T-Spec Capacitor

3.0-Farad capacitor with red LCD meter

Item #: 1203DDC

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15 Reviews

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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. 

T-Spec Capacitor Reviews

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T-Spec Capacitor

Written By Anonymous, Maryland on Monday, September 28, 2015

Crutchfield Customer Review (What's this?)

Very easy to install

Just what I needed

Written By Joey, North Dakota on Saturday, September 05, 2015

Crutchfield Customer Review (What's this?)

My system kept shutting off, and this has prevented that completely. Would highly recommend. Easy installation

cool product

Written By Blackstarr617, Massachusetts on Monday, August 31, 2015

Crutchfield Customer Review (What's this?)

Inexpensive addition to make my system complete, plus system bangs with little to no power drain

Pros: Price,look

Cons: None

This product kills it!!!!

Written By G31e, victorville on Monday, June 08, 2015

Crutchfield Customer Review (What's this?)

Awesome product took care of all of my dimming problems.

tspec 3 farad capacitor

Written By bones, Maine on Monday, May 11, 2015

Crutchfield Customer Review (What's this?)

works awesome lights don't dim subs get the extra power they need when they need it


Written By Nick M., Anchorage, AK on Monday, April 20, 2015

Crutchfield Customer Review (What's this?)

So I have upgraded my stereo a few times replacing parts and pieces to get everything just how I want it, never really put much thought into the power cap beyond whatever was cheap. Holy cow what a difference spending a few more dollars makes. This thing is great! Supplies all the power my subs need when they need it, which is really great since I don't have the room in the truck cab for a second battery and I didn't want to buy a super spendy alternator. I would highly recommend.

Pros: Looks great, works great.

Cons: I haven't found any!

T spec

Written By Nik, Mishawaka in on Friday, April 17, 2015

Crutchfield Customer Review (What's this?)

Hasn't worked yet not sure what I did wrong during installation but it turns on and off randomly

Pros: Nice easy and small

Cons: Hasn't worked properly yet

Crutchfield response on Monday, April 20, 2015 We forwarded this review to our Technical Support team for follow-up. Lifetime tech support comes with every Crutchfield purchase.

T-Spec Capacitor

Written By Jeromy, Chicago, IL on Thursday, October 16, 2014

Crutchfield Customer Review (What's this?)

Affordable and efficient.

Pros: Easy to hook up and helps a lot when needing the extra juice.

Cons: Installation recommends 5-20 sec pre charge with the included light bulb before connecting. I believe it needs much longer to prevent an arc happening. Perhaps 2 min.

power when needed

Written By Stan, Michigan on Friday, August 15, 2014

Crutchfield Customer Review (What's this?)

Deffinitley worth the money. I have had multiple capacitors and none of them were really that effective at controlling voltage regulation. Then i got this one and it delivers evertime its needed.

Pros: appearance. installation. quality.

T-Spec 3 Farad Cap

Written By Ed, LA on Thursday, July 31, 2014

Crutchfield Customer Review (What's this?)

So far this is the one component I haven't had some type of problem with. Been in use for several weeks now and I haven't noticed any symptoms of reduced voltage like headlight dips. Person that helped me install the power amp said he had never seen a cap charge up so fast as this one.

Pros: Appears to be performing it's purpose successfully. The only component I haven't had an issue with so far.

Cons: None so far.

it works

Written By kcurtsinger, spring Texas on Tuesday, July 15, 2014

Crutchfield Customer Review (What's this?)

The product is fine and works. The only complaint is the bolts that hold down the wires won't tighten down properly. Its like they were stripped when I got it!!

Pros: Looks good and helps the lights

Cons: The screw downs are crap!

t-spec 3.0-Farad capacitor

Written By Juan, Santa Ana on Tuesday, July 08, 2014

Crutchfield Customer Review (What's this?)

Worked well lights still dim but at higher volume checked alternator and its going south so need to replace it. Hopefully after that all will be good.

Pros: Has 2 terminals for power and ground no need to buy a distribution block to install

Cons: none

T-Spec Capacitor

Written By Anonymous, IOWA on Friday, March 14, 2014

Crutchfield Customer Review (What's this?)

Received it with manufacturer packaging old and falling apart. No glue to keep plastic window in place and would've been a good product I think. Bulb was shattered upon arrival. Crutchfield handled my return great and got a full refund.

Cons: Packaging


Written By Dvargas1123, South Plainfield, new jersey on Saturday, February 15, 2014

Crutchfield Customer Review (What's this?)

My headlights still dimmed, however I had a 1 farad cap on earlier which would drain and shut off my amp, so I had to upgrade to the 3 farad, no longer turned off, so that's a plus. I recently blew my inline fuse however so that's where I'm at now

Pros: No longer drains and shuts off amp

Cons: Headlights continue to dim

T-Spec Capacitor

Written By Anonymous, Lewis Center, Ohio on Sunday, October 27, 2013

Crutchfield Customer Review (What's this?)

Does everything that is says stops headlights from dimming would definitely recommend to anyone.

Cons: none

Hands-on research

What's in the box?

Download owner's manual

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

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.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

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