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Old Sep 7, 2008 | 11:22 PM
  #1  
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Default Death to the sound...

I've read as much as I can about alot of sound deadener...

The time is near! I've wanted to pull the carpet and door panels, remove my amp, and sub box.. all to upgrade the quality of my ride. (I'm not alone nor the first)

Here's my situation. I'm in college, thus I have a budget. I plan on buying a capacitor to help out with my system, and put new more adequate wires for the amp (last owner put puny wires on a 750w amp)

First questions:
What is the best/least expensive material?

How many sq. ft. do I need for a '88 convert? (storage compartment, doors, cockpit)

Any advice for doing a convertible is appreciative

The following are the mat's I've been thinking about... your opinions?
Edead V1
B-Quiet Ultimate
Fatmat
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Old Sep 7, 2008 | 11:34 PM
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Default Opinions?

Upgrade to 4ga. wire & you won't need a cap. Take the cap money, along with deadener budget and buy Second Skin. (Damplifier or Damplifier Pro) Do your deadening in chunks as money allows (doors first)
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Old Sep 7, 2008 | 11:49 PM
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Default

Originally Posted by Vetster88
Edead V1
B-Quiet Ultimate
Fatmat
No
Maybe
No

MHO, the only acceptable budget damping material is Raamat. SecondSkin is the best on the market.

Keep in mind, you dont have to cover every square inch of the car. This is just DAMPING material, it reduces panel resonance. If you want to use it as a sound barrier, you're going to spend a lot of money and be disappointed.

You just need to hit the middle of large flat panels.

What you want is a mass layer with foam under it. SecondSkin luxury liner is the ticket. You dont need to glue it in. About $200~ will do the entire car. You need something at least this massive to cut down anything in the meat of the road noise range.
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Old Sep 7, 2008 | 11:49 PM
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Originally Posted by SublimeZ
Upgrade to 4ga. wire & you won't need a cap. Take the cap money, along with deadener budget and buy Second Skin. (Damplifier or Damplifier Pro) Do your deadening in chunks as money allows (doors first)
I already have the wire off my old system which is 4ga.

Currently, the lights dim with the volume around 15-20, and it's no where near "full capacity"... while driving it ends up at the 25-27 vol. level. I don't want to strain the alternator too much.

I was thinking about the Damplifier but the price made me cringe a little. I'll debate about bumping it to the top. I did like the temp range for it, but the adhesion factor according to sound-deadener-showdown didnt do so well..?
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Old Sep 7, 2008 | 11:51 PM
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Originally Posted by Vetster88
Edead V1
B-Quiet Ultimate
Fatmat
No
Maybe
No

MHO, the only acceptable budget damping material is Raamat. SecondSkin is the best on the market.

Keep in mind, you dont have to cover every square inch of the car. This is just DAMPING material, it reduces panel resonance. If you want to use it as a sound barrier, you're going to spend a lot of money and be disappointed.

You just need to hit the middle of large flat panels.

What you want is a mass layer with foam under it. SecondSkin luxury liner is the ticket. You dont need to glue it in. You need something at least this massive to cut down anything in the meat of the road noise range.

A lot of people like to flaunt 1/4" thick foam products as noise barriers. They are not. They will absorb some high frequency sound.

MHO, to be as blunt as possible - using anything other than luxury liner, similar, or LEAD, you are throwing your money away.
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Old Sep 7, 2008 | 11:59 PM
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Originally Posted by Kale
Keep in mind, you dont have to cover every square inch of the car.
You just need to hit the middle of large flat panels.

So all I basically need to cover is the middle of pas. and driver floors, the inner? doors... then do the majority of the storage compartment?
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Old Sep 8, 2008 | 12:40 AM
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Originally Posted by Vetster88
So all I basically need to cover is the middle of pas. and driver floors, the inner? doors... then do the majority of the storage compartment?
Sure, if they are causing you a problem by resonating. This will have a minimal (if any) reduction of road noise.
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Old Sep 8, 2008 | 12:49 AM
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Originally Posted by Kale
Sure, if they are causing you a problem by resonating. This will have a minimal (if any) reduction of road noise.
yesh, Now I'm confused... what do I need to do to help reduce exterior noises and help with the audible level inside
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Old Sep 8, 2008 | 12:50 AM
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Originally Posted by Vetster88
yesh, Now I'm confused... what do I need to do to help reduce exterior noises and help with the audible level inside
See above:

What you want is a mass layer with foam under it. SecondSkin luxury liner is the ticket. You dont need to glue it in. About $200~ will do the entire car. You need something at least this massive to cut down anything in the meat of the road noise range.

Also keep in mind, tires have the biggest impact on road noise.
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Old Sep 8, 2008 | 01:00 AM
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Alright I miss read the post about doing the middle of the floors... So what I'm looking for is not deadener but a mass layer?

sorta like the factory shreds with rubber topping almost? (just to be sure I order the right stuff)

btw, I'm running light truck tires....is that going to be to much noise?....... J/K!

I'm REALLY running 275/front 315/rear sumitomo's
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Old Sep 8, 2008 | 09:51 AM
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Well, I'd stick with something purpose built like Luxury Liner.

If you want, you can use 1/2" foam with lead on top, but that's going to be super expensive.
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Old Sep 8, 2008 | 04:32 PM
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I'm going to try and look for luxury liner locally first, thus I wanted to be sure I'm not hustled into something different.

How do I apply it?

And how do I calculate how much I'll need?
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Old Sep 8, 2008 | 05:28 PM
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1) Lay it down, tape the edges with foil tape.
2) Measuring tape and a calculator.
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Old Sep 8, 2008 | 08:53 PM
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Kale has it just about covered.

Second skin damplifier pro is great stuff and cheaper than dynamat!.

While Lux liner is by far the best i've year heard of, SS also offers closed cell acoustic foam called "overkill" and "overkill pro. For a budget, it's an excellent alternative to Lux liner running about 1/2 the price. I used overkill pro on the doors, cargo area seat's rear wall with great success.

if you have (or plan to get) aftermarket exhaust, acoustic foam behind the seats and in the cargo are will significantly reduce interior noise.

Oh, and forget the cap. btu you really should consider the big 3. All the C4 cars i've looked at have really wimpy charging wires.
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Old Sep 8, 2008 | 09:22 PM
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Keep in mind, its half the price but not half the performance. Price for price, luxury liner gives you more.

Without the mass layer, its just an absorber. Go look up how much and at what frequencies 1/2" absorbs.
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Old Sep 9, 2008 | 01:42 PM
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How does the crazy cowboy kit compare to lux and overkill as a mass layer?
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Old Sep 9, 2008 | 02:12 PM
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Originally Posted by calvie018
How does the crazy cowboy kit compare to lux and overkill as a mass layer?
I've never had the material in hand... But by appearance, I'd say Luxury Liner would be far better for sound deadening, and Cowboykit would be far better for thermal insulation.
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Old Sep 9, 2008 | 03:29 PM
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Originally Posted by Kale
Keep in mind, its half the price but not half the performance. Price for price, luxury liner gives you more.

Without the mass layer, its just an absorber. Go look up how much and at what frequencies 1/2" absorbs.
I'm looking at the SS site and it says that regular lux liner is the same price as overkill pro. Which one would be better to use?

The site says:
What is the difference between Luxury Liner and Overkill Pro?
Luxury Liner is a noise barrier
Overkill Pro is a noise absorbing filter.
Both products get applied on top of vibration dampers like Damplifier Pro or Spectrum in order to reduce airborne sound waves, but they do it in two totally different ways.

Overkill filters out specific frequencies that are able to penetrate the first vibration damping layer, but because it is so light, it allows many other sound wave frequencies to pass right through.

Luxury Liner is a barrier that blocks and reflects the most difficult airborne sound waves that Overkill Pro is not capable of handling.
If I were to go with lux liner (non pro) wouldn't that just block everything that the overkill pro would absorb?
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Old Sep 9, 2008 | 03:55 PM
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Yes, luxury liner will block what Overkill blocks, and more. Overkill is aimed at high frequencies.

Overkill may be a preference for some people due to weight concerns.

Luxuryliner is about 1lb/1ft^2
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