**UPDATE** - Here we are almost 2 years later. (Normally with the PCX models, they would have FAILED, into permanent circuit protect by 6mo to 1yr)... NOT THESE... I bought a 2nd one for backup, and it's been collecting dust in my attic, cuz THIS CAP IS THE TRUTH! I honestly have more voltage, 14.7 , than when I first installed it.NO strain on my alternator, and only 1 battery replacement in this 2yr period! Caps will usually KILL a battery unless isolated by a relay, and stress your Alt. NOT HERE.. battery had a dead cell... alternator tested just as strong as a new one! Can I give this 6 stars?? This company should have me do a video for them, cuz I see nothing but PRAISE deserved for them. I could NOT be happier thanks to them! If this is available still, stop thinking and BUY IT! Of the 100+ Caps I have EVER owned, this has been the BEST performing, longest lasting, and TOUGHEST one hands down.** (Oh yeah I almost forgot..Never ONCE been into "protection mode!" --- God of Caps under $200!)** Let me start by stating, ive ALWAYS provided an honest and unbiased review here and everywhere i post a product review! So heres my analysis of this Boss 18cap, 18 farad capacitor. Overall? A+ ... NOW... lemme point you to a few indisputable facts about this product. #1. Any novice or pro level car audio or electrical consumer will realize this is NOT 18 farads... in reality its closer to between 5-8 farads. You can test it with whatever meter you want, but the way these are built (Hybrid Capacitors) is a combination of a standard 2-5 farad stiffening cap tied down to an additional circuit board with 8 separate high voltage rail caps much like those found in the Brazillian amps these days. Im not an engineer but the basic expl. Is that the board allows the main cap to exceed its normal storage capacitance by having these smaller caps recharge it much faster and thus creating a virtual bank of reserve power in a loop. #2. Dont be fooled... if you have owned the Power Acoustik pcx30, Planet Audio 20f, or several others that "Resemble" this (look at the connections, not the outside case) then you are correct, YOU DID OWN THIS! its the same cookie cutter design including the pcb board and voltage display. The one thing that sets this apart from the others is that THIS ONE the 18cap uses MUCH LARGER stiffening caps than ALL the rest! That 1 factor makes this SUPERIOR to the other clones. These caps themselves are nearly the same as the 4.4 and 5 farad Rockford caps which were phenomenal. So theres 2 of those to drive the build. Now for power. I am a pro builder and have been for 20 years. Capacitors have their place in audio IF USED CORRECTLY!. *NOTE: If you are trying to make a stock Acura Integra run a true 5k watt amp with 4 15's (eye roll) please leave this page and find your local alternator shop and get your electrical upgraded to a 300a or higher alt., get your Big 3 done, and load a couple XS batteries behind a relay! This will not help you!* **NOW.... if you are in my boat, (ex.) I have a 2020 Honda Crv which is under a spectacular warranty, and ANY modification to stock electrical will VOID my whole warranty, unless honda installs it. I can ADD anything i want but i cant remove anything. The honda CRV comes with a stock 90-120a alternator, but the electrical is maintained by less than 1/3 of that. I am running 2 Rockford T2d212, (1000 rms each) and a Brazilian 3k amp (tested at 3375 rms @ 2 ohms) plus an active EQ and Crossover. Ive got big 3 done, and all OFC 0 gauge run to the back. My voltage sat resting at 12.4 and 14.4 driving. Without the cap, i could hit some mid bass notes (the ones that drain voltage 45-55hz) and if at a light, i could nearly shut the car off if i was at 1/2 tilt. That said, an alternator was not an option (warranty void). Ive tested several of these hybrid caps and out of the ones mentioned above and some others... THIS ONE is the only one that proved helpful!. With this, my resting voltage is 14.5 and my driving voltage is 14.7. I can be sitting at a stop light with headlights on, AC blasting, system at 1/2 tilt, bass knob cranked, windows THROBBING and every car around me PISSED and my voltage MIGHT touch 13... never below 12 unless i am near blowing my subs. Final thought. WE HAVE A WINNER. Excellent design.. small footprint... supplements the variable juice needed to carry my system without invading my warranty commitment. Dont look further... start here.. you will not be disappointed. ***MAKE SURE U CHARGE THE CAP FIRST!!****

This thing is awesome. Totally saved me on power Serges.

I will recommend this product to everyone on a budget it has kept up with some amazing systems I've had over the last few years 10/10

Bigger than I expected but it does the job well.

Very nice. Has dual positive and dual negative inputs. Looks cool when powered up.

Since first installing this I have had nothing but problems. I followed the instructions to precharge the capacitor; I received No digital display readout. The digital readout only started once I hooked up the positive wire running from the battery (last hookup). For whatever reason the digital readout has only worked sporadically ever since.Twice, I went to start my car and found that my 1-year old car battery was completely dead. I learned that the capacitor continued to drain my car batter after the car and stereo and everything was off, and off for HOURS. I then rewired the recommended setup of the remote cable to run straight to my amp and then double over to the capacitor. That seemed to somewhat solve the problem for about 3 months.Additionally, when my car has a lot of electrical circuits all working at once--defrost, heated seat, rear defog, headlights, or windshield wipers, and stereo on low--I notice that my headlights are dimming or my turn signal is weak like the capacitor isn't doing it's job. Ironically, that is WHY we buy the capacitor in the first place--to solve this issue! So, again, further evidence that my capacitor wasn't working properly from the beginning.Finally, periodically, I go to start my car and it starts really hard and low and slow like the battery is near dead. But, luckily it still starts, and because this only occurs periodically I ignore the problem. Well, yesterday, I went to start my car and my car battery was dead AGAIN, for the 3rd time since installing this capacitor 4 months ago.I jump-started my car and immediately unhooked this complete P.O.S. capacitor and my car seems to start and run just fine again. Ironic.Point is, this capacitor is nothing but a useless lug and succubus of the energy of your poor car battery. Unfortunately, it took me 4 months to figure this out. Now, I am past the point of 90-day return.This is a cheaply made product intended to fail, and thus a terrible investment. Don't buy it. Please.

Added this in on a 2500w dual 12" subs set up in my daily driver. Works as it should and gave me some wiggle room with tuning. My lights still dim a little bit, but that's other things that need upgrading. Looks nice too! Worth the buy. Will reduce light and cut out by a noticable amount.

Good for lows so battery doesn’t drain

Livraison rapide

non mi a soddisfatto non era funzionante non si caricava si è surriscaldato molto facendo saltare il fusibile rischiando di prendere fuoco il cavo.

This worked exactly for what I needed it for, so no complaints. It looks really cool with the blue lights on the top and I always get compliments everytime I open my trunk. Prevents my battery from dropping volts when the bass is turned up.

Alimente 1 ampli 1x1500W rms, frôlant les 100A, et un plus petit 4x50W rms de 50A sans problème...

muy buen producto cumplio mis expetactivas