Customer Ratings & Reviews

Amazing set of speakers! Super thrilled

I am really glad that I went by materials and specifications when I decided to go with these because I couldn't find any reviews. I compared these up against Focal and Infinity Kappa sets and they stacked up nicely with the cone and tweeters, power and efficiency. I am left with my jaw-dropped and cannot wait to try a few other products from NVX now. I'll try to upload pics this weekend.

By Craig W on April 1, 2022 Verified purchase

Blew me away!

I have listened to some of the songs of my life for 30+ years from the likes of CCR, Joni Mitchell, Fleetwood and Springsteen and these speakers have set a new benchmark for me. The clarity is unmatched and I have enjoyed the likes of Focal, Kappas, and old school MB Quart and these speakers really gave me a new found appreciation for car speakers and the value play. No disrespect to NVX, but I figured I was buying nice "parts" (tweeter had nice specs, good power handling, blah blah) so I figured it was a good value. The overall final product though is ridiculous. The balance, tonality and clarity seriously are amazing. Thank you!

Great speakers

These speakers are amazing at this price point. I put it on a 2009 Toyota Venza on a stock radio non JBL and it sounds great. Good highs and great bass. Can't wait to install my double din pioneer radio to get more out of them. Of course on the stock radio volume is not as high, but they do sound great for what it is right now. Reliable. Can't say yet, just installed them, so day one. But I'm sure they will last a long time.

By Joel on June 12, 2022 Verified purchase

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.

Fantastic , but Fitment issues

Have these installed on the rear doors of my f150.

I have them paired to a set of the NVX XSP652 in the front doors and am pushing them with an NVX XAD41 amp getting signal from my Sony XAV-AX6000 head unit off the 5v RCA pre amp outputs.

These match perfectly to the XSP65KIT in the front to the point where, if I didn’t have a factory tweeter location on the A-pillars.

These play very loud and very clear provided you are doing what you can to keep noise down(low gain settings, aftermarket radio with high voltage preamps, keeping head unit volume below 80% and amp gain lowish). I’m pushing probably 50-60 watts to them with my current gain settings and they play perfectly clean to the point you don’t realize how loud they are until your ears start hurting.

The tweeters were pretty well balanced, but I turned down the top frequencies in my head unit eq two clicks to be less harsh at higher volumes(personal taste).

These have excellent bass for 6.5 inch speakers but are still 6.5 inch speakers.I installed 50mil sound deadening to the inside door skin and the to the outside behind my door panels to about 80 percent coverage and sealed all hole on door panels, then installed NVX XBAF65 baffles to seal so it’s not that.

I wish they made the 6x9 version of these in a component set, but alas they don’t. But I would recommend you look into the 6x9 if you or your installer feels comfortable modifying the doors if needed.They are adequate for most music by themselves but I still recommend getting a subwoofer to fill in that lower range.

I have my HPF on my head unit set to 50hz with a -36db slope and my amps set to full bypassing it’s hpf/lpf and that seems like a good place to start tuning with these. I didn’t feel like I lost any bass but did see a volume increase from them not wasting energy trying to play those frequencies you have different ears than me so YMMV

Be aware that these do not include any mounting screws and will not fit any standard 5x7/6x8 to 6.5 inch adapter bracket, they have an over sized basket and the mounting holes for the speakers will not line up with those adapter plates and the speaker stops 2 inches shy of flush because the center hole is not big enough, these baskets are too large to alter the brackets. I had to fab my own with some cheap plastic cutting boards, drill bits, and a oscillating multi tool.

By Frank R on July 7, 2023 Verified purchase

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

NVX 6.5

This is the third pair of these Nvx x-series 6.5 that I have purchased from here they are a great set of of speakers crisp sound and easy install and for a great price you can’t beat them. Highly recommended to someone with a loud subwoofer(s)

By Pedro on July 1, 2023 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

These coaxials sound very good and the price was very nice, however installation was a little complicated because the basket at its widest point was a little too big to fit the opening of my particular back doors. I had to make trial and error spacers that in the end kid of fit. Other than that it sounds great, so far very durable and keeps up with my Blaupunkt's of the same size in the front doors. Overall, I would recommend these 6.5's any day of the week.

By Armando on March 28, 2023 Verified purchase

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 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

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

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

Absolutely Pleased

As a repeat customer, I am absolutely pleased. Shipping was swift and the shipping packaging is awesome. The speakers are completely insulated and covered nicely. Sonic Electronix rocks!!!

By JaCee on April 12, 2025 Verified purchase

Crystal clear sound

These speakers sound amazing. Super clear and loud. Vehicle sounds like a concert inside now

By Joshua on February 16, 2026 Verified purchase

Awesome Speakers will be installing these in my mustang S550

By Darryl on June 11, 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

Looks fantastic and sounds excellent.

Can’t ever go wrong with an NVX product. Sounds excellent and great value.

By Panayiotis on May 28, 2026 Verified purchase