Top 10 Best isolation transformer in 2026

Last Updated - 6/13/2026

🏆Best Choice

Pyle

Pyle Premium Direct Injection Audio Box - 2.36" x 4.09" Passive DI Unit Hum Eliminator w/ Input Attenuator to Connect Guitar & Bass, 1/4'' Impedance Transformer Connector to Balanced & Unbalanced XLR

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•¼ “ DEVICE CONNECTOR: Provides a variety of DI solutions with its ¼ inch device connector and detachable AC power cord for live sound recording applications. It allows you to easily connect keyboards, guitars & outboard signal processors
•PROVIDES CLEAN AUDIO: Useful for connecting unbalanced signals from sources submixers, effects processors & keyboards to a main PA or recording mixer. This impedance transformer also has buzz & hum cancellation ability
•EASILY CONNECTS INSTRUMENTS: Getting the signal of a musical instrument to the PA system is easier with this direct box. Just connect the electric bass, guitar, keyboard or other processors to the ground lift adapter & enjoy pure & clean audio
•VERSATILE DIRECT BOX: Aside from music instruments, the DI unit can also be connected to the line output of a boom box or consumer stereo system if you want to sample old records. The hum eliminator is used for connecting unbalanced devices as well
•Premium Direct Injection Audio Box - Passive DI Unit Hum Eliminator w/ Input Attenuator to Connect Guitar & Bass, 1/4'' Impedance Transformer Connector to Balanced & Unbalanced XLR, Black

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$17.99

$19.99

-10%

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Pyle

Pyle Compact Mini Hum Eliminator Box - 2 Channel Passive Ground Loop Isolator, Noise Filter,AC Buzz Destroyer, Hum Killer w/ 1/4" TRS Phone,XLR Input/Output, Uses 1:1 Isolation Transformer

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•REMOVES AC NOISE: The Pyle Hum Eliminator removes 60Hz AC hum caused by ground loops that act like radio antennae (loop antenna). It breaks the ground loop safely making it impossible for the signal lines to pick up the AC noise in the first place 
• PASSIVE DEVICE: The noise isolator is a passive device that does not require power to operate. Equipped w/ ¼” TRS phone and XLR inputs and outputs on 2 channels. Automatically converts unbalanced to balanced signal without any signal loss  
• COMPACT DESIGN: This noise filter device features a high-performance ultra-compact and portable design allowing you to easily bring it anywhere. It has high-quality components and rugged construction while maintaining the highest sonic quality 
•1:1 ISOLATION TRANSFORMERS: The 1:1 isolation transformer is responsible for breaking the ground loop or the loop antenna that prevents buzz for a clear sound. Also responsible for balancing audio lines. The device accepts mono or stereo connections 
•WORRY-FREE SHOPPING: With the PylePro PHE400 Hum/Noise Eliminator, we are confident of the quality of our product, therefore, we offer a 30-day money-back guarantee, no questions asked

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$24.99

$29.99

-17%

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AEDIKO

AEDIKO 10pcs EI-14 Audio Transformer High Efficiency Audio Isolation Transformers 1:1 600:600 Ohm for Voltage Amplification and Power Output

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•Model:EI-14
•AC Impedance: 600 : 600 Ohm
•High Quality: Audio Transformer Made of High Quality Materials, Sufficient Pass-band,Original Winding Inductance is Large, the Leakage Inductance is Small,Reduce Influence of Hysteresis Loss
•Easy to Use: Audio Transformer Designed to Transform Voltage or Change the Impedance of a Load,Stable Performance, High Reliability, Convenient to Use
•Application: Audio Transformer Used as Components for Circuits Such as Voltage Amplification and Power Output in Radio Communication, Broadcast Television, and Automatic Control

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$6.99

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HiLetgo

HiLetgo 5pcs EI14/EI-14 Audio Coupling Isolation Transformer Audio Transformer 600:600 1:1

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•Advantages:high pressure and stable performance
•AC impedance : EI14 600 : 600 Ohm
•Inductance:290mH (±20%)
•Quality &wire diameter : QA-1 0.06MM
•Alternating-current impedance value : 600

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$6.49

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BOJACK

BOJACK EI-14 High Efficiency Audio Isolation Transformers 1:1 600:600 Ohm (Pack of 10)

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•High efficiency audio isolation transformers
•MODEL:EI-14
•Voltage ratio: 1:1
•AC impedance : 600 : 600 Ohm
•Lead-Free / RoHS Compliant Electronics Component.

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$9.99

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Triad Magnetics

Triad Magnetics TY-145P Audio Transformer, Through Hole, 600 Ohms

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•Impedance: primary: 600ω ct + 15 percent with 600ω load; secondary: 600ω ct and output: 100Mw
•Turns ratio: 1:1 and insertion loss @ 1Khz: <1.5Db
•Return loss: >26Db
•Frequency response: 2Db from 200 To15,000 hz
•Dielectric strength: 1500V primary to secondary to core and 6-pin pc mount

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$8.41

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BESIGN

BESIGN Ground Loop Noise Isolator for Car Audio/Home Stereo System with 3.5mm Audio Cable

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•Ground loop filter noise isolator, eliminating the hiss, buzz and interference caused by ground loops which happens when the audio source and the speaker use the same power source in some car speakers / home stereo systems when using the Bluetooth receiver.
•You can enjoy the clean and clear music/audio by eliminating the current noise in some car speakers / home stereo systems.
•Works with any device that has a 3.5mm jack including smartphones, tablets, mp3 player, speakers, when grounding issues persist. You could also use with a Bluetooth Receiver/Bluetooth Hands-free Car Kit in your Car Audio System/Home Stereo.
•Being so mini, portable and light, plug and play, no battery need or button, all you need to do is to plug in the ground loop isolator
•Portable, light-weight and plug and play without any complicated setup. Package Contents: Besign Ground Loop noise Isolator with 3.5mm Audio Cable, User Manual.

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$8.99

$9.99

-10%

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Conext Link

Conext Link RCA Stereo 2 Channel Ground Loop Isolator Signal Noise Filter Suppressor Reducer Alternator for Car Audio Stereo（13600）

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•Eliminates Humming and Buzzing Between Audio Source and Amplifier Due to Ground Loop Issues
•Filters Out DC Current in the Signal Path
•Cylindrical Metal Case with Heat Shrink Tube. Dimension: Dia. 36mm, 62mm Long
•Contain 28cm Long Interconnects, 2 Male and 2 Female RCA Gold Connectors
•20 Amp, Input 30 Watt Max 60 Watt, Frequency: 20-30K Hz

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$8.39

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Smof

Smof Upgraded Ground Loop Noise Isolator, Noise Filter for Car Audio/Home Stereo System (Eliminate The Buzzing Noise Completely) with 3.5mm Audio Cable, Black

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•【UPGRADED GROUND LOOP NOISE ISOLATOR】Say goodbye to annoying buzz and static in your speakers. Connect this audio noise filter to instantly eliminate hum from your car audio system, radio, home stereo or speakers, thus returning you to quality music.
•【3.5MM CABLE CONNECTION】 Smof Ground Loop Noise Isolator Compatible with any device that has a 3.5mm jack, including smartphones, laptops, tablets, and MP3 players.
•【EXTREMELY SIMPLE OPERATION】 Extremely simple to use - just plug the isolator directly into your car or speaker's AUX port, then connect the audio source with the included cable. No charging or batteries required!
•【PORTABLE】Ultra-portable design - the Smof Noise isolator is small and lightweight, so it won't take up extra space in your car or bag.
•【PACKAGE CONTENTS】 Package includes the G06 audio isolation transformer, 3.5mm audio cable, user manual, and a 24-month product replacement warranty. Plus, our customer service team is available 24/7 to assist you.

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$8.49

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HiLetgo

HiLetgo 2pcs HiFi Audio Stereo Isolator Acoustic Noise Isolation Current Sound Interference Eliminate Filter Isolation Ground Loop Suppressor

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•HiFi Audio Stereo Isolator Acoustic Noise Isolation
•Current Sound Interference Eliminate Filter
•High sensitivity and high reduction, 10-20DB higher sensitivity than similar low-end , full tone, pure sound quality
•Can eliminate current sound and current noise from the AUX common ground.
•Suitable for small cars and other interior installations.

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$9.39

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