Customer Ratings & Reviews

Solved that static alternator whine issue

My brand new car's factory sound system sounded terrible so I decided to upgrade it. I had to keep my factory radio because the car's functions depend on the screen/radio of the car. I installed a JL audio 300/4v2 along with Focal components and after I was done installing everything, there was a tremendously loud static noise coming from the speakers, even with the volume all the way down. When I would rev up the engine, it would make a whistling, whining noise from the alternator. I spent 2 days trouble shooting the problem. Separating wires, re-grounding, running new wires, adjusting gains, etc. and none of that worked. I saw this LOC from NVX and decided to give it a try since it claimed to have a digital noise filter feature. Man, as soon as I installed I was blown away. That annoying noise was GONE! The music sounds crystal clear now. I purchased that particular set up because I wanted an SQ sound system and now it delivers that very clean music with absolutely NO distorting noise. I was stressed out for 2 days wondering how to fix it. If you are in the same situation, buy this LOC. It will end your problems with all that unwanted noise. Forget those "solutions" people talk about all over the internet about re-grounding, ground isolation, and all that junk. This LOC solved it for me. It was so easy to install, it has adjustable gains, and feels very sturdy. Even if you turn the gains all the way up on the LOC, you will still hear no unwanted noise.

Great value

Fast shipping works great with no problems. I would order other if i ever needed it

Ok starter Kit

It's a ok kit to buy but check the RCA jacks my kit came defective one pair of RCA jacks failed. When I finished completely installing it in my truck and turned on the head unit only to fine out 3 of my 4 channel amp was working had to take out the multimeter tested the Amp then uninstall all the head unit tested RCA jacks and one pair was defective I would assume that they would work they are New. So save time and test the RCA jacks for continuity.

By JESUS C on December 28, 2020 Verified purchase

Great value!

Fast shipping and I recommend it for anyone. Everything u see in the picture is what u get.

Good Value Kit!

Everything I needed and good quality wire, not like some other cheap thin gauge wire you get in similarly priced kits elsewhere.

By Adam on February 1, 2018 Verified purchase

Works as said

Everything needed for a 4 ch amp install. Better quality than other cca kits I have used before. Nice thick strands.

Excellent product

Easy to install in factory stereo. Great product. No noise at all. High fidelity sound.

Great deals

I recommend this to anyone. The shipping is fast and you always get a good deal.

perfect!

No unwanted noise, soft turn on and off, cant even tell its there. It does its job seemlessly in my 09 Jeep Grand cherokee with boston acoustics system. I wanted full range sound out of the door speakers so I pulled off the output from the factory amp of the dash speakers and rear speakers. All speakers are now full range and amplified with a kicker ZX350.4. I can keep the gain super low on the amp and cross over the speakers to keep the bass out with the amp controls. This LOC made all that possible to use the kicker amp with NO NOISE.

Good Converter

I bought this to replace another one that I bought that had terrible noise and poor quality. This one however is great and works as you would expect. Spend the extra couple of bucks and get this one

Great value

Included in a bundle package for the price well worth it

By Chad on September 15, 2017 Verified purchase

bueno

Me gusto lo fácil que es instalar lo y los resultados son bienos

NVX Output converter

This converter was easy to install plus it added power and more clarity to my speakers. It has a remote wire for my amp.

Perfection! NVX is the best!

Durable, small, easy to use, fun, quality build and sound! Great LOC! No unwanted noise! Love the gain controls and remote turn on for an amplifier! Works wonderfully with my NVX JAD900.5 and my NVX 4 channel rcas! NVX is the only way to go! I just can't get enough of NVX! Thanks NVX and Sonic Electronix for all of your support!

Awesome Buy

It was everything I needed one package for a great price

Worked great!

I installed this unit on my boat due to my radio had to pre amps.. Easy to wire although theres a bunch of wires. Works great for triggering your amp though! My radio put out 160W so I left all my channels on the unit turned down. Would highly recommend!

Works as said

Works good and is high quality cca wiring, better than many others I have used. Fine for about a 400 watt rms 4 ch amp set up. Larger go with 4ga to be safe.

By brian on November 15, 2015 Verified purchase

Digital Converter

I used this to convert wired to RCA. This device worked great. I eventually replaced the factory head unit with a Pioneer that had RCA outputs.

Good value

Good value. All the stuff you need for a couple of speakers and a sub to an amp. Easier than buying it individually.

By Jason on April 11, 2020 Verified purchase

Junk

Upon receiving product, I carefully read instructions. Installed unit as directed in instructions. Product did not work, so I cut the unit out and threw it in the trash.

Great kit!

Comes with everything you need to get going at a great price

By Tombo on April 28, 2020 Verified purchase

Bad quality

The wiring harness was bad out of the package. I could move the harness around to make it work, but I didn't want to install it. Had to run to a local big box store to buy another off brand one.

Amp installation kit

Belva did a great job with this 4 channel amp wiring kit. Had more than enough lengths on all wires. Terminals are solid. Will buy this kit for now on for my 4 channel amp installs.

Good product

I have not installed it yet. But it feels well, the quality of the materials is good, I will install it soon

Ex-Flock-4

Good unit, Good price. I have a 4 channel Amp, this is a 4 channel unit.
All 4 channels work. For $14.99 I did not expect it was going to do the dishes for me too.

Nice Kit

Worked great in my 1997 Tahoe. Had enough cable to put the amp under the passenger seat. If you're trying to put it in the cargo area, you'll need more cable.

By Anonymous on September 16, 2019 Verified purchase

Great product and cheaper than the other ones I have seen

This product is easy to install and is made simple due to the wires match the colors of the speed wire that I bought to get the correct sound out of my system would suggest this product for anyone that is looking to add an amp and sub to their factory stereo

By randy on October 18, 2017 Verified purchase

Nvx Line out converter

I had the Pac lp7 4 installed in my stock car stereo, wich worked great for connecting a Rockford mono amp for subwoofer and a 4 channel amp for speakers, only problem is I was having alternator noise even tho I installed everything correctly, I tried everything and nothing took the noise out, until I read some reviews here wich said this didn't had noise, so I installed this and to my surprise only one channel ( one pair of rca) worked. Instruction said if that happened, then use the ground supplied, but that didn't worked, I checked the rca with a multimeter and there was no voltage,, then I squeezed the cables and there was some voltage, but too low compared to the pac lp7, so this didn't worked out of the package, I put the pac lp7 4 back, at least I have sound with that one, problem is I can't ship it back, cause I'm at another country. I wasted 20 bucks with shipping for this Useless converter.

By Morris on March 18, 2016 Verified purchase

Great value!!!

its got that boom for ur truck. And just a little adjustment, can tone it down very easily. I very happy and I don't get any distortion at all. A+ in my book...

Works

Was easy to install and did the trick and good price

By Cheng on April 5, 2020 Verified purchase

Works that’s all I care about!

Works Like I wanted too so yea I recommend it

By Ismael on August 17, 2020 Verified purchase

Great value

Exactly what I need for my 4 channel amp will b installed this weekend.

By Noe on April 28, 2020 Verified purchase

Love it

Better than I expected.Plane to buy a two channel for my subs.

Nice

Outstanding item I used it before and that is why I order more.

Great product

It’s really remove car noise in the wire,good product

By Anonymous on May 6, 2019 Verified purchase

Great value

I would recommend this to anyone who's looking to do it yourself subwoofer

Met Expectations

This item came as described. It was easy to hook up and met all my expectations!

By Anonymous on August 26, 2019 Verified purchase

great product

NVX XFLOC4
works great, sounds great, easy to install and small enough to hide behind factory head unit

Good sound but defective unit

Sound quality was good, no distortion, however I had a intermittent short to the left rear speaker. All connections good, so tried to adjust the RCA output pot screws and the LR fell out. (no i didn't over-turn).
Also, the trigger wiring did not work. The LED trigger indicator worked, but amp didnt power on. So I had to run a 12v wire from radio ignition wire to the amp remote. I think got a junk unit.
Called and spoke to Randy at SonicElectronix customer service, he's sending a replacement unit. Will give more feedback after second LOC installed.

By Dave on July 1, 2016 Verified purchase

Great LOC, great price

This turned out to be a great purchase. Sound quality is great and each line level is adjustable to help tune your system. I am impressed with the quality and will be purchasing more NVX products in the future.

By Steven on July 26, 2020 Verified purchase

Very good value

Everything I needed was included in this kit to install my Amp.

The connection

Very well made nice package wow come with mostly everything you need great value for wires and amp

Good for small cheap builds

Not a top tier brand but gets the job done for my garage builds. I don't trust it for major builds but not bad of a product

By Jay on March 29, 2024 Verified purchase

Very happy

Plenty of bang for your buck, i would recommend for any 4 speakers needing a bit more

By Nathan on July 20, 2019 Verified purchase

Sonic Electronix delivery was super-fast. The Amp Wiring Kit looks absolutely amazing. Everything you need to install and hook up your sound system. Can't wait to get the install complete. Thanks SE!!!

By Bruce on June 23, 2025 Verified purchase

Great little amp

Easy to hook up and use. Not many bells and whistles to worry about adjusting just a clean sounding power boost.

By Chris on June 1, 2024 Verified purchase

Everything I needed!!!

This kit had everything I needed to hook up for channel amp.

By Rob on April 26, 2025 Verified purchase

Nice kit

Nice kit for the money. Very easy material to work with and came with everything needed.

By Adrian on March 29, 2025 Verified purchase

Great product

Used for installation of kicker amp to head unit. Works great

By Scott on December 24, 2025 Verified purchase