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.

impressive little speaker

this speaker is smaller than I thought but after hearing them WOW you would think they were 4x6s fit perfect in my Silverado highly recommend.

Name says it all... Rockford Forsgate

Best sounding speakers I have ever owned. Louder and way clearer than all of my friends.

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 FOR SMALL SPEAKER

These speakers I installed on my 00 silverado back doors they are loud and clear, they are getting 50 watts rms from my head unit. They are worth the money. Rockford Fosgate Power series speakers are the best. Sonic electronix has the best prices and very fast shipping got them in 2 days.

Awsome speakers

I put these speakers in the dash of my jeep and they are unbelievable I should have done this a long time ago.

Nice Speaker but.....

They are a very nice looking speaker (never got to hear them) but unfortunately like stated in another review these wont fit my 2001 S10 and most likely wont fit 98-2003 S10's in general. Normally you have to trim some of the plastic on the back side of the speaker grill when installing any type of after market speaker so that the grill will fit flush w/ the dash, but there is no amount of trimming you can do to get these to fit. The main reason is that the tweeter is too tall above the speaker and it wont allow the speaker grill to sit flush w/ the dash.

AMAZING SPEAKERS !!!

I would 100% recommend these speakers. I've had them for over a year now and they are showing no signs of going bad. I play them in my truck with the volume up all the time and there is no distortion at all. If your looking for a speaker that is very duriable and will last you a long time this is for you.

Awesome Speakers

Great Speakers with great sound. love 'em! Next vehicle i owe will have them!

Rockford All the way

I just receive my package a couple of hours ago. These 4x6 are amazing, they sound so loud. POWER SERIES on Rockford All the way. There the best that money can buy. Don't cheap out. Get brand name or nothing. Thanks again Sonic you guys are awesome definitely recommend this website to everyone.

Great sound

These things sound great! Ran them for just a little while in my truck! Mid-bass is great for such a small speaker, and the highs are very LOUD and crisp. Only bad thing is they will not fit in an s10... the holes dont line up, and they are too tall (hits the a/c ducting and the tweeter hits the speaker grill causing it to crack)

Rockford Fosgate Power T1462

So far so good the speakers came with a bracket that you use in case if you need to modify your speaker space, in my case i do not im taking the stock speaker cable out and putting in 12 gauge Monster speaker cable hopefully it'l sound good. When I get enough money i will hook up an amp with them and really bring their sound out!
Pros: Sleek Design, Huge Magnet, Excellent Sound Quality Cons: Smaller Than My Hand!, Rubber Surrounding Looks Weak! Tweeter Design is so Protruded.

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

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

good value

I installed these on my dash, on my 2002 Sonoma (with minimal modification). These are a tremendous upgrade over stock, and are extremely loud at 50watts rms (thats what their have from my amplifier).

I would recommend these, even with the included components.

for a 4x6 this speaker is tremendously larger than most, with both mounting and speaker depths. Make sure you measure what they're going into, and as far as these when compared to infinity kappa's (or other 4" speaker plates); these do the job great, and are also 4ohms.

Too big

Sound great, would definitely recommend these to anybody with enough room to install them... The combination of the huge magnet and the tweeter sticking up so far make them difficult to install... DO NOT fit in the dash of 88-95, maybe even the 96-98 models, otherwise great speaker.

great speakers

these speakers are fantastic! the sound and clarity is awesome. the sound is crystal clear. I would recommend these speakers.

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

Fosgate 4x6 I put in my 01 HD excab

Sound amazing over the factory speakers. I still only have the stock radio, but man it sounds so awesome!!!! I already knew what to expect because I had the 6.5 in my last truck. But they are great! Worth the extra money. I treat my car audio like dirt when I first get them so I know they will last. These were no exception.

My only complain is that with paying so much for these I wish they come with speaker wire leads, it's just expected.

With Rockford u can't go wrong

I def. recommend this product or anything made by Rockford Fosgate for the matter. I have used their products for many years and am a very satisfied customer, sure it may cost more than other speaker brands but you get what you pay for! A quality product built to last, and sound absolutely phenomenal!!!

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