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Fix rear deck subwoofer rattle, improve bass in 2013 Accord

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So as you guys know, I own a 2013 Accord Touring sedan with the 7 speaker premium audio system. Like, "premium" audio system -- it has 7 speakers, but they sound like crap (Good luck if you have a 4 speaker system without tweeters... oh man).

Earlier this year, when I got my car, I have upgraded all the speakers. The front has a Polk db6501 component setup, while the back has Polk db651s taken out from my old Civic. For $250 worth of equipment, I have vastly improved the audio quality on my Accord.

 

Unfortunately, I still suffer from 2 problems. Firstly, the rear deck rattles at the hint of any bass. Secondly, the rear subwoofer is seriously weaksauce. I can barely hear it -- other than the rattles -- when it is maxed out. I am looking for a balanced system, and since I wasn't looking to shake my entire neighborhood or anything, I was pretty sure I can get a little bit more out of the stock sub. After all, I don't want to give up any trunk space.

 

First, the rattle problem. The car's rear deck frame rattles against the plastic cover, which causes the rattle. To fix it, I decided to line the entire rear deck with carpet. Therefore, I bought a roll of thin foam carpet from Canadian Tire for $20, and got to work.

 

p6cXsi0.jpg

 

Equipment needed:

 

- Nylon pry bars (For removing rear shelf -- optional)

- Scissors for cutting the carpet

- Glue gun for holding down the carpet (Optional but recommended)

- A socket/wrench set for removing the bolsters

- The carpet itself :P

 

WqLILii.jpg

 

I started off my removing the rear shelf plastic. It's an incredibly simple procedure, which I have posted here. Next, I took the panel inside.

 

6Ri4krk.jpg

 

As you can see, Honda already has some insulation on the rear deck plastic, but it's not enough. Also, while I was doing a raw test on the speakers at the back, I noticed the rings on my Polk db651s were rattling against the metal when the subwoofer is blasting. Well, that's a 2 part problem.

 

xQkqWMd.jpg

 

I went ahead with lining the entire rear plastic piece with carpet, and cut out where it is appropriate. Keep the circular cutouts from the speakers, I will be using it later. I dabbed a bit of hot glue to hold the carpet in place. It's not really needed, but it makes reattachment to the car a little easier later on.

 

cRclZZr.jpg

 

Using the circular cutouts from the rear deck lining earlier on, I made a ring out of it, and used it to dampen my Polk db651s rings. I added bits of carpet under the screw tabs to make it completely dampened. Finally, I reattached the panel to the car, and everything looks normal again.

 

The results? All vibration problems fixed, and it greatly improved the bass performance of the subwoofer. It dampens all the area around it, which makes the bass a lot of pronounced and much more solid. For $20, it's a cheap fix for rattles and a great improvement to stock subwoofer bass output (Y)

 

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Just one thing, it won't magically boost your bass to amazing levels like you have with a dedicated sub and amp. You only have so much power going to the stock sub. It just improves it and make it sound a lot better, but don't expect massive miracles.

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I'm pretty surprised how a bit of carpeting can make such a big difference in bass (other than fixing the rattles which makes sense).

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Well, it dampens it. With all the glass and other surfaces in the car, especially for a deck mounted subwoofer, makes for a terrible combo for bass.

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Sorry to resurrect this thread but...

 

Chc,

 

What brand of carpet roll did you buy? I can't seem to find anything similar to fix my '08 Accords bass rattle in stores and I always get strange looks when I ask at stores. They always just tell me to get dynamat/hushmat.

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These are literally generic cut-to-fit foam carpet. Mine is a 72x36 roll used for people who don't have OEM floor mats or something. If you go into any automotive store, go into the floor mats section, and you will find these. They're not made for audio, but it works wonders.

 

Don't use these on your doors though. It's going to be too wet in that area. Your rear deck is okay, because it never gets wet there.

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Sorry to resurrect this thread but...

 

Chc,

 

What brand of carpet roll did you buy? I can't seem to find anything similar to fix my '08 Accords bass rattle in stores and I always get strange looks when I ask at stores. They always just tell me to get dynamat/hushmat.

Youll need Dynamat for front doors only if that's Rattling. Regular carpet does for the Rear deck which any auto parts store should Carry.

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You can't really not remove anything... and those are a real mess that you can never clean off. Do not attempt!

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