Customer Ratings & Reviews

nvx 4

installed these in a 90 Chevy regular cab. For the price they sound great
but the highs are a little bright for my taste.

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.

dose what it supposed yo do

Pretty loud for four inch components. I would recommend them to any one

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

Great budget coaxial

Replaced a couple of old factory Monsoon/Delco 4" rear speakers in a 2002 Camaro. These speakers were a much needed upgrade over the full range 15 year old factory speakers. Soldiered the connector off the factory speaker on and dropped it right in. Powered by the factory Monsoon amp, sounds great for the sale price of $35. Even though the factory speaker was a 2ohm and this is a 4ohm, there was no loss in output, these must be much more efficient.

Great cheaper speaker

I have these running against a stock Kenwood head unit. They complement my NVX amped, Digital Design VO series 6x9 door speakers. The VSP4 speakers are dash-mounted and sound excellent.

Wow! These speakers sound amazing

I had never heard of this brand of speakers before. The reviews are very good, so with the price being so reasonable and all of the positive reviews and my 1990 Mercedes 300E desperately needing new dash speakers, I decided to try them out. I am used to purchasing high end speakers for my cars. Over the years, I have purchased Polk Audio, Acoustic Research, JBL, Kenwood and other well-known brands. They cost more in most cases and way more in some. These NVX brand speakers sound just as good for less money. The build quality is impressive for the price. They are so clear and clean sounding with the aftermarket JVC head unit in my old Mercedes. They sound so good; I'll need to change the speakers on the back deck to get that clear and clean sound throughout the whole car. I will definitely be purchasing NVX speakers to put back there.

By Infiniti68 on November 20, 2022 Verified purchase

NVX VSP4

Great speaker, Installation was easy, Sound is great.
The speakers are well built, looks Quality.

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.

NVX VSP4

Great build quality excellent sound well worth the money, looking to buy the NVX 6.5” door speakers now

By george on July 19, 2020 Verified purchase

Best Quality and Affordable price

I order this items it fit my vehicle perfectly . I love it . It's very affordable.
Thanks Sonics.

Best Quality and Affordable price

I order this items it fit my vehicle perfectly . I love it . It's very affordable.
Thanks Sonics.

fast flash trying to out run super man fast.

Haven't got it yet but ordered something from a different web sight and it will be here end of this month or next month not car related. and this will be here Friday... ill bet Thursday from past orders love this place

By Alex on August 2, 2016 Verified purchase

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

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

Awesome replacement

I've always been a Kicker fan, but this NVXs caught my eye and so far I'm very happy. Sound is clear, easy to work with, had to modify a little but didn't mean nothing. Too soon to determine durability, but I'm sure they will last. If you need more convincing, they are awesome for the price and size.

Great Midrange / Tweeters

Using in the dash of my 4runner and can not say enough about how impressed I am with the sound quality and output. Have Alpine Type-Rs in the front doors and with 100 watts a channel these just are perfect, what a value.

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