Customer Ratings & Reviews

Great buy

The kit would work great in a car but in a boat the kit needs to have alot more speaker wire and a longer ground wire

Loud, Cool, and Clean

Pros: Class D (Runs Cool), Small, Clean, Powerful. Louder than you can stand and no distortion. Good built-in crossover with DBO.

Cons: Cops apparently don't like your stereo to be louder than their sirens...

Opinion: Everyone thinks their equipment is the best and after spending so much time researching all the different models I can say I am very happy with my amp. Infinity gear is top notch, they are geared toward accurate music reproduction and true fidelity. This amp is a perfect match for the Kappa speakers as they are 2 ohm.

Notes: Another review stated that the power terminals are unprotected...Not true, they are encased in clear plastic and are not a risk for sparking.

Equip: JVC KW-AVX820, Kappa Five, Kappa 693.9i, Kappa 60.9cs, 2 Farad Cap... Haven't decided on the Sub...

CAN'T GET ENOUGH OF MY NEW KAPPA FIVE

I installed the Kappa Five on my sailboat in the main salon (it replaced my old Reference Series 5761a). It powers 4 sets of speakers throughout the boat (through separate Niles volume controls) and 2 subwoofers in the main Salon. Performance is absolutely superb (the water ripples abound the boat). The installation was clean & simple. The Sonic Electronix support staff guided me through the one question I had & they were just great. The only problem I have is I don't have enough time to spend on-board GUSTO II to enjoy my new Kappa Five. Thank you for a great product at a great price with outstanding customer support. Be assure that I will look to Sonic Electronix for all my future stereo needs.

Good stuff

I got this kit for 50% off with my NVX amp. The power wires are very nice, the 6channel RCA cable is fantastic and the speaker wire is great quality too. The assortment of connectors they give you didn't really help. I ended up purchasing my own nicer ones.

By Nathanael on April 22, 2020 Verified purchase

Awesome Amp Kit

This kit was free with an amp purchase. I definitely like it, but I used 9 conductor speedwire for remote wire and 4 speakers. Worked out very well overall, great quality.

Very complete! High Quality

What a great kit. Far exceeded expectations. Nice touches like, mesh loom for the engine compartment on the 4GA power cable, heat shrinked where the you cut to install the fuse. Speaker wire is heavy gauge. The power and ground are come with the end connectors installed. My only complaint is there are no instructions so I had to reconfigure the fuse to add the rubber connectors. At least I assume thats where they go as it didnt have waterproof bushings.

By Ron on March 16, 2018 Verified purchase

Great kit

I was impressed with this kit. Their claim of a "true gauge" wire seems to be true because wires are thicker compared to other wires I have used claiming to be the same gauge. Overall the wires seem to be of great quality. Patch cables are good. They aren't super high end, but they do the job well. I'd recommend it to anyone looking for an amp kit.

By Kenneth on August 13, 2015 Verified purchase

Great Amp

Excellent 5 channel sound, very compact and even after an hour of hard use was only warm.

Awesome kit!

Nice flexible, durable, strong wires! Everything you need! Makes for easy connections/install! Thanks again NVX and Sonic!!!

NVX XKIT46 (5- or 6-Channel Amp Kit)

This Amp wiring kit was perfect for my 5-Channel amp. Wire is good quality and so far I have had no issues. Would not hesitate to recommend.

By Anonymous on June 13, 2018 Verified purchase

Infinity kappa 5

Excellent sound quality I would recommend to anyone product arrived as promised

Finest sound quality

I have this amp for 4 months now, there I have connected a pair of Infinity Reference 6030cs and a pair of Infinity Kappa 62.9I, with an Alpine CDE-154BT, I started with a single Kicker TCVT82 (10TCVT82) and the bass was just OK, then I bought here another pair of Infinity Reference 1062W installed in a sealed box, with just one bass speaker was an amazing sound.... the sound is the best quality for the price, very good sound balance and quality, very good noise suppression.

Infinity Cappa Five

Best Bang for your money, does the job quit well, I have for 4 months and performs flawless. When I listen load music it runs hot but no problems.

Worked great until?

I have 2 of these units that i bought 10 months ago. One is in my car and the other in my son's car. Mine is still working great and his went out causing the speakers to squil. He was always adjusting his (teenager) but he did know what he was doing. I got mine set the way I like it and had no issues.
We are running kappa 4oms speakers/sub with a rockford head. Make sure that you put spacers (1/4" min) between the unit and what you are mounting it to or it will overheat. The techs with Sonic helped me order the system and helped me with hook up. So far with the return of my son's amp they have been very courteous and helpful. I havent recieved the replacement yet. So this review may change if it doesn't go smoothly. Overall i would recommend the whole Kappa line.

Output issues with the RCA's

The build quality of the amp is excellent. I may have just got a defective item. 2 of the channels for the speakers do not put out their full potential power. I have tried switching rca's and I even bought a new deck and new speakers because I thought the outputs were messed up on my Panasonic deck. Come to find out, putting all of that new equipment in did nothing. It has been the amp the whole time. But who would have known? It's a "new" amp. The two channels that actually worked sounded great paired with some rockford T1 components. I would suggest this amp if you can get one that works.

Great Amp Kit

This is a great amp kit. The actual wire is much thicker than other 4 gauge amp kits. It's also a very affordable price. I'm happy with the kit.

By Anonymous on April 1, 2019 Verified purchase

Everything you need

I live by these and FREE with an infinity amp. You can't complain.

Awesome kit!

Nice flexible, durable, strong wires! Everything you need! Makes for easy connections/install! Thanks again NVX and Sonic!!!

HQ Amp

Not the loudest amp on the market but it certainly will give you high fidelity sound. If you want to have monster thump look elsewhere, if you want to have studio sound this is the amp

DOA

i bought this amp for my F150 there were certain features that i liked . Like tuning from the top side , amp came in DOA, upon hooking up it sparked like a stick welder , that was the first hint , then i turned amp on and it went into protect mode, and buzzing from speakers , i shot it off and it never came back on , might have been good but i dont have time to keep swapping amps to see witch one works and for how long , i was afraid for a minute it might have blown my speaker all new including sub, including correct wiring, sonix has been very good they did take it back but i did not up for the same amp, i went Kicker CX600.5, A/B-D tech , same foot print , and i believe more reliable but did not get it yet when i do i will right a review. This Infinity amp is a great value and has lots of features but based on my experience durability would be the most important aspect , excluding sound quality that is also at the top of the tier.

Great Kit

I've used this kit before. It's great, quality and aesthetics are great.

10/10 would do again.

By Justin on March 17, 2017 Verified purchase

Unbelievable!

Great power and clean clear sound out of a very small amplifier. Easy install and great controls. Mounted where there is not much ventilation and it only gets warm.

By Anonymous on August 9, 2019 Verified purchase

Very High Quality

Very High Quality wiring kit. I was impressed with all that came with the kit. The only suggestion I would make is to have the kit come with the fuse already mounted in-line at the 18" mark, between the two tape marks on the hot wire.

By Mike on March 26, 2018 Verified purchase

Safety Issue - not yet installed

The power and speaker connectors are not insulated. They are exposed and stick out significantly from the amp. The power connector sticks out at least one inch with the 4/0 AWG adapter. I don't have to tell anyone what would happen if a metal object were to contact the power connectors. Yes, the power wire is fused with a 100 amp fuse, but there will still be a lot of sparks on the way up to 100 amps, and some damage.

The other amps I've seen have insulated power and speaker connections. The Kappa Five will require me to fabricate some type of insulating cover to protect all the exposed (and hot) connectors.

Wish I would have paid better attention to that before ordering. My bad. This amp may work well for your installation, but be warned about the exposed connectors and take appropriate action to protect it.

I'll post a further review of operation & reliability if I decide to keep it, if that's possible.

Maybe it doesn't matter so much, but I'm a former aircraft electrician for 20 years in the Navy. I've seen plenty of sparks fly with a lot less current. If I keep this amp, you can bet those connectors will be shielded, and good.

The "2" rating for the design is for the connector issue alone. With insulated connectors, I would give the design a five and bump the other ratings up at least one point.

great quality. so far so good.

very high quality 4 gauge wire. I used this kit as an integral part of and upgrade in my 2016 jeep jku...I could not be happier with the way my upgraded premium marine grade kicker speakers sound with my marine grade 5 channel amp. I'm only running 800 watts total, 400 to the kicker 10" sub..also a top of the line sub from /kicker. but the clarity of the highs and added non-distorted punch of bass is phenomenal! plus I your guys' Q&A videos are awesome! keep it coming and hopefully you will get more Jeep Wranglers!!

Great value

Good quality wires and comes with the basics for a clean looking installation

By Anonymous on December 11, 2019 Verified purchase

Quality Kit

Seems to have had everything I needed but did come up short on speaker wire although the installation was in a large motorhome.

Great Value

Product exceeded all of my expectations. The size of it is great which makes for ans easy installation. The sound quality far exceeds any other 5 channel amp that I have installed.

Mades amp install easy and quick!

This kit had all the necessary components for my amp install.Components are durable and visually appealing. Install done about a year now and component still look as if they were just installed. Wire lengths were enough for my install (5 channel setup in a compact hatchback vehicle). Great kit!

By NG on October 12, 2017 Verified purchase

Great product

As advertised. Power wires very flexible. Clean sound delivery. Couldn't be happier.

By Christopher on December 27, 2016 Verified purchase

NVX XKIT46 (5- or 6-Channel Amp Kit)

The wiring kit contained exactly what I needed and even a few spare parts/connectors. The power wire had an abrasion resistant sheathing over the section that is under the hood and the ground and power wires included precrimped ring connectors that work and look great. You can't beat the quality and convenience for the price.

Great quality

This is my second NVX wiring kit and just like the first, it is well made and true to spec.

By Brian on April 11, 2018 Verified purchase

WOW

The kit came as a package deal with a infinity amp, not paying much attention to the bonus I became curios when I recieved the shipping info package was like 100lbs. Not much hardware however the cables are stunning, clean super elastic I am sold 1st class Sonic

Great value

Kit has everything you need to do amp install. Quality of materials is surprising for the price.

Nice Install Kit

NVX install kits are some of the nicer ones I have used. This on in-particular works great with their 5 channel amp. I especially like the extra layer of protection for the cable running in the engine bay, give everything a nice touch once installed. NVX wire is exactly like they say and true to size. I keep some on hand for other projects (big 3 upgrades etc) and it has held up really well in everything I have used it in, including an Off-road truck where other brands have failed.

By Brandon on December 8, 2015 Verified purchase

One of the best wiring kit

Love the wiring kit. Comes with everything needed for a complete setup.

By James on February 4, 2023 Verified purchase

NVX XKIT46 (5- or 6-Channel Amp Kit)

This package contained everything and more than i needed to add an install an amp to my stereo system.

Absolute Best Quality

This NVX kit comes with everything and just because it comes with everything doesn't mean that quality has to be sacrificed. The quality of this kit is absolutely amazing and the fuse holder is so perfect that I ordered another one for my big 7 uograde. I got this for free with my amp purchase and I didn't even bother looking at another kit just in case because of what I read in the reviews. I'm halfway through installing my system now and I can tell you they give you more wire than you need. Will buy NVX products whenever I can.

Great Product

This came with everything needed to install my 5 channel amplifier. Plenty of speaker wire in the kit.

By Chris on May 1, 2020 Verified purchase

Love these kits

I ave used a few of these 4ga and 8ga kits. Speaker wire is flexible and comes with plenty of length love that the power wire is pre loomed and is nice and flexible. The connectors I usually don't use because I like to use ferrules but they seem to be good quality. For the price, you can't beat the quality!

By Ben on March 24, 2020 Verified purchase

Great Kit for the Price

You will not go wrong with this kit! It comes with everything i needed. I especially like the amp power wire that is braided for the engine compartment!

By Mike on May 2, 2018 Verified purchase

NVX and Sonic get it done!

I was skeptical when I ordered my amp and saw that this kit was included. I assumed that it was going to be a bunch of cheap cables and wires, but boy was I wrong. The power cables are extremely nice quality, they rival some of the best name brand cables I've used. The speaker wire is also VERY nice and the fuse block is legit, heavy duty equipment. The RCA's are a little strange looking and are probably the only cheap looking/feeling part of the whole kit, but even they are more than usable. I wouldn't hesitate to buy another one of these kits for my next install.

By Bill on March 30, 2018 Verified purchase

Just get it

Excellent purchase at the right time. Huge discount during the Christmas sales. Thanks Sonic! Fit my car and very happy with the quality.

Quality wire

Great wiring kit and speaker wire. Worth the price for quality.

Great Quality Amp Kit

Well made and is very sturdy. Easy install, True OFC. It's worth the investment on your amp and the charging system.

By Anonymous on June 22, 2019 Verified purchase

Great kit

Amp kit is the way to go. All the little zip ties and crimp ends really make a solid kit for installation for sure.

By Chris on August 10, 2022 Verified purchase

Complete kit

Amazing high-quality kit. This is a must for larger multi-channel amps.

By Figment on July 18, 2022 Verified purchase

Sounds very clean

Installed my crown Victoria pushing 4 Polk db 6x8 and one jl 10w1 in a slot ported box.Amp sounds really clean and eliminated a lot of noise common with crown Vic's.The 200 watt sub channel is fine for my JL ,punches well and I even turned it down a little with my eq.The settings are pretty simple and straight forward my only complaint is the lack of gimmicks like light up logos and such but it is a solid piece.I would recommend this amp especially for the price (black Friday) coupon.

By brian on November 25, 2023 Verified purchase

Good products, HORRIBLE SHIPPING

Great products BUT beware of sonic electronics false 2 day shipping……. I ordered this on a Friday, it is now Monday and FedEx has still not received my order! Yet someone had time to print the shipping label 9 AM Saturday

By matthew on January 30, 2023 Verified purchase

Service

The products are top of the line and your customer service is above the standard service. I was really impressed with your expedited response to any concern that I have had. You went above and beyond to resolve my issue.

By Kenneth on May 22, 2026 Verified purchase

Kappa 5 channel

Great amp for the price no complaints at all

By Shane on April 29, 2026 Verified purchase

Great value

Overall great wiring system !

By Jasmyne on November 2, 2024 Verified purchase

Great product. It made the installation that much easier.

By Kirk on October 4, 2024 Verified purchase