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.

good value

you dont see mid road priced speakers in this size that actually sound almost audio file grade.

Great value

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

unbelieveable

I saw these exact speakers 2 weeks ago at 179.99 at the local car audio shop. biggest 6x9 ive ever seen. its unbelievable the size of these things.

Good Bass...

The bass this speakers produce is clean and deep. Had some difficulty installing on a 98 Accord coupe, the magnet was too big had to modify the trunk bars that hold trunk door open.

Great Speakers

These speakers sound amazing. I have matching T152 up front and the T1692 in the rear deck in my 95 BMW M3. They put out some tight mid bass, sounds like if I had a small sub in the trunk. I'm powering them with R300X4 amp.
Buy them, you won't be disappointed.

Great Product

I bought these for my 99 Accord and they sound AMAZING I bought them from Sonic right before Christmas, probably the best speaker I have ever owned and I have had Kenwood, Alpine, Kicker and Infinity and the only ones that get close to being comparable to the RFS is the Infinities.

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

Loud

I was a little bit skeptical about these,, but when I got them and opened up the box !! Wow they were huge , I mean very beefy,, unlike the cheepo crap that some discount chains sell ....
Installed them , and wow !!! they are hooked up to a RF 500 watt 4 ch amp and its like having a mini sub box in the rear......

good stuff, good price

these truly Rock...good price for a perfectly new, in box, quickly shipped transaction. I'll look here for all other audio needs first.

Great speakers

These are some good speakers and sound good. It thumps pretty good for the price and they're good quality as well.

These Speaks ROCK!!

SO I put these 6x9s in my Chrysler Sebring rear deck. They are running with a pair of RF 6.5 in the front and a 15" RF sub in the trunk spare tire custom box. This setup rocks!! Clear sound all the way up. I got an RF 400.4 - 4 channel on the front & rears and a 400.2 on the sub. Car kicks some serious sounds! Love these guys!! I definitely recommend them!!!

Great quality sound

These sound amazing I instaled them in my cousions car and sound awesome.

6x9

One of my speakers gives off an occasional popping sound since i got em.

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.

nice speakers

I bought these for my 1995 olds cutlass ciera sl and they were huge and i couldnt mount them in the dash so i put them in boxes and they sound nice. I dont have them on an amp yet but i will in the future.

Great all around sound.

Have performed flawlessly.

Great speakers

Installed these a couple weeks back & they jam! I have a 400w alpine amp pushing them along with my door speakers. I'm surprised how nice they sound, clear highs with good mid bass. I'm pretty sure they'll sound even better with a rockford fosgate amp pushing them. Highly recommend if you're looking to upgrade.

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

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

Great 6x9s

These speakers blew me away! The magnet is huge and these things look like they can take some power! I've had them hooked up in my car for a few months now and they sound great paired with T152's and T1D210's. I'd recommend these speakers for anyone who loves there music and especially clear.

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 service

the choice to purchase these for my truck was the site said they would fit when I put in my information got the speakers here and they do not fit. I place no blame on any body there is alot of cars and trucks out there, the place where this company shines is they take care of there customers when I called to explain what happened Kaci took care of me in a flash and made sure that I was taken care of.
Thank You

By Lester on August 11, 2020 Verified purchase

loud and clean

large magnet and spider, so they do need the recommended 100 watts of rms power to get full potential but they sound great

By Wayne on April 25, 2020 Verified purchase

Only Rockford Fosgate for me

You can’t ever go wrong with Rockford Fosgate. In my Silverado 2500HD I’m running Fosgate Power series 6x9’s in front and 6.5’s in rear doors powered by Fosgate 4 channel amp and under back seat 2 Slim Punch series 10’s with Fosgate Mono amp. And In my Silverado 1500 Z71 I’m running Punch series 6.5’s in front doors with Punch series Tweeters and in back door Punch series 5.25’s. And will soon add a Punch series 4 channel amp on them all to add the icing on the cake. Both trucks sound awesome.

By BamaLegend on October 22, 2020 Verified purchase

Very good

Went with these and Fosgate 400x4 sounds really nice...I chose very well

By Doc on June 18, 2021 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

Good look and dorable,these are tooo loud.

These 6x9 are gorgeous and work even better, they flex right with my three 12 Inc woofers in my trunk. The sound come from these are out of sight they are very much worth the money they ask for them and they come in 2s. Good job Rockford Fosgate and Sonic Audio..

By Gary on April 11, 2024 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