KGUSS Topping HS02 USB Audio Isolator - Eliminates Ground Loop Hum

In this review the KGUSS Topping HS02 USB audio isolator is evaluated for listeners and professionals who need a simple way to remove ground loop noise from USB audio chains. The core reason to consider the HS02 is its fully isolated design that separates the audio signal from ground while allowing auxiliary power without adding interference. For anyone dealing with hum or noise when connecting a computer to DACs, USB streamers or recording gear, the HS02 promises a straightforward hardware fix with high-resolution compatibility.

Key Features

• Fully Isolated Design: Prevents ground loop interference and stops hum while letting auxiliary power be used without introducing new noise into the audio path.
• Two Inputs, Two Outputs: A physical input switch selects between USB-B and Type-C from the computer, and an output switch selects USB-A or Type-C to the USB device for flexible connectivity.
• High Resolution Support: Automatically identifies USB2.0 speeds and supports high-resolution audio up to PCM 32bit/768kHz and DSD512 Native for demanding playback.
• Extremely Low Latency: Latency of 0.073us keeps timing accurate for hifi listening and professional monitoring without audible delay.
• Large Isolation Voltage: Withstands up to 1500VDC isolation, providing robust separation between host and device grounds for safety and noise suppression.

Who It's For

The HS02 is best for audiophiles, home studio users, and anyone who experiences audible ground loop hum when connecting a computer to a USB DAC or USB-powered audio device. Its simple switches and broad resolution support make it suitable for users who want a plug-and-play way to clean up sound without reworking grounding or adding complicated equipment.

It is less appropriate for those who need USB3.0 bandwidth or devices that depend on nonstandard USB features outside USB2.0, or for users who prefer a powered hub with many ports. Also, a few users noted varied impressions of build quality, so buyers expecting heavy industrial duty should consider that feedback.

Pros & Cons

Pros

• Effectively reduces ground loop noise, with real-world measurements showing up to 50dB reduction.
• Supports very high-resolution formats including PCM 32bit/768kHz and DSD512 Native for hi-res playback.
• Flexible input and output switching between USB-B, USB-A and Type-C covers most modern setups.
• Ultra low latency suits both listening and professional monitoring duties.

Cons

• Some customers report mixed impressions of build quality and occasional reliability issues over time.
• Limited to USB2.0 transmission speeds, so it will not provide USB3.0 data rates if that is required.

Specifications

Our Verdict

The HS02 is a practical, good-value tool for anyone battling ground loop noise when using USB audio devices. It delivers clear noise reduction, flexible connections, and top-tier resolution support, making it a strong pick for audiophiles and home studios; those needing USB3.0 speeds or industrial ruggedness should look elsewhere.

Frequently Asked Questions

Will the HS02 remove hum from my DAC?
Yes, the fully isolated design is specifically intended to eliminate ground loop hum between a computer and a USB audio device.

Does it support high-resolution audio?
Yes, it supports PCM up to 32bit/768kHz and DSD512 Native while operating over USB2.0.

Can I use it with Type-C only systems?
Yes, the unit includes Type-C input and output options and physical switches to select the active connections.