---
product_id: 50358232
title: "Boss Audio Ground Loop Isolator and Noise Filter"
brand: "boss audio systems"
price: "122 zł"
currency: PLN
in_stock: true
reviews_count: 13
category: "Boss Audio Systems"
url: https://www.desertcart.pl/products/50358232-boss-audio-ground-loop-isolator-and-noise-filter
store_origin: PL
region: Poland
---

# 2 RCA gold-plated inputs/outputs Compact 3.4" x 1.5" x 1.5" surface mount 2-channel ground loop noise filter Boss Audio Ground Loop Isolator and Noise Filter

**Brand:** boss audio systems
**Price:** 122 zł
**Availability:** ✅ In Stock

## Summary

> 🔇 Silence the noise, amplify your vibe.

## Quick Answers

- **What is this?** Boss Audio Ground Loop Isolator and Noise Filter by boss audio systems
- **How much does it cost?** 122 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/50358232-boss-audio-ground-loop-isolator-and-noise-filter)

## 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

- • **Sleek, Compact Design:** Small footprint with built-in mounting tabs for effortless installation anywhere.
- • **Dual-Channel Noise Isolation:** Filters noise from two RCA line-level channels, perfect for car and home audio setups.
- • **Trusted by Audio Enthusiasts:** Top 10 best seller in car amplifier noise filters with thousands of users upgrading their sound.
- • **Crystal-Clear Audio, No More Hum:** Eliminates ground loop noise and alternator whine for pristine sound quality.
- • **Premium Gold-Plated RCA Connectors:** Ensures superior signal transfer and corrosion resistance for lasting performance.

## Overview

The Boss Audio B25N Ground Loop Isolator and Noise Filter is a compact, dual-channel device designed to eliminate annoying ground loop hum and alternator whine from RCA audio systems. Featuring gold-plated RCA inputs and outputs for optimal signal clarity, it’s ideal for both car and home audio setups. With easy surface mounting and a proven track record as a top-ranked noise filter, it ensures your sound system delivers clean, uninterrupted audio.

## Description

Product Description BOSS B25N Ground Loop Isolator and Noise Filter Features The BOSS B25N is designed to eliminate ground loop noise (usually referred to as hum) and alternator whine from two RCA line-level audio channels. Great for the car, and even for the home, where amplifiers and other electronics (such as crossovers and equalizers) are separate of the source. Built-on mounting tabs facilitate installation. Dimensions (L x W x H): 3.4" x 1.5" x 1.5". Ground loops create noticeable hum in home audio systems, and alternator whine (also known as engine noise) in car audio systems. Eliminate both with the BOSS B25N ground loop isolator. Cancels irritating ground loops, Eliminate system hum in home audio systems, Remove alternator whine in car audio systems Box Contains 1 X Ground Loop Isolator and Noise Filter

Review: works very well - works very well in eliminating all alternator whine and interference noise for my subwoofer in my car
Review: Not fit for purpose - This was not fit for purpose. It increased the humming noise almost damaged my subs.

## Features

- RCA inputs (gold-plated) x 2
- RCA output terminal (gold-plated) x 2
- 2-Channel Ground Loop Isolator Filter

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000LP4RMG |
| Best Sellers Rank | 9 in Car Amplifier Noise Filters |
| Brand | BOSS Audio Systems |
| Country Of Origin | China |
| Customer Reviews | 3.8 3.8 out of 5 stars (2,515) |
| 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 centimetres |
| Item Weight | 0.25 Pounds |
| Manufacturer | Boss Audio |
| Material | Metal Plastic |
| Model Number | B25N |
| Mounting Type | Surface Mount |
| Number of Channels | 2 |
| Package Type Name | Standard_packaging |
| UPC | 163121368371 809187135679 809386486756 019372806240 132018222775 804066817783 791489170055 807031767632 115971573498 808112581604 808112397250 978654254783 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** BOSS Audio Systems
- **Item dimensions L x W x H:** 8.6 x 3.8 x 3.8 centimetres
- **Manufacturer:** Boss Audio
- **Mounting type:** Surface Mount
- **Number of channels:** 2

## Images

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

## Available Options

This product comes in different **Customer Package Type** 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

## Customer Reviews

### ⭐⭐⭐⭐⭐ works very well
*by Z***E on 26 March 2025*

works very well in eliminating all alternator whine and interference noise for my subwoofer in my car

### ⭐ Not fit for purpose
*by A***R on 26 March 2024*

This was not fit for purpose. It increased the humming noise almost damaged my subs.

### ⭐⭐⭐⭐⭐ It worked
*by C***Y on 11 May 2025*

To my surprise this thing worked and worked well.

## 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 Poland*
*Store origin: PL*
*Last updated: 2026-04-24*