---
product_id: 282068454
title: "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: "985.81 DT"
currency: TND
in_stock: true
reviews_count: 5
category: "Boss Audio Systems"
url: https://www.desertcart.tn/products/282068454-cap8-car-capacitor-8-farad-energy-storage-enhanced-bass-from
store_origin: TN
region: Tunisia
---

# 8 Farad ultra-fast energy reserve Audible multi-alert warning system Super bright 3-digit blue LED voltage display 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:** 985.81 DT
**Availability:** ✅ In Stock

## Summary

> ⚡ Amplify Your Drive with Instant Power & Precision!

## Quick Answers

- **What is this?** 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?** 985.81 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/282068454-cap8-car-capacitor-8-farad-energy-storage-enhanced-bass-from)

## 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

- • **Smart Sleep Mode:** Automatic sleep status activates during low volume or no voltage change, optimizing power efficiency without sacrificing performance.
- • **Never Miss a Beat:** Audible warning tones alert you instantly to reverse polarity, voltage overload, or low battery—protect your gear like a boss.
- • **Stay Informed, Stay Ahead:** Super bright digital LED voltage display with ±0.1 V accuracy keeps your system’s power status crystal clear at a glance.
- • **Power Your Bass Like a Pro:** 8 Farad capacitance delivers instant energy bursts for thunderous, distortion-free bass that commands attention.
- • **Built to Last & Backed by Confidence:** Robust nickel construction with a 3-year warranty ensures your investment powers your ride reliably for years.

## Overview

The BOSS Audio Systems CAP8 Car Capacitor is an 8 Farad energy storage powerhouse designed to stabilize and enhance your car audio system’s bass performance. Featuring a super bright 3-digit blue LED voltage display with ±0.1 V accuracy and audible alerts for reverse polarity, voltage overload, and low battery, it ensures your system runs safely and efficiently. Its smart sleep mode conserves energy during downtime, while durable nickel construction and a 3-year warranty guarantee long-lasting reliability. Perfect for audiophiles craving consistent, punchy sound without compromise.

## 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

Review: super! - Super job , fonctionne super bien ! l'alternateur en charge ne bouge pas lors d'un coup de base.
Review: Oui c'est parfait - Livraison rapide

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | BOSS Audio Systems |
| Capacitance | 8 Farad |
| Equivalent series resistance | 0.02 Ohms |
| Material | Nickel |
| Maximum storage temperature | 25 Degrees Celsius |
| Shape | Rectangular |

## Product Details

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

## Images

![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/81cSBwBMSJL.jpg)

## 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

## Customer Reviews

### ⭐⭐⭐⭐⭐ super!
*by P***N on 1 June 2020*

Super job , fonctionne super bien ! l'alternateur en charge ne bouge pas lors d'un coup de base.

### ⭐⭐⭐⭐⭐ Oui c'est parfait
*by J***É on 22 May 2023*

Livraison rapide

### ⭐⭐⭐⭐⭐ Excellent !
*by M***M on 17 August 2021*

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

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-06-23*