Customer Ratings & Reviews

Quality Product

Works very well with my Rockford Fosgate sub system in my car.

good deal!

Pretty decent value for the price. Worked out great, thanks.

Usable

The wiring has done me right so far but the only thing I don't like is the speaker wires. You have to carefully split it so the wire doesn't show. Other than that minor thing everything was great and a great value!

price is right

the price is right for this setup. the ground wire and the power wire are to big for my amp but i made them fit. better to have to much than not enough so if i upgrade to a larger amp it will be fine.

Accessories for product

Just what I needed and made installation so much easier. Thanks

awesome products

I run 2 12inch audiobahn exursions on this amp and it pushes them very well. The size is perfect not to big and fits right unerneath the seat or small space. The best part is it stays pretty cool even after running most the day.

good wires

I like the wire kit I got with my amp it seems to be holding up goo it handles the power of the amp I got but I would of gave it 5 stars all the way around but I wold of like the ground at less 2 more feet for good use but over all its a nice kit

Good stuff

Great product last a long time good value for the money.

Cable

Good product fast shipping awsome seller... keep up the good work.....

Perfect kit

Comes with everything you need. Works good with my 800w system

By Chad on May 14, 2020 Verified purchase

Good deal.

I purchased this for the value. Everything you need for a simple single amp install in one package. Good quality with good value, thanks.

Great Value Kit!

I would highly recommend this package to anyone looking to do a cheap install, i have friends who got these before and its nice, simple and cheap!
Never had any issues, great value!

By Craig on October 15, 2016 Verified purchase

Ok. not the best kit.

The eyelet connectors are flimsy and the speaker wire is hard to separate. When it does it exposes some of the copper. Otherwise the kit is ok.

By Lloyd on December 10, 2015 Verified purchase

Ok value

Good product , but not enough speaker wire to wire two front door speakers in a scion xb. I guess it would have been enough if I had run one of them with the power wire instead of running on the other side of car, but everybody knows that's a bad idea due to engine noise. You would think they would take that into consideration. Also not a big fan of the square and round speaker wire very hard to separate and strip without exposing bare wire.

Great value

Does the job does what it needs to do. It was packaged nicely.

Nice looking but...

I'm runing 1800 total amp power now so I bought this product to make sure I had enough CAP. When I got it, I removed the old one and put this one in according to the manual and all my light still dim when the bass hits. There was some trouble charging it.

You get what you pay for....

Bought this kit for my 650 watt rms amp. Not true awg 4 guage, but close.jacket is pretty thick.all wires flexible. Reached under the back seat of my 2008 silverado crew cab. But not a whole lot of slack if your going to a trunk. Fuse is ok... ive seen better and worse. Bottom line, if your on a budget and running 800 rms or under, this will work fine.

By Trevor on June 8, 2016 Verified purchase

Great wire

Ran wire though firewall with ease m, and is powering my 1500 RMS amp no problem.

By Carey on March 12, 2020 Verified purchase

Belva BAK42BK (Black)

Great prices on great equipment and Fast delivery thanx sonic

By Anonymous on March 6, 2019 Verified purchase

Pretty damn good

The capacitor works great. Easy install, however the flashing blue strip at the top can be distracting if visible from the driver seat. That aside, very pleased.

Great value

Bought it to try out but is a really good power rating and not cheaply made for price and is really flexable

By Paul on October 17, 2017 Verified purchase

Great price

This kit has a great price. Everything in the kit seems to be great quality much better than expected for the price. Very fast shipping. Everything you need to do a amp and sub install. Will be ordering more.

By Deek on December 20, 2019 Verified purchase

Excellent product

Very nice love what I got came two days early couldn’t ask for more

By Anonymous on June 4, 2019 Verified purchase

Perfect!

Was surprised with the quality of the copper and actual size of the wires compared to other cheap brands like Schoshe. Worth every penny.

Great Buy!!!

Looks great. Lights up blue - I like the color. You can hook up many small lines to it or a couple big ones with o-ring connectors. Shuts off automatically and turns back on when voltage change occurs. It also has a digital voltage display. And a voltage adjustor. (Not sure in how that affects stereo performance yet though). The light on the front bounces to how much capacitance is being used- kinda cool

wire kit

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

By Steven on July 22, 2020 Verified purchase

Good kit

Basic kit to get you going. Speaker wire needs to be just a little better.

By Anonymous on March 25, 2019 Verified purchase

Great package

This kit had everything I needed to complete my installation. Great product.

By Tony on December 15, 2017 Verified purchase

Best ever

I've had a lot of different caps and so far this is the best 2000W/RMS 4500W/MAX this paired with sound stream power cell Voltage stays between 13.6 and 14.8 at max volume this is amazing. The only problem with charging was that I forgot that the resistors get really hot so all ways wear a glove or use pliers.

Great wires!!

After reading reviews and most importantly watching the video Sonic posted with this product, I decided to give it a shot for my Cerwin Vega VPAS-12. The wires are exactly as described, true 4 gauge, not all insulation like the other brands. The fuse block is solid and easy to set up. I was worried it may not fit the VPAS connectors since they mention 8 gauge, but it works and it is holding in no problem.

The only thing I did change was the actual battery and ground terminals, they seemed weak, so i chose something stronger and all is well.

Thanks again Sonic!!

By Fabio on March 16, 2020 Verified purchase

Decent Product

Works very well, wish it included longer zip ties but overall a good kit that has true 4 gauge wire!

By Lachlan on April 8, 2020 Verified purchase

Good price, excelent performance!!!

Boss has the best cost/benefit in aidio performance!! The number one in audio!!!

Good buy

I bought it because my sound system would dim my lights BAD. Once I put this in I didn't charge it all the way so it wasn't really helping, but as soon as I figured out why it wasn't performing how it was supposed to I discharged and recharged and now it's working great. The blue illumination is awesome.

Great deal fast shipping

I love this product it looks and functions amazing it was great dealings

it works

I have a punch 500x2 and a RF 300x4 on it and it keeps up with them

Good value

The product was very good ,for the price it was worth it ,its actually the best product i used so far i been shopping online....so yes i would recomend it to anyone and to shop on this website...

Nice

its very sleek. looks good. works well.... well worth the money.

Very well made products

For the price, this installation kit is great. You can spend 4 times the amount for killer connections but if budget and functionality are key, this is the best.

By JAMES on June 9, 2020 Verified purchase

Good Cap Great Price

This cap works great but I had to charge the cap longer than what it states in the manual. When I charged it for 60 seconds the cap had only reached 10 volts and lights dimmed. After discharging and recharging the cap up to 12 volts its been working great.

Boss CAP8

i loved the set up of the capacitor. i loved the way the blue went along with the bass of the song. i also love the led digital meter on the cap.

Great valule

Great quality wire, plenty enough for the job. Works great and made my install a breeze.

By Josh on January 11, 2020 Verified purchase

do not buy

The pros of this cap are as follows: It looks pretty cool. Thats it in my opinion for any good thing about this cap. I bought it for a 1600 watt system. I hooked it up correctly and it would not charge properly. The feet on the cap are cheap plastic and got all scratched up. There was no discernible difference with the cap hooked up and before I had the cap (light dimming). Finally when I disconnected the cap and followed the dishargeing procedure it sparked and smoked. I went to my local audio shop and the owner said it was tell tale signs of a faulty cap straight from the factory. Spend a little more on a quality cap.

works

this is a great cap took most of my diming away but I am running 2 lanzar 6000 of it so just a baby step

Product Review

I had a custom made box for for 2 10's made for my F-150 this cap looks awesome just peeking out from under my seat. Has a light rattle but nothing turning it up can't fix

great price

I had some trouble charging the cap, but after charging it, it was simple. after i got it all hooked up it looks sweet and looks great too

NICE CAP!

I have this along with a SHURiKEN SK-BT20 and my system never drops lower then 13.5v. I'm pushing 1700w rms and my lights don't even twitch! Also the display on it is pretty cool lol it mimics an EQ. Nice product, I would recommend it to anyone.

Never a problem..very dependable

I personally havn't experienced any of these problems other ppl seem to be having, but as long as you read the directions, charging it shouldn't be a problem at all..
I will admit that my lights seem to flicker a touch when i am stoped, only when low notes hit though.
And as for people saying their lights dim a lot, thats probably because the lights you are looking at are LED's, which if that is the case are much more sensitive to voltage fluctuation, than a incondecent light..so that's just kinda hit or miss, depending on your car. =\

Wired out

Great product, great price does excalty what I needed it to do... would recommend for anyone who needs to get there AMP hooked up properly.... comes with everything you need to do the job right

By Edward on February 18, 2020 Verified purchase

Works great

Cheap, good looking and keeps the power stable in my beat down 93 accord. No lights dimming, no alternator / battery fail so im very pleased with it.

Works well!!

1400rms and it keeps the volts above 11 at max level for my system. No lower price than at Sonicelectronix.

Awesome

SO good for the price, The battery in my RSX is quite small, this supplement's it well reducing the load on my alternator. Passive mode is super neat. (Shuts off when not needed) Need's a chassis ground to work and remote turn on signal.

capacitor

Bought this cap a while back and it works perfectly. Whether or not it is actually capable of 8 farads who knows, but it is doing all the work I need it to. The blue backlighting is also a plus.

Good product

All parts that I bought work properly exactly what i was needing thank you sonicelectronix plus i got a great deal
Transactions were safe shipment on time
Thank you again!!

Everything I Needed

Used this kit to run an amp to the trunk of a 2015 Kia Optima. Ended up trimming about 1½ft of excess to help clean up the install. Everything seems to be good quality. Ran the power wire down the driver's side and RCA & amp signal wire down the passenger side to avoid any interference. Plenty of length of everything for a full size sedan.

By Andy on December 28, 2023 Verified purchase

Good kit for the price

The power and ground wire are fine , speaker wires are interesting. One side has square and the other is round which makes it very easy to know what you hooking up to what. Came with everything it was supposed to.

By Daniel on September 12, 2024 Verified purchase

Great price and product

The best for the price stop my lights from dining if u follow instructions

Love there stuff been back several times will order everything I need form them

By Jerry on August 10, 2024 Verified purchase

Great value

Works awesome I really enjoyed it and it was easy to install

By Nathanael on September 7, 2024 Verified purchase

Amp kit

Everything you need for a basic set up

By Mahaish on May 11, 2024 Verified purchase

Need that extra voltage

The boss came through for my 2x12 subs pioneer setup. helps me maintain voltage.when my deep bass hits

By David on February 26, 2017 Verified purchase

nice

this amp kit surprised me how nice it was with the proper wires for the job

By Michael E on October 3, 2025 Verified purchase

Nice quality

Wired a 4 channel amp up with this wiring kit. Good quality wire and looks really nice

By Ron on May 18, 2025 Verified purchase

Great promo item

I got this item as a promo for buying my amp. Has everything you need. I would've preferred it to have a red power cable and blue remote wires.

By Aaron on January 15, 2025 Verified purchase

Heck yes

Sonic gave this to me with an order. What more to say.

By Tyie on June 2, 2025 Verified purchase

Free amp kit

Normally I use OFC but this kit was free for a starter system and has been running good since install. Wires are nice and flexible, lightweight and pretty well jacketed.

By Chris on January 11, 2025 Verified purchase

Great product

Easy to install and was a great price with on time shipping.

By jeff on December 11, 2020 Verified purchase

bonne achat

j'ai acheter se produit et pour le prix il en vos vraiment la peine

Just Buy It!

Nice kit and good price. I’d buy it again.

By Benjamin on December 28, 2025 Verified purchase

Fire Hazard

Had the Boss Cap8 installed in my vehicle and working fine for 3 months before it blew a fuse and started smoking. The manufacturer offered me a replacement as long as I paid the shipping and customs to the US which would cost more than the product. Not recommended!

This cap works great!

Must say this cap works great! The last cap I had the spl the studs broke loose from the housing. This one is alot better design and looks like it will hold up just fine. My lights don't dim at all even on the hard hitting bass. Looks good too!

By Spankie on September 3, 2016 Verified purchase