IMPROVE SOUND! Deadening Treatment EXPLAINED - Better Bass and Improved Sound Quality!

When installing an aftermarket car audio system the new more powerful speakers can make the interior panels vibrate and resonate. Sound deadening allows us to not only prevent rattles, but to improve our sound quality and bass output! We can also treat the vehicle interior to lower the noise floor making it easier to hear details within the music without needing to play as loud to overcome noise! How is this process done for cars, SUV's Vans and Trucks? Let's take a look on CAF Project Jetta, my current build I am working on!

A special thanks to SoundShield for sponsoring this video!

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🔊 Timestamps:
0:00 Intro
0:38 Budgets Explained
1:53 Materials Needed
2:39 Demo of Benefits
4:15 Removing the Door Panels
5:23 Treating Back of Door Panels
10:46 Treating Sheet Metal of Door
13:06 Treating Inside Door
14:37 Testing Doors, Treating Interior
16:29 Treating the Trunk

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Here at Car Audio Fabrication I teach you how to Master Car Audio in an effort to Design, Build, and Install your ideal car audio system. Whether you are a hardcore basshead or a HiFi focused audiophile I would love to have you subscribe and join our community!

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Car Audio Fabrication – Master Car Audio – Design, Build, Install

[robnation]

I slapped some inside the walls of my clothes dryer. Then took the door apart and put it inside. Dryer is crazy quiet now!

[Schnitzerci]

Now this is sound proofing. Most installers I have seen only slap a few strips here and there, mostly behind the speakers. Obviously some things are budget based, but I think this is the real deal. Not just two strips on your boot lid.

[strobaholic]

I did this on a 2005 Ford explorer. It made a huge difference. Not only for the rattling, but the road noise and ride quality was drastically improved. The whole vehicle felt like it was better built and felt more “premium” than stock.
It took me almost 2 weeks to complete though. What a pain in the ass! But well worth the effort!

[ciudfhn]

I replaced my head unit, and ran the stock door speakers for a couple days . . they rattled and buzzed like crazy! I was a bit nervous to put my new speakers in but, when installing them I put sound deadener on the inside of the door, I put foam on back of the speaker magnets, a foam ring around the speaker, and used this foam tape that goes around where you mount the speaker. After watching this video, I will admit I did not do anything to the back of the door panel so, I will be doing that on my next day off! Anyways . . It now sounds amazing! I am very impressed, full volume and no buzzing or rattling! I now have my amp and subs intalled, an d I have not done anything in the hatch yet so, the subs are creating some rattles in the back. I plan on doing that here real soon, and can't wait for the results! This guy is very awesome! His work is very beautiful!! I really enjoy, and appreciate these videos!!

[robertweekes]

The level of detail and logic behind these suggestions is impressive. It’s obvious you’ve been doing these installations for years !

[Bacnow]

Dude! Your “Midlevel” upgrade is 5 times better than most installer’s highest level sound deadening upgrades

[CarAudioFabrication]

UPDATE: If you are having trouble watching this video YouTube is currently having issues worldwide. I have found that if you are on mobile and tap "click to retry" a couple times the video will load. Please reply here if you can see the video now! This video has a TON of detail on the full process of sound treating the doors, interior, trunk etc. Be sure to come back and watch!

[rollingtones]

14:10 The owner and founder of Hushmat spent about 45 minutes with me at a training (yes, I had tons of questions). As a degreed acoustical engineer, he said that there is no benefit above 75% panel coverage. When he was designing noise control packages for several OEMs, he had access to sophisticated measuring equipment to verify this.
He further said that shops that cover 100% of a panel only do it out of fear that the client will think he is getting ripped off. Exceeding 75% adds unneeded mass to the vehicle. Dr. Porsche famously once said “weight is the enemy”.

[dylanmott]

im only 1 min in. but i remember watching you like two years ago when you were redoing your own small cars. this channel has gotten so much better! stoked for you dude!!!

[Clint_the_Audio-Photo_Guy]

I did that and more to my SQ build I did a few years ago. I siliconed any seams in the doors, and did 3 layers of deadener, then a layer of closed cell foam. Those doors were solid! Then I did carpet padding too under your feet, and got the whole vehicle undercoated, so you didn't get any vibration in the floor. Some SQ competitors will do even more. One guy had a couple hundred pounds of clay in the footwells of his regular cab pickup! Once they get into the clay or sand, in addition to the dynamat type materials and closed cell foam, then you know they're serious, haha. It's probably the #1 way to improve a system.

[SmalltimR]

Just want to say that I absolutely love your videos!
I consider them to be the best and most informative audio build series available!

[andrewjohn]

Around 5-6 years ago now the first time I did this sound deadening jazz I went way over the top. Pretty sure I went through 7 of the Dynamat megapacks, well over 100kg of dynamat. I double skinned the outside door panels, single layered both sides of the inner metal fab on the door. Used some tin or something and cut sections for the service ports and 2 layered up the 2 largest ports on the inside of the panel using the smallest remaining service port to do so, the last port was double or triple layered only from outside along with the 2 largest. Completely stripped the interior and boot of the sedan and single layered the floor with dynamat and then applied dynaliner. The entire parcel shelf has dynamat single layer on both sides with dynaliner cut and shaped for premium fit. Entire boot is single layered. At the end of it and particularly the doors my hands were a mess.

Everyone comments on the lack of road noise in the vehicle.

I run 2 Hertz SX300Ds in a CAF designed 42hz ported box off a RF 2500BDCP gains set 2000w RMS @ 50hz. Digital source all the way to Bit Ten D, gain structure is optimal.

When tuned right and volume set correctly they are awesome, the transition to the mids is excellent. To this day a rattle I have not found. I suppose that is an argument for going over the top with sound deadening.

[rollingtones]

16:38 One noise control measure you do NOT see in this VW (for cost reasons) are STUFFER BLOCKS, found in BMW, Mercedes-Benz, etc. - shaped blocks of grey closed cell foam OR dark grey polyester fill, like firm pillow stuffing. The latest version of this is NOISELITE, similar to THINSULATE used in cold weather jackets. When you work on a Hyundai Palisade you will see a small piece attached to each kickpanel.These stuffer blocks trap airborne noise as it moves around, not to dampen panel vibrations. We attack 2 kinds of noise: STRUCTURE-BORNE NOISE and AIRBORNE NOISE. The materials that stick to panels kill structure-borne noise (vibrating metal & plastic). The closed-cell foam used in SoundShield kills airborne noise that propagates into the interior from vibrating panels and other noise sources. You need to address both “sources” to be effective. In addition to these materials, I have started using stuffer blocks in my project cars. There are two more techniques I use that are more esoteric, inspired by Rolls-Royce.

[markphilpot]

Sure isn’t many questions after watching this video. Be careful and take your time. Getting in a hurry will cause more frustration down the road. Really good job explaining what to look for and not overdoing it. Great job Mark! Tah dah! Stay safe mates!😊👍🏻😷

[samuelfowler]

Ok i must say... holy crap. Ive ran 2 JL w6v2 10" for 7 years in my ctsv. Always sounded great. 2 weeks ago I watched the video and did the exact same treatment 4 days ago. Same material. Now I run a single 12" w6v3 and upgraded the door speakers with focals on the factory hu. The installation took 6 days (I have a daily driver). Not only does it sound louder with 300 less watts but the clarity is crazy. Added just shy of 45lbs but saved 66lbs with a rear bumper brace replacement. 1300 bucks later (including bumper brace) I weigh less but sound day and night better. I wish I had a channel so people understood this difference.

[rhodesianhunter]

So, I got sick of having a factory stereo and started watching your videos. You are a savant when it comes to your trade. Truly impressive! If I had the financial means I’d have all my cars sent to you. The audio equivalent of Rembrandt.

[osrr]

I've always had the impression sound deadening works well for just regular road noise as well.

[brettywap]

I wish you had this 6 years ago when I started my car audio journey. I learned everything the hard way, great content as always.

[gabrielricci]

Good to explain how the Decibel scale works for your audience. Some content creators are very disappointed that the only achieved a 3db change which is really eliminating half of the original sound.

[rollingtones]

I usually wrap a piece around the power window motor - it can make it slightly quieter.