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5 of the Best Ground Loop Isolators for Stopping Those Annoying Audio Noises

Getting interrupted by a static buzzing noise while you’re in the mood to lip-sync your favorite tracks is undoubtedly super annoying. The most common cause of this interruption is the ground loop effect on your stereo.

A ground loop effect occurs when there is an unnatural potential difference between two components of your stereo that were naturally supposed to have the same potential difference. Unless you’re some science nerd with a garage full of electronic equipment, manually balancing this potential difference can be very challenging.

Luckily, you can always get away from the hassle of fixing the entire stereo by using a ground loop isolator. These amazing devices filter out any buzzing or humming noise that tries to disturb your mood, giving out only high-quality audio.

The issue is that most of these isolators in the market are of pathetic quality and last only for a few days. The ones that manage to last long enough don’t work properly, which makes it pointless to use them. So to help you out, we’ve compiled an extensive list of the best ground loop isolators that are durable, affordable, and don’t affect the audio quality. So without any delay, let’s dive right into the options.

1. BESIGN Ground Isolator Stereo System

BESIGN Ground Isolator Stereo System

  • Eliminates static noise
  • 20cm long cable
  • Plug and play, no batteries needed

Last update on 2022-07-13 / Affiliate links / Images from Amazon Product Advertising API

The BESIGN Ground Loop Noise Isolator is one of the best noise isolators available in the market, and with over 2000 positive customer reviews, it’s easy to see why. It is crafted to be as lightweight as possible and only weighs 0.8 ounces. The fob or the tiny case that contains the electronics is around 3.5 inches in length and is connected to an 8-inch long aux cable.

Due to its tiny form factor and robust build quality, it is perfect to be used in cars as well as for your home theater. Using this noise isolator is very simple. All you have to do is insert your aux cable in its 3.5mm jack and connect the isolator’s aux cable to the stereo system.

That being said, the benefits of getting a ground loop noise isolator are not limited to just fixing the unwanted buzzing noise from the stereo. With the bidirectional BESIGN isolator, you can not only listen to uninterrupted music but also pair it up with a BlueTooth receiver and enjoy streaming music wirelessly.

2. Ground Isolator by MW Audio NY

Ground Isolator by MW Audio NY

  • Eliminates static noise
  • Compatible with any 3.5mm jack device
  • Plug and play, no batteries needed

Last update on 2022-07-13 / Affiliate links / Images from Amazon Product Advertising API

This sturdy and compact ground loop isolator is compatible with any portable DC speaker with a 3.5mm audio jack. It can be used to get rid of the persisting grounding issue in both your car’s and your home’s stereo.

The key feature of this ground loop isolator is its premium build quality. The fob that encases the transformer is a solid block while still being extremely lightweight. Just like the BESIGN Ground Isolator, It can also be combined with a BlueTooth receiver to enjoy your music without buzzing background noises wirelessly.

What’s different about this noise isolator is that it has an output jack instead of a fixed aux cable at one end. This allows you to simply replace the aux cable in case it’s damaged without having to replace the entire ground loop isolator.

3. Smof Ground Loop Noise Isolator

Smof Ground Loop Noise Isolator

  • Eliminates static noise
  • Compatible with any 3.5mm jack device
  • Plug and play, no batteries needed
  • 2-year warranty

Last update on 2022-07-13 / Affiliate links / Images from Amazon Product Advertising API

The Smof noise isolator is compatible with smartphones, laptops, tablets, and even portable MP3 players. Just like the other noise isolators mentioned above, It acts as the middle man between the audio source and the speakers.

You’ll notice a rapid and discrete transformation in the sound quality right after routing your audio through it. Even though it functions in the same manner as the above-mentioned noise isolators, a few differences make it stand out from the competition.

This ground loop isolator is designed to be sturdy while still being ultra-small and lightweight. Its diameter is only half of a 25 cent coin, and it weighs just 0.81 lbs. The best part is that it also comes with a 24 month warranty period.

4. PYLE PRO PHE400 Eliminator

PYLE PRO PHE400 Eliminator

  • PRO-level design
  • Works with musical instruments
  • In/out ports on 2-channels

Last update on 2022-07-13 / Affiliate links / Images from Amazon Product Advertising API

What if you’re experiencing buzzing and hissing noises from your AC amplifier or your high-end sub-woofers? Well, the Pyle Pro PHE400 is perfect for eliminating any interruption from such high-end speaker setups that run directly on AC current.

It works without a battery and is equipped with a 14 inch TRS phone and XLR input along with two output channels. Its 1:1 separation transformer instantly breaks the ground loop, which prevents buzz and delivers a crystal-clear sound without affecting the audio quality at all.

The Pyle Pro PHE400 also features a high-temperature aluminum voice coil to support high-frequency signals. Additionally, it is equipped with a strong capacitor for excellent power handling of up to 240 watts.

5. iFi iDefender External Ground Eliminator

iFi iDefender External Ground Eliminator

  • Very compact design
  • Works with all USB type A ports
  • Weighs just 6g

Last update on 2022-07-13 / Affiliate links / Images from Amazon Product Advertising API

If you use a USB cable to connect your phone to your stereo, or if you use a Pendrive to play songs, you can still experience the same buzzing noises. The iFi Defendor Ground loop eliminator is the perfect device to get rid of such disturbances. When connected with your audio source, it automatically detects and eliminates unwanted ground loops. Not only does it reduce the system noise floor drastically, but it also increases the dynamic contrast and resolution of your music.

The most common reason that causes ground looping issues while connecting your phone via a USB port is that your phone also draws power from the same port while transmitting the audio signals. This ground loop isolator has an additional USB C port that can be used to charge your device while streaming music from it which eliminates any chances of creating an extra ground connection.

When you plug in the charger to his isolator, it automatically cuts off the power transfer from your speakers to your phone and feeds it from the charger itself. This makes it perfectly safe for your source device as they are not going to be exposed to overvoltages.


Here are answers to the most commonly asked questions regarding ground loop isolators.

How Does a Ground Loop Isolator Work?

A ground loop isolator is a simple device that is composed of three parts. Firstly there’s the input jack, a transformer, and an output jack.

The input jack routes all audio signals in the form of electricity into the ground loop isolator. The transformer converts these electric signals to magnetic waves that are then sent to your stereo system through the output jack.

Since the audio signals are converted into magnetic waves, the possibility of causing an unnatural potential difference is eliminated, resulting in uninterrupted audio streaming.

How to Install a Ground Loop Isolator?

Installing a ground loop isolator Is very simple. For AUX-based ground loop isolators, you can directly connect it’s one end to your stereo’s AUX port and the other to your smartphone.

For USB-based audio isolators, you need to first plug the device into the USB port of your stereo. Now you can plug in your phone or your Pendrive to the USB input port of the noise isolator. If you use a phone or an mp3 player, you might also need to connect the noise isolator to a USB C charger via the third port to completely eliminate any noise interruptions.

Aux (3.5mm) Vs. USB Audio Isolators

There are two different kinds of noise isolators. One has an AUX (3.5mm) input and output jack, and one is based on USB ports.

The AUX-based audio isolators act as the middle man between your smartphone’s 3.5mm AUX port and the stereo. They filter any noise disturbances that occur between this connection. On the other hand, a USB-based noise isolator eliminates the interruptions that occur due to the electric current passing through the USB connection while audio signals are being transmitted. It features a USB input and a USB output instead of an AUX input and output.

Do Ground Loop Isolators Affect Sound Quality?

Ground loop isolators do not affect the sound quality and are only responsible for eliminating the ground loop effect. However, some noise isolators also enhance the sound resolution but rest assured, they have no negative impact on the sound.

Where Can You Use Them?

Ground loop isolators can be used with any speaker or amplifier that has a 3.5mm audio jack or a USB port. For high-end applications, you can also use an AC-based noise isolator to connect with multiple speakers simultaneously.

What Are Some Alternatives?

If you’re unsure about getting a ground loop isolator, you can get yourself a Bluetooth noise-cancelling AUX adaptor. It uses a Bluetooth 5.0 chip to directly stream the music through your phone without your phone being connected to an AUX cable.

Another great alternative is to use a power bank to charge your phone to avoid creating unwanted ground loops while connecting it to your car’s stereo using an AUX cable.


To sum it up, ground loop isolators work brilliantly to eliminate the annoying buzzing noises from your music. We hope this article helped you understand how getting a ground loop isolator works and which one you should buy according to your use case.