rubberized spray?
Printed From: the12volt.com
Forum Name: Fiberglass, Fabrication, and Interiors
Forum Discription: Fiberglass Kick Panels, Subwoofer Enclosures, Plexiglas, Fabrics, Materials, Finishes, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=35093
Printed Date: April 29, 2024 at 1:24 AM
Topic: rubberized spray?
Posted By: dontknow
Subject: rubberized spray?
Date Posted: July 05, 2004 at 8:47 PM
Im building my box tomorow...Now i read somewhere that is good to cover the inside with a rubberized spray? Is this something I should do... and Just in case this matters the box will be made of MDF only and is for 1 12" sub Thanks, Rob
Replies:
Posted By: defective
Date Posted: July 06, 2004 at 8:19 AM
don't wastetime....not relevent...some people like to rhinoline the outside for looks(  ) but theres no need to put it inside. -------------
Posted By: audioconnection
Date Posted: July 06, 2004 at 8:43 AM
sometimes depending on the sub and power it will have it can help to do this. as when done right, meaning when you use plenty of spray and lay it on thick, it will "deaden" up the wood or make it stiffer. and this will help with negative waves inside the box. this is something you would do if you are really into sound quality. or if you trying to get a little more SPL out of your sub.
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remember...Friends Dont let friends Install, Take it to a pro..
Posted By: CarAudioHelp
Date Posted: July 08, 2004 at 10:20 AM
Just use polyester fiberfill (polyfill). It's much cheaper at about $2 a bag and works great.
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Posted By: tylertime
Date Posted: July 12, 2004 at 10:00 AM
what about for inside a fiberglass enclosure?? i saw somewhere that it will help make it sound less...hollow or something?? any thoughts?
Posted By: CarAudioHelp
Date Posted: July 12, 2004 at 5:26 PM
Same thing. Use polyfill.
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Posted By: dpaton
Date Posted: July 20, 2004 at 10:37 PM
tylertime wrote:
what about for inside a fiberglass enclosure?? i saw somewhere that it will help make it sound less...hollow or something?? any thoughts?
Using Line-X will greatly increase the dampening of the enclosure walls, but at the cost of weight. Basically, it'll make less of the sound come from the box and more come from the cone. It's a good thing. And no, polyfill can't give you the same effect. When it comes to making bass go where you want it, the only option is mass. If you surf around their site, you can read the white paper about why the Pentagon is using it to bomb-proof cinderblock walls. It's good stuff. -dave ------------- This is not a sig. This is a duck. Quack.
Posted By: archemedes
Date Posted: July 21, 2004 at 12:52 AM
rubberized undercoating won't do much it doesn't have the mass. See how it sounds first then if you need to add sound damping (that's the purpose of the undercoating stuff) add something then, poly fill is a tuning aid
Posted By: dpaton
Date Posted: July 21, 2004 at 1:05 PM
archemedes wrote:
rubberized undercoating won't do much it doesn't have the mass. See how it sounds first then if you need to add sound damping (that's the purpose of the undercoating stuff) add something then, poly fill is a tuning aid
My experience with Line-X (Herculiner/Rhinoliner don't have enough density and their Youngs modulus is too low) is somewhat different. It's a dense elastomer, and when applied properly it does a lot for creating a multi-layer dampening system out of the box. The "rubbery" mass absorbs the vibration, preventing the woofer's backwave from interfering (as much) and providing a great amout of help to the dampening of the enclosure walls. It also dampens the natural resonances of MDF very nicely, making it even more dead than it already is. The knock test is one of the most revealing for this. The Line-X'd boxes I've built go thud, the uncoated ones go crack and ring for a while. I'm a fan of spraying it inside both boxes and vehicles. Yes, it adds a significant amount of mass for a thick application (3/16"-1/4"), and yes it really does the job. It beats the pants off of the asphalt mat products on the market, as well as things like Deflex, etc, especially for what it costs.
-dave ------------- This is not a sig. This is a duck. Quack.
Posted By: pureRF
Date Posted: July 21, 2004 at 1:30 PM
In my fiberglass box i just sprayed about 2 cans of walmart brand bed liner on the inside of my box to make sure everything was sealed tight and to help with any extra dust i may have missed.
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dream it, build it, fiberglass it
Posted By: archemedes
Date Posted: July 21, 2004 at 10:25 PM
under coating and bedliner are 2 very different items under coating has a consistancey of oatmeal
Posted By: pureRF
Date Posted: July 21, 2004 at 11:01 PM
ya they do.
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dream it, build it, fiberglass it
Posted By: tylertime
Date Posted: July 22, 2004 at 5:38 PM
ok so if i'm a cheap and lazy guy (just sayin if) is bed liner or undercoat better for my fg box??? of course i mean the spray can stuff
Posted By: dpaton
Date Posted: July 24, 2004 at 11:13 PM
tylertime wrote:
ok so if i'm a cheap and lazy guy (just sayin if) is bed liner or undercoat better for my fg box???
of course i mean the spray can stuff
It's likely the answer is neither. Undercoat has next to no mass and a very low elasticity. Most spray-can bedliners are pretty awful for elasticity as well. Spend the $50 or so and get it shot by your local Line-X guy or build it dead enough that you don't need to.
-dave ------------- This is not a sig. This is a duck. Quack.
Posted By: tylertime
Date Posted: July 25, 2004 at 1:28 AM
ok that makes sense!! maybe i can goto the electronics shop and buy a can of sound suppressent spray like liquid dynomat... gotta be better than plain old undercoating and its about $30 CDN
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