Bottlehead Forum
General Category => General Discussion => Topic started by: John Roman on July 13, 2012, 03:25:06 PM
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What in the world??? Saw these on @ http://www.partsconnexion.com/CONNEX-76147.html (http://www.partsconnexion.com/CONNEX-76147.html)
So just how big a magnet does it take to "levitate" my 80 lb. speakers :)))))
John
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I didn't see a weight rating. I suspect that there is a narrow range of weights that the magnets will stay in the cylinder without coming out the top or bottoming out.
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Those damn things had better levitate for $150! Ouch.
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Ive seen similiar from Clearaudio but at something like $200 EACH :o But I think they are made for components, not speakers.
Edit ... Found them ... 12 lbs each and a whopping savings if you buy 3, only $499 for the 3 set ;D
If they really do 12 lbs each, you could probably "levitate" a pretty big floorstander for a couple grand. Per each. ;D
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I'm sorry guy's, my "timing" must be way off. I really meant this tongue in cheek. Comedy is an ongoing project, like my speakers!!!
Have a great weekend,
John
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I took it that way, I couldn't bring myself to buy these or the old Aurios either. Another Bottlehead told me to try buying 3 dished cabinet knobs and 3 ball bearing balls. Set the knobs on the shelf and a ball in each. Then carefully lower my SACD player on top. The audio cheapskate's Aurio. I think Aurios have disappeared, but they were all the rage a few years back.
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I took it that way, I couldn't bring myself to buy these or the old Aurios either. Another Bottlehead told me to try buying 3 dished cabinet knobs and 3 ball bearing balls. Set the knobs on the shelf and a ball in each. Then carefully lower my SACD player on top. The audio cheapskate's Aurio. I think Aurios have disappeared, but they were all the rage a few years back.
But they dont levitate so what good are they ;D
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Desmond,
The Aurios were concave inside with a ball, so the component kind of floated. They were just, yet, another device to "isolate" your components.
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Desmond,
The Aurios were concave inside with a ball, so the component kind of floated. They were just, yet, another device to "isolate" your components.
I know. I was being sarcastic, thus the use of the emoticon. ;)
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Actually, these things do work as advertised -- just go out and get two sufficiently powerful neodymium magnets and try to push two like poles together and you'll see just how much repulsive force they can muster. That doesn't justify the prices though, and I happen to be firmly in the camp of drain the vibrational energy out of the component rather than the camp that says to trap it inside with soft feet and isolation devices that isolate the component.
Give it a path to go through and a sink to disperse it.
That said, I do have a magnetic levitating tonearm on my TT.
I know this was all in fun, but these things do work for isolation -- but not on everything and best with things with a fairly even "balance" to the component. I'd think BH paramour and paramount amps should work nicely with these as they do balance very well .
-- Jim
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I'm using some these for my speakers:
http://herbiesaudiolab.net/spkrfeet.htm (http://herbiesaudiolab.net/spkrfeet.htm) The "giant fat glider's"
I must admit though the magnet idea is attractive, especially for my FP3 and P-mounts. Now I'm learning something about magnets, thanks
for leading me down this path......way cool!
John
PS here is a pic of a magnet that I have on my fridge that is undoubtedly the strongest I've ever encountered. Anyone recognize where it may be used?
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Magnetic is likely from a computer hard drive.
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Some type of magnetic brake pad?
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The magnets are used in the voice coil assembly used to move the head in a hard drive. Yea, break pad, for stopping the drive head quickly.
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I'll guess it is part of a magnetic clutch -- they are being used more and more frequently in wind turbines these days, but they've been around for a long time.
-- Jim
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Yea, and folks are mining these out of old drives to make home brew wind machines.
Do a search for "Wind Generator with Hard Drive Magnets"
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Cool stuff gentlemen,
I thought they might be from a hard drive. But these bad boys are way strong. Sure would put the "brakes" on. My technical experience with drives is minimal but what about the potential risk of data erasure or corruption upon exposure to a magnetic field? This must require a much greater field strength or perhaps a different type?
John
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Good question about the magnetic field. I have a colleague at work that has one of these stuck to his metal wall at work. He did a lot of hard drive testing in a past job. I'll ask him tomorrow. The magnetic is very hard to pull off his wall.
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Wouldn't it be really easy to make a set of those magnetic feet? Two strong round magnets and an appropriately sized tube (plus a hacksaw to cut it to the proper length) and you are there. Hmmm, how strong are the magnets at Home Depot?
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In response to John's question about the 'corruption upon exposure to a magnetic field'
The drive head voice coil magnet assembly has two pairs of magnets and a bucking coil.
This similar to a shielded audio speaker that has a bucking magnet (a smaller magnet with the opposite polarity) glued on the main magnet. The magnetic field is canceled outside the drive head voice coil assembly.
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Oooooo... I like bucking coils! And, NO, that is not dirty!
Craig and I are from heavy industry. Paul Joppa from Aero/Space industry.
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Hell, lets just get it over with and use electromagnets with variable strength.
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That's what I was thinking Greg. Actually I have thought alot about using maglev technology for a turntable main bearing. It would require some serious shielding to keep it from interfering with the signal.
Cheers,
Shawn