Customer Ratings & Reviews

good value

For a 1 farad capacitor it's a good product. The distribution cap makes ease of install versus a regular capacitor without one. The blue voltage display matches my setup currently. It does help with the power loss, but isn't enough for my 600w rms setup. For the money, features, and ease of install it's worth the money.

Big volts

My uncle big bubba got me this cap and I have no volt drop. I have some serious power I have a 25 watt system and this cap really helps a lot.

Solved my problems quickly.

Went from a junky Boss capacitor rated at 3 farad that broke to this one. Thank God. Seriously helps the dimming lights, quality made and looks sharp. The Boss one was all plastic and ridiculously looking and this fits nice in my car.

Great Product Great Results

I was impressed by the quality of this product. It supplies plenty enough power to my sub amp to offset my dimming light problem. Also fixed a spark plug energy shortage!

Nice looking cap

I have owned this cap for a few months now. It performs well. The best part is the charge/discharge device.
The volt display is not ideal for my purposes, but that is a small con.

Great cap

This is a great product. Have owned for about a month now and it just keeps pumping power to my amp. Everything stays stable and there is no dimming of my lights an its pushing a 1000 watt Hifonics hfi mono block. I would definitely buy again.

Great Product Great Results

I was impressed by the quality of this product. It supplies plenty enough power to my sub amp to offset my dimming light problem. Also fixed a spark plug energy shortage!

Works Great

Item works great, easy install, follow instructions for first use and you will have no issues

Exelent value

I purchased this NVX XCAP1F when I bought the rest of my audio system . I wasn't sure I would need one but with having a little Fiat 500 with a little battery and I am sure a bare minimum output alternator I put one in just in case . I am running a Boss CXX2705 amp that puts out 2700 watts peak and 1200 watts RMS so I put one in from the get go .I don't know if my lights would dim or not but with this baby there is absolutely NO dimming or power loss what so ever . This is a TRUE SPEC 1 Fared cap and made of the highest quality material .. I would put this up against any big name audio equipment out there , in my opinion it is built better then Alpine , Rockford Fosgate , kicker , ect.... , and is hands down the best value out there . Buy one , you won't regret it !! I have not cranked it up all the way yet because I am still breaking in my sub but at 65% of max volume it works without breaking a sweat '! NVX products are fairly new but are built perform !! ..Way to go Sonic for your superior product and service !!

Good quality

I bought this cap to go along with my nvx amp and I also bought the amp kit. I really like the quality of the amp kit and and the price was fair on the amp wiring kit and the seemed to have a fair price as well but after I ordered the cap I found it on nvx web site for 59.99 and contacted sonic electronic by email and wa told they would not price match. That kinda sucks that that I had to spend 40.00 more for the same cap and it not like the price match was some off the wall website it was the manufacturer of the cap nvx I guess that teaches you do better comparison shopping but over the cap and the wiring kit were pretty good quality

By Jason on June 9, 2017 Verified purchase

A Must Have!

No more dim lights and great sound quality!!!

Must have piece of equipment!!!!!!

This Rockford Fosgate capacitor is a must have if you are into custom stereo equipment ,there are only pros except for having to buy it that's the only con and even the price was great so that's not too bad !! There's a digital reading that shows your amps which allows you to know when your battery is getting low or if your alternator is about to crash , I had a system with 750 watts rms prior to buying this cap and after installing it i could turn it up loader without my battery being drained and the headlights dimming !!!!! Like I said A MUST HAVE!!!!!!

trusted brand

i have a mrp-m500 powering a 12" type r and im having less dimming and a slight difference of louder bass. if your pushing less than 1000 rms id recommend it. before when i didnt have this cap my headlights and lights on the dash would dim ALOT. now my electrical system for my car runs smooth, my speedometer is brighter and my headlights. but my headlight do dim just a little. btw im running with a stock batt. alt. and no big 3.

Fosgate Performs

This works like a champ! I have this hooked up to a HiFonics 1200 Brutus amp, pushing 2 Rockford Fosgate 12 inch P1's. No light dimming at all. No lacking in amp power ever! Didn't have to upgrade my alternator or battery with this bad boy. And it lights up blue to match my amp lights. Buy this product. Nothing but good things.

Impressive

I am always the one to say alternator, alternator, alternator. However, for my specific application, an aftermarket alternator was not an option. I am pulling roughly 70 amps of current and my 130 amp alternator was struggling to keep up even with the Big 3 in all 1/0 OFC and an Optima Yellow Top Battery. After adding this capacitor, my voltage stays above 14 volts all the time. I guess capacitors only work if you buy the best, rockford is awesome. On a side note, make sure you provide your amp and capacitor with separate grounds rather than utilizing the ground distribution block on the capacitor.

They help when you have a charging system that can keep up

I like to tell people alternator alternator alternator. In my case it's two stock 130 amp 3G alts. 2 mb quart reference amps strapped putting out 1600 watts rms. and I have 2 70x4 amps playing active biamped jl c5 components. I didn't have a problem with low voltage when I cranked my stereo I had a problem with the lights dimming when the bass would hit and the quick spike would come and go making my voltage gauge dance, and my lights would flutter. With the addition of two capacitors the voltage is much more stable. The amps take the power stored in the caps when it hits and the feed of power progressively rolls back in to charge the caps acting like a buffer. If your charging system can't keep up In the first place a cap will not help you.

Never backs down

I've sat in my car for almost 2 hours before with the car off, just blaring my system, and my battery was just fine. My lights don't dim when it hits and I'm pushing 3,000 watts into 2 JL's. This rocks, 5 of 5.

Very good, a little pricey though

This cap is truly one of the best. Built very solid, never had a problem of any kind with it. It is a little pricey, i think, for a 1 F. But if you want the best, and your system isn't too massive, go with this one.

Good product

Work as it should I haven't experienced any dimming win my lights it's a true 1farad cap. It has some weight to it so you know it's not chaplain made.

Quality Product

First off it does what it says and is a very solid cap kept my voltage steady and did improve on my bass sound quality the led voltmeter is also very nice. Its easy to install and will fit 0 gauge wire I charged it with a 12v car lightbult like the ones from the taillights.

Overall I would recommended this for small sound systems and to make your setup look better.

Fantastic Performance!

What can I say, this large beast (Don't be fooled by the battery appearance, it's about the same size as my biceps!) has done me well. Never skips a beat, sound is always crisp, clear and precise.

Features: It is a capacitor, has a little LED thing that shows voltage. Comes with capacitor installation kit so you don't turn your fuse box into the 4th of July.

Good Buy!

This Rockford Fosgate capacitor is a must have I own 2 for 2 different systems. Keeps lights from dimming, Two system at 1600 no problems at all!!

4 SURE WORTH IT!

I just got my system installed about 2 weeks ago and this really helps a lot. It maintains the cars voltage and keeps my 2 12" p3 subs going full tilt. Excellent buy.

Must Have!

This capacitor is a must have for any system! I'm running two amps off of it actually for ~700 watts RMS and I haven't had any problems. It's hooked in parallel with my system, connected to my distribution block and grounded to the frame. I didn't use the charger to charge it as it said. I just let it charge itself when I connected the battery back up. Just be careful, that's a lot of juice stored up!

Bastante bueno

Es de Buena calidad ,ademas es super facil de instalar

Great!!

Personally I never had a thing for capacitors. Unfortunatly due to a low budget, I couldn`t afford the "big three" or even a new alt... but Rockford does exactly what it`s supposed to do. The sound quality of my Type R is way better than it was. Completely cancelled out all the dimming too! I think people get the wrong impression about the capacitors... by no means should it make your sub louder. It's not a miracle machine its honestly a cheaper solution to fixing the issues that our unnecessary and booming systems throw at us! Not every one has the money to buy a beefy alternator or top of the line battery. Any way, like I said.. it does what it's supposed to and i highly recommend this product. Looks sweet too!

Nice capacitor.

I installed this capacitor with 4 AWG wire and an NVX BDA7501 amplifier (4 ohm load, 480 W RMS). The voltage meter readout uses an internal comparator to sense a voltage change, which then illuminates the meter; It is not controlled by the remote lead, and therefore cannot be controlled by the user. This may be important for those with a hatchback that don't want a bright display randomly turning on and off in the back of their vehicle. Works great in my trunk though! No complaints really, just a clarification of its operation.
Included charge circuit worked well, and it installed without any problems.

By Joel on January 2, 2020 Verified purchase

Does as advertised!

This product seems to perform as intended. I am satisfied with my purchase.

Soo expensive and now I totaled my old car now I have a new car need to wait and save money.

Soo expensive and now I totaled my old car now I have a new car need to wait and save money

By mason on January 26, 2020 Verified purchase

NVX XCAP1F

I cant say anything neg. or pos, about this product .install went great and everything is working well. I am not running a crazy amount of power just one lanzar opti hc 3502 and the main reason for getting a cap was just to support the overall electrical system. jeep/dodge are known for bad electrical issues. that being said we will see how long it last 1 month in now and no problems.

By brandon on January 22, 2017 Verified purchase

nice cap better price.

love it cut down on my light dimming greatly. i still had to do big 3 upgrade because i was runnin jl 1000/1 and 13 w7. great for systems under 1000 watts rms!

Great product !

Excellent, no more dim lights.

great product

I have a 500 watt alpine mono amp powering 2 rockford Fosgate 15 inch p1s wired to 2 ohms and this cap works great. Highly recommended

great cap

5/8/16. I bought this cap to help with my light dimming problem. I have a hifonics hfi 1000.1d. I had it wired at 2 ohms on a 12 cerwin Vega vmax. At 2 ohms my light stopped dimming. I then bought a 15 nvx to wire at 1 ohm on same amp. Let me tell you it hits hard. It helped reduce voltage drop, it helped stabilize my cars electrical system. Which reduces strain on your vehicle. But I will say at 1 ohm, when the bass is really hitting hard, my lights will dim slightly. Overall I'm satisfied with this product.

By Richard on May 8, 2016 Verified purchase

Great Price and Performs Perfect

A must to have when pushing Amps, especially with all the electronics... Lights don't dim when the bass hits.

Good Stuff

Works great and I love it. The only thing I did not realize is the digital readout never turns off regardless if you vehicle is on or off, so at night you can see a blue light coming from within the inside of my truck and its pretty bright. The only reason I do not like this is I have had my truck broken into and robbed, so I do not like the blue light attracting the unnecessary attention, but when I'm in sketchy places i just throw a shirt or jacket over the capacitor to block the light.

Great Product

I would strongly recommend this product for anyone needing this particular piece of equipment. It arrived as it was advertised, and has been working great since I installed it. It's a great choice!

Amazing

I have my kenwood amp pushing out 500 watts bridged mono and i use to dim my headlights and neons like no other. Since i installed this cap, my lights don't dim, i get more bass, and i get too many complements on how my set up looks with it next to my amp. The install was easy, painless, and charging it up was nothing. all in all, this cap is the cap you want.

Son loves it

Placed it in his mustang to help combat the dimming headlights. Works for that, he thinks it looks cool. Good deal.

Great buy!

I got this about a month ago and it is great easy install and stopped my lights from dimming

Good Purchase, no dimming lights!!

I was deciding between this NVX 1 farad and a Stinger 1 farad. I decided to go with this one because it was not only a better value but NVX brand like the amp(NVX JAD 900.5) I ordered. All of the NVX products have good reviews on SonicElectronix so I trusted them and decided to order. I am very happy with my purchase. This cap performs on the same level as Stinger Capacitors that I have owned in the past. I measured voltage at both outputs on my distribution block and voltage meter reads 14+ volts constantly. I have the NVX JAD 900.5 and a Rockford Fosgate P500x1BD connected to this cap. No dimming lights and system sounds very clean. I would definitely purchase this again if ever in need of a good 1 farad Cap. Thanks Sonicelectronix!!

By D. L. on June 2, 2016 Verified purchase

Works great.

Great product. I would not buy this thinking you are gonna stop dimming lights. You buy this to save your cars electrical system. Came with a great charging board. It doesn't light up when charging. So just wait for the light to go out before throwing your fuse in.. Great product. I'm running this on a Sony gsx gs100. Amp to 1100 watts on a regular p3 sub, with 2p3's on a soundstream amp with a stinger 5farad cap.

Great Cap!

I purchased the XCAP1F, by NVX, initially because my headlights were dimming when the bass hit. I am happy to say that the xcap did the trick. I would definitely recommend this product to anyone else having similar problems with dimming lights.

By Phil on August 16, 2022 Verified purchase

Awesome Product! WORTH IT!

My interior lights would dim whenever I would turn the steering wheel and felt like my car was going to turn off. This would only happen whenever I had the music/bass turnt up loud. I have two 12" JL Audio w3 with a hifonics amp 900wRMS @2ohms. I bought the NVX XCAP1F and never had a issue again. It even made my subs hit harder. I Definitely recommend this product. Set up was easy, the distributor block on top makes a difference. One thing I noticed is that when amp isn't drawing a lot of power, the blue LED voltage light will turn off. But as soon as you start to bass out, it'll turn on.

By DwOrD on July 6, 2022 Verified purchase

Sturdy

Great way to filter out any unwanted back feed from your sound system !

By Miko on June 6, 2020 Verified purchase

great product

i bought this nvx 1f capitor and i put it on a sundown 1,000 watt amp and with optima yellow top battrey and i have no volted drop the volts stay at 13 volts and high volume

By david on November 22, 2020 Verified purchase

Battery Saver

This is a must have piece of equipment for every stereo system that has an amplifier!!!! I always had an issue with my electrical system, until now. Now I have no issues at all in fact I my headlights dont dim and it feels like my bass has a harder hit to it, and I thank sonic for that !!!!

Rockford Fosgate RFC1D 1 Farad Capacitor

This is A GOOD name brand cap for the farad and price

By Vonsalee on November 27, 2020 Verified purchase

great capacitor

Great build quality. Been using Rockford for over 20 years and they never disappoint.

By Branden on May 27, 2020 Verified purchase

Very nice product

It looks really nice in my

By Andrew on November 28, 2024 Verified purchase

NVX XCAP1F TRU 1Farad digital capacitor!

Thank u sonicelectronicsThis capacitor is very good keeps my stuff at 14.2 it might dip a little bit not much and it helped out with other stuff in my car it keeps up with with my subs and amp it helps out way better than the ones I had in the past i’m running 2 Rockford Fosgate P3‘s with 1000 W stinger amp and a pioneer CD player and a scar equalizer and the Bose amp that’s in my car dang does it scream and bumps what do the kids call it it SLAPS!!! I like all music heavy metal, rap a tiny bit country but it keeps my car banging some times my ears are ringing after bumping so hard I like to fill my music not just here it
The only con is where I live if you want something nice you have to order it and shipping is not cheep
Up date after I charged my car battery to full man dose thiss thing help OMG!!!!! my 12 never hit so hard it’s making the needle on my RPM gauge bounce like crazy I might orde a nother one or just get the 10

By Dustin on January 8, 2025 Verified purchase

Caps are they worth it

I have to say there alot of cap on the market. And there all different brands. Are they worth it yes and no. If your borderline on your setup I definitely highly recommend having one and make sure there actually install right. If your way over what your alternator can handle then no it won't help. Connections on this is absolutely perfect there charge and discharge piece makes life easier than back olden days. It's design is perfect for what it's use is. My setup was small I figure what heck I give it a try haven't had headlight dimming problem or abnormal voltage drop.

By michael on December 7, 2024 Verified purchase

Great overall

Profuct is great! I would buy two of them if I needed another

Great Rockford Quality!

I’m a huge fan of Rockford Fosgate and my entire car audio systems is comprised of all RF equipment, right down to the wiring, with the exception of the head unit. This is just another piece of their great equipment. Great digital readout, easy to use and easy to charge with the accompanying charging tool. Along with that, it works great and also looks really cool too and Sonic Electronix price was better than any other competitor!

great customer service

Very helpful in helping me choose the right one for me and advice on hooking it up preciate all your help thank you

awesome for a 1 fared cap

I would recommend this to all my friends 2 of my friends bought this cap after they saw what it did for my system I have two amps on this a jbl with 300 rms and a fli audio amp at 600 rms and this thing handles them both no problem (pros) great power and look great in my truck (cons) none