【HQI-20GL Ground Loop Isolator for Car Audio】

If you hear unpleasant noises such as “buzzing” or “hissing” from your car audio, a ground loop may be occurring due to factors such as how the devices are connected or your power supply environment.

HQI-20GL is a ground loop isolator for car audio used to address such noise issues. It uses a high-performance, ultra-compact isolation transformer to cut out out-of-band noise while minimizing any impact on the music signal. As a result, the noise you were bothered by when listening to music is reduced, making it easier to enjoy the sound more comfortably.

If the noise becomes noticeable only when you turn up the volume, the sound changes in sync with engine speed, or the noise started after you added equipment to the system, it’s important to identify the cause before simply replacing the devices.

At LOGON, we first check your current car audio system and connection status, and then determine whether adding the HQI-20GL is worthwhile. Depending on the source of the noise, it may be better to review not only the isolator, but also the power supply, grounding, and how the devices are connected.

We recommend this to anyone who wants to confirm together whether additional measures are actually needed for your current system—rather than adding parts unnecessarily.

Main Specifications / Specs

【Basic Information】
Product name: HQI-20GL
Type: Ground loop isolator for car audio

【Functions / Features】
・Uses an isolation transformer
・Noise suppression via ground loop prevention
・Cuts out out-of-band noise
・Designed to achieve flat frequency characteristics
・Supports adding to existing car audio systems

※Installation method and compatibility with your system will be provided after confirming your vehicle and the current connection status.