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.

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 for the price, but might not actually "fit".

Purchased these to go into a 1984 Toyota Pick Prerunner. Original factory speakers, aside from being 28 years old, are junk. Quick Fit guide said that these would fit the truck. I started installing car stereos for my brothers and his friends when I was 13, so I've been a Fosgate Fan for the past 20 years (yes, I'm that old). I was excited to find a good deal on a set of 4" Punch 2-way speakers.

When the speakers came in, I pulled one out of the box and compared it to the factory speakers. There was an evident size discrepancy. The Fosgates were quite a big bigger than the factory speakers. Right then I knew this was not going to be an easy swap.

Now, I'm sure many of you don't know what the factory mounting spaced for an '84 Toyota 2wd Pickup look like, but they're directly below the air vents in a long, hallway like space. After a quick test fit, I was assured these speakers DID NOT fit. If you look at the pics, you'll see t hat there are four elongated mounting spots at the top, bottom and each side of the speaker. All of these had to be removed. I then had to dremel quite a bit of plastic out of each side of the "hallway" the speakers mounted in. I don't have a cordless dremel so it made it very interesting. Once all of that was done, I was able to finagle the speakers into up against the area they were to be mounted. The speakers did come with 8 screws and a hex bit to drive them with. These came in handy and I used two on each speaker. One in the factory mounting area and one in a new spot so the coarse threads of the screws would grab the plastic. Ones it was all said and done, the speakers sounded great.

The speakers offer rich mids and amazing highs. If you're getting these to add some "bump and thump" you're doing it wrong. That's what Subs are for. The sound quality is excellent, even from the crappy head unit.

TL/ DR: Even when you're told the speakers will fit, they may not so be prepared to do some creative installing or get someone who knows what they're doing to install them.

Sound quality is amazing and I'm very happy with the speakers. They're a great compliment to any system!

Great Product

I have a 96 Mustang GT with worn out speakers. I wanted something that sounded very clear and powerful. I wanted something that compared to a new cars high end audio system. The speakers did that and more. They are clean and crisp, but aren't too much. The would sound great with subs, but doesn't need them. They have enough bass as it is.

Best 4 inch speakers!

These speakers sounded so clear, with no amp! I'd highly reccomend these speakers. You can never go wrong with rockford fosgate!

Replaced JL Audio 3.5" for Dash.

I got these to replace 3.5" JL Audio that could not handle the power of my amplifier, and sounded to "tinny". These have a much fuller sound for front staging fill.

I had to significantly modify my dash to install them, but I knew this going into it.

System consists of:

Pioneer X940BT > Audio Control EpiCenter > Audio Control EQL > Audio Control 2XS > Audio Control Matrix Plus and Kicker IX1000.1 for subs, and Kicker IX500.4 for mids and highs.

The mids and highs are Rockford T2 6.5" Components for doors and rear deck, sub is a Kicker 12" Solobaric L7.

Great for the price, but might not actually "fit".

Purchased these to go into a 1984 Toyota Pick Prerunner. Original factory speakers, aside from being 28 years old, are junk. Quick Fit guide said that these would fit the truck. I started installing car stereos for my brothers and his friends when I was 13, so I've been a Fosgate Fan for the past 20 years (yes, I'm that old). I was excited to find a good deal on a set of 4" Punch 2-way speakers.

When the speakers came in, I pulled one out of the box and compared it to the factory speakers. There was an evident size discrepancy. The Fosgates were quite a big bigger than the factory speakers. Right then I knew this was not going to be an easy swap.

Now, I'm sure many of you don't know what the factory mounting spaced for an '84 Toyota 2wd Pickup look like, but they're directly below the air vents in a long, hallway like space. After a quick test fit, I was assured these speakers DID NOT fit. If you look at the pics, you'll see t hat there are four elongated mounting spots at the top, bottom and each side of the speaker. All of these had to be removed. I then had to dremel quite a bit of plastic out of each side of the "hallway" the speakers mounted in. I don't have a cordless dremel so it made it very interesting. Once all of that was done, I was able to finagle the speakers into up against the area they were to be mounted. The speakers did come with 8 screws and a hex bit to drive them with. These came in handy and I used two on each speaker. One in the factory mounting area and one in a new spot so the coarse threads of the screws would grab the plastic. Ones it was all said and done, the speakers sounded great.

The speakers offer rich mids and amazing highs. If you're getting these to add some "bump and thump" you're doing it wrong. That's what Subs are for. The sound quality is excellent, even from the crappy head unit.

TL/ DR: Even when you're told the speakers will fit, they may not so be prepared to do some creative installing or get someone who knows what they're doing to install them.

Sound quality is amazing and I'm very happy with the speakers. They're a great compliment to any system!

^ noob

I put a set of these into my friend's truck to replace his blown factory speakers, and they sound great for what they are.

The idiot who said they had no bass is absolutely correct, these speakers have small cone area, small excursion, and don't take a lot of power. That's all perfectly natural, seeing as these are door speakers, not sub woofers. You should probably keep your ignorance to yourself next time.

Hmmm

Very difficult to install correctly, item does not include grilles. Rockford Fosgate does not make grilles for these speakers. Have found some that will work, with extensive modification and custom fabrication. What a big hassle, hope the sound is worth it.....

Excellent sound

Used these in custom A-Pillars they made the front stage sound phenomal. if your looking for a clear crisp speaker rockford is the way to go.

Could be better.

These speakers have absolutely no bass, the only bass you get is very "Tinny" and has no impact.

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.

Just average

I would say the speakers are good for a old cracked factory speaker replacement but nothing special. The flex fit fitment is way to bulky to be a positive. I had to return one set of these because they were too bulky to even trim and fit. But if you have ample room and just want to replace blow speakers. Not a bad choice at a decent price.

By Ryan on November 16, 2017 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

Best 4 in. Speaker so for your buck.

I would recommend this product for any 4 inch replacement. I replaced driver door and front dash speakers in my 745 li. Definitely better than my factory.

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