Customer Ratings & Reviews

Everybit as good as the more well known products

This came free with a bundled purchase,.. and I also purchased some Rattletrap Extreme as this wasn't enough for the car. I was expecting this to be mostly unusable due to the Name.

I was wrong.. it was every bit as good in thickness and adhesion as the more expensive brand I had bought. So if you can get this cheaper than other Sound material,.. go for it.

NVX SDVK4

Works great at a great price. I have it under my trunk lid and it keeps it from rattling too bad.

Good product, not the easiest

Used a few sqft of this material, along with the equivalent from Streetwires (PartsExpress) and a ton of Peal 'n Seal (Lowe's) for the rest.

I would say that Peal 'n Seal was the easiest to apply, but also the thinnest (an cheapest). So if you are doing some serious job you may want to double or triple the layers.

The NVX material was the thicker of the three I used, and once it's glued it stays soft which is very good. But beware, you will never get it off again. The only thing I would reproach is that the aluminum is quite thick, which makes it hard sometimes to comply with shapes. But it is good to fill in big gaps or openings and add some rigidity.

My preferred material is the Streetwire stuff, which is a bit cheaper. It was thick enough and compliant enough to make it really easy to install and it sticks like crazy while being forgivable if you make a mistake.

Have fun!!!

awesome

simply amazing before i installed it i could not hear a clean bass at all by trunk was rattling so much but now my trunk is solid and i'm enjoying the bass it's cheap and awesome NVX for the win

NVX better than the Rest

Great price, great quality. Plus delievery came fast. Will buy again for rear door.

NVX SDVK4

I USED THIS PRODUCT TO INSULATE THE SHEETMENT AT THE KICKPANELS AND THE FLOOR AREA BEHIND MY REAR SEAT IN MY1972 VW SUPER BEETLE. THIS PRODUCT WORKED OUT GREAT FOR ME, NO VIBRATION, REALLY QUIETED THE ROAD NOISE ALSO. OVERALL A GREAT PRODUCT.

Great product!

This is the first sound dampening material that I've used so far and I have to say that I am quite impressed with the product. I used it to reduce the vibrations generated from my sub at the back of my car. Since then, sound quality has improved considerably. For the price, I strongly recommend this product.

awesome

this is the best stuff for the best price now

works great

Less weight than other sound proofing I have used, cuts easy and with a hair dryer it will mold to any contour .

Perfect kit foe speaker installs or a single door.

This deadener works wonders for vibration and outside noise. It is thicker than Dynamat and will eliminate that horrible resonance caused by lower frequency notes transferred through sheet metal and rattles in plastic. It also improves sound quality and SPL.

Didn't see a difference for my car.

I'm sure this may have different results for different cars. I simply bought this dampening kit to fix the rattle and keep in the sound. I'll give my list of pros and cons. I own a 2000 Honda Civic.
Pros: Installation is very easy. Simply peel and apply. It's recommended to have a roller to get in the cracks (which this kit does not come with). This kit does keep in sound. Outside the car you can barely hear the audio (in terms of actual music, not bass).
Cons: This con is pretty much based on the vehicle I have. The mat did not fix my rattling problem. I placed it everywhere possible in my trunk and I still had constant rattling. Really a disappointment when that's the main reason I bought the mat for.

Good stuff

This dampener does what it's supposed to do. Didn't get to use it how I wanted to, but that's nobody's fault but mine.

NVX sound dampener

This product is easy to work with. You just need to peel it off and apply. I suggest you use a rubber roller with it.

Excellent

Great stuff. And I mean GREAAT. Gets rid of unwanted flex and looks appealing. Can't beat the price either

bon produit

je ne connaissais pas mais pour le coup,il est formidable mais toujours le problème de facilite d' utilisation.

NVX SDVK4

The material looks and feels like a good quality product. It's heavy and got a thick aluminium backing. Additionally it's easy to work with and forms nicely to the contours of any surface.

I recommend this product.

Quiet Performance

If you are looking to improve the response of your speakers, look no further. This material helps dampen the area in which it is installed. I placed this material in the doors of my truck which improved the sound quality in the vehicle. I would never install any speakers without this material. Install, you'll be glad you did!

Great Stuff!!

I bought a small amount of this stuff wondering how well it would work to just eliminate the rattle in my trunk lid. I drive an E30 so the trunk lid is really light and rattled a lot.

Once this stuff was on, about 90% of the rattle was gone and this was just enough to put on the underside of my trunk lid. My bass inside the cabin also seems to sound a lot more clearer too. This won me over for sure.

Can't go wrong with some NVX!

I installed it with a small floor seam roller I picked up at Sherwin Williams and a hair dryer to heat up the material a little bit to make it more malleable to fit the curves of the bracing. Super easy to install. Took me all of maybe half an hour. Just make sure to clean off your surface before installing.

NVX SDVK4

Good product at half the price of other brands.Will be ordering more.

What is This Stuff?

When I ordered this stuff I really did not know what it was or how to use it but it became very apparent. I cut this sheet larger than the hole for the speakers and pulled the adhesive off and stuck it over the hole then cut slices from the middle of the hole and folded it under so all edges were smooth. Installed speakers on top of this and there you have an airtight cushion that the speaker sets on top.

Better then dynamat

This product work better then dynamat and its way cheaper! I would reccomend this to everyone I used it in my door panels and there is no rattle what so ever!!! Thanks sonic!!!

Good value, thick material

Much better than some alternatives I've used on Ebay. Thick material dampens vibration and road noise quite well.

By andrew on July 13, 2015 Verified purchase

good speaker

I bought these from a local dealer for a really really good price. I needed to replace the stock speakers in my saturn so these we goin to be much better anyway. Well I started with the doors and I was impressed. A week later got another pair for the rear, and man does it sound good. I have an older Pioneer deck, with hpf, although they sound good with it on, I believe they sound much better with it off. at high volume with the hpf they tend to be a little bright for me. but with it on the bass and highs sound perfect. jammin out in my car never sounded so good.

Great quality/Value!

Used it on the rear speaker panel. now, less vibration and good sound.

I would recommend it.

By Zjon on August 24, 2015 Verified purchase

JL Audio TR650-CXi review

Very rich sound and brings out the high and lows. The cabin of my Mercedes Benz comes alive with lively sound.

Good products pay off

This is my 3rd set. I run them on JL amps for the best SQ. Think I'm happy look in the forums video contest 2010. Caddy EXT Dj Cadillac Bob. Just an example. I turned on my caddys system and shut the DJ equipment down at a carshow and the guy who brought the gen to run the carshow equipment asked if i was done with the power. HAHA I had already broke done the dj gear he was hearing my truck loud and clear across a very large parking lot. JL strikes again. If you got the extra coin flip it. You're going to get a good product from JL everytime. Thanks Sonic

Average Speakers

These speakers are average......rattle a bit with the bass.

Great Speaker.

I bought these speakers over a year ago to replace some very worn and abused factory speakers in a Saturn. They are great speakers. with just 6-1/2s in all locations(4) i had more bass then anyone would really want in a small car like that. I ran them off 3 different Pioneer headunits. Finally settling on a deh-6300ub (awesome unit). I eventually sold my sub and amp and just rocked these. Rock, Rap, Dubstep whatever these things killed it. Just sold my car, im sure the new owner will love them as much as i did. Probably going to have to replace the very worn and abused factory speakers that are in my new car as well..... hello JL!

Nice speakers

Entry JL is better than most mid level speakers from other speaker manufacturers. I had 4 of these in my jeep and they sounded very nice. Modestly amped and they sounded great.

JL TR650-CXi Review

I have upgraded my stock RAV4 front speakers with these TR650-CXi. What a difference they made. A more rounded sound with the highs very clear and the bass, absolutley sublime. I was thinking about putting a sub or an amp, but honestly the speakers on their own are fine. All I would need to do is upgrade the rears now. The bass is soo powerful and rich I could turn it down on the HU.

Pros: Great value and really improved my system, even at low volume the bass is still present and of great quality. Wish I had gone for the JL C2s now.

Cons
Wish they had Silk Tweeter Domes like the JL C2s

Good sound, but questionable power handling

I use these for the rear deck in my GTO, they fit well and the highs are very crisp and detailed. They are powered by a Clarion Dux385sat head unit, which supplies them with 20Watts RMS, which is well below the advertised power handling. The headunits volume goes to somewhere in the 30s, but anywhere above 24 these speakers break up and distort. I am certain its not the head unit because I've cranked other speakers with it and it sounded fine. A High pass filter at 200 Hz helped, but I still will replace these when I have some money to spend

Need a amplifier!!!!!!!!

I have owned 4 of these for around 4 years and am not as satisfied as most people that reviewed these!! First off these speakers need a 4 channel amp regardless of what your head unit is pushing. For 3 years i ran these without one. They do sound very crisp on the highs , but as for any bass/lows at all, there is none!! NONE at all!!! I am running these on a Kenwood KVT-717DVD head unit which is 50wattsx4. No bass at all out of these. I never really was concerned about it till i blew my Kenwwod 10" sub. I was not expecting anything great bass wise out of them but no bass at all, COME ON!!! I bought a 4channel jl amp (for way to much mind you) that is 400wattsx4 and now I am pleased. They sound amazing with a little juice running to them!! I also replaced my sub with a 10" Eclipse recently, WOW. I love Eclipse Audio f'ing slams. Have to turn off the bass somtimes cause I cant see straight!

I love JL Audio dont get me wrong but if my expieriences can help someone before they make this purchase then I will be as honest as possible. They are good speakers just get a freaking amp or you may be dissapointed like i was!! By the way these are at a very resonable price considering I paid 400+ for 4, 4 years ago,LOL!!!

If you just want a good sounding set of speakers you dont have to get an amp for then thesae are not them. Go cheaper and you will be more satisfied for sure.

Excellent Sound

Was time to replace the worn out front speakers in my 2001 Silverado. This truck came factory with components in the front but I did not want the expense or complications inherent in installing new components. These speakers went in perfectly without adapters and the sound is amazing. I run a 10" sub in a sealed box under the rear seat so bass not my concern. Chrystal clear sound and plenty loud even with just running them off my Pioneer DEH-7400-MP deck. I am sure you could amp these for more volume but that would be completely unnecessary. Had to play with the sound setting and EQ on the deck to get better sound but all in all very simple set up.

great sound

Its the best brand to have and they sounds so clear! Recommend them to any music lover.

Quality product

Easy to install,works great for the purpose. May want to buy larger amount of product if doing more than 2 doors!

JL Audio TR650-CXI

I am a fussy listener and would not recommend this set. This is claimed to be a 2-way speaker but the woofer barely puts out any sound. At first I thought I had reveresed the polarity in the wiring, and I tried powering them with an amp, but nothing seems to resolve the issue. They do provide detailed sound, but if you do plan to go ahead with these speakers, I would recommend considering these only as a pair of tweetesr, and get a dedicated subwoofer for bass duties.

Easy installation

Was buying home depot junk than got a roll of NVX. Lays down great and stays in place! Made a world of difference in my 500 hp trans am with exhaust you can hear a mile away. Could actually talk inside the car after laying it down on the rear of the floor and hatch area. Have bought more since and will continue to!

By Richard on March 24, 2017 Verified purchase

Works very well.

This is the first time using sound deadening material. But i can tell you this is worth it.
Makes a plastic factory sub box more solid.
Great product.

worked perfect

very easy to use. careful tho. only 4 sq ft not the 4 cu ft i thought. misread and assumed. my mistake. covered trunklid and works like a charm

By Anonymous on March 5, 2019 Verified purchase

Good Stuff....

Much better than thinner sound dampening material on Amazon. Easy installing, works great!

By Anonymous on July 28, 2018 Verified purchase

NVX SDVK4 - 90mil 2.3mm THICK

Works great. It’s perfect for every application and completely eliminated the annoying rattle from the trunk.

Awesome stuff

Previously bought the NVX door kit and was highly impressed, its just as good as all the name brands . Purchased this to finish my build ..even have NVX amp and speaker wire kit , NVX hands down is the real deal .

By Chris on September 28, 2017 Verified purchase

Works Great!!

This is the 2nd time ive used NVX dynamat for my vehicle and it makes a difference everytime. Ive acually used on the exterior of my vehicle under the body panels of my cadillac fleetwood which has a bunch of chrome panels and it does the job! Would definitely recommend to stop rattling on your vehicle!

By Edward on September 6, 2017 Verified purchase

Looks good

Didn't get a chance to use it yet but seems pretty good

Great product

Great product at an outstanding price. Easy to install and definitely helps with the sound.

Great choice

These subs sound awesome in my truck. Best subs you can buy for the money.

Easy and effective

Easy install for the trunk, Would need more for doors in the future

By Anonymous on June 26, 2019 Verified purchase

Great cables

If you are looking for a set of 4 channel wires these are the ones you are looking for.

By Ronny on January 23, 2017 Verified purchase

Best Price

This stuff works awesome and the price was perfect. I will definitely order again when I get the extra cash to line the rest of my trunk!

Solid

A nice solid piece of sound dampening. Works as needed and isn't hard to install even without the right tools.

By Justin on July 1, 2016 Verified purchase

Better than the others

Stuff is as thick if not more than a lot of other more expensive brands.. I have never heard of nvx but with this type of quality I kinda want to try their subs out now..

By Kelvin on March 13, 2016 Verified purchase

Great Sound Dampening Material

I used this to line the front doors of my car. It is very easy to cut with a utility knife and the adhesive is very tacky. I applied with the handle of a screwdriver which worked great. Applied around the speaker mount and inside of the door panel. Door skin is now very solid sounding and midbass also has a more solid sound. I will be purchasing a bulk pack in the future to apply to my entire vehicle.

Take note that there are other things that rattle than the metal before stating this product does not fix rattles. One, it could be that you did not apply to the area that is actually rattling. Second, be sure to wrap all wire, cables, and some mounting clips with fleece TESA tape, which is sold on this site.

By Anonymous on February 3, 2019 Verified purchase

Excellent product

Every bit as good as the big name sound deadeners without the big name cost. Entire car is covered with this product and its mercedes quiet.

By Tony on January 15, 2018 Verified purchase

Great product for the money

Great stuff really does a good job would recommend to anyone looking to get a quieter ride

By Michael on March 16, 2017 Verified purchase

Super sticky, super sound proofed, super oh ya

The youtube video definitely helped me get the strategy to roll this stuff on correctly. Thank you to Allyn for all the videos. I have now mastered my DIY skills in car audio.

NVX SDVK4 - 90mil 2.3mm THICK

used this to sound deaden my tailgate, could tell the difference this made when tapping on the metal!!

By Anonymous on November 12, 2019 Verified purchase

Randy In Lansing

great stuff. I have used stinger before this one as they really are a must have on 85% of the cars out here if you want good sound. I would say its a very fair price as i think there is only 1 other sound damper that is cheaper but it also is .02 mill smaller. so all and all it was a must have as my Infinity Kappa 60.11cs speakers sounded like crap until i put this in and now the are the best sounding speakers i have ever had

By Randy on January 8, 2017 Verified purchase

Toyota Tacoma

I put this on my Tacoma since the box of my speakers were hitting metal, once I installed this nothing but fire from the base then before when it was all metal hitting

great value

I got some free in a nvx amp purchase and it came in a box and was not creased or anything, looked great and was comparable to the q mat I had

By Kyle on March 27, 2016 Verified purchase

easy install

Took out all vibration noise

By Frank on February 15, 2026 Verified purchase

jl audio all the way!!!!!!

the best in the business from day one.. i had bought these sets a while back now and im now writing a review.... i must say high quality and my saying phrase stands the same: (you pay for what you get) my car sounds like a surround sound theater..

By Hamant on February 15, 2016 Verified purchase