---
product_id: 3459241
title: "BOSS Audio Systems B25N Car Sound Noise Filter, Ground Loop Isolator"
brand: "boss audio systems"
price: "€ 54.35"
currency: EUR
in_stock: true
category: "Boss Audio Systems"
url: https://www.desertcart.nl/products/3459241-boss-audio-systems-b25n-car-sound-noise-filter-ground-loop
store_origin: NL
region: Netherlands
---

# Eliminates high-pitched alternator whine Dual-channel ground loop isolation Compact & lightweight design (3.4x1.5x1.5 in, 0.3 lbs) BOSS Audio Systems B25N Car Sound Noise Filter, Ground Loop Isolator

**Brand:** boss audio systems
**Price:** € 54.35
**Availability:** ✅ In Stock

## Summary

> 🔊 Drive Quiet, Sound Loud – Your Car’s Audio’s Best Friend

## Quick Answers

- **What is this?** BOSS Audio Systems B25N Car Sound Noise Filter, Ground Loop Isolator by boss audio systems
- **How much does it cost?** € 54.35 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/3459241-boss-audio-systems-b25n-car-sound-noise-filter-ground-loop)

## 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

- • **Pro-Grade Compatibility:** Optimized for use with high-quality RCA cables and independent amplifier grounding for maximum clarity.
- • **Sleek, Compact Build Fits Anywhere:** Small footprint and lightweight design make installation seamless and discreet.
- • **Trusted by Thousands, Backed for Years:** Join over 2,600 satisfied users and enjoy peace of mind with a 3-year warranty.
- • **Dual-Channel Isolation for Pristine Audio:** Two-channel ground loop isolator ensures interference-free stereo performance.
- • **Silence the Noise, Amplify the Experience:** Say goodbye to distracting alternator whine and enjoy crystal-clear sound on every drive.

## Overview

The BOSS Audio Systems B25N Ground Loop Isolator is a compact, dual-channel noise filter designed to eliminate high-pitched alternator whine and electrical interference in car audio systems. Measuring just 3.4 x 1.5 x 1.5 inches and weighing 0.3 lbs, it ensures clean, crisp sound by isolating ground loops. Compatible with high-quality RCA cables and featuring a 3-year warranty, it’s a trusted solution for audiophiles seeking flawless in-car audio performance.

## Description

desertcart.com: BOSS Audio Systems B25N Car Sound Noise Filter, Ground Loop Isolator : Electronics

## 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 | #15 in Car Amplifier Noise Filters |
| Brand Name | BOSS Audio Systems |
| Customer Reviews | 3.8 3.8 out of 5 stars (2,657) |
| Global Trade Identification Number | 00791489170055 |
| Included Components | BOSS Audio Systems Ground Loop Isolator B25N noise Filter for Car Audio Systems |
| Item Dimensions | 3.38 x 1.5 x 1.5 inches |
| Item Weight | 4 ounces |
| Manufacturer | BOSS Audio Systems |
| Material Type | Metal, Plastic |
| Model | 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 Count |
| Warranty Description | 3 Year Warranty |

## Product Details

- **Brand:** BOSS Audio Systems
- **Item dimensions L x W x H:** 3.38 x 1.5 x 1.5 inches
- **Manufacturer:** BOSS Audio Systems
- **Mounting Type:** Surface Mount
- **Number of Channels:** 2

## Images

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

## Available Options

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

## 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

## 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 Netherlands*
*Store origin: NL*
*Last updated: 2026-08-02*