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Old 18th February 2013, 04:48 PM   #11
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First prize goes to cogitech.


Yay!

My second choice (or first choice if I had some lying around) would be exterior acrylic caulking.
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Old 18th February 2013, 04:53 PM   #12
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Methinks it wouldn't couple well enough.
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Old 18th February 2013, 05:00 PM   #13
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It's not always possible to get deadly tight fit on bracing panels - less and .5mm or so gap isn't enough to get exercised about. As has been suggested, use a good construction adhesive (PL400) and screws - but not drywall screws - they're notorious for breaking.

I'd suggest Robertson brand (square drive) or equivalent Lo-Root wood screws with nibs. Be sure to drill appropriate size pilot holes or risk splitting material on edge grain - not a good thing.

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Old 18th February 2013, 05:03 PM   #14
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First prize goes to cogitech.
LOL

I really did.

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Old 18th February 2013, 05:08 PM   #15
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Methinks it wouldn't couple well enough.
The stuff I am thinking of binds to stuff like tar, firms up nicely into a stiff rubbery substance which is designed to last 30 years in various weather conditions. I wouldn't hesitate to use it in a speaker.
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Old 18th February 2013, 05:14 PM   #16
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Nor would I but I would use it for air sealing not for bonding. Rubbery isn't necessarily good if you are trying the raise the resonant frequency of the panel. Construction adhesive or sub floor glue is good.

DUG get second prize because he is resourceful and frugal.
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Old 18th February 2013, 05:20 PM   #17
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Nor would I but I would use it for air sealing not for bonding. Rubbery isn't necessarily good if you are trying the raise the resonant frequency of the panel. Construction adhesive or sub floor glue is good.

DUG get second prize because he is resourceful and frugal.
I think the (very firm) rubberiness (sp?) would help to eliminate resonant frequency (rather than raise it). It would work like a shock absorber of sorts, as it is pliable but moves incredibly slowly. Not anything like silicone, which is "bouncy". That would be a bad choice, as it doesn't adhere to wood very well, either.
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Old 18th February 2013, 06:17 PM   #18
chrisb is offline chrisb  Canada
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Nor would I but I would use it for air sealing not for bonding. Rubbery isn't necessarily good if you are trying the raise the resonant frequency of the panel. Construction adhesive or sub floor glue is good.

DUG get second prize because he is resourceful and frugal.

I'd still use screws in combination with the adhesive, and leave them in place.
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Old 18th February 2013, 06:19 PM   #19
chrisb is offline chrisb  Canada
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The stuff I am thinking of binds to stuff like tar, firms up nicely into a stiff rubbery substance which is designed to last 30 years in various weather conditions. I wouldn't hesitate to use it in a speaker.

SikaFlex?
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Old 18th February 2013, 06:35 PM   #20
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SikaFlex?
Can't remember the exact product name right now, but I think I still have a tube at home.

It was either DAP Dynaflex 230 or DAP Alex Ultra 230...

I think an even better choice would be DAP Premium Polyurethane Adhesive Sealant (which is virtually the same thing as SikaFlex, AFAIK).
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