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

MB QUART ONX 157

Great speaker for the money. Definitely an entry level Quart but great sound reproduction non-the-less. I wasn't going for professional level audio just something better than stock. I have a ford pickup and WOW did these speakers wake up that factory deck. I'd say not only a clarity/detail improvement but a Volume level improvement aswell. The only thing they lack is bass but really its a 5x7 what do you expect. (Also I'd like to add the placement and size of cab are not lucrative to good bass. Oh and they are a million times better than the factory speakers.)

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

Solid Speaker for the Money

I got these speakers for my "budget" system replacing the stock speaker setup in my '02 Forester. I've been building up my system in stages first replacing the head-end with a Kenwood KDC-X596 (excellent!!!). I've since added the MB Quart ONX216 separates for the front and purchased the ONX157s as fill speakers in the rear doors kick panels. As the stock rear speakers are a bit odd 4-1/2 size, it took some significant cutting and fabrication to fit the space.

The effort was well worth it. As expected, the ONX157 are a far more efficient than the speakers they replaced. The mid-bass response really rounds out the sound, but I have to admit that I'm a bit surprised at the lack of high end reponse from the 30mm tweeters. I'm sure its location so low and forward in the rear doors don't help. Clarity and detail are impressive for a "budget" 2-way. I'm expecting performance to improve once they break in.

I'll be adding an amp (ONX4.60) and an 8" sub to complete the system. I had planned to run the fronts and sub off the amp and continue to run the rears from the receiver (22w), but they may need a bit more power to improve imaging and soundstage.

The ONX157 speakers are a solid value-for-money. The construction and build quality are about as good as it gets. The magnet size is considerable and immediately reassures that you've got a quality product. Highly recommended.

Quality product

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

YES!!!

Everytime i turn my radio on I pee a little from over-excitment

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.

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

Pretty good little speakers...

For $35 bucks, you cant go wrong. Just understand they are not worth the "retail" of $130. No way. But solid great sounding unbeatable speakers for $35 any day.

They look great. Sound very good too.

Tested on 100 watts and installed on 22 watt head unit. Sounded great on both.

The magets are huge for the size also.

Cons:

The basket is very, very thin sheet metal. You can actually bend the speaker frame very easy with just your fingers. Yes seriously.

Manufacture quality- well, they are good for the price, but again understand. One of mine had the surround glued to the cone off center and angled. It looks warped. The other one is better but also has its own defects.

They are a little deep, and the front plastic ring is not removable, so bottom mount might be an issue if you need clearance.

Ohh yeah and no grills. Thats ok though. I didnt expect any.

For me, they are fine. They sound 100 times better than stock. Not as good as my good system, but for a work truck, I couldnt be happier for the cost.

Conclusion. Probobly the best $35 speakers out there. For a little bit more though, you can find a better product but at this price, very good.

By B on August 10, 2015 Verified purchase

sounds clear

The service was quick, accurate and on point .the price can't beat it . The speakers sound loud and clear with the new deck, far better than stock really impressed the tech with the music quality, alot of times you lose the music for the base ....not with these

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

Ok speakers

Average speaker at a good price. Decent mid and low, but a lot of distortion with vocals. It also won't fit in the front doors of a 2012 Mazda 3

Okay for the money, but...

The $35 pricetag should have told me, but sometimes you get more than you pay for in car audio. This however is one of the cases where you pay for what you get...maybe a little less $35 gets you $35 (retail) speakers. They sound okay and that's really all I'm asking of them. I'm using 2 channels of a head unit (22W RMS reported) to use these for rear fills while the front satellites are amped. Actually once I got all my gains set up, I can't really hear these. But when I could, when everything was running off the head unit, they provided decent fill.

I was initially attracted by the construction materials & that I had owned Quart stuff in the past. I discovered on delivery however that Quart isn't the same company they used to be. The mounting tab metal is so thin it made me nervous handling them. That same material makes the basket as well - which is sort of curious. This driver flexes with great ease. I realize that once mounted the flex will be minimized, but with the shape of the basket so easily changed, so goes the shape of the cone.

If I had this do again, I'd leave these on the shelf. They sound okay and will work for a pair of shot factory replacements, but I'm having a hard time recommending these to anyone...even considering pricepoint.

By Beaver on November 23, 2015 Verified purchase

Decent for the price

The highs have trouble coming out clear when turned up. Mids and lows are alright. Still a lot better than stock.

MB Quart ONZ157

I put 4 of these 5x7's in my 2012 F150 Supercrew pushed by a Pioneer AVH-X6700DVD. Sounds so good! Really loud and super clear. Don't let the price fool you. These speakers sound great! I wouldn't hook them up to an amp because of their low wattage requirement. Sounded good with the factory head unit. Even better with Pioneer DVD player.

easy install

Took out all vibration noise

By Frank on February 15, 2026 Verified purchase

mb quart onyx

Good speakers great for the money sounds clear and precise

Easy and effective upgrade...

One of the best bang for buck 5x7/6x8 factory replacements out there.
Good build quality and clean sound make these an easy pick for an OEM swap. Driving these with power from the HU and that's really all I need.
I'm sure an external amp would open these right up.
They could have included speaker wire but no big deal.
This is the 3rd pair I've had and never had an issue...

By Jim on October 21, 2015 Verified purchase