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Discussion Starter · #1 ·
I tried to use 3m 90 spray tack on r13 insulation and the inside of a sonotube with the plastic peeled off and it would not stick well because the insulation sucked up all then glue.


I threw away the insulation becaus eI figured it was not needed then got advice that I REALLY should use something. Now I have the ports and some bracing in place so I can only parcially cover the sides if needed.


I need to know:


1. in a 6' x 25" sono do I need stuffing for standing waves and decay time?

2. Would a rubber coating do the same job of reducing resonance?

3. Is there any other adhesive or stuffing I can get locally at lowes or home depot or michaels (craft chain)?
 

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1. Yes, 6 foot will give you a nasty end to end resonance.

2. Rubber coating will not do it. You could use egg-crate style foam lining the tube, polyfill ( I used whole pillows in mine ) or fiberglass / rockwool.


You would want to keep fiberglass/ rockwool or polyfill in a pillowcase, as it will keep loose fibers from going into the sub driver and also getting blown out the port.


3. Have you tried hot melt glue?
 

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Discussion Starter · #4 ·
Does it need to be end to end? Will doing just asd much as I can do?


Part of my tube (top 2 feet or so) is totally unable to be reached...



Hot glue just seems so weak but I guess... It was always horrible when you used it in school as stuff.
 

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Ideally, you don't want to put things between the driver and the port that will block all free air movement. IE, don't shove your pillows in the sonotube and create a plug; try to pack them around the port. Insulation works well around the walls of the tube because it does not make that plug I was talking about.
 
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