---
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: "€ 32.14"
currency: EUR
in_stock: true
reviews_count: 13
category: "Boss Audio Systems"
url: https://www.desertcart.pt/products/176988944-boss-rca-amplifier-audio-systems-ground-loop-isolator-b25n-noise
store_origin: PT
region: Portugal
---

# 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:** € 32.14
**Availability:** ✅ In 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?** € 32.14 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/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: Good - Good
Review: Five Stars - It is an excellent item to reduce unwanted sound% distractions in your live telecasting

## 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 | #246,700 in Electronics ( See Top 100 in Electronics ) #9 in Car & Vehicle Noise Filters |
| Brand | BOSS Audio Systems |
| Brand Name | BOSS Audio Systems |
| Country of Origin | USA |
| Customer Reviews | 3.8 out of 5 stars 2,521 Reviews |
| Global Trade Identification Number | 00791489170055 |
| Included Components | BOSS Audio Systems Ground Loop Isolator B25N noise Filter for Car Audio Systems |
| Item Dimensions | 8.6 x 3.8 x 3.8 Centimeters |
| Item Weight | 0.25 Pounds |
| Item dimensions L x W x H | 8.6 x 3.8 x 3.8 Centimeters |
| Manufacturer | Boss Audio Systems, Inc. |
| Material Type | Metal Plastic |
| Model Number | B25N |
| Mounting Type | Surface Mount |
| Number of Channels | 2 |
| Package Type Name | Standard_packaging |
| Part Number | B25N |
| UPC | 809187135679 163121368371 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

### ⭐⭐⭐⭐⭐ Good
*by A***M on 27 March 2026*

Good

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

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

### ⭐ Damaged item
*by T***Y on 26 April 2026*

I received a completely Damaged item

## 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 Portugal*
*Store origin: PT*
*Last updated: 2026-06-07*