Sound Deadening Project (picture heavy)

Skidmarcx

New member
So, I was ready to take my daily driver to the next level in comfort and sound quality and decided that making it more quiet on the inside had to be done... it was a long and frustrating process, but the outcome is something words can't describe. I chose to use Second Skin since I've read nothing but good things about it... and after using the product I'd say it's well worth the money.

Materials used
- 45^2 ft Dampifier Pro B-Stock (Constraint Layer Damper)
- 90^2 ft Overkill (1/8" Closed Cell Foam)
- 45^2 ft Luxury Liner (Mass Loaded Vinyl)
- 20^2 ft 3M Thinsulate (Acoustic Barrier)
- 1 roll Foil Insulation Tape
- Speaker Tweeker Kit
- 2 cans High Temp Adhesive
- 2 cans 3M Vinyl Adhesive
- misc stuff (wooden roller, knife, scissors)

Total Labor ~ 20 hours

Since there are other threads on the subject I skipped the tear down process to keep pictures to minimum. I started with the doors first since they were the easiest to tear down... I only show one door since the process is the same for each... and due to the limit on pictures I showed the important ones

The door skins themselves weren't terribly difficult to take care of, but what didn't work in my favor was the Limited flares and side moldings... removing them would be a nightmare and I wasn't about to go down that road. I simply needed to keep the metal from resonating and then add a sound barrier, so I didn't hear the plastic moldings rattle on the inside of the vehicle... doesn't really matter to me what the outside sounds like. Here is the CLD added... and contrary to what most people believe you don't need 100% coverage as CLD is not a sound barrier it's designed to stop vibration with as little as 25% coverage. You can basically knock on the panels with your knuckles and when you hear a dead thud you know you're good to go



A picture of the speaker tweeker designed to break up the rear sound waves



Next step is the CCF and MLV layer and this is where more IS better... 100% coverage is ideal since this is a sound barrier. This can be a tricky step because you want to make sure the door is still serviceable (window, regulator, motor, speaker). Initially I tried to squeeze in a entire layer of MLV, but there is so little room between the door panel and inner skin that it simply wasn't going to happen. I then decided that at minimum I needed to cover the voids and do a piece over the window motor to reduce noise. The MLV needs to be decoupled in order for maximum effectiveness, so I used a layer of CCF on both sides and then sealed the pieces with Foil Tape.



Afterwards it was easy to trim a piece of CCF to cover the entire door panel and I used spray adhesive to attach it at the top, so I could easily flip the piece up for service



Next area I attacked was the rear of the vehicle... the beauty of doing the horizontal surfaces is that you don't need to use adhesive you just let the carpet keep it in place







Rear quarter panel area... I would've loved to cover that void in the rear, but there is a cabin vent that went inside





I only did an MLV barrier over the wheel wells since again space was an issue



Here is the tailgate... I didn't snap pictures of the outer door skin since there wasn't much to see with the window regulator and motor in the way. I didn't do an MLV layer since there isn't much noise that comes through at this point and also to keep weight down... I don't need to stress these 16 year shocks anymore than I need to ;)





Here is the floor area... this is where I used the bulk of the MLV and tape to seal from heat... I had to keep the rear heater into consideration, so the passenger side took a bit longer to do. Ideally you want to remove the factory CLD, but this stuff was literally stuck on there and I didn't want to use my air hammer because that would've gotten ugly LOL













The last area was the roof... this is an area that could easily be overdone. There really isn't a need for a noise barrier since there is nothing to block. This is where I used a CLD treatment and the 3M Thinsulate to cut down on the heat and also wind noise from the roof rack. I didn't get pictures under construction because I was frustrated during this step and completely forget, so here is a couple shots where you can see the 3M material in between the headliner. I trimmed a huge piece for 100% coverage





Hope this helps anyone wanting to do this project
 
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Holy crap! You went all out with that project.

I guess my only question to you would be, how well does it muffle sound compared to factory?

It all looks good and you didn't skip any steps. I'm sure that thing is quiet as ever now. I have been thinking about doing this, and not because of my loud subwoofers or speakers. I wanna do this because my tires rattle my entire truck and I think after I'd do this job, my life would be so much better.

Do you even get that much road noise anymore?
 
Excellent write-up, thank you. I need to do this. One thing I'm worried about is interior panels going back together. Did you have issues with things fitting correctly after adding 1/4" or more of material under them? I realize you keep the holes for panel fasteners open, but I've had issues with this before, where panels don't fit right after being "bumped out" by the damping materials.

Again - thanks for putting this up! So, it's super quiet, huh?
 
Great job. I'm really interested in doing the same. What is the difference? Do you feel like it was worth it? I was wondering if you have an iPhone or android phone if you could download a sound meter and tell us the decibel level at 70 mph. I'm sure it is a huge difference.
 
Thanks for the compliments... I wish I had access to an RTA for comparison... As far as the interior going back together I didn't use MLV in places that were tight and the CCF is super easy to penetrate, so overall everything went back together rather easily. As far as the difference it all made... Well I won't say it's as quiet as a Lexus, but if it weren't for my 35s it would be comparable... It's quiet enough that I hear specific noises now that I can easily pinpoint like the door lock rattling and such... Once I get every detail covered ill be a happy clam... And combined with my window tint my A/C is so much more efficient
 
Looks very nice. I put some dynamat over my driveline tunnel when I replaced my tranny, but it is just not enough to be effective. I need to do something like this. Do you mind me asking what the materials cost for your project?
 
I spent just over $900 shipping included... I have about 15-20 ft^2 of Damplifier Pro, about 20 ft^2 of Overkill, and about 40 ft^2 of Luxury Liner remaining ... I purchased more because I'm going to do my fathers car and its cheaper in bulk... So figure $500-600 to do a vehicle properly with Second Skin... Cheaper if you use other materials
 
I spent just over $900 shipping included... I have about 15-20 ft^2 of Damplifier Pro, about 20 ft^2 of Overkill, and about 40 ft^2 of Luxury Liner remaining ... I purchased more because I'm going to do my fathers car and its cheaper in bulk... So figure $500-600 to do a vehicle properly with Second Skin... Cheaper if you use other materials

Wow, thats a lot of money. Well, you will never have to do it again. Im thinking about getting enough sound dampening material for my rear end. I will probably do the doors after. But $900 is a good amount. Looks certainly well done. Thanks for the photos.
 
You most likely didn't read the part where I stated I ordered enough for two vehicles give or take a few materials since bulk is cheaper... And you can certainly use other materials I almost considered buying MLV from a different source for half the price, but apparently you run the risk of having an undesirable odor... So I opted for the SS... Different CLD such as Dynamat Extreme and Raamat can be purchased for decent prices too... Just an FYI there are cheaper alternatives if you do your research
 
Awesome job dude.

I did this a few years ago as well. I pulled the panels, seats and roof.

But your install is far more professionAl.

Is this a hobby / what do you do for living?
 
You most likely didn't read the part where I stated I ordered enough for two vehicles give or take a few materials since bulk is cheaper... And you can certainly use other materials I almost considered buying MLV from a different source for half the price, but apparently you run the risk of having an undesirable odor... So I opted for the SS... Different CLD such as Dynamat Extreme and Raamat can be purchased for decent prices too... Just an FYI there are cheaper alternatives if you do your research

Yeah, I read your post about ordering enough for two vehicles, but $900 is still a lot of money to me. I would consider Dynomat, because its readily available in my area. But ive heard people using old socks and shirts for sound deadening material, and glue it to their walls. I know all the various ways, I just thought I would tell you, you did a good job, and that it wasnt a cheap one, thats all.
 
Well thanks... I should've been more specific in that the parts alone were roughy $700 it's the shipping that killed me... The total shipping weight was 187 lbs... I'm sure 120 of it was the MLV because I damn near dropped a nut moving the roll... And I managed to get b stock Damplifier Pro which is the throw away material I guess ... For half price, so the Dynamat Extreme would've been more expensive... When you factor in everything I used including tape, roller, knife, adhesive... The price isn't terrible...

Awesome job dude.

I did this a few years ago as well. I pulled the panels, seats and roof.

But your install is far more professionAl.

Is this a hobby / what do you do for living?

Thanks man... It's a hobby I've been doing a lot of research and talking to the right people I suppose... To finally pull the trigger
 
Wow that's a lot of money. When are you going to post the sound system build?

No one spends that much and has stock speakers...

I did mine completely using roofing material rubber matting.

It actually worked pretty well and has been in place for over 6 years now with no issues. There was a rubber smell but it only lasted about two weeks. Total cost $150 picked up locally.
 
Right on guys yea SDS is one of the best sources of info I initially contacted Don, but he is hard to reach and I considered the shipping costs from his location and Second Skin made more sense since I'm located in Phoenix

My sound system consists of...

- Alpine CD/Bluetooth deck it's nothin fancy has 2V preouts

- Audison BIT10D sound processor

- active front stage with JL Audio C5-650 components powered by a JL Audio HD600/4

- two JL Audio 13W6s in custom ported enclosures... Each powered by a JL Audio HD750/1

- 180 amp alternator from DC Power

The box was designed for my Cadillac CTSV, but just so happened to fit like a glove in the back area... Ill probably change it up later on, but I've had this stuff for a while... Here is the enclosure

FB900526-8AE5-4BBE-A7DB-FC2A449FA04E-6597-000001F01EA0CB0A_zpsc3c23e20.jpg~original
 
man I want a bit10 badddd, any other noticeable rattles coming from the rear hatch? i have yet to pull mine apart but after seeing some of masterwill's videos on youtube im on the fence on going with anything serious for a sub stage, ive been working on idea's of a stealth box with a sundown sd-8 sealed up instead. Also where did you stuff the 600/4?
 
The BIT10 is the single best investment I've made in my sound... It's soooo badass, but it sounds like you know already... I want a less bass intensive setup, so ill eventually sell everything except the DSP and HU... I've got my eyes on the 5 channel Audison and some either Hertz or Arc components and a single 12 stuffed somewhere... Maybe ill keep one 13 they stay well behaved with the power I've got... The rear hatch does rattle a bit still, but what wouldn't with this much bass... Which I keep down most of the time... I have all three amps mounted to the back of the enclosures... I've heard the name Sundown, but I don't know much about them
 
Install looks great!! I cant imagine the amount of low end you have with TWO ported 13W6s with 750 to each. I had one 12W6 with 500 to it in a seal enclosure in my BMW before I sold it and I hardly ever had it at max power...

Install looks amazing, but doubt I'll ever get antsy enough to make that much of an investment on my 4runner for sound deadening.
 
Install looks great!! I cant imagine the amount of low end you have with TWO ported 13W6s with 750 to each. I had one 12W6 with 500 to it in a seal enclosure in my BMW before I sold it and I hardly ever had it at max power...

Install looks amazing, but doubt I'll ever get antsy enough to make that much of an investment on my 4runner for sound deadening.

Thanks man... yea it is quite an investment that's for sure lol
 

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