HUM KILLER Stereo Audio Isolation Module

Ideal Use Cases

The HUM KILLER AV-HK1 is designed for unbalanced stereo audio paths that require ground isolation, ground-loop elimination, or galvanic isolation. It is suited to systems in which two audio channels must be isolated while retaining a compact, self-contained form. Because the module is portable and enclosed in a rugged field case, it can support field applications as well as permanently arranged systems. Its surface-mounting capability is useful when the module must remain secured rather than loose. With two inputs and two outputs, the AV-HK1 is configured specifically for stereo signal paths.

Why Choose This Model

The AV-HK1 combines stereo galvanic isolation with clearly defined audio and physical specifications. Each of its two inputs and two outputs is rated for 10 dBV nominal operation at 10 kΩ, providing known interface requirements for system planning. Its enclosure measures 2.05 inches wide by 2.90 inches long and stands 1.38 inches high when unmounted or 1.44 inches high when mounted. This compact footprint makes the module practical where installation space is limited. Published frequency-response, distortion, and crosstalk figures also allow its performance to be evaluated before integration.

Installation and Integration

Integrate the AV-HK1 into the unbalanced stereo line requiring isolation, using the pair of inputs and pair of outputs for the two audio channels. The surrounding source and load should be matched appropriately to the published 10 dBV nominal level and 10 kΩ input and output specifications. The module can remain portable for field use or be secured through its surface-mounting provisions. Installation planning should account for its 2.05-by-2.90-inch footprint and mounted height of 1.44 inches. The specified ambient operating range is 0°C to 55°C, providing a defined environmental range for placement.

Performance Highlights

The AV-HK1 covers a frequency range of 20 Hz to 20 kHz within ±3 dB, spanning the stated audio band from low frequencies through high frequencies. THD+N is specified at less than 0.5% from 30 Hz to 20 kHz, with a published value of 0.05% at 1 kHz. Crosstalk is specified at less than 60 dB from 20 Hz to 20 kHz when measured with a 100 Ω source and 10 kΩ load, and less than 70 dB at 1 kHz. Together with the two 10 dBV nominal inputs and outputs, these figures provide concrete criteria for assessing the module within an unbalanced stereo audio system.

What Makes It Different

The defining feature of the AV-HK1 is its combination of unbalanced stereo galvanic isolation and a rugged, deployment-ready enclosure. It is not limited to a single placement approach: the unit is portable for changing field requirements and equipped for surface mounting when a fixed installation is preferred. The case is finished in RDL Dark ULTRASTYLE™ dark gray with beige lettering. Its listed WEEE weight is 0.44 pounds, while the shipping weight is 0.705 pounds. These details reinforce its role as a compact isolation module intended for straightforward handling and placement.

Final Assessment

For an unbalanced stereo audio path requiring ground-loop elimination, the RDL AV-HK1 provides a focused solution with two-channel galvanic isolation. Its 20 Hz to 20 kHz frequency response, published THD+N and crosstalk measurements, 10 dBV nominal operating level, and 10 kΩ input and output specifications give system designers concrete integration data. The rugged field case supports portable use, while the surface-mounting provision accommodates fixed installations. The AV-HK1 is a strong match when stereo ground isolation, defined audio performance, compact dimensions, and flexible physical placement are the central requirements.