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Old 20th February 2013, 01:56 PM   #11
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Quote:
Originally Posted by Kindhornman View Post
T-nuts have the greatest chance of falling out
Quote:
Originally Posted by Enzo View Post
In the trade me stake the T-nuts into place with a small screw on the edge of the flange


Yup, whatever floats the boat. You can also use a dab of subfloor glue, epoxy or WHY. Mind you I would only use them if they were laying around, I wouldn't buy them when there are threaded inserts as previously mentioned.
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Old 23rd February 2013, 03:55 AM   #12
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Thanks everyone for your input.

Crisb, glad to hear that you've seen this and thanks for providing a brief description. My build is an OB and that's why I posed the question. I've spent a couple hours pursuing some OB photo sites again looking for a good example and have come up short.. Based on this I'm drawing the conclusion that since so few are using this technique it may not be worth the effort.

Thanks again for all the replies!
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Old 23rd February 2013, 04:37 AM   #13
Enzo is offline Enzo  United States
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Not worth the effort or no one wants to go first.

I have never seen a speaker mounted by its magnet myself, but I work in pro audio, perhaps it happens more in hifi. That said, I have seen compression drivers mounted to a wooden frame with the throat just sitting in the throat of the horn molding, but I think that is a different situation from a woofer.


But dare to lead, come up with pros and cons. Just what benefits might this alternative provide? And what are the negatives? Thinking from my own experience, mounting speakers the conventional way, using screws through mounting holes on the frame edge, offers some plusses. They all tend to have a more or less standard hole pattern, allowing speakers to be changed readily. Also, the speaker will perforce be held tight to the baffle, reducing potential for buzz and vibration. And it is utterly simple. I would think the magnet clamping hardware would have to be relatively complex, and considering the variety of shapes and sizes of magnet structures, keeping it adaptable might be a challenge. Maybe not though.
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Old 24th February 2013, 07:50 PM   #14
tvrgeek is offline tvrgeek  United States
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Besides T nuts (I have had hurricane nuts twist), I have used well-nuts. These are a expanding rubber plug with a brass insert. I press in my T-nuts with a c-clamp and epoxy.

Doing a magnet mount is sure possible. I have seen this done on mid-woofers, but not on subs. I don't think it is as much an issue.
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Old 28th February 2013, 08:35 PM   #15
chrisb is offline chrisb  Canada
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Quote:
Originally Posted by mnsouthpaw View Post
Thanks everyone for your input.

Crisb, glad to hear that you've seen this and thanks for providing a brief description. My build is an OB and that's why I posed the question. I've spent a couple hours pursuing some OB photo sites again looking for a good example and have come up short.. Based on this I'm drawing the conclusion that since so few are using this technique it may not be worth the effort.

Thanks again for all the replies!
Marko

I dunno about not being worth the effort, and never having tried it myself, can only assume it would be a bit of a bother, depending of course on the dimension / geometry of the motor / frame assemblies.


This is about as close as I ever got, which was fun enough, and don're really want to think about sculpting a full cradle mount for something like the Lowthers
Attached Images
File Type: jpg Bud's Bamboo 002.jpg (367.4 KB, 76 views)
File Type: jpg Bud's Bamboo 003.jpg (339.4 KB, 72 views)
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Old 28th February 2013, 10:11 PM   #16
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Very impressive chrisb! ...love the idea of a "full ranger" OB combo. As I get more experienced/knowledgeable with this stuff, I'm thinking that design will see it's way onto my bucket list.

Are you limiting the LF driver passively and running the Lowther full range? What is the base driver?
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Old 28th February 2013, 10:18 PM   #17
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I don't see any wires so it must be Wifi.......!
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Old 1st March 2013, 02:37 PM   #18
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Kindhornman, don't ya love the new technology...the cable debate now turns to air quality

I see that you've been involved with speaker design and plastics.
Have you ever worked with "Corian" a Dupont product?
Marko
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Old 1st March 2013, 03:23 PM   #19
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I haven't personally but it has been used quite a bit. Google it.
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Old 1st March 2013, 06:45 PM   #20
chrisb is offline chrisb  Canada
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Quote:
Originally Posted by mnsouthpaw View Post
Very impressive chrisb! ...love the idea of a "full ranger" OB combo. As I get more experienced/knowledgeable with this stuff, I'm thinking that design will see it's way onto my bucket list.

Are you limiting the LF driver passively and running the Lowther full range? What is the base driver?

system belongs to Bud Purvine - used with woofers consisting of dual SDX7s per side in TL enclosures

the lower driver in photo is Eminence Beta 8 - the exact details of XO I'm not familiar with (or maybe Bud has described it, but it when in through one ear and ... )
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