NVX XCAP10H (TRUE 10 FARAD CAPACITANCE) - Customer Ratings & Reviews

NVX cap

I have a 2200 watt hifonics amp pushing my subs (hard) and a hifonics 1000 watt four channel running my components. Never once have I had headlight dim or anything. If youre looking to save some money by not buying another batter/alt this is for sure the way to go.

Awesome Cap!

Had to give it a try and it did its job as described. This cap made a big improvement in my system, bass response was better and much less power loss to my aux equipment. Never been a believer in capacitors but this one changed my mind, very happy with my purchase! You will not be disappointed.

Great investment

Bought it,installed it, car is now thumping, no dimming

capacitor

easy to hook up very flexible install , works like a charm a very good product

IT'S GREATTTTT!!!!

The Nvx XCAP10H is a fantastic product, my other capacitor died and I needed another. So I upgraded to this one couldn't be happier

Very sleek and powerful

Great for a dual amp setup. I'm running two 5000 watt re-audio amps to two re-audio 15xxx's. The cap alone could handle short runs, but after added a second battery, it never drops below 12 volts. The cap looks great and only displays the voltage when it changes. Big punch in a small package!

one to buy!

This thing rocks,very slim,very easy to install. Would recommend this cap if your looking for something that can be mounted almost any wear. You can use 4 or 8 gauge, it even drops down to 0 gauge. Very cool product

One of the best!

I have installed somewhere around 30 capacitors in the automotive world and each one has some kind of drawback, sometimes even making me uninstall the cap in favor of another one. This cap, however, is one of the best I have ever used. I am having a difficult time finding anything negative to say about this cap. Somehow, NVX managed to fit 10 farads into one small package. Upon further reverse-engineering of this unit, I discovered one small oil cap, and numerous electrolytic caps. This hybrid approach really delays the need for additional batteries in the trunk because it has mechanisms for quick and slow power delivery in one little box. This kind of technology will never reduce your need for a higher-powered alternator; if your system draws more than your current alternator can sustain you need a bigger alternator. This cap reduces voltage fluctuation in the system which can be noticed with "dimming lights". Voltage fluctuation in my system before the cap was about 2.5v with a properly sized alternator. Now my voltage fluctuation is at a cool .4v!

Not sure

I haven't had a chance to put this to the test. Unit is easy to install, however the manual could be a bit more specific. Had to watch you tube videos to figure out how to properly charge and discharge it.

Well worth the money so far

I give it a 4 simply because the instructions are either read in a understanding but not accurately helpful like what size fuse you are supposed to use and didnt mention if your supposed to fuse from the amp to the cap and cap to the battery it says to fuse to charge the battery and then that how to charge is confusing. You should ( sonic) should put a instructional video that is about this cap and only this cap. I hope this helps whenever wants one just make sure you know what your doing or you can hurt yourself. I use a 1500bd and a t2 s1 and 2 batteries and this cap big 3 and ho 180amp alternator and this cap was worth buying it helps my car even when I'm not using my stereo I feel and notice the difference from turning my headlights on up and down the windows no idle drop at all. 97 honda prelude

By David on October 2, 2020 Verified purchase

works like a charm

I was very skeptical about purchasing a cap because of all the thing i heard about using it. They say a cap is a band aid to your electrical system and don't see any benefit from using it. Due to the limited space i had in my storage area under the back of my Durango, didn't have enough space for a battery. Reading all of the other reviews of this product lead to to purchase this cap. I follow all of the direction it took about an hour to change it up. This cap is the truth I'm running a 2500 watt Brutus elite amp down to a 1 ohm load and at full power my voltage don't drop below 13.8. I did do the big three but I'm using the factory battery. It also made the bass notes hit harder and cleaner due to the cap feeding it all the current it needs. If you were skeptic like I was, this is no doubt the real deal. You wont be disappointed

Solved my audio drop out issues

I know that some say that a capacitor is like a bandaid, but this is one great expensive bandaid.
Over the past few months, I've had audio drop outs when I turned up my amp. Protected light would come on, especially on punchy basses.
I checked everything. Wire connections and all. I have 1/0 awg connected to a 150amp fuse with a Kicker 1800watt amp. 2 Power accoustic 1500 watt rms (aware of the wattage difference in the amp), 150 amp alternator with a newly installed Optima yellow top battery.
Everything looked okay. Maybe I need an upgraded alternator, which doesn't make sense because I had this same setup in my Honda Civic with no issues.
Well, installing this, solved the issue. It's even better than the Honda Civic loudness I believe.
Now, I'm upgrading the amp and speakers for even more power. Alternator upgrade as well.

By Anthony on October 26, 2021 Verified purchase

Best bang for the buck

Bought this last year to drive 3 amp system and maintains voltage no matter how I play it. Having the built in distribution block is very helpful. The only thing I did not like was the charging board but I used an old fashion test light and it charged in no time at all. I believe in this product so much buying this cap again for my new ride. Looks very similar to the Rockford version but at half the price.

By Anonymous on April 23, 2019 Verified purchase

Great capacitor

Does exactly what it was designed to do. Easy to install. Have it on two pioneer subs and they have plenty of juice for those bass hits now

Doing a great job.

Got it on a DD m4a and it holds it pretty solid.

freaking awsome...

it work like crazy ,i have just instal today ( 4-june-16 ) .. i have an amp. rockford fosgate T-2000 @ 2386w. rms @ 1ohm, no more diming light anymore and my subwoofer are in a box of 4 ( 400 w rms X 4 = 1600 w rms total ) ,, this capacitor exceed what i was expected for....it took 3 days for shiping im from Qc. Can., service is amazing also...

Sweet cap

This is hands down the best cap you can buy, super good power and everything nvx kicks ass

By Brock on December 4, 2020 Verified purchase

Absolutely satisfied with my product

Fast shipping well packaged really happy with the product couldn't ask for a better product.

By Tealiivahamana on May 7, 2020 Verified purchase

great deal

great product, used on both of my cars and highly recommend, not just a capacitor but also a distribution block so if you have more than 1 amp of need a capacitor this one is strong and kill 2 birds with one stone,

By anthony on April 1, 2020 Verified purchase

#1 Bass Cap

Without a doubt this is the best bass cap you can buy! Rockford foagate makes the very same cap there is nothing different about it, besides the price! I have 2 12" DC AUDIO LEVEL 3 subs being ran by an Incriminator Audio 20.1 amp on a factory alternator inside a 2007 Yukon Denali and I have "0" light dimming issues with this installed..I mean none! It takes a while to charge up at first using the included resistor, but once it's charged it works perfect! Been thinking about getting another one just to keep on hand in case they discontinue it. I really don't feel there is a better one out there right now, and I've been buying caps since 2000 and installing car audio in my car since the 90's. Buy it!...

BEST BANG FOR THE YOUR MONEY!

All I can say is WOW!!!!! No more lights dimming, bass is noticeably more louder as well!

By Anonymous on October 29, 2018 Verified purchase

Great product

Great product does everything it says it will do......miles ahead of your typical capacitor

Powerful upgrade

Nice install options however nowhere in the instructions mentions the doors that open on the sides. Nice display and seams to have added clarity and bass. I have a system volt meter on the dash gained son stability. However I’m running 3. Interestingly it’s exactly identical to the Fosgate.

By Charles on November 8, 2017 Verified purchase

Really nice

I have powered this with 0g and an easy fitment and have 2 amps running off from it. I say it helps the stability of voltage along with the other upgrades to my electrical system. It has been a welcome addition to my system.

By Brian on August 2, 2020 Verified purchase

Very Nice !

This is the best 10 farad capacitor for the money on the market right now. I had a whining noise before I installed this and after the noise is gone. I grounded this the the frame and ran the other wires back to the 2 amps and the whining sound is gone and I have no interruptions in bass at all it supplies a constant voltage to my subs .

By Anonymous on March 10, 2019 Verified purchase

Great Capacitor

Works like a champ. Pushing over 1500 watts RMS and voltage is always above 14 volts with factory alternator.

By Anonymous on January 22, 2019 Verified purchase

NVX XCAP10H (TRUE 10 FARAD CAPACITANCE)

NVX XCAP is a Very nice product. Would highly recommend

By Anonymous on May 13, 2018 Verified purchase

Great

Its identical to rockford fosgate but cheaper in price but is equal in comparison.

By Santika on April 3, 2018 Verified purchase

Awesome

I have a 270 amp alternator and still couldn’t keep up with my system. I through this in parallel with my sub amp and door speakers amp and now my volt gauge doesn’t move. Very happy considering my system peaks 320 amps and my alternator output is 210 at idle.

Excellent quality

Purchased this cap at act as a buffer on my electrical system. This is in no means a bandaid for a weak electric system. I love that it has a built in voltage meter and the distribution blocks worked out great for my amp setup. I have this on a Hifonics Colossus Pro 5K and even with this cap it seriously pull down my voltage at full tilt, but I'm having a custom built 270amp alternator for my car right now. I will be perfect for keeping a steady voltage flow to my amp and prevent spikes. I would definitely buy again. Exactly the same as the more expensive Rockford hybrid cap at half the price.

By Jason on February 3, 2017 Verified purchase

simply awsome

i just receive the NVX Capacitor 10 farad competition , brand new , all i heard was good comment about this cap, i can now confirm this is a very good product for the price , similar like Rockford Fosgate but cheaper..thx Sonic.

Awesome

I had ordered two of these NVX capacitors, one was defective out of the box but they replaced it fatherly quickly, saved my truck from stalling out with my system. I currently run one 12” EVL Skar subwoofer with the recommended 1500 watt amplifier and it would draw enough voltage to stall out. My lights still dim slightly at higher volume but for the price, size, and it’s effects I definitely recommend this product. My only complaints would be the poor labeling one the blocks themselves and the flimsy door covering said blocks.

By Randy on January 17, 2022 Verified purchase

pleased

pro's-nice, love the read out and the ease of install.

Con's- the only thing I would like to see is better charging instructions with the charging light they have. it has four wires off it i now pos and neg. and there operation. if I had not ever charged a cap prior to this on it would be difficult and confusing.

By Robert on January 5, 2016 Verified purchase

Great cap

If i had to guess id say these are built side by side with the fosgate caps it works very well and good quality definately worth the money

By shawn on September 9, 2024 Verified purchase

Nice cap

Works well, helps with voltage dip when the bass hits. I like the display, is nice to see where I'm at voltage wise. 3 outlet per side distribution blocks is nice. It lets me power both amps from the cap with 3rd as input. Easily accepts 1/0 gauge wire without any issue.

By philip on March 26, 2025 Verified purchase

Works Amazing

Just what I needed to stop my lights from dimming. This item is the exact same as the fosgate at a better price.

By Robert on February 21, 2025 Verified purchase

Under construction

Will update on how everything goes

By Chris on February 5, 2025 Verified purchase

Great value for a solid cap option.

I was first introduced to the NVX brand on my other car build. I like the look of the product, it has a reputable name built, and was highly recommended brand by the team. I love the look of the cap, the blue display, and the fact it has multiple out puts. I have zero light dimming issue, and the sound stays solid at full push. It is not a lot on the system I have, but I have no worries as I expand on it. Will be buying a second one for my other build.

By MARK on January 31, 2025 Verified purchase

No more dim lights great product

By Joany on November 24, 2024 Verified purchase

Nvx, Exellent products

By Gerardo on August 8, 2024 Verified purchase