Help me sound dampen the coupe!!!!!

[ladysmanfelpz 10+ year member]

I own a 2007 accord v6 coupe. Planning the whole build, but first I want to sound dampen. I think breaking into the panels and dissembling the interior will give me a good look at the car and help me map out the whole install I am planning. I don't have too much experience in sound dampening however, as I only did a spot job of CLD tiles of Hushmat on my old car. Even this made a tremendous difference and I understand that the first step to a quality audio system is eliminating the noise, and this is what I am looking to do before amplifying my system.

So here is what I am thinking. I think for the first run at it I have a budget of $500, closer to $400 would be nice. I plan to purchase from my local shop as they are fairly priced and well knowledgeable guys who have helped me out with a multitude of problems. I don't plan on a full disassembly the first time around as I am planning to do as much as I can over Thanksgiving break (I'm a student). So I'm thinking I will try to get an extensive job on the doors, and get a lil to the trunk and possibly the roof of the vehicle, but don't think I'll have time to get the carpet off and get to the floorboard. With that in mind these are the purchases I'm thinking:

200 sq. ft. of Hushmat for $200

Stinger Roadkill foam dampening mat (2) for $260 Stinger Electronics | Product Details

Backwave breakers for front woofers $40

So I guess my first run at it will cost me around $500. Now my question for you experts is is this a good way of doing it? I don't need full limo sound, but a quiet coupe would be very nice, and my understanding is you need CLD tiles to eliminate rattles, a decoupling agent (even air can do) and then MLV to block the sound from entering the cabin. This is why I plan to do 2 layers of hushmat to the doors and put the backwave diffusor behind the speakers and then wrap the door panels in the roadkill foam. It is my understanding that the roadkill foam is a MLV with an adhesive back, but if you experts can check the link and tell me if this is what I am looking for that would be great.

That pretty much covers my first job at it, so any advice is appreciated. I think it will make for a good teardown and give me a much quieter ride as well as way better midbass response. Any other tips such as using polyfill or other products to fill the door and eliminate backwaves will help, but I thought going with trusted products would be best since I know some products not intended for auto applications can hold water and mold, and block the way of the window and other functions.

Thanks again for the advice and will let you guys know what I decide to do.

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[ladysmanfelpz 10+ year member]

Nothing yet?!! I plan to pick up soon so I just want to know if this is a good way of going about things or if I'm wasting my money!

 

[Jeffdachef 5,000+ posts]

where the hell do you get 200 square feet of hushmat deadener for 200 dollars?

 

[chefzane]

where the hell do you get 200 square feet of hushmat deadener for 200 dollars?

No **** I wanna know too

 

[ladysmanfelpz 10+ year member]

I'm pretty sure its that much. And thats what I'm saying. My shop hooks it up. I believe I got 40 sq ft for $80 and they'll do a bulk buy of 200 sq ft for $200 if I remember correctly. The hushmat stuff is cheap and is black so not that shiny cheap looking stuff and works great. Oh no wait. Thinking about it it was 10 sq ft for $80 and 40 sq ft for $200. My bad. I think the 40 will do decent for my doors and liner and leave me some left over. I think I'll do the door skins as well, but maybe not at this moment. So back wave diffusors then? Go with what the shop had which I think I would have to buy 4 at $20 each since they looked a lil small, or go somewhere else, like a local home audio store and buy something different?