percy or any box builders, help me out.

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Jun 17, 2002 | 09:08 PM

#16

Percy

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From: Illinois

Quote:

Originally posted by DJ SprinklesNJO
stevie, ur doin fine, its not ur words its jsut some things we dont understand yet. all this techincal talk.

DJ,

You may want to try it WITH and WITHOUT fiberfill. Reason being is that without fiberfill, I've noticed that the bass will sound "hollow" and tend to "echo" within the enclosure itself. Without the fiberfill there's nothing to slow down the backwave. So, it literally just bounces all over the place.

The only box I've messed around with was a sealed enclosure. Big difference with the fiberfill.

Give it a shot and let us know what you think!

Percy

Jun 17, 2002 | 09:23 PM

#17

DJ SprinklesNJO

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From: New York

cool, will do percy. thanks for the info. another thing... this polyfill and fiberfill etc. to find a substitute, (i mean really cheap) will home insulation do the same, i mean the stuff used for houses that u can find in home depot. it looks similar to some stuff ive seen in dj cabinets. just not sure if the fibers are the same and act/provide the same dampening. also how about this stuff, and carpet insulation, or expand foam in a can (stuff that expands 3 times it size to a styro foamy substance) to insulate door panels and wholes in the doors. will that help a little. im not looking for a dramatic effect like dynomat would do, but just some moderate change.

Jun 17, 2002 | 10:03 PM

#18

stevie

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From: uk

Jimmy - You have to use a material that will absorb the sound. Carpet insulation (the foam rubber type) won't do that. Expanding foam won't either. All you will do with those is reduce the size of the cabinet.
Fiberglass roof insulation will do at a pinch in a sealed cabinet. I wouldn't use it in a reflex, as the stuff has a habit of floating out through the ports and eventually lodging in your lungs.

Stevie

Jun 17, 2002 | 10:17 PM

#19

DJ SprinklesNJO

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From: New York

thanks stevie, but im talking about using it more in the doors and floors. spare tire area as well. i get some vibration, more like alot of rattling from my front doors so i thoguht the expand foam from a can would stiffen up the door pods and prevent the bare sheet metal from rattling more. also let me get this straight... so insulation material like for homes, like the polyfill will dapen sound a little. or jsut slow down the waves. in a sense isnt that lowering and preventing sound.

Jun 18, 2002 | 12:31 AM

#20

stevie

Driver

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From: uk

DJ, I thought we were talking about damping inside a cabinet. Stopping vibration and rattling is a completely different thing. Don't put any polyfill or fiberglass inside your doors. It will just soak up moisture.

To dampen rattles on metal panels apply a damping mat like Raammat or place adhesive foam in between parts that are rattling together. It shouldn't be necessary to dampen the doors if you are using the speaker pods, as the sound is contained inside the plastic enclosure.

Stevie

Jun 18, 2002 | 04:34 PM

#21

Ag02M5

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From: Texas

As long as the subs are identical and you are running the exact same signal and power to them (mono), there is absolutely no problem in doubling the volume required by one. But I still would separate them for structural rigidity of the box as you want to remove all resonance.

Late.

Jun 18, 2002 | 07:54 PM

#22

Kyle Harty

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From: MN

DJ, you can get pillow stuffing from Walmart for about $1 a pound that is the same as the polyfill for inside the enclosure. You might want to buy 3 lbs. and experiment a little. The general rule is to use 1 lb. per cubic foot of box volume, so start there and play around with it. I've personally never used the stuff, I've always used ported boxes and polyfill is used less commonly in those.

Does that Mustang have the same trunk as the LX coupes from that generation? I knew a guy with one and it's a real bad trunk to try and fit subs in; IMO fiberglass would be the way to go if you're comfortable with it.

Last edited by Kyle Harty; Jun 18, 2002 at 07:59 PM.

Jun 18, 2002 | 08:32 PM

#23

DJ SprinklesNJO

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From: New York

i beleve the trunk is not the same as the lx model. besides its a convertible. there is no room for anything. but im gonna try. lol thanks for all the help guys.