---
product_id: 575388925
title: "RCA Audio Ground Loop Isolator, Hum Noise Eliminator for High-Fidelity Stereo Home Theater & Car Audio Players with 3.5mm Ground Loop Noise Isolator"
brand: "fmuser"
price: "0.84 OMR"
currency: OMR
in_stock: false
reviews_count: 9
url: https://www.desertcart.com.om/products/575388925-rca-audio-ground-loop-isolator-hum-noise-eliminator-for-high
store_origin: OM
region: Oman
---

# One-key switch for versatile setup Hum Eliminator for crystal-clear sound Isolation transformer protects devices RCA Audio Ground Loop Isolator, Hum Noise Eliminator for High-Fidelity Stereo Home Theater & Car Audio Players with 3.5mm Ground Loop Noise Isolator

**Brand:** fmuser
**Price:** 0.84 OMR
**Availability:** ❌ Out of Stock

## Summary

> 🎧 Elevate your audio game—ditch the hum, keep the vibe!

## Quick Answers

- **What is this?** RCA Audio Ground Loop Isolator, Hum Noise Eliminator for High-Fidelity Stereo Home Theater & Car Audio Players with 3.5mm Ground Loop Noise Isolator by fmuser
- **How much does it cost?** 0.84 OMR with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.om](https://www.desertcart.com.om/products/575388925-rca-audio-ground-loop-isolator-hum-noise-eliminator-for-high)

## Best For

- fmuser enthusiasts

## Why This Product

- Trusted fmuser brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Silence the Noise:** Eliminate annoying ground loop hums for pristine audio clarity
- • **Gold-Plated Excellence:** Premium RCA connectors ensure superior signal transfer and durability
- • **Plug & Play Versatility:** Seamlessly switch between common and non-common ground setups with a simple toggle
- • **Universal Compatibility:** Perfect for car audio systems and home theaters alike—upgrade any setup instantly
- • **Device Protection Guaranteed:** Isolation transformer safeguards your valuable audio gear from electrical damage

## Overview

The FMUSER RCA Audio Ground Loop Isolator is a compact, gold-plated device designed to eliminate ground loop hum and protect audio equipment. Featuring an isolation transformer and a one-key switch for easy adaptation to various audio setups, it delivers high-fidelity sound for car and home theater systems. Lightweight and durable, it’s an essential upgrade for anyone seeking noise-free, professional-grade audio performance.

## Description

Product description When using home or car audio systems, it is inevitable to encounter the buzzing noise known as "electrical noise" coming from the speakers. This noise can greatly affect your user experience and make it unpleasant. In fact, the "electrical noise" we hear does not refer to a single type of noise, but rather different types of noises with different causes and solutions. The first common type of "electrical noise" is the hissing sound coming from the speakers. This "electrical noise", characterized as a hissing sound from speakers, is a common issue referred to as the background noise in audio systems. This noise is intrinsically linked to the quality of the audio equipment. High-quality systems typically produce less of this noise, while cheaper, lower-quality systems may emit a more noticeable hissing sound. This background noise becomes more pronounced as the volume level increases. As you turn up the volume, the background noise also gets amplified, making it more distinct and potentially disruptive to the listening experience. A common misconception about this issue is that it can be mitigated through adjustments to the audio system's settings. However, this is not the case. The background noise is inherent to the system's quality, so In dealing with this issue, options are limited. Users can either tolerate the noise or replace the audio system equipment. The second common type of "electrical noise" is the unstable noise that fluctuates in volume or occurs intermittently. This noise is mainly caused by electromagnetic interference during signal transmission, which means there is poor shielding. There are two main reasons for this situation. First, it could be due to poor quality signal cables with inadequate shielding density, resulting in interference and noise. In this case, replacing the cables with higher quality ones is required. Second, it could be caused by high-impedance unbalanced signals, such as those from electric guitars or electric basses. When these signals are transmitted over a distance longer than 10 meters, they are prone to interference and noise. To address this, a DI box should be added on the end closer to the signal source to convert the high-impedance unbalanced signal to a low-impedance balanced signal before connecting it to the mixing console. The third most common type of "electrical noise" is a strong humming noise known as Hum noise. This noise occurs when the grounding points of two audio devices are not at the same point. Due to the difference in wiring resistance, the noise enters the audio devices through the ground wire, causing interference and noise. We call this common ground noise. This noise often appears in car audio systems, home speakers, radio stations, and recording studios. To solve this problem, you can connect the FMUSER audio ground isolation device between the audio devices. The principle of the audio ground isolation device is to use an isolation transformer to cut off the direct connection of the ground wire in the audio line, thus avoiding the occurrence of common ground noise. Eliminate Ground Loop Noise with the FMUSER Ground Isolator Say goodbye to annoying ground loop noise with the FMUSER Common Ground Isolator! This powerful little device wipes out ground loop hum while preserving the rich, deep bass and volume of your music. Enjoy crystal-clear sound the way it was meant to be heard, with zero distortion and maximum impact. P.S. The FMUSER audio ground isolation device can only eliminate the noise caused by the common ground of electrical products, and it cannot eliminate other noises such as audio equipment background noise or RF interference. We can test whether the noise is caused by common ground noise using the following methods . Connect passive headphones to the audio source device. If there is no noise, but there is noise when connecting to the speaker system, it indicates common ground noise. Installing an audio ground isolation device can solve this. In car audio systems, if there is noise after starting the car, and the noise gets louder as the throttle increases, it is common ground noise. Installing an audio ground isolation device can solve this. Pinpointing the source of audio noise can be quite complex, and it's important to determine if the issue is due to audio ground loop problems. We recommend that you first test whether the noise is caused by a common ground issue before purchasing our FMUSER Audio Ground Loop Isolator. If you suspect that ground loop noise is the culprit, our isolator is designed to specifically address this problem and could be the perfect solution for your needs. Should you find that it doesn't resolve your issue, you are welcome to initiate a return. Your satisfaction is our priority, and we are committed to helping you achieve the best possible audio experience. Connection Method RCA to RCA Aux to Aux RCA to Aux Aux to RCA Specification

Review: Great for PC to Mixer - I had a horrible hum from my gaming PC when sending it through my mixer for streaming, but this completely eliminated the hum I was having.
Review: Works fine yet inexpensive - I needed this to eliminate a ground loop hum between my PC and an external audio amp. Worked great. Note that there is a switch that must be flipped accordingly to lift the ground as needed. Audio quality seems fine since it’s only MP3 music. Probably wouldn’t buy this for a million dollar recording studio but for my needs, this was an economical choice.

## Features

- Hum Eliminator: Say goodbye to noise issues in your car and home audio systems, and enjoy high-fidelity sound output. This product is the perfect solution for tackling stereo noise problems.
- Isolation Transformer: Safeguard your audio devices from potential damage caused by excessive potential difference. This transformer effectively isolates the potential difference between two audio devices, ensuring the protection of input components.
- Superior Performance: Experience exceptional audio fidelity, isolation, and noise elimination with the gold-plated RCA interface and advanced permalloy audio isolator. Enjoy outstanding performance in audio quality.
- Versatile Adaptability: Easily switch between common ground and non-common ground setups with the one-key switch. This product is designed to perfectly adapt to various complex audio and electrical environments.
- Wide Range of Applications: Protect your input components and eliminate ground noise in audio equipment connections. This product is commonly used in car audio systems and home theater setups, making it ideal for a wide range of applications.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CJ9H6PZT |
| Best Sellers Rank | #125 in Car Amplifier Noise Filters |
| Brand | fmuser |
| Brand Name | fmuser |
| Customer Reviews | 4.1 out of 5 stars 18 Reviews |
| Interface | RCA |
| Interface Type | RCA |
| Manufacturer | fmuser |
| Material | Gold |
| Material Type | Gold |
| Model | RCA |
| Number of Channels | 2 |
| Number of Pins | 2 |
| Part Number | MCY0020 |
| Warranty Description | 1 year manufacturer |

## Product Details

- **Brand:** fmuser
- **Interface Type:** RCA
- **Material:** Gold
- **Number of Channels:** 2
- **Number of Pins:** 2

## Images

![RCA Audio Ground Loop Isolator, Hum Noise Eliminator for High-Fidelity Stereo Home Theater & Car Audio Players with 3.5mm Ground Loop Noise Isolator - Image 1](https://m.media-amazon.com/images/I/51Iih2Fap0L.jpg)
![RCA Audio Ground Loop Isolator, Hum Noise Eliminator for High-Fidelity Stereo Home Theater & Car Audio Players with 3.5mm Ground Loop Noise Isolator - Image 2](https://m.media-amazon.com/images/I/511bWVwdSnL.jpg)
![RCA Audio Ground Loop Isolator, Hum Noise Eliminator for High-Fidelity Stereo Home Theater & Car Audio Players with 3.5mm Ground Loop Noise Isolator - Image 3](https://m.media-amazon.com/images/I/61v-TQkPe9L.jpg)
![RCA Audio Ground Loop Isolator, Hum Noise Eliminator for High-Fidelity Stereo Home Theater & Car Audio Players with 3.5mm Ground Loop Noise Isolator - Image 4](https://m.media-amazon.com/images/I/61SDWNqJqfL.jpg)
![RCA Audio Ground Loop Isolator, Hum Noise Eliminator for High-Fidelity Stereo Home Theater & Car Audio Players with 3.5mm Ground Loop Noise Isolator - Image 5](https://m.media-amazon.com/images/I/71r4EUN3iIL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great for PC to Mixer
*by M***R on March 19, 2026*

I had a horrible hum from my gaming PC when sending it through my mixer for streaming, but this completely eliminated the hum I was having.

### ⭐⭐⭐⭐⭐ Works fine yet inexpensive
*by W***L on July 29, 2025*

I needed this to eliminate a ground loop hum between my PC and an external audio amp. Worked great. Note that there is a switch that must be flipped accordingly to lift the ground as needed. Audio quality seems fine since it’s only MP3 music. Probably wouldn’t buy this for a million dollar recording studio but for my needs, this was an economical choice.

### ⭐ Made no difference - another device did work. I wouldn't waste time on this.
*by A***. on April 18, 2024*

Did not work while another device did

## Frequently Bought Together

- FMUSER RCA Audio Ground Loop Isolator, Hum Noise Eliminator for High-Fidelity Stereo Home Theater & Car Audio Players with 3.5mm Ground Loop Noise Isolator
- CESS-163-4i Low Noise 12 Gauge Premium RCA Audio Line Patch Cable (4 Inches)
- Monoprice 1.5ft Premium 2 RCA Plug/2 RCA Plug M/M 22AWG Cable - Black

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**Shop now:** [https://www.desertcart.com.om/products/575388925-rca-audio-ground-loop-isolator-hum-noise-eliminator-for-high](https://www.desertcart.com.om/products/575388925-rca-audio-ground-loop-isolator-hum-noise-eliminator-for-high)

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*Product available on Desertcart Oman*
*Store origin: OM*
*Last updated: 2026-05-30*