Sub enclosure problem!! NEED HELP!

[bboy eclipse]

Hi guys

I was just wondering if anyone has advice on fixing a sub enclosure problem. ATM my sub eclosure has an area in front of it where plexiglass should go. (PIc below). Once I put the plexi glass on, the bass of the subs seems to much for it and the plexiglass rattles like hell and its bloody annoying!!! I was just wondering if anyone has any ideas to fix this problem? I have been told that drilling holes into the plexiglass will fix the problem, but i want to know if the have to be a certain size? or amount. I thouhgt i'll seek advice before drilling random holes in it and ruining my plexiglass!!!. If anyone has this knowledge please post it here.

Thanks!

Here the pic of my sub box
http://image-cache.ozhonda.com/forum/attachment.php?attachmentid=2641&d=1158045718

[Fr3aKi3]

Don't see any pics...

[bevis90]

just cove rthe whole thing no need to look at the sub woofer

[Bayani]

Screw it down harder, or the area must be too big to support the movement.

Your best bet is to use thicker plexiglass.

[muhhan]

Yes, as others have said thicker plexiglass or perhaps trying a material like macralon, which is like a perspex material but much easier to work with. It kind of works like wood.

I'm not sure with plexiglass, but with perspex you have to be carefull when working with it as it can crack very easily when being drilled through. From my experience using a drill bit designed for brick gives better results (sorry the proper term for this sort of bit has just slipped my mind).

You could also try putting some bracing across the front panel, but this may not be the look you're after. You could try incorporating the bracing into the design by putting thick aluminium bars across the front and lining the inside of the enclosure with diamond checker plate would give a cool industrial look to your enclosure and provide extra support to the front plexiglass front panel!

[tRipitaka]

*moved to audio/video section

[vividjazz]

Dynamat

[aka_NSX]

18mm perspex i bet it wont rattle

[bboy eclipse]

Thanks guys for your suggestions. I was thinking about screwing it in tighter but i fear i may crack the plexi glass which is the last thing i want to do. Putting brace sounds like a good idea and so does thicker plexi glass. Anyways thanks for the help again and if none works, i'll just yank it off! lol

[SIR GSR]

Have you got anything else securing the plexiglass? Or just the screws? It all depends on how big your window is. If your pictures worked it might give more of an idea...Or even just post up the measurements and I'll think of some way to help...

[hurstyboy]

As stated b4 dude the pics would be a big help for everyone....but just hazarding a guess...(pls b4 flaming me ive had after work drinks tonight ppls).....and as an easier solution have u jsut trie additional screws.....if the distance between ur fixing points is to large then the material between these points will rattle.....if you dont want to screw ne extras then maybe use dynamat or another sound deadening product and cover just the part of plexi-glass that is touching the rest of the box to kill the rattle......still dude remember these are jsut guesses cause without at least pics none of us can really give proper advice to help with the problem

[bboy eclipse]

Hey. Sorry guys i thought the pic was working, i will try and fix that problem. As for the plexiglass it is 40cm width and 29 cm height. It is also about half a cm thick which im thinking that may be the problem that it is too thin. currently i have used 18 screws to bolt it down. I;ve tried and attach the pic again

http://image-cache.ozhonda.com/forum/attachment.php?attachmentid=2641&d=1158045718

[mugeneration]

From my experience using a drill bit designed for brick gives better results (sorry the proper term for this sort of bit has just slipped my mind).

Called a masonry bit ;)

Yeah use thicker material, screw down tighter, and try to add some padding of some kind between the plexi and the box. Clear silicon perhaps?

[Bayani]

Dynamat on Plexiglass? LOL...

Thicker Plexis is the way to go.

Simply put, the only reason it's rattling is because the increases in pressure.

Putting more screws around the edges won't change this, as the volume of the box increases, your plexi -- being the weekest side in the box -- is going to move.

[panda[cRx]]

18mm perspex i bet it wont rattle

:thumbsup:

[bboy eclipse]

Yeah i realise that the pressure in the box is too much for the 5mm plexi glass lol. Well it cost 5 dollars so I wasn't really complaining lol. Well i'll probably search for some thicker plexi. Any size anyone recommended? Or does everyone think that 18mm is thick enough?

[muhhan]

Cheers for that mugeneration. I was so caned after work yesterday, my brain was well gone by 5pm!

bboy eclipse, 18mm is pretty dang thick so it should be OK. 18mm is the thickness of MDF I used for my sub enclosure. Btw, that's a nice looking 'box' you got there!:p

[bboy eclipse]

Cheers for that mugeneration. I was so caned after work yesterday, my brain was well gone by 5pm!

bboy eclipse, 18mm is pretty dang thick so it should be OK. 18mm is the thickness of MDF I used for my sub enclosure. Btw, that's a nice looking 'box' you got there!:p


O ok well i'll probably go with 18mm when i can be stuffed driving out to get some. It's hiding in da boot so da plexi can wait. Lol i bought the box for 50 bucks at a second hand store lol. It's a custom made box. Painted it as well as it was looking pretty shocking before. Well thanks again for the advice.

[Slow96GSR]

It looks carpeted so I doubt it's rattling on the box. It's most likely the plexi just vibrating and making noise. I would go to a thicker size and then put a screw in every 2 inches. You just need a really sharp bit, one for metal works the best as it is pointed at the end, and a masonry bit is made for cement and bricks. Just don’t put pressure on the bit when drilling as you will punch thru and crack the plexi. Let the weight of the drill do the work. I use a smaller bit than needed for a pilot hole, then a counter sink bit until you reach the right size hole you are making, this won’t go all the way thru and takes at most 2 seconds of drilling. Then you go to the other side and drill thru with the right size to fit the screws. This way there is no chance of busting thru and cracking the plexi.