well impressed. |
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Post by MikeMusic on Feb 11, 2022 10:55:05 GMT
Think we were all spikers before we discovered isolation
Spikes seem right, isolation counter intuitive to me
I remember having speakers on carpet. Rubbish
Put them on spikes, nice step up in sound quality
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Post by MartinT on Feb 11, 2022 11:06:46 GMT
I, too, used spikes in the early days. It was only when I started experimenting with washing machine feet and then proper Podiums that I questioned all the disinformation about speaker rigidity, and what spikes do under speakers and in system racks. They always seem to create a bright sheen to the proceedings, fooling the listener into thinking there is more detail. I believe that they actually obscure detail.
My simple rule is NO spikes anywhere in my system. Either use sorbothane (cheap solution) or the much better Black Ravioli (not inexpensive).
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Post by MikeMusic on Feb 11, 2022 11:14:20 GMT
The BR pad for spikes is an interesting one  |
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Post by MartinT on Feb 11, 2022 11:19:45 GMT
That might offset the badness of spikes without having to remove them.
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