Customer Ratings & Reviews

mid bass slam

These speakers are absolutely phenomenal. Gave my system that rich depth and midbass slam. They look amazing as well. If you are looking for that missing piece of the puzzle that lies between a midrange and a sub, this is your answer. I was previously itching to put a sub in my system, but after installing these and feeling the bass in my chest, I could live without a sub, or at least wait a little longer.

bad to the bone

I just wanted to say that these speakers exceeded all my expectations. They are beautiful and powerful. They sound best when cranked up loud. I'm only feeding them 60 watts RMS and they shake my rearview mirror. Also, they play a full octave lower than advertised, responding to notes down to 40-50 hz.

Rockford Fosgate PPS4-8

This is a great product and I will be be purchasing from Sonic Electronix's again

loud midbass

I build a box in top of bass box my 3rd generation explorer has 3rd row seat n manage a box 2 12 woofers ported tune 26htz. the Rockford fosgate, gives loud mids n tweets, 4 in a box amplified at 400 rms my bass is 800 rms.its loud

awesome product

I ordered A Pair Of These About A Month Back And I Love Them. They Are A Real Clean And Powerful Midbass Driver That Makes A Perfect Match With The Rockford Ppt

These Speakers ROCK!

I have two of these fabbed in my front doors. I wanted more midbass and clear beautiful sound, and that's what I got! Very impressive and powerful midbass, these will play down to 30hertz enough for you to feel! I have each running on 100 watts rms from a RF Punch amp and they are plenty loud. Running them on All Pass from the amp and the sound is just phenomenal, and the midbass just hits you in the face! They look sexy and are built well. Audiophiles buy these now!

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

Amazing Mids

Very well built, and beefy. If your looking for mid bass drivers look no further. I have them in some enclosed kick panels and they sound amazing. Very punchy in my application. Rockford is making some great stuff.

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

Fantastic, but

these things sound fantastic, lots of mid bass, and they don't even need a tweeter. However, you have to power these things correctly, and break them in. They won't sound good right away, mine sounded very harsh until about 5 days of moderate use. After this they really "freed up" and produced a warmer, more natural sound.

Good product

Sticky and did hook well to the cars body . Got it for free with my speakers purchase. Sonic electronix for life

2013 Lexus ES350

Factory Stereo WITHOUT Mark Levinson; Factory Amplifier; AudioControl DM-810 Sound Processor; Alpine MRV Amplifiers; Dash Speakers 3.5" JL Audio C2-350x; Front Dr Speakers 6.5" Alpine R-S65.2; Front Dr tweeters Alpine SPR-10TW; Rear Dr Speakers Alpine R-S65C; Center Dash 4" Speaker Alpine S-S40; Subwoofer Rockford Fosgate Punch P300-12; and recently installed the Rockford Fosgate Punch Pro PPS4-8 Midrange speaker mounted in the rear deck replacing the factory 8" Sub.

Before I installed the Rockford Fosgate PPS4-8 midrange speaker my sound system lacked depths from about 1.5 kHz down to 200 Hz. After installing this single 8" midrange speaker (in a Mono configuration) it filled the gap, Crisp Clean Rich Bass. I have been experimenting with the AudioControl DM-810's crossover, phasing, and equalizer settings and found this speaker can handle 7.7 kHz down to 48 HZ. Listening to classic rock, hard rock, and jazz the drums (particularly the snare drums), piano, electric/ acoustic guitars, and vocals now have depth. This speaker is rated at 4 ohms but acts more like a 3-ohm speaker, needs less power to drive it. If your sound system sounds too tingy I highly recommend this speaker to fill that void. Also, it can act as a High range sub if mounting space is a factor.

By Tom on February 24, 2020 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 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 product

Put this speaker in place of blown factory sub and it is loud highly recommend

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

Great value

Excellent product it sounds amazing in my car and I received it very quickly.

By Jared on April 29, 2020 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

great speakers

Rockford Fosgate Punch pro pps4-8 they rock ! they are super loud would buy another pair!

By Anonymous on September 16, 2018 Verified purchase

really a great buy

My neighbor recommended sonic electronics and I ordered these 4 speakers to replace my 17year old original ford speakers
I really like them and the sound is just fantastic

By Michelle on February 10, 2020 Verified purchase

this is the best choice i ever made

the bass is amaizing,so loud without distortion,can really handle the power,i can still feel the vibration even tho I already sound deading the whole car,its the best for mids

By Anonymous on May 6, 2019 Verified purchase

Loud

Loud and clear just like their little brother the 6.5s. I want more someday. Only con is the small opening for speaker wire, it's not always lined up

By Jay on March 29, 2024 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

Haven't had time to hook it up. Love the look. Its a nice product. I been a rockford fosgate fan for years.

By Christopher on May 21, 2026 Verified purchase

They are heard super loud and clear

By Alan on February 12, 2025 Verified purchase