sound deadner inside box!!!

[basscort2009 5,000+ posts]

ok so i was told that this would gain between .3-1 db. anyone ever tried it? the source from which i heard is really reliable but i still am sketchy. anyone know the pros or cons to doing this?

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[Cabin_Pressure 10+ year member]

Good enough for Steve Cook to do ~173 with it in the sonotubes for the 18"s in the Memphis van when it had the 4th order BP. Try it.

 

[Bad4health 10+ year member]

putting something that cancels resonance in something that suppose to amplify resonance...go onopcorn:

 

[basscort2009 5,000+ posts]

any pics of his setup anywhere?

 

[basscort2009 5,000+ posts]

putting something that cancels resonance in something that suppose to amplify resonance...go onopcorn:

kinda wat i was worried about

 

[DonH 5,000+ posts]

putting something that cancels resonance in something that suppose to amplify resonance...go onopcorn:

misconception! works by mass loading a surface such as sheet metal creating a denser surface reducing outside noise and vibration.

 

[Cabin_Pressure 10+ year member]

putting something that cancels resonance in something that suppose to amplify resonance...go onopcorn:

I think the idea is to keep the individual enclosure walls from resonating, which would be at a different frequency than the overall enclosure tuning. That would affect total output. Same concept as using good bracing.

 

[Cabin_Pressure 10+ year member]

any pics of his setup anywhere?

It was a 4th order, with tubes for the sealed chambers..........................how would you even see the inside? You can google it though, there's vids on Youtube.

 

[Rudy 10+ year member]

I'd expect no change at all. The vibration dampers we use as sound deadeners are designed for thin, highly resonant materials like sheet metal and plastic. They will have almost no impact on MDF. If the box is weak, brace it. If the box is huge and the panels are resonating with the frequencies produced by the sub, brace them to divide the panels and raise their resonant frequencies. Very good post on the topic here.

 

[kmanian 5,000+ posts]

It would be much better to simply add bracing to stiffen the walls.

 

[snoopdan 5,000+ posts]

It would be much better to simply add bracing to stiffen the walls.

this, deadening the inside of the enclosure just changes tuning.

so, yeah...its a dumb idea.

 

[basscort2009 5,000+ posts]

well i have 5 allthreads and a 2x4 for bracing. probly one of the strongest boxs for a trunk car. 2 gallons of resing inside and out. built with lots of glue and 2 inch coarse thread screws. i added it anyways and dont know if i gained lol. i broke my windshield so i am leaking air. ill have to wait to see any real change.