---
product_id: 282068454
title: "BOSS Audio Systems CAP8 Car Capacitor - 8 Farad, Energy Storage, Enhanced Bass From Stereo, Warning Reverse Polarity Tone, Voltage Overload Low Battery Voltage Led"
brand: "boss audio systems"
price: "€ 205.92"
currency: EUR
in_stock: true
category: "Boss Audio Systems"
url: https://www.desertcart.fr/products/282068454-boss-audio-systems-cap8-car-capacitor-8-farad-energy-storage
store_origin: FR
region: France
---

# 8 Farad ultra-fast energy reserve Enhanced bass stability & power delivery Super bright blue LED voltage display BOSS Audio Systems CAP8 Car Capacitor - 8 Farad, Energy Storage, Enhanced Bass From Stereo, Warning Reverse Polarity Tone, Voltage Overload Low Battery Voltage Led

**Brand:** boss audio systems
**Price:** € 205.92
**Availability:** ✅ In Stock

## Summary

> ⚡ Feel the bass, not the lag — power your ride like a boss!

## Quick Answers

- **What is this?** BOSS Audio Systems CAP8 Car Capacitor - 8 Farad, Energy Storage, Enhanced Bass From Stereo, Warning Reverse Polarity Tone, Voltage Overload Low Battery Voltage Led by boss audio systems
- **How much does it cost?** € 205.92 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/282068454-boss-audio-systems-cap8-car-capacitor-8-farad-energy-storage)

## Best For

- boss audio systems enthusiasts

## Why This Product

- Trusted boss audio systems brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Safety First:** Audible alerts for reverse polarity, voltage overload, and low battery protect your system
- • **Built to Last:** 3-year warranty ensures long-term reliability and peace of mind
- • **Power on Demand:** 8 Farads of rapid energy storage for thunderous bass without dropouts
- • **Sleek & Compact:** Slim 9x6x2 inch design fits seamlessly in any car setup
- • **Smart Voltage Monitoring:** Precision LED display (+/- 0.1 V) keeps you informed in real-time

## Overview

The BOSS Audio Systems CAP8 Car Capacitor delivers an 8 Farad energy reserve that stabilizes power flow to your amplifier, ensuring consistent, punchy bass and preventing voltage drops. Featuring a super bright blue digital LED voltage display accurate to ±0.1 V, it provides real-time monitoring and audible warnings for reverse polarity, voltage overload, and low battery. Compact and durable with a 3-year warranty, this capacitor is engineered to elevate your car audio experience with professional-grade reliability.

## Description

view largerWhat is a Capacitor?A capacitor is a passive (it consumes, but does not produce, energy) two-terminal electrical component. In building a sound system for your car, you would want to use a capacitor for a couple of different reasons.Why Do I Need One?The main reason a capacitor is always recommended is for power reserve. The capacitor stores energy and releases it very quickly to the amplifier(s).How Does This Help?Music is dynamic, no matter what type you listen to, and the dynamics can vary quickly, going from soft voices to thundering bass notes. These moments are where the benefit of having a capacitor is heard. The amplifier requires a constant amount of steady power to function efficiently and power the speakers. A capacitor will keep the power going to the amplifier consistent and stabilized, which means a better-sounding system.Important: The remote output of the head unit is connected to the remote turn on of the capacitor. The capacitor will not function if the remote wire is not connected to your head unit.Specifications Model 2 Farad 3.5 Farad 4 Farad 8 Farad 30 Farad Color Dimensions (L x W x H) CAP2B • Black 3" x 3" x 10.30" CAP3.5B • Black 4" x 4" x 11.37" CAP3.5S • Silver 4" x 4" x 11.37" CAP4C • Chrome 4" x 4" x 11.37" CAP8 • Black 9" x 6" x 2" CAP30 • Black 11.38" x 7.25" x 3" What's in the BoxOne pair of mounting brackets2 ring terminals2 spade terminalsMounting screws1 resistor1 Allen wrenchInstructionsInstallationPower up proceduresPower down and removal

## Features

- 3 Digit Super Bright Blue Digital LED Voltage Display
- Audible Warning Tone for Reverse Polarity, Voltage Overload and Low Battery Voltage.8 Farads with digital voltage display
- Voltage Measurement Accurate to + / - 0.1 VDC
- Automatic Sleep Status When Volume Is Low Or There Is No Voltage Variation Present
- Capacitance: 8,000,000, Working Voltage: 16 VDC, Surge Voltage: 24 VDC.Equivalent Series Resistance: 0.015 Ohm @ 100 Hz / 25 C, Capacitance Tolerance: + / - 10%.Dimensions: 9 x 6 x 2, Unit Weight: 5.3 Lbs.3 Year Warranty

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001DXAVTS |
| Brand Name | BOSS Audio Systems |
| Capacitance | 8 Farad |
| Capacitance Tolerance | 10 |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,253) |
| Equivalent Series Resistance | 0.02 Ohms |
| Global Trade Identification Number | 00791489108973 |
| Included Components | Capacitor |
| Item Dimensions W x H | 5.1W x 15.2H centimeters |
| Item Shape | Rectangular |
| Item Type Name | BOSS Audio Systems CAP8 Car Capacitor - 8 Farad, Energy Storage, Enhanced Bass From Stereo, Warning Reverse Polarity Tone, Voltage Overload Low Battery Voltage Led |
| Item Weight | 3.7 Pounds |
| Manufacturer | BOSS Audio Systems |
| Material Type | Nickel |
| Maximum Storage Temperature | 25 Degrees Celsius |
| Maximum Voltage | 24 Volts |
| Model | CAP8 |
| Mounting Type | Rack Mount |
| Number of Items | 1 |
| Operating Voltage | 24 Volts |
| Part Number | CAP8 |
| UPC | 070992472758 791489108973 115970703926 880959961375 189326618691 999992669855 151903146163 100010956509 088020618207 100177400228 168141264320 806293548683 |
| Upper Temperature Rating | 25 Degrees Celsius |

## Product Details

- **Brand:** BOSS Audio Systems
- **Capacitance:** 8 Farad
- **Equivalent series resistance:** 0.02 Ohms
- **Material:** Nickel
- **Shape:** Rectangular

## Images

![BOSS Audio Systems CAP8 Car Capacitor - 8 Farad, Energy Storage, Enhanced Bass From Stereo, Warning Reverse Polarity Tone, Voltage Overload Low Battery Voltage Led - Image 1](https://m.media-amazon.com/images/I/8142q7WDmBL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: what all comes with it?**
A: Hello, The CAP8 comes with a 1 Watt/51 ohm Resistor and mounting hardware.

**Q: Does this model flash to the beat?**
A: Hello,
The CAP8 only flashes when it is charging.
Thank you,
Boss Audio

**Q: Does this come with a distribution block and can it power a 4500w amp?**
A: The distribution block is built in. It has a in and a out for the positive and negative.  While the capacitor will help the battery and alternator supply enough power to turn it on it may not be able to supply enough support for those really low tones constantly.  I would recommend running a dual battery setup and if there is enough space to do so upgrade the alternator to as high a amperage as you can get. In my case I am driving a 1980 f350 and I upgraded to a 150 amp alternator and all lighting is led. I also run 2 batteries and am looking at installing a second alternator to supply enough power for my amplifier setup. I am pulling 3500 watts. When you install a larger alternator like I did using a 1 wire alternator you will also have to run a significantly larger wire from the alternator to the battery.

**Q: I have an 4000 watts hifonics amp and i have re audio sx 18 d2 1000 watts do u guys think this capacitor gonna handle my system?**
A: I think 3.5 farad its ok

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*Product available on Desertcart France*
*Store origin: FR*
*Last updated: 2026-09-12*