---
product_id: 176988944
title: "BOSS RCA Amplifier Audio Systems Ground Loop Isolator B25N noise Filter for Car Audio Systems, White"
brand: "boss audio systems"
price: "₨21468"
currency: LKR
in_stock: false
reviews_count: 7
category: "Boss Audio Systems"
url: https://www.desertcart.lk/products/176988944-boss-rca-amplifier-audio-systems-ground-loop-isolator-b25n-noise
store_origin: LK
region: Sri Lanka
---

# Eliminates high-pitched alternator noise 4 RCA ports for seamless connectivity Compact 3.4x1.5x1.5 inch, lightweight 0.3 lbs BOSS RCA Amplifier Audio Systems Ground Loop Isolator B25N noise Filter for Car Audio Systems, White

**Brand:** boss audio systems
**Price:** ₨21468
**Availability:** ❌ Out of Stock

## Summary

> 🔊 Silence the noise, amplify your drive!

## Quick Answers

- **What is this?** BOSS RCA Amplifier Audio Systems Ground Loop Isolator B25N noise Filter for Car Audio Systems, White by boss audio systems
- **How much does it cost?** ₨21468 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/176988944-boss-rca-amplifier-audio-systems-ground-loop-isolator-b25n-noise)

## 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

- • **Optimized Grounding Tips:** Maximize performance with independent amplifier grounding and proper gauge wiring.
- • **Pro-Grade Noise Filtering:** Engineered to isolate ground loops and eliminate electrical interference for premium sound.
- • **Compact & Lightweight Design:** Discreetly fits into your car audio setup without adding bulk or weight.
- • **Plug & Play RCA Compatibility:** Effortlessly integrates with your car’s amplifier system using high-quality RCA connectors.
- • **Crystal-Clear Audio Experience:** Say goodbye to annoying alternator whine and enjoy pure sound clarity on every drive.

## Overview

The BOSS B25N Ground Loop Isolator is a precision noise filter designed to eliminate high-pitched alternator whine and electrical interference in car audio systems. Featuring 4 RCA ports and a compact, lightweight build, it ensures seamless integration and superior sound clarity. Ideal for audiophiles seeking a professional-grade upgrade to their in-car entertainment.

## Description

BOSS Audio B25N Ground Loop Isolator Noise Filter, Reduces High Pitched Whine Alternator Noise caused by the car's electrical system, Always Use High Quality RCA Cables for your Audio System.Dimensions: 3.4 x 1.5 x 1.5, Unit Weight: .30 Lbs. Tips: Ground each amplifier independently. Same thing if you have added stiffening capacitors, go to a separate ground for the cap. Tips: Make sure that the amplifiers have a good ground first. Use at least 10 Gauge wires for the grounds (and power). If you have 2 or more amplifiers, DO NOT go from the ground terminal of one amp to the other and then from there to ground.

Review: Five Stars - It is an excellent item to reduce unwanted sound% distractions in your live telecasting
Review: Super - Good quality audio

## Features

- Reduces High Pitched Whine Alternator Noise caused by the car's electrical system
- Ground Loop Isolator Noise Filter
- Always Use High Quality RCA Cables for your Audio System
- Dimensions: 3.4 x 1.5 x 1.5, Unit Weight: .30 Lbs. Tips: Ground each amplifier independently. Same thing if you have added stiffening capacitors, go to a separate ground for the cap

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000LP4RMG |
| Best Sellers Rank | #131,231 in Electronics ( See Top 100 in Electronics ) #5 in Car & Vehicle Noise Filters |
| Box Contents | BOSS Audio Systems Ground Loop Isolator B25N noise Filter for Car Audio Systems |
| Brand | BOSS Audio Systems |
| Brand Name | BOSS Audio Systems |
| Colour | multicolour |
| Compatible Devices | Amplifier |
| Connector Type | RCA |
| Customer Reviews | 3.8 out of 5 stars 2,505 Reviews |
| Global Trade Identification Number | 00791489170055 |
| Input Voltage | 240 Volts |
| Item Dimensions | 8.6 x 3.8 x 3.8 Centimeters |
| Item Package Quantity | 1 |
| Item Weight Unit of Measure | 113 g |
| Item dimensions L x W x H | 8.6 x 3.8 x 3.8 Centimeters |
| Manufacturer | Boss Audio Systems, Inc. |
| Model Number | B25N |
| Number of Items | 1 |
| Number of Ports | 4 |
| Power Plug Type | No Plug |
| Product Finish Type | Matte |
| Specific Uses For Product | Car Audio & Video |
| UPC | 163121368371 809187135679 809386486756 019372806240 132018222775 804066817783 791489170055 807031767632 115971573498 808112581604 808112397250 978654254783 |
| Unit Count | 1.0 Count |
| Warranty Description | no warranty available |

## Product Details

- **Compatible Devices:** Amplifier
- **Specific Uses For Product:** Car Audio & Video
- **Connector Type:** RCA
- **Colour:** multicolour
- **Item dimensions L x W x H:** 8.6 x 3.8 x 3.8 Centimeters

## Images

![BOSS RCA Amplifier Audio Systems Ground Loop Isolator B25N noise Filter for Car Audio Systems, White - Image 1](https://m.media-amazon.com/images/I/61TchapzvSL.jpg)
![BOSS RCA Amplifier Audio Systems Ground Loop Isolator B25N noise Filter for Car Audio Systems, White - Image 2](https://m.media-amazon.com/images/I/61c+qWyURVL.jpg)
![BOSS RCA Amplifier Audio Systems Ground Loop Isolator B25N noise Filter for Car Audio Systems, White - Image 3](https://m.media-amazon.com/images/I/61zglGUTucL.jpg)

## Questions & Answers

**Q: can someone explane to me what this does as if i were a complete idiot?**
A: The ground isolator removes ground noise caused  by other components in the power system of your audio devices, it does this by decoupling the amplifier from the audio source directly, wires wrapped around in a transformer allow the audio signal to pass through induction but leave the ground isolated. So any noise on the ground line is not sent to the audio input of the amplifier.

**Q: Can I insert this filter between my power amp and preamp in my home audio system to fix the hum problem?**
A: Your hum problem is likely between your preamp and one of its inputs. Disconnect each in turn to see which is the problem. Use this there.
It breaks the earth loop. 

If you put it between the pre and power amp, the hum is already in the audio signal, so it would not be effective at that point.

**Q: Will this eliminate the buzz between my record player and receiver?**
A: You can usually eliminate hum between your record player and your phono stage input by grounding the two devices together with a dedicated wire, usually built-in to the record player, which attaches to a stud on the phono preamp or stereo. Hope this helps.

**Q: Will this work for a CB radio?**
A: sure, it filters out noise from the power wire

## Customer Reviews

### ⭐⭐⭐⭐⭐ Five Stars
*by R***K on 3 April 2017*

It is an excellent item to reduce unwanted sound% distractions in your live telecasting

### ⭐⭐⭐⭐⭐ Super
*by D***. on 16 November 2018*

Good quality audio

### ⭐ Plz dont buy and don't waste u r money and time
*by K***H on 17 March 2017*

This is increasing noise instead of reducing. Plz dont buy and don't waste u r money and time.plz

## Frequently Bought Together

- BOSS Audio Systems Ground Loop Isolator B25N noise Filter for Car Audio Systems
- DteeDck RCA Splitter 1 Female to 2 Male, 2 Pack - RCA Audio Video Cable Splitter Adapter, Dark Blue
- Monoprice 1.5ft Premium 2 RCA Plug/2 RCA Plug M/M 22AWG Cable - Black

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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-02-20*