---
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: "฿2767"
currency: THB
in_stock: true
reviews_count: 12
category: "Boss Audio Systems"
url: https://www.desertcart.co.th/products/176988944-boss-rca-amplifier-audio-systems-ground-loop-isolator-b25n-noise
store_origin: TH
region: Thailand
---

# Prevents electrical interference in car audio Compact 3.4 x 1.5 x 1.5 inch design Eliminates high-pitched alternator noise BOSS RCA Amplifier Audio Systems Ground Loop Isolator B25N noise Filter for Car Audio Systems, White

**Brand:** boss audio systems
**Price:** ฿2767
**Availability:** ✅ In Stock

## Summary

> 🔊 Silence the noise, amplify your vibe.

## 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?** ฿2767 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/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

- • **Plug & Play Simplicity:** Compact and lightweight design fits seamlessly into any car audio setup without hassle.
- • **Pro Tip for Audiophiles:** Ground each amplifier independently to maximize noise reduction and audio fidelity.
- • **Engineered for Precision:** High-quality ground loop isolation ensures your music stays interference-free, even in complex electrical systems.
- • **Trusted Boss Audio Quality:** From a leading brand in car audio, designed to enhance your in-car listening experience.
- • **Crystal Clear Sound, Always:** Say goodbye to that annoying alternator whine and enjoy pure audio clarity on every drive.

## Overview

The BOSS RCA Amplifier Audio Systems Ground Loop Isolator B25N is a compact noise filter designed to eliminate high-pitched alternator noise caused by your car’s electrical system. Weighing just 113 grams and measuring 3.4 x 1.5 x 1.5 inches, it ensures crystal-clear audio by isolating ground loops in your car audio setup. Ideal for professional-grade sound systems, it requires independent grounding of amplifiers for optimal performance.

## Description

GROUND LOOP ISOLATOR NOISE FILTER

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 |
|---------------|-------|
| Warranty | no warranty available |
| Height (inches) | 1.5 Inches |
| Width (inches) | 6 Inches |
| Weight | 0.17 Kilograms |
| Product Dimensions | 8.59 x 3.81 x 3.81 cm; 113.4 g |
| Item model number | B25N |
| Manufacturer | Boss Audio Systems, Inc. |
| Item Weight | 113 g |

## 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/41VMoUIUxCL._SS40_.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/41iELGNkGUL._SS40_.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/41sZ0AkpnfL._SS40_.jpg)
![BOSS RCA Amplifier Audio Systems Ground Loop Isolator B25N noise Filter for Car Audio Systems, White - Image 4](https://m.media-amazon.com/images/I/61TchapzvSL._SL1500_.jpg)
![BOSS RCA Amplifier Audio Systems Ground Loop Isolator B25N noise Filter for Car Audio Systems, White - Image 5](https://m.media-amazon.com/images/I/61TchapzvSL._SX679_.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 Thailand*
*Store origin: TH*
*Last updated: 2026-01-31*