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T-Spec Capacitor

3.0-Farad capacitor with red LCD meter

28 Reviews | 11 questions - 39 answers

Item # 1203DDC

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Our take on the T-Spec Capacitor

Smooths out the bass

T-Spec's 3-farad capacitor will help your vehicle's charging system keep up with your high-powered sound system. When the power of the bass threatens to overwhelm the electrical system, this cap quickly provides a jolt of stored power to keep the beat pounding and your headlights from dimming. And it recharges quickly, so it's always ready for the next hit.

Displays the voltage

A bright digital meter displays your system's voltage, so you can monitor how things are going and avoid overtaxing your vehicle's charging system. We recommend this 3-farad cap for sub amps delivering up to 3,000 watts RMS. Distribution-type connections on its top simplify the wiring of the capacitor and your amplifier. Warranty: 1 year. 

My main goal was to have people to have people roll their windows up in traffic and have businesses and establishments Windows shaking and with this compacity I have succeeded 10 Stars if I could give it to you

Anonymous, Denver co

What's in the Box:

  • 3.0 Farad capacitor
  • 2 Polycarbonate mounting brackets (installed)
  • 5mm Allen wrench
  • 4 Self-tapping screws (5/8" length)
  • Resistor bulb
  • User's Manual

T-Spec Capacitor Reviews

Average Customer Review(s):

(28 Reviews)
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Hands-on research

Product Research


Overview: This T-Spec v8-series digital capacitor will improve the performance of your car's electrical system by acting as a buffer between the alternator and your amplifier. Stored energy from your car's electrical system is held in the cap and quickly released to the amplifier when needed. High current demand occurs when the music you are playing contains a loud, transient, deep bass signal.

Capacitance: This T-Spec v8-series digital capacitor has a rating of 3.0 farads. While you can never have too much capacitance, it is recommended that you use a capacitor with a minimum of 1 Farad for each 1000 watts of amplifier power.

Distribution Top: The capacitor features an impact-resistant polycarbonate distribution top with two 4 AWG positions on the positive (+) side and two 4 AWG positions on the negative (-) side. You can use 4 AWG or 8 AWG wire when wiring the capacitor into your system. The power/ground wire connections have set-screw terminals that can be tightened/loosened with the supplied 5mm Allen wrench.

Voltage Meter: This capacitor has a digital voltage meter on the top to help you monitor your electrical system's performance.

Reverse Polarity Protection: If the capacitor is wired incorrectly, you can damage your equipment or electrical system. To prevent this, the capacitor has an internal relay system which disables the capacitor and triggers a buzzer to sound.

Resistor Bulb: The capacitor comes with a resistor bulb which is used when initially charging the capacitor, and to discharge the capacitor when removing it from the system. You should keep the resistor bulb in a safe storage location when not in use.

Mounting System: The cap comes with a simple mounting system that lets you mount the unit vertically or horizontally, using the four supplied self-tapping screws.

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Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

For amp [ SHANNON  May 31, 2017 ]
To proctect my battery [ CONRAD B  May 12, 2017 ]
replacement for existing that finally pooped [ Kirk  Apr 23, 2017 ]
sleek design [ Sean  Mar 29, 2017 ]
After Alpine X009, 1-Alpine R10 Dual 4 Ohm, and Kicker 1000.1 were installed, my voltage drop was excessive. I have dimming lights and the cruise control will even kick out when hard bass hits. I am unable to push the system very hard at all without the amp going into protection mode, which I believe is from the voltage dropping below 11.9 at the amp. HO alternator has already been replaced. [ Joshua  Feb 23, 2017 ]
To fix a lighting solution with my amp and sub install [ Kevin BigDawg  Jan 08, 2017 ]
Good reviews and good price [ ADRIAN  Dec 30, 2016 ]
Excellent power cap for the money, has performed well and continues to amaze. [ Nicholas  Dec 16, 2016 ]
the reviews were great [ E  Sep 13, 2016 ]
I'm adding a 5 channel amp to my toy hauler and want to have consistant power to the amp. [ CHRISTOPHER S  Jul 11, 2016 ]
It had the most farads. [ Chris  May 29, 2016 ]
It was suggested due to the type of amp that I purchased and to protect the vehicle. [ Lanell  May 06, 2016 ]
Capacitor helps keep my voltage at a constant 12V+ throughout power distribution [ Gerardo  Mar 21, 2016 ]
Power supply needed for my mustang system [ BRENDA NADINE  Mar 20, 2016 ]
Necessary for power to always be provided to the subs without drawing from the car unnecessarily [ Matt  Mar 11, 2016 ]
Great price, don't want head lights to dim anymore. [ Ryan  Mar 11, 2016 ]
Good reviews [ Devin  Mar 09, 2016 ]
Little extra peace of mind knowing I'm not over stressing my electrical system in my truck [ Chad  Mar 03, 2016 ]
friend has the cheaper option by this company, and he doesn't like the terminals. so I went with this one. [ benjamin  Mar 03, 2016 ]
Trying to keep my light from flashing when my radio runs. I had a company professionally install a extra battery. It got better but didn't solve my issues. Hoping this does the trick. So far I have had great luck with Crutchfield and there reviews. Thank You. They have Great service also. [ Richard  Feb 28, 2016 ]
because i need it [ Anita  Jan 23, 2016 ]
Brand and would accommodate my needs [ Donald  Dec 03, 2015 ]

11 questions already asked

Yes, price matter, qurstion how much farad do you need? are you over 6 fared for your component? that's why you need multiple capacitor? Hosnestly there is more fared you can get i single capacitor now and price less expensive .. you can check Boss brand and they do carry up to 10 Farad ( single Capacitor ) and price less than $60.00 i using Boss capacitor right now ( downgraded to 1 farad [ CONRAD B  May 05, 2017 ]
Higher cost one use better quality in most cases but both should work the same if both have same spec. U should check the reviews on them before choosing. [ damen  May 05, 2017 ]
Your right these are quality. 2 should do it if your running a hard system. Thanks [ johanna  May 05, 2017 ]
It helps but I also had to upgrade my battery. [ KATHERINE  Oct 10, 2016 ]
Yes, a power cap will help with lights dimming, I installed this in my truck to fix lights dimming. [ Nicholas  Oct 10, 2016 ]
no it does not help. although it does make bass hits more crisp, you should upgrade your alternator [ carol  Oct 10, 2016 ]
It definitely shouldn't have your lights dimming. I have a jl 1000 mono amp with 2 12"high class kicker subs... And my lights barely dim at all. Definitely a great capacitor! [ Dedrick  Oct 10, 2016 ]
No, this capacitor is designed for a 12v system. A 24v system would overload it and cause some serious consequences. Ex. The capacitor could cause a fire or possibly even explode. [ christopher j.  Jan 04, 2016 ]
No it doesn't. It turns on when ever battery voltage and capacitor voltage differ as far as i know. Mine is always on when radio on. When radio turns off stays on for alittle bit then turns off [ Juan  Dec 08, 2015 ]
No remote wire. Yeah mine does the same thing with the engine it turns on when it gets a big draw from your amplifier. It a good cap [ steven  Dec 07, 2015 ]
Probably it's fine, I'm sure there's specifications somewhere if you want to make sure. I used it with a single Alpine PDX-V9, which is a 4X100W + 500W sub amplifier. [ Troy  Oct 20, 2015 ]
you can never have to much cap I have two amps one 1100 alpine and a 1200w kicker and 2 12" alpines and the cap worked perfect [ THOMAS  Oct 18, 2015 ]
I Don't see why not.. no the bigger the cap the better.. it will help your car run as well because it draws energy from there first then you're battery [ NATHAN J  Oct 18, 2015 ]
Probably will help. But it's not a substitute for a high-output alternator [ Troy  Sep 05, 2015 ]
Alpine 1,100 watt amp with one kicker L7 with the tspec 3.0 cap. Took care of the dimming on my car. So it should be more then what i need and more is better you know what i mean. So yes it will help you with the dimming. [ GARY C  Sep 01, 2015 ]
IT will help but if your dimming is bad it won't fix it... just make it a little better. [ NATHAN J  Aug 31, 2015 ]
It helped on the dimming of my JK. Didn't completely go away but helped [ CURTIS  Aug 31, 2015 ]
I too bought this to try and help with the headlight dimming and it did not work. I also bought a optima yellow top battery to try and help but that to didn't work. In order to prevent dimming, you must upgrade your alternator, battery and power grounds. [ PAUL ROGER  Aug 31, 2015 ]
Yes, this capacitor will be more than enough for that size amplifier. It is rated to handle up to a 3000 watt amplifier or combination of amps adding up to 3000 watts. I have mine wired in parallel to another capacitor to handle my 3600 watt amp and it does a great job. [ Ray Albert  Aug 31, 2015 ]
yes or you will have to recharge it [ FRANKLIN  Jun 11, 2015 ]
you do not have to have it connected all of the time. Putting a cut off switch is perfectly fine. When the capacitor detects a change in battery level, it will automatically activate and fill itself with stored energy. Switching the unit off will not hurt it at all. [ Ray Albert  Jun 10, 2015 ]
You would need to charge the capacitor before you install it. Mine is constantly getting power from the car battery, I believe there's an automatic shut off. This is deffentlly and auto electronic and not sure how it would work with your marine application. [ PAUL ROGER  Jun 10, 2015 ]
I leave mine hooked to the battery at all times but you don't have to.. I just know that if it's for a long time you'll need to discharge it. I'd ask the manufacturer to be sure. [ NATHAN J  Jun 10, 2015 ]
Yes, mine is hooked to the battery but cuts off with the ignition after about a min. [ Berdale  Jun 10, 2015 ]
You can if you like i would wire a 4 or 0/1 wire from the battery to a fuse in the engine bay then to the capacitor positive terminal. Then two wire from the capacitor positive terminal one for each amp. Ground the amps and capacitor with their own ground wire to the cars bare metal surface. the closer the capacitor is connected to the amp the better also the shorter length of ground wire the better hope this was help full. [ KERTTON  Apr 30, 2015 ]
not recommended [ FRANKLIN  Apr 30, 2015 ]
I do believe u can,i wouldnt go with too big of amps on 1 cap.i am gonna have 2 on mine but a 400watt and a 500watt only.not sure if i would hook 2 1000 watt amps to it...its hard to explain in words how to wire your application,but i am just gonna jump cont.power,power(red),and ground(black) amp to amp [ JERRY  Apr 30, 2015 ]
you can, just make sure the capacitor is evenly matched for the two combined amps. Wire to the first amp then put an extra set of cables on the capacitor and run those two to the other amp power inputs. Each side of the cap will resemble a y shape. From the battery is the leg of the y. Two tips of the y to each amp. The capacitor would be the intersection of the y shape. Hope that helps [ Ray Albert  Apr 30, 2015 ]
Well if you already have the two amps wired all you need to do is splice in the cap before where the wire splits for the two amps. Year it's possible but you'll need a splitter if you don't have one already. [ NATHAN J  Apr 30, 2015 ]
yes It is for standard 12 volt systems [ DONALD G  Dec 03, 2014 ]
This is a 12 volt capacitor. the display shows voltage in battery and with engine running will show @13.5 to 14 due to the alternator. [ IRA  Dec 02, 2014 ]
Yes you have to use the resister supplied to do the first charge and then leave hooked up to a 12 volt batt [ FRANKLIN  Dec 01, 2014 ]
I waas just wondering because I thought some systems run using 14volts. [ dougie  Dec 01, 2014 ]
12 volts as in battery power? [ George  Dec 01, 2014 ]
Yes - This capacitor works fine at 12v. It appears to perform well over the range of 11.5v to 14.8v, which covers operating from battery power (car turned off) as well as from regulated alternator power (car running). [ Anthony  Dec 01, 2014 ]
Yes it's meant for 12 volt systems. The capacitor stores energy for when your amp needs more punch, and your alternator just can't stand up to your amp's request. [ Ray Albert  Dec 01, 2014 ]
It is for a 12 volt system. When your vehicle is running you should see between 10-14 volts on the capacitor. [ MICHAEL  Dec 01, 2014 ]
It's approximately 3.5 inches diameter (it's cylindrical), and close to 12 inches long. I'm not close to my vehicle right now but I think these are very close approximate dimensions. [ Ray Albert  Jun 05, 2014 ]

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