Customer Ratings & Reviews

Great deal

Got this product free with the purchase of a pair of speakers it helps out a lot looks more professional and sounds cleaner definitely give it a try for your next project.

Don't go without it

This really helps with overall sound quality, especially mid-bass in my experience. NVX offers excellent quality at better prices are than other popular sound deadening brands.

By Anonymous on September 9, 2019 Verified purchase

Very Thick Dynamat

This product is very thick compared to cheap versions. Priced excellent. If you want to reduce any vibration or road sound, choose this!

By Adrian on June 21, 2020 Verified purchase

Very pleased

I am glad I went with this brand. Easy application and works great in keeping my Corolla quiet and audio clean.

NVX SDBSK2 Premium Stealth Black

Thick and heavy. I was suprised with the actual quality. For the price they’re great quality

Good product

Sticky and did hook well to the cars body . Got it for free with my speakers purchase. Sonic electronix for life

NVX SDBSK2 Premium Stealth Black

For the price, I wish it came with a bit more of the material compared to other packages, but it definitely does what it's supposed to and will make a noticeable difference if you knock on the door/panel where it was placed vs where it wasn't.

By Anonymous on June 12, 2018 Verified purchase

NVX SDBSK2 Premium Stealth Black

Easy to use and reduced vibration, allowing clear sound coming from my door speakers.

Great value

I installed these on each rear door of my 2005 Silverado. Could really hear a difference in sound quality.

NVX SDBSK2 Premium Stealth Black

Great product, Sonic Electronix is great. I've ordered a few things from time to time and have had no problems. I get the item quickly. I ordered this and was so pleased. I ordered another set. Works great.

By Joshua on May 25, 2020 Verified purchase

Rockford Rocks

I bought these component speakers knowing the sound quality will be better than most based on reviews and research, and it was spot on, the clarity and power handling, reproduction was accurate, very easy to mount in tight spots. made six MDF panels for eight of the 12 speakers, not including the two 12's (JBL) myself for my 95' Mazda MPV and I must say. clean music everywhere! Thanks Sonic.

Perfect

Second time around with these speakers and I still am very impressed with the way they sound. I have them paired with Polk audio mm series 6x9's on a 600w amp and hurt my ears at the max tuned volume.

Great speakers

These speakers sound great and were very to install. These speakers are in my 98 honda civic and could stand alone and produce great sound beside my two twelve inch subwoofers (Rockford Fosgate P2's), you add some rear 6x9 full range speakers as fillers and you'll be set.

Awsome!!!

Very good sounding components, very easy installation don't have a separate crossover to install built in woofer. tweeters sound awesome.

Love it

Love this stuff it the best sound for you money.

Perfect Compliment

Rockford Fosgate have always made great products. These speakers are very efficient as they are pretty loud with radio power only. I can't wait to power them with an outboard amp. Thanks.

Installeld in E60 BMW

As with all Rockford Fosgate products the quality of this product is outstanding. I have installed them in the front doors of my E60 2007 5 series BMW with the tweeters in the OEM tweeter holders in the doors. I had to do some modifications to the OEM speaker mouths to fit the drivers but there were no clearance problems. I am powering them with the Rockford Fosgate PBR300X4 and they sound great.

The only negative is that the tweeters are too bright (too loud). I first put them out of phaze but they were still too bright for my liking so I eventually muted them by sticking some double sided tape on one half of the tweeter.

Real review

I always thought these reviews were fake, just company's putting stuff on here to get you to buy their product. So I wanted to do one to show some of my friends that they are real. Well anyways, on to the product
These 5.25 components are great, very good sound quality. The tweeters are crisp and the mid bass is decent. I was a little worried because my ample puts out 75 rms and these are only 60 I think. Iv had them for over a month and run them at the highest volume (without clipping) I can and I've had no proplems even at 75 watts. If your looking for a 5.25 component without paying alot these are for you. But hey, they are Rockford so what do you expect haha.

Good deal

Bought a pair of kickers and they came for free, doubted them at first but it really does help in muffling the rattles from the speakers.

Sound deadening

Makes the speakers sound great and looks good to plus doesn’t blind you.

By Christian on April 22, 2020 Verified purchase

NVX SDBSK2 Premium Stealth Black

Perfect fit an very fast shipping.Good list to choose from to fit my car.

GOOD QUALITY AND EASIER ON THE HANDS!!!!

I got this small pack to finish my daughter's 2020 Camry after I had already used the foil-backed version. It went on just as easily and stopped the license plate and gas gap door rattle. A big plus for me was it didn't cut my hands shreds as the foil did.

By Gerald on July 13, 2021 Verified purchase

Good quality sound deadener.

Not enough to cover an entire door but enough to add enough mass to make a difference. Peel and stick.

By Joseph on February 2, 2020 Verified purchase

Awesome product

Very clear sound. Very easy install. Rockford Fosgate has always been quality for me.

By Kevin on January 20, 2020 Verified purchase

Nvx sound mat

Added 6.5 jbl gto coaxial to my front doors very easy to use clean surface and stick very easy to cut any time you door speakers add nvx mat you definitely notice the difference in the sound of your speakers it's a must best money I spent if your upgrading your speakers might as well do it right

By Big pat on June 13, 2021 Verified purchase

Nice!!

Love Them If U want a little punch get them

Does the Job

Good price, fast shipping, works good. Greatly improved bass while also making the vehicle quieter.

By NICK on December 3, 2022 Verified purchase

Great upgrade

Ive added these speakers in a 79 c30 Chevy in the front kick panel. They sound great - I'm using retro sound head unit - Memphis 50 watt amp @ 4 ohms, Rockford 6x9 punch speakers in rear and memphip 300 watt@ 4 ohms mono amp driving a rockfford shallow 12 inch sub.

Would absolutely recommend these speakers -

By Anonymous on November 30, 2019 Verified purchase

Sound crisp AF

Fit great in my 2003 Dodge ram crew cab. Came in on time and in great condition. They sound good for their size. I would definitely purchase again for another vehicle if I needed to, Don't sleep on these component speakers.

By Fernando on August 11, 2017 Verified purchase

Best stuff on the market

For the price this is the best stuff by far out there A+++++

By serento on July 6, 2025 Verified purchase

Free Free Free

Who does that anymore? Free product great service free shipping that’s why sonic’s electronics is growing and other companies are not.

By KELLY on February 27, 2025 Verified purchase

Works great! Flexible and thick!

Works great seals up all the gaps!

By erik on December 21, 2024 Verified purchase

Nice product

Love that I got it for discount with speaker purchase. Works like a champ!

By Craig on October 18, 2025 Verified purchase

Makes sense Works perfect

I put a square behind ea. door speaker and a square on the inside of each pod and it made a solid difference, especially for the pods. The music sounds better, no hint of an echo or slight vibration that I'd get before insulating with NVX SD. Pods/speaker boxes should really come insulated from the factory. Install some squares behind your speakers and you'll hear the difference.

By Ron on June 12, 2026 Verified purchase