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

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

infinity kappa 462.9

I purched these for a 06' chevy silverado crew cab .this is my second set I have purchased .I love the sound of infinity .great highs even for the size of speaker .haven't installed them yet . But hopefully soon .well post more later .no cons you cant go wrong a setof these

lovely speakers

Great sound out of such a small package. And great service from Sonic Electronic on the purchase!!

Good sound

Product worked perfectly as described and install easy. Well worth the money. Kappa Series speakers are the best infinity speakers I have heard.

Quality product

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

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.

Good things in a small package.

These were recommended to me by a friend and fellow audiophile for my GMC pickup.

The highs are so crisp, clear, and bright that I'm beyond words to accurately describe them. The amount of bass put out by the woofers on them is actually significant (and surprising for their size!) They fit perfectly in the factory holes in my truck (though I did have to drill new holes, and had to mount one speaker upside down to clear the structure of the cab).

BEST option for 4x6

These speakers are simply awesome. I ordered them from Sonic Electronix about two weeks ago, along with a set of matching Infinity Kappa 62.9i coaxials. I had both sets installed today in my Sierra reg cab, along with a Kenwood Excelon KDC-X794. These speakers are very, very, very clear and loud for 4x6 plate speakers. Highs are crisp, not harsh. I would definitely recommend them to anybody & everybody who has a vehicle with the dreaded 4x6 speakers from the factory. These speakers will bring your music to life!

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 4x6's

These things are amazing. Very clean sound and no regrets. Have em in a S10 (2003) and they fit perfectly.

Great product

Infinity Kappa's are a great sounding high. They don't produce base, but what do you expect from a 4" speaker. The separate crossover is excellent at directing traffic for the speaker.

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 product

These speakers sound awesome with the theater on the side made a huge diffrence in the sound of my truck very good price and would buy again

Crisp, but lack lows

I used these to replace factory 4 inch rounds for rear speaker pods. they sound nice for radio, and mellow songs. However, they get overworked and bottom out while listening to pop, hip hop, and country with a lot of deep notes. Would propbably be very nice if paired with larger speakers for the lows.

Great Product

These are by far the best 4x6 speakers out there. I've heard a lot of them and these are far superior. They also have a great look to them. And they are VERY loud and clear when pushed by a Kenwood 65RMS per channel amp. Would definitely buy again.

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

good value

great sound quality as expected from infinity very sharp highs and good mid range.

Best speakers ever

These speakers are great sound is clear loud everything I was looking for from infinity and great buy for your buck it's well worth it

Excellent Sound Quality

This has very good sound quality and the overall fabrication is very good but one of them came with a short in the terminals that I have to fix before the installation, after that everything worked fine. i love them, they sound better that my 6.5 component from focal.

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.

Great product

These speakers sound awesome with the theater on the side made a huge diffrence in the sound of my truck very good price and would buy again

Best bang for the buck

Infinity is a well respected company in the audio world, making good quality products at a great price. For the size of these speakers 4x6 they sound really nice and have nice features like the screw in terminals and the Db button. With that being said if you have a car that takes 4x6 these are the best bet. Just a note for Pontiac Sunfire owners these plate speakers will not fit flush in your car. Due to Pontiac designing its enclosure around the standard cone+tweeter style the plate will sit a little off center in the sunfire. You can get them to fit but like i said it will not be flush with the enclosure and you will have to figure out a way to fill in the gap it leaves. (mine came with some strip foam which seems to work well). I would buy these again if i had the choice

Excellent 4x6s

I had tested these speakers out before I gave them to someone else.. They sounded pretty dang good. The highs can pierce your ears at times.. So i would have to turn the highs down on my head unit. They do get distorted at 3/5 sound volume turned up. They are a great replacement speaker and I got them on sale at a steal of 79.99.. Cant believe they doubled that now.

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

loud little suckers!

Not much low end but the mids are good and the highs are downright insane! and that's running off a 22W rms excelon head unit. Just set you high pass to 100hz and you're good to go if you have subs. Without subs they still sound great they just bottom out fast at high volume. I love the clarity and I will be getting two more soon!

best for their size

Highly recommend these little beauties. They sound amazing with 75 RMS. easiest install ever. Kappas are the only way to go for quality sound and always a great price at Sonic. Thanks Andrew in tech support. You sure know your stuff.

Great Highs!

Overall good speakers for the price, excellent highs and decent mids (perfect with amplifier). Perfect front speaker for any car.

Wow!

I bought these speakers almost two years ago. They fit great in the factory location. The sound is clean and crisp. Couldn't ask for anything more. Wasted time and money on other 4x6's to try and match the sound quality of my other speakers..... now I have to purchase other speakers to match these 4x6's. Outstanding product.

Great sound

The speakers are very clear and crisp. They are mounted on the dash by the windshield and have greatly improved the sound of my radio

Infinity 462.9cfp

i bought these speakers and put them in the dash of a 97 s10. They sound great they do not distorte no matter how high you turn them up as long as you amp them they are clean and crisp delivering ear pearcing highs

Best 4x6 Option

Running these simply off my Kenwood KIV-701 headunit and they are clean and crisp sound, not much bass goes through these so my 12" sub really made it complete. Sonic has the best pricing and would highly recommend these speakers for the price as well as the rest of their low priced products.

Great Speakers.

I purchased these speakers for the kick panels in a 1968 Corvette. They work perfectly. The sound is great and they are exactly what I want. I would highly recommend the Infinity speaker and purchase from the vende. It was quick service and a pleasure to do business with.

Crisp clean sounding speakers

Let me start by saying that I bought these for personal use and not for competition. Having said that, they were easy to install, great sound, great value. I bought the speakers and am happy with the purchase. I have them powered by a kicker 150 W RMS @ 2 ohm amp. I was only able to turn the amp up half way so I'm thinking the "true 2 ohms" is not completely accurate... but the speakers still sound great!!! (There have been a couple of times that I had to turn the volume down cause the tweeters were literally beginning to pierce my ears)

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

Great sound

These 4x6 plates from infinity just sound great. They can handle some decent power. The clarity is so crisp and clear.

Great speakers!

I brought these speakers hearing they were good quality speakers and so far they were right. I have them hooked up to my 4 channel alpine and it doesn't distorts nothing just very loud for my ears. Great speakers and no regreting them. The sub is not in the middle so make u got some room or make some room for it.

Best speakers I've had!

For the size and type of speakers, they're some if the best I've ever had. No problems at all, totally satisfied!

great sound

excellent product with a great price

awesome deal!!

very good quality, sounds excellent, good price with huge savings vs. the stores, i would recommend this this to everyone wanting good quality sound and product at a good price

CLEAN CRISP SOUND

Great sounding factory replacement speakers! Not quite as loud as I like but definatly CLEAN sound. With a small amp they would rock out!!

4 x 9

I love these speakers because of the sound and performance from them. The look is also neat and easy to hook up. I would definitely recommend these speakers to new buyers and they would be happy with the products.

Excellent Quality

I ordered the Infinity Kappa 462.9cfp because my brother whom installs at best buy referenced them. This is by far the best Quality of sounds I've heard around my side of town(West Orlando, Fl) If quality is what you want for a not so high budget, then I most definitely suggest you go with infinity. I also got the six inch door speakers and plan on getting two infinity 12" sub's. Also two infinity five amps to supply the power. Long story short Infinity has persuaded me to make up my whole car with their products. Lastly thanks so much to Sonic Electronics for the fastest sending time I've ever received. I received my order a day ahead of the scheduled time.

Kappas rule

I purchased these for the rear doors of my GMC extended cab truck and they fit perfectly. They sound great but don't handle a whole lot of power - especially if bass is turned up. I have Boston components in the front and sound impressively close to their level of sonic beauty.
My only complaint: they come with a bulky crossover attached to the speaker. I failed to secure this crossover separately and now rattles inside the door over bumps. I will have to remove door panels to tie them up to fix. Minor issue and it's my fault as installer, but it is annoying.
Other than that, speakers have very clear mids and great highs. For small plate speakers, I was kind of impressed there was any bass at all and there was some, a bit minimal. I recommend

Awesome Sound

These have clean sound at high volume. Would recommend to people who want to up grade or for the people who want the BEST.

Great speakers

Installed easy, sometimes they draw too much power from my Kenwood deck, but I just turn them down and enjoy great imaging and crisp sound.

i love these speakers!

these speakers are the best dash speakers on the market, they get loud and clear !

Great Value!

This product sounds great! I've been through many speakers and I have finally found the ones that work great. The pros to this product is the sound quality and the affordability of it. There aren't any cons. I would highly recommend Infinity Kappa 462.9 cfp to anyone. Its a great buy!

Clear speakers normal ranges

I installed these in a 2004 Silverado and they sound great up to about 80% of the radio's max volume. I would not recommend them for anything more than 50 watts. However, for normal listening range these speakers sound awesome.

Fantastic speakers

I purchased these speakers and I am so glad I did, these are the best 4x6 speakers I have bought. I purchased these for my 2004 Jeep Wrangler. The space was limited for speaker installation and once they were installed the sound is incredible. If you want a great pair of speakers, I highly recommend these.

By Bryan on May 21, 2015 Verified purchase

GREAT SOUND!!

I purchased these for the rear doors of e ext pick up truck, i wanted the component sound without having to modify the door in any way. These speakers fit the sound and budget i had in mind. Sound is clear and bass response is perfect.

Sound

I replace Infinity REF 4*6 with these and it's a world of difference and for the size of these speakers they play a good amount of bass with-en there range. If you tune these the right way then they will do anything you like just remember they do great for the upper end of the mid-bass and higher cross them over at 120-150hz and have a good head unit to tune them better and everything should work out just fine. To try to do anything more is just plane stupid with these. There in the walls of a reg pick-up too.

INFINITY THE BEST

I always like infinity speaker, 2yraers ago my truck got stolein,they took everything. Started shopping around and found sonic eletronix online. God bless me in this direction now i get all my stuff from them these speaker are on hit, great value at great price.
Thanks sonic!

Good choice

These are the best front door speakers I have ever heard. They are on a 1000x4 Lanzar amp from sonic as well as the 6x9's to match. They sound clear at any volume, and I can't even turn them up all the way to test them because they are too loud to test with someone in the car, they can hurt your ears. Very good.

easy install

Took out all vibration noise

By Frank on February 15, 2026 Verified purchase