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Eyelets and Rubber Grommets for decoupling speaker drivers?

 
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Parts
Senior Contributor 100+


Joined: 13 Jan 2006
Posts: 174
Location: Edinburgh

PostPosted: Thu Apr 24, 2008 1:08 pm    Post subject: Eyelets and Rubber Grommets for decoupling speaker drivers? Reply with quote

Hello all,

I am after some metal eyelets and rubber grommets for decoupling speaker drivers from cabinets (and also to decoupling hard drives in the computer).

This is the sort of thing Kef used to do years back, the eyelets Kef use are quite tough and seem to be made of steel. The mounting hole in the B110 type midrange is slightly larger to accommodate a rubber grommet, the eyelet is inserted from behind into the centre of this grommet, and the mounting bolts tighten the grommet against the cabinet, leaving the driver decoupled but sealed.

Does anyone know what I am on about and have any idea where I can purchase such items? I think the mounting bolts are M4 or M3 but not sure?

Thanks,
Steve
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ColinR
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Joined: 31 Jul 2004
Posts: 1175
Location: Staffordshire

PostPosted: Thu Apr 24, 2008 1:53 pm    Post subject: Reply with quote

Get 4mm steel eylets from your local sewing emporium.

M4 bolts from your bolt supplier (Screwfix?) for B110B, M3.5 were used for B200G.

Grommets from an automotive bearing, o-ring, rubber belt, bush supplier so you can squeeze before you buy and take a pattern. Most are too hard if you buy from RS, Farnell, Maplin, etc.

I bleated at KEF some years ago and got 20 of the proper B110B rubber bits, dunno where the envelopes gone though Sad .
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speakerguru
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Joined: 18 Nov 2005
Posts: 959
Location: Green Hut, Tovil

PostPosted: Fri Apr 25, 2008 11:14 am    Post subject: Reply with quote

Yes, I know exactly what "you're on about" Wink .

I can confirm that the screws were M4. The eyelets were what you might find in a haberdashery. They were not magnetic so were most likely plated brass. KEF used to buy the grommets from RS. At that time they were the very soft PVC type (not rubber).

Happy hunting.
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Parts
Senior Contributor 100+


Joined: 13 Jan 2006
Posts: 174
Location: Edinburgh

PostPosted: Mon May 05, 2008 9:12 pm    Post subject: Reply with quote

Hello all,

Thankyou for the sewing/haberdashery tips guys I got suitable eyelets.

Still to get the grommets but now have a bit of an idea what I'm looking for.

Black full thread M4 bolts with allen key heads I have not found yet. Would like these for all the drivers including the four bass drivers of the Kef R105.4.

Steve
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