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Old 19th May 2004, 09:09 PM   #1
swest is offline swest  United States
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Default woofer construction question

New to the forum - and this is my first post.

I'm in the middle of a speaker project and am using a Dayton Audio 6.5" woofer (P.E. #295-305 - I haven't figured out how to include an image in my post, so you'll have to look on the P.E. site...)

Anyway, my question concerns that piece of material that is, apparently, glued to the front of the speaker's perimeter. It appears to be plastic, but I'm not sure.

What is its purpose?

And doesn't it interfere with the proper seating of a screw or bolt head when attaching the speaker to the baffle? It seems that if I used a normal panhead bolt/screw the head wouldn't have sufficient shoulder area and would be pulled down to the metal... And if the head of the bolt/screw is supposed to rest on the metal, then why isn't the hole in the plastic (if that's what it is) larger to accomodate the head?

Sorry for such a basic (i.e. boring) question, but I'm 'baffled'...

Thanks.

- s.west
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Old 19th May 2004, 09:42 PM   #2
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Nostalgia?

AFAIK, this is leftover from the old days when drivers were mounted to the rear of the baffle. I'm not aware of anyone that does that now but manufacturers still make it that way. It's not plastic but typically layers of paper that serve as a gasket. Theoretically the sharp edge could cause some diffraction but you'll have more concerns about the rest of your design before you ever get to the point of worrying about that. For now, it's better to have it there than not, IMHO. The most common mounting method is to use screws with t-nuts and a sealant such as rope caulk on the rear of the frame to form an air tight seal around the driver.
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Old 19th May 2004, 10:09 PM   #3
swest is offline swest  United States
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Thanks for your response. Yes, rear mounting...

Since I'm going to flush-mount the speaker (from the front), should this material be removed? Does it interfere with the entire reason for flush-mounting?

- s.west
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Old 19th May 2004, 11:49 PM   #4
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Quote:
For now, it's better to have it there than not, IMHO.
Leave it on unless you have a plan for replacing it with something better. Some have managed to construct flanges but you may want to save that for a future build. Recess the driver so the gasket material is flush with the front baffle. Best way to go 99.9% of the time.
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Old 20th May 2004, 02:41 PM   #5
swest is offline swest  United States
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Thanks, very much, for the advice.

- s.west
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