Radio Design Labs AV-HK1 Hum Killer Unbalanced Isolation

Product Description

The RADIO DESIGN LABS AV-HK1 is a passive audio isolation transformer designed to eliminate hum and buzz caused by ground loops in unbalanced audio signal paths. It works by breaking the DC ground connection between two pieces of audio equipment while allowing the audio signal to pass cleanly. The AV-HK1 is typically installed inline between a signal source and a downstream amplifier, mixer, or recording interface. Audio installers and AV integration technicians use this device to resolve ground-loop interference in permanent installations and touring rigs alike.

The AV-HK1 is suited for residential and commercial audio signal chains where unbalanced connections such as consumer line-level gear introduce hum into an amplification or distribution system. Typical applications include rack-mounted AV systems, background music systems, conference room installs, and broadcast or recording environments where unbalanced consumer sources feed into professional equipment. It ships as a single unit and is sold individually.

Key Features

• Passive transformer-based design requires no external power source
• Breaks DC ground path to eliminate ground-loop hum and buzz
• Inline installation for unbalanced audio signal paths
• Compact form factor suitable for rack enclosures or junction boxes
• Single-unit quantity per package

Compatibility

Designed as an inline isolation solution for unbalanced audio signal paths in professional AV, broadcast, and commercial installation environments where ground-loop interference is present.

Installation Notes

The AV-HK1 is installed by AV integration technicians or audio engineers working on signal-distribution systems. Power down or mute all amplifiers and signal sources before making or breaking connections in the signal chain. No special tools are required for inline installation, though proper strain relief and cable management are recommended for permanent rack installations. Refer to the manufacturer product manual and applicable NEC guidelines for permanent wiring within an enclosure.