Customer Ratings & Reviews

Impressive

I had to replace my cheap, blown out dash speakers in my 88 Toyota pickup. Impressed with the highs and the lows. Had them tweeked with the pioneer head unit until my ears started to feel uncomfortable at times. Really clear sound with these loud little bangers.

More Greatness!!

I replaced my P132's with these and am overjoyed with my purchase! They're cleaner, louder and have a surprising amount of bass! The install was a breeze thanks to my NVX Sound Deadener! Sealed so lovely! My dash is happy now and my volume knob is excited to be able to be turned further than before!! LOL! NVX... Second to None!

Great performance

Great amp, I love the size that it comes in so it fits easy almost anywhere. I love the two terminal feature. As long as you have it wired correctly, it barley heats up. Another positive is the connector it comes for lower gauge wire

Best 4 inch 4 ohm Speakers I've heard!

These speakers have the best bass I've heard out of 4 inch speakers!!!

Nvx

The sound is greatthe quality is good and the price excellent!!

Seriously clear and loud

NVX is my new brand of choice. I recommend these to people looking for An amazing musical experience. I've ran them off a factory radio, Kenwood decks and amplified them with h 50 W RMS and they impressed me with every setup. For the price NVX is untouchable.

By david on April 30, 2015 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.

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.

NVX NSP4

These have so far been great speakers, although I didn't install them to perform as well as they would otherwise. If I remember right; the specs on these for freq. response and power handling were the best in this size and at this price point. Very satisfied.

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

Budget price, remarkable quality

I purchased these 4" NVX coaxials to replace a pair of worn and rotting 14 year old Rockford Fosgates.

My first impression is that these are phenomenal little speakers. After about a week of breaking them in, the sound is smooth, balanced and detailed; just ever so slightly on the warm side of neutral. Their reproduction feels effortless by comparison to the Rockfords they replaced.

The highs are pleasant and rich without being overwhelming; very natural and present.

The mids are about as much as you could ask for, matching the highs well in both timbre and volume. The detail and neutrality carries through with vocals and instruments alike.

As for bass, there's not much to speak of. I'd call it "better than most" in the 4" class, but don't expect miracles. I have them running on a high-pass filter off the head unit @ 80hz. I've found they have a bit more presence crossed over @ 63hz, but they lose detail as a result.

This review is based on the unit as-shipped and unmodified, but if you're into modding, replace the electrolytic capacitors with a high-quality metalized polypropylene unit. I adjusted the crossover frequency on mine using a 6.8uF cap (the factory unit is a 3.3uF electrolytic), and the difference is phenomenal!

Speakers are installed in the dash of a 1997 Volkswagen Passat, running off a Pioneer head unit, which provides an 80hz digital high-pass crossover. EQ is was flat, with loudness and Sound Retriever disabled.

By Rob on August 18, 2016 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.

Excellent speakers for the price

Good sound quality. Installed both speakers in my 1993 Toyota Tercel in less than an hour. They replace one blown speaker and another one that had a fault base. The old spacers were dry rotted.

Good speakers

Overall, pretty good little speakers. Well made and I expect that they will last. Happy with my 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

Size can be Deceiving

Go for it don't worry about the size you will be surprised. Amazing tiny speaker for a brand I never heard.?

First time buying NVX and was amazed

this was my first purchase of an nvx speaker but definitely not my last. these went into a customers work truck off a kenwood deck kdc-x300 and they sounded amazing i could not believe it. they were paired with a set of nxp 6.5s and they all sounded wonderful off the decks power. mind you these decks have steller eq and crossover capabilities so they really got these speakers sounded good. can only imagine amping them. overall great purchase especially for the 25 dollar price tag

By TJ on July 14, 2017 Verified purchase

Great Speakers!

Very Pleased will sound. Amazing value. The silk tweeter really shines. I have had JL C2 3.5" Speakers that cost over a hundred dollars and I think these sound better.

By Scott on January 10, 2020 Verified purchase

Quick Service

Great set of speakers at the best price out there. Fast delivery. I couldn't be any happier. Thank you Sonic!

Wonderful speakers

If you looking for some great high watt 4 inch speakers. Buy this right now don't hesitate very nice bass, mids and highs.

By gerald on March 20, 2016 Verified purchase

Far better than the price suggests!

These speakers wont win any spl comp but for 25$ they are far better than any sony, pioneer, or kicker speaker! I no longer buy any alpine products after purchasing swr10-d4 subwoofers but these are just as good as the S series 4 in speakers

By Anonymous on March 31, 2019 Verified purchase

NVX NSP4

I had been researching these speakers for a bit, I just had no where to put a pair. My daughter just turned 16 and I bought her a Mercedes 450sl ( classic) bam so I put em in there these speakers are nice and pretty cheap to. I would by again they cover a nice range and how!

The final touch

Coupled with a classic Pioneer analog radio/cassette player in my classic 1990 Toyota Sunrader RV, the wonderful sound of the speakers provided the final touch.

Wow!

These have amazing sound reproduction. I have these running off my head unit with the hpf set to 125hz (i have a subwoofer that takes care of the lows )and these things sound amazing. These speakers have amazing mids and highs. And at the price they have them with free shipping plus free speaker wire, simply amazing.

By Chris on March 25, 2016 Verified purchase

Good service & good products - nice speakers

Items arrived very fast & very well packaged. Nice site easy to navigate. Speaker sound good. I used them to replace JBL's in 5.1 surround. system in speaker boxes. Sounds very good. Would recommend over Crutchfield for prices!

Very impressed

Was blown away at the performance of the speakers..would definitely buy again

By k-dub on April 22, 2016 Verified purchase

Outstanding sound

These speakers sound amazing for there size..
Running off stock deck in my Chevy Spark.
Buy Em you will be impressed..

Way better than I expected

These are really good speakers. They sound great! I’m very surprised and happy with these little guys. I have them in a little BMW M Roadster behind each seat, and I haven’t heard them distort or sound harsh at all. I was thinking these would be a significant compromise compared to the high end speakers I typically use, but I’m very pleased. They are high quality speakers. Made well. Sound great. Handles lots of power without problems. Get some!

By Dennis on June 11, 2023 Verified purchase

Excellent Replacement Speakers for my BMW 7 series.

These speakers worked sensationally in the Bimmer. Better than the Bavsound!

By Whitfield S. on October 11, 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