Sound deadener

[Greg]

I am about to install splits in my front doors. At the moment with the stock speakers they rattle when the volume is turned up, so with the splits they will only rattle even more.

What type of sound deadener should I use? I was looking at some stuff at Jaycar the other day which looked like carpet underlay with a vinyl backing on it, is this the best type to use or would a spray be better?

Also, what should I line the inside of my sub box with (its only a 10")?

thanks

[predator]

I am about to install splits in my front doors. At the moment with the stock speakers they rattle when the volume is turned up, so with the splits they will only rattle even more.

As far as i can tell, that is just the buzz due to the crapness of the default speakers rather than any mounting problem.. I have same problem. They could even not be screwed in correctly.

No doubt any premium audio sound deadener will set you back, when maybe even pourous foam rubber could do the trick for half the price. That is really what it is anyway.

[Guest mooks66]

dynamat extreme.

do it once.

do it right.

its well worth it too i might add.

[YO880]

There is also some stuff called G-Spot Sound max dead or something.. i just ordered a shitload for my car, hopefully it will arrive tomorrow, fingers crossed..

i got it from

http://www.webaudiodirect.com

much cheaper than dynamat etc.. though i am yet to experience the stuff.. i have used stinger roadkill before, but wasn't completely impressed.. brownbread (you can get that from jaycar or the above website) is something that i also used and was impressed with (it is fairly cheap too!)

[ultim8DTM5]

G-Spot paint is good for those hard to reach places, although it is best applied 3-5mm+ thick. For door skins, boot etc with mostly flat surfaces go with Dynamat extreme, one layer of that stuff will satisfy the majority of people.

[MRK25T]

Are you going to take pics YO880 when you do it?

Feel free to come down to my place if your seeing christian again so I can have a look at your car.

Mark

[YO880]

yep sure will, the stuff still hasn't arrived so i don't know when i will get time to do it, but i will post pics when i have...

MArk, you should come on one of christians friday night midnight runs only i won't be there tonight

[sniffy]

Originally posted by Greg

Also, what should I line the inside of my sub box with (its only a 10")?

i wouldnt worry with that...just make sure its sealed air tight (i mean real tight) for best results...that is if your box is going to be sealed!

[MRK25T]

I don't do friday nights, I'm up at 4am each Saturday working.

Sunday is the only time I can go on cruises and at the moment my car is out of action due to an exhaust leak.

It's been a while since I did physics at uni, can waves travel through an air-tight sub box?

How do you test if the box is really air tight? Stick a canary in it and see and if it has fallen off its perch after X minutes? Maybe stick the whole sub abd box under water and see if you can see any bubbles?

Mark

[Sumo]

I dont think you need to test your box to those extremes But what I did was run a big bead of roof and gutter silastic around the inside where the joins are, and it sealed the box up really well... The motto is do your best silastic the rest :lol:

Cheers

Sumo

[sniffy]

Originally posted by MRK25T

How do you test if the box is really air tight? Stick a canary in it and see and if it has fallen off its perch after X minutes? Maybe stick the whole sub abd box under water and see if you can see any bubbles?  

Mark

lol

like sumo said...silastic does the trick.

when you screw the sub into the box, try not to undo the screws again, it loosens their "seal". the way i test is when the sub is in, i push gently on the sub's cone (not the dust cap:eek: ) evenly, if its sealed, it wont move much. if it has a leak, it will slowly go in. its kinda hard to explain, but dats what i do!

[YO880]

or when it's running, just feel around all the joins, you will feel or even here the air escaping..

[Greg]

ok i have a tip for sound deadening: cushion stuffing

you can buy it from lincraft and those kind of shops really cheaply and it works quite well

[Greg]

I'm going to stuff my doors with this cushion stuffing tomorrow (already done boot), but i'm not sure which part of the door to put it in... do i put it:

behind the plastic lining where the window winds down to?

-or-

in between the plastic lining and the interior panel?

thanks

[FRISKI]

Just becare full, if i remember the cusion stuff may hold water and them goes off giving a watery smell. But when applying sound deadening in the doors it's best to do both inner and outer of the door.

[funkymonkey]

lol this might sound stupid, but PinkBATTs and all that other home insulation stuff is EXACTLY the same as hardcore sound deadener (in fact most times manufactured at the same plant) lol

[PuppaDuck]

I have some sound deadening stuff. Not sure what brand it is. Looks charcoal grey/black and about 3-5 mm thick.

Sticky tar looking on one side. I think it got heated up and applied whilst hot.

Not sure how good it is, cause my rear spoiler still vibrates. That might be because the spoiler pads hadn't been reinstalled after repainting. (looking for some replacements if anyone has any - I've got the higher squarish stock spoiler - M-Spec ?)

A definite problem is when I see it peeling off inside the rear quarters. I reckon its probably from the sun. I just push it back on and it stays for a while, till I check it again in a few months.

[Ouch]

To be honest, the foam thing is really a waste of time. I did that to my boot and hardly noticed any difference - i guess you could if you really listen out for it. The panels stopped rattling as much, but still rattled. The foam i used was acoustic foam, as in the stuff you find in recording studios cos picked it up real cheap.

Dynamat extreme is worth its weight in gold. Haven't used any other brands so can't really compare. Anyhowz, did that to the doors and the improvement was phenomenal. Gotta try it to really know though. And the doors now make that mercedes sound when they close which is pretty kewl. I wouldn't put any foam in the doors if you plan on keeping ur car for a while - yes they will hold water, yes they will then weigh ur car down, yes bacteria will grow in there after a while, and yes it will stink! Plus foam will absorb sound, but doesn't particularly change the resonant frequency of panels (which is the advantage to the stuff you stick on), so wont do much to stop rattling (although it will help).

[DTCHMN]

YO880 - have you installed the serenity max in your car yet ?? if you have, where'd you put it - front & rear ?? how many sheets did you use ??

sorry for all the questions, i'm thinking bout getting some, so i just wanna know exactly how much.. thanks heaps..

[YO880]

yep, i used the serenity max to cover to boot and under the rear seats.. used dynamat for the doors

i think from memory i got 2 or 3 of their large packs, and 2 large packs of dynamat (to cover int. and ext. door skins)..

it is a good idea to heat the stuff while applying, i didn't and in some places it is peeling off already

you are better off getting the densest (is that even spelt right?) material you can get, and use as much as you can afford too the more covered the better!