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Boss CAP3.5S (SILVER)

3.5 Farad Digital Capacitor (CAP35S)

Discontinued
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This item has been discontinued

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When heavy bass notes in your music hit, the current demand on your system greatly increases and could cause voltage drops. This stiffening capacitor acts as a power reservoir, instantaneously supplying added power to keep your system playing strong.
  • 3.5 Farad Digital Capacitor
  • Color: SILVER
  • Digital voltage level display
  • Chrome finish terminals
  • Includes mounting brackets
  • 20V DC
  • 24V Surge
  • Dimensions (without mounting brackets): 11"L x 4"W x 4"H
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

Product History:

Boss CAP3.5S thumbnail
(newest, current model)
Boss CAP32C thumbnail
(previous model, replaced by Boss CAP3.5S (SILVER))

Capacitor Specifications

Capacitance (farads)
Capacitors are rated in farads, and at times microfarads or millionths of a farad. The more farads the capacitor is rated at, the more electrical charge (and wattage) the capacitor will hold. Capacitance is defined as the property of storing an electrical charge between two separate conductors.
3.5 farads
LCD Meter Display
Displays the current voltage and/or other specification on an LCD readout.
Yes
Maximum Input Gauge Size
This is the largest gauge wire that will fit into the power and ground terminals of this device. The lower the gauge number, the thicker the wire is. For example, a 4 gauge wire is thicker than an 8 gauge wire and thus has higher current carrying capacity. Always do your best to get this size wire to reduce the risk of damage to your components.
Any Gauge with use of Ring Terminal AWG
Maximum Output Gauge Size
This number refers to the maximum size of wire that will fit into the output connector(s) of the capacitor, battery terminal, or any other connector with an wire output.
Any Gauge with use of Ring Terminal AWG
Built-In Distribution Block
A built-in distribution block simply means that the item includes a distribution block. The built-in distribution block will split the single power input into a multiple power output.
No
Primary Color
This is the main color of the item.
Silver
Illumination
This is the color of the illuminated LED lights on the unit.
Red
Width
The width of the item from left to right (side-to-side) measured in inches.
4"
Height
The height of the item, measured from top to bottom, in inches.
4"
Depth
The front-to-rear depth of the item, in inches. If the item is angled or slanted, this value is the bottom measurement.
11"

Specials with this Item

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Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
55%
4 Star
18%
3 Star
18%
2 Star
9%
1 Star
0%

Average Attribution Rating

Durability
4.2
Value
4.2
Features
4.1
Design
4.7
Usability
4.6

gony

mcallen texas

Overall
Durability
Value
Features
Design
Usability

great value

October 10, 2012

Recommended seller because its really good seller, on time and priced really good.

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Just-a-Fool

Shingle Springs, Ca

Overall
Durability
Value
Features
Design
Usability

This Boss Cap rocks

August 5, 2012

I have an Alpine 1400 Watt RMS system in a boat connected to an Isolated Kinetic 2400 Battery. I wanted lots of battery time so the boat could just sit and play without worries. Well the boat rocks. I only have a 55 amp alternator and have not upgraded the main battery wiring. Yes I have a monster battery isolated from the main system by manual switch. I have let the boat sit with the stereo cranked full volume for 6+ hours at a time. Frankly I have never yet drained the Kinetic when doing this. I have this Cap inline in the power very close to the Alpine PDX-1.600 that pushes the Alpine Type R sub. The Cap has a volt meter on it that is very useful and a little light that lights every time the Cap is handling the power deficiency. It works great. I have seen this system drop to 11.4 Volts and still pound hard due to this Cap. As my Kinetic battery starts to drop in voltage this cap goes to work and the Sub-Woofer is never even affected by it. The whole set up works beautifully and this Cap does its job perfectly. Very Happy with the results of this system.

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eman

austin,tx

Overall
Durability
Value
Features
Design
Usability

A++++

June 14, 2012

Great product!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! I would totally purchase from you again. Thank you.

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Brad

Cleburne, TX

Overall
Durability
Value
Features
Design
Usability

Good Product

May 27, 2012

Ive been installing & sellng car audio for 10 years and I recommend this product. This cap has a great value and works like i'ts supposed to. However if youre running small gauge wire and a high wattage amp, this is only a band aid for your system. If you have a good battery, upgraded wiring and a good alternator you dont really need a capacitor.

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JG

Colorado

Overall
Durability
Value
Features
Design
Usability

Good product

May 7, 2012

The boss cap was a great buy and I recommend it. I have had it for 6 months now and so far it has functioned great. This cap did not take any dimming away which disappointed me there but I found out it could possibly be my alternator, but I don't think it's exactly that. I did notice it gives your subs more power/bass which is phenomenal.

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Nalda

East Orange, NJ

Overall
Durability
Value
Features
Design
Usability

Excellent product

April 21, 2012

I am extremely satisfied with this product. Both the installing technician and other technicians are going gaga about it. Everyone wants to know where did I get it. I would not hesitate to recommend it to anyone.

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whatever

place

Overall
Durability
Value
Features
Design
Usability

it alright

January 2, 2012

My 1 farad cap does better than this but its still okay.

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TK

Apple Valley, CA

Overall
Durability
Value
Features
Design
Usability

great capacitor

October 18, 2011

I'd reccomend this because it stiffens your bass hits and is quite affordable for being a 3.5 farad.

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Alon

Columbus, OH

Overall
Durability
Value
Features
Design
Usability

Good for the price

April 17, 2011

Okay first a background on what I use and what is the sound system. I have a Jeep Liberty 2003 sport 3.7L w/ 4WD and I ripped out my stock system entirely (except for in-dash tweeters as the tweeters are good quality). My system is a Kenwood 8105D 1000 watt amp powered with 8 gauge wire, and 2 12" Kenwood subs connected with 10 gauge wire. The capacitor kept gauges and lights from dimming, however seemed even 3.5 farads was not good enough as I listen to bass heavy techno and hip hop and a lot has constant bass. So after a couple minutes at Max or 90% volume, the cap would be drained and cut out to recharge. But that might be more my music selection. It does make the signal cleaner however and more responsive. However I decided to buy the Boss 10 farad capacitor to get more capacitance for my needs and will give this to my buddy who helped me install my system as he only has 2 x 200 watt rockford almost 20 year old amps and 2 10" kicker competition subs that are also almost 20 years old... They were his dads while he was in the USAF and he had them still sealed and never used. So I would recommend this to people with not too powerful systems if you are like me and like songs with constant bass hits like techno commonly does or some hip-hop/rap

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Will Stickle

nashville, TN

Overall
Durability
Value
Features
Design
Usability

Ok product

January 21, 2011

I bought this product for only a 1200watt amp. I bought it for intended upgrade on amp and subs in a few weeks. It did take care of some of the dimming on my car but not all the way. I know caps cant fix everything but this thing did work and looks good to after a good install. If your looking for a decent cap on a budget go with this one.

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Jesse

Mount vernon, OH

Overall
Durability
Value
Features
Design
Usability

ok

December 29, 2011

Works if your system is under 3000 but not the best and it wines extremely loud with the RPM's of your car.

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Accessory Tools and Products

Accessories added

Scosche Ring Terminal (1/0 AWG)

Pair of 1/0 AWG ring terminals with 3/8" hole and red and black insulating sleeves.

Your Price $3.99

NVX Precut Power/Ground Wire (1/0 AWG)

5 ft. of NVX's HyperFlex power/ground cable with high-current transfer and gunmetal gray insulation.

Your Price $29.99

NVX XW0BL20

20 Ft Pre-Cut Piece of 1/0 Gauge EnvyFlex Power or Ground Wire

Your Price $84.99

Directed DEI Resistors (15-Pack)

Pack of resistors with various values (ohms) perfect for the initial charge of your capacitor.

Your Price $1.99

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Product Summary

Manufacturer

Model Number

CAP3.5S

UPC

791489108904

Weight

6.00lbs

Internal SKU

cap3-5s

Internal Product ID

13128

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Boss CAP3.5S (SILVER)