I was searching and couldn't find anything in particular about this topic. I have heard that people spray undercoating inside the box and it helps with bass dampining I have also heard people dynamat the inside of the box as well.
Does this really help your sound?
If so what exactly does it help?
thanks in advance
it does the same thing that adding poly fill to a sealed box. slows down the sound waves in the box. But in my opinion you wont notice much what are you trying to go for with your system. If you want to hit lower notes just go ported.
Well I'm making a custom fiberglass box right now. My current box is ported (I have a 12" Vega) and I just want this new box to be as nice as possible because the setup I have now pounds pretty nice but I am not going to port this new box. I just want loud clean bass,.
i made my box out of pressure treated plywood.
on the inside i sprayed VHT undercoating, big difference.
also, i used that foam-in-a-can stuff to seal in the flavor.
on the outside i gave it a layer of the VHT undercoating something or other (dunno the name but it came in a can like spraypaint.)
then gray primer on top and black on top of that.
Now when you say big difference you mean what exactly? clear, louder.. .
you made your box out of PLYWOOD???
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I have heard of spraying the liquid Dynamat, or some other similar product, inside the box to increase output. I have no proof that it does indeed work though. One of my friends did it.
I have also heard of sandwiching Dynamat between two layers of ¾" MDF for the sub mounting side of the box, to increase SPL. Another idea was to use bolts and T-nuts to mount the sub with, to increase SPL. I have no proof that either of those do indeed work though. I think I read those in an older Car Stereo Review magazine.
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lundis wrote:you made your box out of PLYWOOD???
pressure treated plywood, it was sitting in the garage collecting dust and i didnt feel like going to home depot
Always dampin an enclosure! If you dont have alot of $$$ to spend, R-12 insulation works great. Dont pack it in. Just cut it to size and lay it on the bottom and back wall of the enclosure
you snooze you lose!
keep working, millions on welfare depend on you!
You can also checkout this site www.diyaudio.com and they will tell you the same thing.
you snooze you lose!
keep working, millions on welfare depend on you!
thoughthardtocomeupwiththis wrote:I have heard of spraying the liquid Dynamat, or some other similar product, inside the box to increase output. I have no proof that it does indeed work though. One of my friends did it.
I have also heard of sandwiching Dynamat between two layers of ¾" MDF for the sub mounting side of the box, to increase SPL. Another idea was to use bolts and T-nuts to mount the sub with, to increase SPL. I have no proof that either of those do indeed work though. I think I read those in an older Car Stereo Review magazine.
Using T nuts and bolts won't help your SPL unless your sub wasn't secured correctly in the first place. Adding all those layers of mat or whatever inside your box doesn't make so much of a difference that you'd be able to hear it, maybe your box stops rattling, but then again your box shouldn't rattle at all lol
If you want low end build the biggest box allowed by specs and give it some clean power. If you wanna be just plain loud go ported.
damping spray in the box will help to get rid of standing waves wich can cause cancellation. in reality two identical boxes one with spray and one without the diffrence if audible to the ear at all would be very small. and any spl diffrence would be small as well. for the everyday person it would problaby never be moticed, but to a spl guy a 1/10th of a diffrence in spl could mean a loss versus a win.
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so for normal applications its not nessecary
