box

[67camaross 10+ year member]

just wondering if anyone has ever tried adding pressure to a sealed box like making asmall screw hole pump in air with a bicycle pump then close up the hole. Just wanted to knw if that would affect the sound

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[BonusBobo 10+ year member]

Originally posted by 67camaross just wondering if anyone has ever tried adding pressure to a sealed box like making asmall screw hole pump in air with a bicycle pump then close up the hole. Just wanted to knw if that would affect the sound

It would decrease the excursion on your subwoofer because the cone would have much more pressure pushing against it. But woofers aren't air-tight are they? I don't think they are. At least I know some aren't.

 

[triphop 10+ year member]

what if u vacumm the box?

im thinkin it might sound louder and crappier. with a bit of echo... am i right?

 

[67camaross 10+ year member]

some body has to try it

 

[67camaross 10+ year member]

Originally posted by Jmac Pumping more air into the box would be equivalent to using a smaller box ... No real point ...

so would vaccuming out the air make it like a larger box. not sure if that would work but seems like it would be a good i dea for people with little space if it works

 

[Savant 10+ year member]

Originally posted by 67camaross so would vaccuming out the air make it like a larger box. not sure if that would work but seems like it would be a good i dea for people with little space if it works

I don't think that would be the case.. the sub has to work harder to come forward if there is a vaccume, if you push air in then it's gotta work harder to come in.. both of those actions require the sub to work harder to move, like a smaller box..

And I don't think subs are air-tight either.. the foam around the surround will probably leak over time.. and I'm sure there are little gaps here and there where air can seep out.. and wood doesn't make a good pressure bottle or vaccume bottle..

When you are talking about a 'sealed' box and requiring more power to move the sub becasue of more resistance.. that's mostly from the fact that the sub is moving 'fast' and air can't seep/****** through the surround (or any of those tiny leaky spots).. sealed is relative.. mostly air-tight as opposed to having some escape route for air (dont thin air moves through ports? make some too small and listen to the air noise, or crank a sub and dangle something like string or graduation tassles infront of the port and watch them jump like nuts.. In a sealed box, you don't have air movement like that..

 

[67camaross 10+ year member]

ok sounds right. It was just something i thought of for fun