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

Value

Best speakers I have ever bought I had Jensen and boss in the past this product is the best

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

Great sound

I was pleasantly surprised when I hooked these up on the rear baffle in my 67 T Bird. I had a pair of 6x8 NVX I custom installed already and the stock speaker holes are 5 1/4 so I decided to match them up. They are sharing the rear channel of an Alpine 100x4 amp so at 2 ohms each speaker gets 75 watts rms of clean alpine power. and boy they sound rich and detailed, it was surprising for a speaker of this price.

By Christopher on November 8, 2023 Verified purchase

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 speakers

Good speakers for the price work good and sound amazing, I would definetly recommend these to anyone

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

Good value

Great they are loud and clear. Can't go wrong with these

Amazing sound!

I cannot believe the sound these put out for how little they cost! I've slowly been testing out NVX products and I've been impressed with everything I've come across so far. Hook these up to an amp and they really come to life.

By Jensen on May 29, 2020 Verified purchase

Needed some mods, happy now!

Well, these speakers had a harsh upper mid-range. I suspect this is from the 5.25 in cone breakup in the 4500+Hz range. I experimented with a simple low pass filter (coil, about 0.25 mH), which was certainly not optimal, but helped begin the roll-off in the 2500-3000 range; I tested the mod side by side, modifying one speaker at a time. Now I'm pleased with their sound clarity. Obviously why component speakers outperform the simple coaxial containing just a capacitor on the tweeter. Overall I'm impressed with NVX products. With a good quality CD these are pretty sweet sounding from a upgraded head unit, no amp. except on the sub.

Good build quality and sound

I was pleasantly surprised at how well these sound, great midbass and crisp highs. I also sound deadened the crap out of my doors and that made them even better.

By Adam on May 5, 2018 Verified purchase

Impressive

When I read the rms wattage for these speakers I was not ecpecting much as far as performance. Boy was that misleading but in good way. At first I connected them to my head unit and they sd ounded ok. Then I hooked them to my amp giving them 100 watts rms and WOW what a suprise. The clarity and volume and mid bass and highs were amazing. I could not beleive what I was hearing coming from these speakers that were so inexpensive. It blew my mind just how good the sound quality was and how loud they truly reached. These speakers are the most underrated speakers I have ever purchased and in my 59 years of existance thats a bunch a punch. I installed them in the rear quarter panels of my 2004 silverado single cab where the OEM were 4"x6" speakers. Just cut the opening a little bigger with some tin snips and they were good to go. I wasn't even going to replace the oem speakers because most people had stated that it would not be worth it. THEY WERE WRONG it made a world of difference. My system consist of 3-10" subwoofers 2 alpine type R's and 1 NVX104 and in the doors alpine spr 60c. A Hifonics BRX1600.1D amp and a Rockville RXM-F4 rated @ 100 watts rms@ 4ohms both amps are CEA2006 Certifide and my system rocks.

By Randy on February 20, 2017 Verified purchase

Unexpected surprise

I was hesitant to buy these speakers. I saw that they are rated @ 40 watts rms each. I did not think they could handle much more than that. Well I was wrong. I put 100 watts on these speakers and they really shined. Surprised the hell out of me. I installed them in the rear quarter panels in my 2004 single cab silverado. I had to cut the opening bigger with a pair of tin snips but it was very easy to do and I am so glad I did. There was no way I was going to install a pair of 4x6s like was there. These 5 1/4" NVX speakers are really exceptional. They are worth three times the cost. I would recomend these to anyone. What a great deal.

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 VSP525

Great replacement speakers. Solid product for the money. Did much research and these NVX speakers were top of many list for best bang for the buck. Just buy, you won’t regret!!

Bought the wrong size

Got these speakers but then realized I need 6.5, but they still worked so we created a mount for them and they sound great

By JeVaughn on March 16, 2021 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

narrow tweeter dispersion

great speakers just the tweeter doesn't cover a wide area, very directional. but perfect for what i bought them for. i am using 8 of them on a 5.1 system plus an 8 inch sub woofer and they sound great. if these were in some door panels down lower i would bet the tweeter would need some tuning. the woven tinsel leads surprised me though, iv only seen that on sub woofers before i got these

By Kevin on January 15, 2018 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

Excellent for the $37.00 pair...

Soft domes tweeters, rubber surrounds, excellent value, Quality product, would purchase more NVX products.

Major improvements in the V series

First you notice the intensely heavy magnet and the build quality. Next once installed, they produce. I give up on the other mfg’s Wimpy ass speakers and am stoked to be using these! I first discovered NVX as a sub mfg’r when I replaced a blown sub in my outbuilding by overdriving it. The NVX sub was wonderful, as are the V Series!

By Anonymous on August 11, 2019 Verified purchase

V-series Rock!

NVX has been making my vehicles SCREAM since 2012! I have had every size V-series coaxials at some point! They sound good on deck power and way better amped! I keep stock HU's so an NVX XFLOC added in with NVX wires, RCA's and a your favorite NVX amp... You Can Not Go Wrong!! NVX... Second to None!

By Anonymous on September 5, 2018 Verified purchase

NVX VSP525

Very good product! I recommend!
I will definitely be back for other purchases.

By TBGS on April 17, 2023 Verified purchase

Great Buy!

Definitely would recommend! Great sound, very easy to install & at a very good price.

By Jeffrey on February 16, 2020 Verified purchase

NVX VSP525

Well made product, performs better than expected. Nvx will now be my go to product for factory upgrades.

NVX VSP525

Excellent speakers for the price. Very clear and crisp. Should’ve gotten em long time ago!!

Better than I expected!!

I bought a set of NVX's for my front door speakers, and have been very pleased! And Decided to buy a second set, but different model of NVX's for my rear speakers! Have been very pleased with the performance!

By L.C on January 21, 2017 Verified purchase

05 civic install

NVX is always a great company to work with they have high quality products and they over performs good prices highly recommended

By Pedro on July 4, 2023 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

Front speaker on jeep tj

Running these in my front of my jeep tj. Clear and clean running them from nvx6004 amp. This is my first nvx speakers and I'm really happy with them.

By Charlie on August 13, 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

NVX an absolute banger for price

Put these speakers in a buddies of mine 1997 gmc sonoma and the sound quality is top notch. He couldn't believe how much clearer the music sounded and how much tighter the midbass was compared to his factory speakers!

By Carson on April 12, 2026 Verified purchase