Sound deadening in a sub box?

Travis Bronze Member Username: Tj80 Vancouver, BC Canada Post Number: 70 Registered: Aug-05	Posted on Tuesday, October 11, 2005 - 20:46 GMT Is there any reason to line the walls of an enclosure with dynamat? I've heard some people say it helps eliminate "standing" waves... Anyone have any opinion on this topic? What about polyfil? I don't need more volume than I have now... I'm at the recommended box size.. so does Polyfil have other benefits besides fooling the sub into thinking the box is bigger?
Travis Bronze Member Username: Tj80 Vancouver, BC Canada Post Number: 71 Registered: Aug-05	Posted on Wednesday, October 12, 2005 - 19:09 GMT bump... anyone?
Isaac Gold Member Username: Carguy Post Number: 4721 Registered: Nov-04	Posted on Wednesday, October 12, 2005 - 19:14 GMT Don't waste dynamat in your sub box. It was meant for car's chassis. You can instead use sprays for sound deadening. It doesn't make any sense for vented/ported boxes. In a sealed box, it is useful for getting rid of the "boxy" sound. You can also use pollyfill for the same purpose.
mikechec9 Gold Member Username: Mikechec9 Http://www.cardomain.c... Post Number: 1235 Registered: May-05	Posted on Wednesday, October 12, 2005 - 22:43 GMT tests have been done. results were inaudible. don't build your enclosure as a perfect square/box and you won't have to concern yourself with standing waves.
Isaac Gold Member Username: Carguy Post Number: 4728 Registered: Nov-04	Posted on Wednesday, October 12, 2005 - 23:17 GMT You can slant the back 15 degrees.
Robert Silver Member Username: Robert_d MIA, FL USA Post Number: 217 Registered: Sep-05	Posted on Wednesday, October 12, 2005 - 23:25 GMT anyone know the specs on an 18" SX ported box ? im aiming to fiberglass it in a RSX trunk ... it has a pretty big hatchback i think it would fit
mikechec9 Gold Member Username: Mikechec9 Http://www.cardomain.c... Post Number: 1238 Registered: May-05	Posted on Wednesday, October 12, 2005 - 23:31 GMT try www.soundillusions.net.
Travis Bronze Member Username: Tj80 Vancouver, BC Canada Post Number: 72 Registered: Aug-05	Posted on Thursday, October 13, 2005 - 02:50 GMT Thread jacker! Anyways, thanks for the answers all... unfortunately it's too late to slant the back of this box, though I have plenty of MDF left over.. so maybe the next one. But I didn't build a cube, so hopefully it'll be fine.
hondarider Bronze Member Username: Hondarider Glidden, Iowa U.S. Post Number: 96 Registered: Sep-05	Posted on Thursday, October 13, 2005 - 03:56 GMT so a perfect square box will not be as good as one thats slanted. Does this apply to ported boxes too? And by perfect square do you mean the same hieght width and depth?

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