NVX VADM4 Version 2 (VADM4v2) - Customer Ratings & Reviews

Powerful little monster

Purchased this amp on a whim. I tried looking for more reviews before dropping the coin, but couldn't find any on other sites. After receiving the amp and installing it, all I can say is my door speakers sound WAY better than being run off of deck power. I initially had a set of Kenwood KFC-P710PS components in the front, Kenwood Excelon KFC-X174 coax's in the rear running off of a Sony MEX-XB120BT. With the speakers now being powered by the NVX-VADM4 amp they are much more detailed and louder. I didn't think that such a small amp would be able to deliver enough power to make them sound as good as they do now. If you have a vehicle with confined space or just don't want a huge amp taking up room I would definitely recommend the NVX-VADM4. It's one badass product.

By Anonymous on March 24, 2019 Verified purchase

Great little amp.

I have purchased 3 of these amps and will continue to buy them for different applications on motorcycles. In the bridged mode, they provide the perfect amount of power to 6x9 speakers in lids. They have superior sound quality in either standard setup or bridged. No worries of overheating. Two of them will sit side by side in a Harley fairing and provide ample power to any 4-6 speaker setup providing 110+ db of clear sound that can be heard at ANY speed on a motorcycle. Nvx has done their homework on this little amp.

By Anonymous on June 19, 2019 Verified purchase

Amazing

Small, powerful, and very easy to install.. just want I needed..

Great Experience

This a great product. I bought this for my 2016 Roadglide. It's surprising how powerful this amp is. The sound is crisp and clear. Travis was a great help with choosing the right amp.

Perfect for classic cars

Loud cars need loud stereos, and this little gem gets the job done. I have this in my 1972 Duster mounted on the firewall running a pair of JBL Stadium GTO930s and a pair of Cerwin Vega H746s, and it sounds amazing. It's small enough to hide just about anywhere and packs plenty of power. I highly recomend this to anyone with classic cars who wants to keep their system hidden.

GREAT AMP

Have ordered this amp for several Motorcycle setups. Runs cool and plenty of clean power. Also small enough to fit into the fairing.

By Anonymous on September 11, 2019 Verified purchase

Snap NVX Done It Again

Had the mvpa4 upon release. Perfect size for my bike. Finally went to upgrade speakers and everything. Upon opening the box for the amp it fell right into a puddle from my lap. Upon looking I found theyre now marine rated! Also very minimal Scratching! New power availabilty is going to power everything nicely!

Excellent amp

The size is tiny, power is amazing i'm powering a JL W0 10 and JL components , the gain isn't even up. Nice space saver and it's just as big as my Iphone XR. It exceeds my expectations . Will buy again.

By Anonymous on August 8, 2019 Verified purchase

Awesome little amp!

Using this simply to allow running all 8 speaker locations in a 2012 4runner. Simple to set-up gets hot, but doesn't seem to be a problem.
I've got 6 nvx door speakers and a pair of pioneer 3" in the dash. 2ohm on all 4 channels still sounds great.

By CEO420 on May 12, 2020 Verified purchase

Decent for price

Decent amp for the price fortunately I paid way less for this amp RCA input plugs are cheap and wires pull out of plug and fray. The new waterproof amps look a lot better built if nvx would make better RCA inputs this amp would be a 5 star. amps installed on a 2015 H-D road glide..

Loved the sound just didn't last

When I unboxed the VADM4 it was very small but felt way heavier than it looked and I noticed the flimsy little plastic connecters on the rca input wire harnesses so when I mounted it to my amp rack I made sure that they were completely secured so as not to be able to move at all. I had it running two sets of tweeters and was amazed at the power and sound the little thing put out. I had it for about 1 1/2 years and all of a sudden I was getting engine noise through tweeters. I did normal troubleshooting loose ground etc. Then I touched rca harness and it stopped so I thought it might have vibrated out(amp rack is not connected to sub box) I took off driving and got 2 blocks and started smelling electrical catastrophe I have a master switch that I can shut down everything on amp rack so I hit the switch and the VADM4 was smoking like a chimney. I do not know what happened to it but I have to assume it had something to do with those those chincy generic plastic rca inputs. I would not recommend the VADM4 unless those inputs were redesigned much sturdier. If that happened I would buy another one

By Wade on August 10, 2021 Verified purchase

So powerful

I barely had to tap into this thing's power to bring everything to life. This has to be an underrated wattage. My door speakers are absolute monsters powered by this amp.

By Brian on August 2, 2020 Verified purchase

Great

This is the 2nd one I’ve bought. One for my boat and others for my Harley. Fits anywhere and sounds great. The one in my boat did get hot an turn off periodically but it’s played at full inside a 100+ degree compartment. Haven’t installed in the Harley yet but sure it’ll work just as great.

Amazing little amp

This app is so small but yet produces so much power I was shocked when I first saw it but it definitely does what it needs to lots of power very clean sound

amp

I have used sonic for years and all their products worked as promised, knowledgeable staff, very good prices and you can depend on their products stats being correct including watts and specs!!

steve

small not much heat easy to hide in car! It pumps

By Steven on July 22, 2020 Verified purchase

Small Amp BIG PUNCH

This thing is amazing it really cranks out the power and it pushes more power than it says! My 4 speaker system that this Amp is connected to is LOUD,CLEAN, and CLEAR!!! I am using this Amp on my 2018 Harley Road Glide

By Kipling on February 3, 2020 Verified purchase

Good things come in small packages

This mini amp delivers big on sound. Fits under my front seat with room to spare. Once I got it tuned right I couldn't be happier. Powering a set of 6.5 co-axial rear door speakers and a set of 6.5 component speakers in front door. The music sounds better than I expected. NVX has made a believer out of me with this amp. Give it try I think you will be impressed.

By Anonymous on December 15, 2019 Verified purchase

NVX VADM4 Micro Amp Sound Good, but Runs Really HOT

Bought this little amp back in November, but finally installed it yesterday (April 3rd). Amp is tiny, and was bolted to the bottom of a Pioneer DMH-2660NEX. It fit perfectly with some home made brackets. Amp sounds good and plays loud on JBL Club 8622F 6"x8" speakers without too much distortion. The Bench Test on You Tube verifies the Amp's advertised specifications.

My only issue with this Micro Amp is the running temperature. The amp runs HOT, and I mean HOT. You can't hold the amp in your hands for more than 5 seconds. Now this design is supposed to be Class D, and should therefore not run this Hot. Nonetheless, I believe the amp needs a better designed heat sink, or a cooling fan. Only time will tell how long it will last, since Heat is the Achilles Heal of electronics.

Great amp!.....when it worked

Install was easy and straightforward. Adjusted the settings according to the SMD CC1 and DD1. During testing, noticed the unit would get hot. Really hot. Had to let it cool down before proceeding with the rest of the installation otherwise it would burn my hands.

Amp lasted about a year before it stopped working. During the year, it would intermittently go out before finally kicking the bucket right after the 1-year warranty.

Ordered another one and hopefully, it lasts longer than the first one and doesn't run as hot.

Great value!

I have just recently been turned on to NVX. The fact that they are CEA certified is a huge plus for me and their prices are excellent.

By Anonymous on April 15, 2019 Verified purchase

Worked amazing, until it didn’t.

Loved this little amp, was powering all NVX speakers and sounded great!
Didn’t “pop” on start up
Crisp clear sound
Small foot print.
BUT one day it lost the front channels, amp is still under warranty but can’t get any emailed response from sonic electronics.

By Kevin on February 5, 2022 Verified purchase

Holy soy milk!

Had the 4 channel mini rockford t400bdx or whatever it's called & when I switched the crossover to full range it got stuck between frequency or something & smoked the amp after about 1 year & I needed something small cause there wasn't much room so I figured I'd try this mini amp for now.... it actually sounds better than the rockford ever did! I bought another one for back up & still spent much less then what the rockford cost. I'm so impressed with this little amp! Just buy it already! It's gonna surprise you, trust me!

By MARSH on January 27, 2022 Verified purchase

Little amp. Big power!

Love this amp. Got it powering front and rear speakers in my kid's old Accord and it sounds great. Huge upgrade.

By John on May 19, 2025 Verified purchase

Great - Harley Street Glide

This is a great amp, especially for bikes. It’s small, powerful, and reliable. It fit perfectly in the fairing. It’s paired with a Rockford Fosgate DSR1 and Infinity Kappa Perfects (fairing and bags) for pure sonic heaven. I see others spend a lot more on amps for their bikes and I don’t understand why.

If researching audio equipment for your Harley like I did, NVX is a good amp for your short list of contenders.

By MAD Mike on November 7, 2022 Verified purchase

Great output for such a small amp!

NVX offers great quality for the price! The size of the amp and claimed output are what reeled me in. It fit my mother’s 1972 Karmann Ghia perfectly, she loves it!

By Ariel on July 22, 2020 Verified purchase

Great value!!

Product just as described, compact and powerful, sounds awesome on my street glide! Great seller! A+

By Michael on April 29, 2020 Verified purchase

Power in a small package

I'm really surprised at how this amp makes my front JBL GTO and rear JBL concert series speakers sound. Installation was a breeze.

By Dan on April 27, 2020 Verified purchase

Pleasently impressed

Gets loud and clear! It has a warmer, more full sound than my previous Alpine power pack amp that went out. This amp gets louder than that amp and with less gain; so my turn signals and such in my 2015 GMC aren't quite as loud as before. Wish i would have picked this amp the first time.

By Branden on January 13, 2023 Verified purchase

Great little amplifier

Runs about 125 rms it's sound great love the size of the amplifier just wish it had speak terminal not just wires over all it's a great amplifier

By ronald on April 22, 2024 Verified purchase

Perfect size with great performance

I have been using a bluetooth speaker in my 1965 Mustang for years. I finally decided to install a hidden radio in the glove box and to put speakers in the package tray and front kick panels. I was shopping for a compact 4-channel amp. The VADM4v2 was the best option for my preferred location (not in the trunk or under a seat). It is mounted on a plate parallel with the floor and fits under the dash. I am impressed with the output and full adjustment for the HP/LP filters. I have Molex Mini and Micro fit crimpers/connectors to make direct speaker connections without splicing in the supplied speaker wire adaptors.

By Michael on May 6, 2025 Verified purchase

Small size, big power

I purchased this amp a while ago and just got around to installing it. It's crazy how small it is and how well it pushes the four hifonics 6x9's. I'm a big fan of NVX products and customer service. If your looking for subs amps or speakers definitely check them out

By Dan on February 7, 2025 Verified purchase

Best Mini Amp

This amp was a breeze to install and tune. I did a speaker swap and was amazed at how much CLEAN power this mini amp generates. I used the NVX OFC amp kit, and had notice zero thermal issues. After 15 minutes of music, this amp was still only warm to the touch. Paired with a NVX LOC, I have the gain on the amp set all the way down, and can barely stand to turn the volume to max. This is an absolute great value for power. The size is almost unbelievable. I am so happy with this amp.

By Jonathan on October 3, 2024 Verified purchase

Sweet amp

I really like the fact that it fit in the intended space. With a little reaming of a couple hole it bolted right to the soundstream head unit.

By bradley on September 27, 2024 Verified purchase