Dual-muff headset mic with TRRS 3.5mm lug. For Digi-Wave DLT 400

Ideal Use Cases

The Williams AV MIC 158 is designed for communication setups built around the Digi-Wave DLT 400. Its dual-muff configuration combines headphone listening and microphone pickup in one wired headset, making it suitable when a user needs to hear program audio while speaking through the same connected device. The specified 3.5 mm TRRS jack provides the connection format required for integration with the compatible Digi-Wave system.

This model is particularly relevant for deployments that require a unidirectional electret microphone rather than an unspecified or omnidirectional element. A 42-inch cord establishes a predictable cable length for planning individual stations, mobile setups, storage, and replacement inventory. Its published weight is 1.3 pounds.

Why Choose This Model

The MIC 158 brings together clearly documented microphone and headphone characteristics. The microphone has a 100 Hz–12 kHz frequency response, a signal-to-noise ratio greater than 50 dB, and a typical sensitivity of 45 dB ± 5 dB re 1 V/Pa at 10 cm. Its operating-voltage range is 1–10 VDC. These specifications provide concrete reference points when selecting a headset for an existing Digi-Wave DLT 400 configuration.

On the listening side, the headset uses 50 mm dynamic drivers with a stated frequency response of 10 Hz–20 kHz. Headphone impedance is 32 ohms, maximum SPL output is 96 dB, and maximum power input is 100 mW. Together, these published values make it easier to confirm the model’s electrical and acoustic requirements before deployment.

Installation and Integration

Integration centers on the attached 3.5 mm TRRS plug and the MIC 158’s stated compatibility with the Digi-Wave DLT 400. Insert the headset plug into the corresponding compatible connection and account for the 42-inch cord when arranging the user position or routing the cable. Because the specified connector is TRRS, it should be distinguished from other 3.5 mm connector formats when planning replacements or related equipment.

The manufacturer also identifies replacement components for two frequently handled areas of the headset. The specified replacement microphone screen is the WND 058, while the specified replacement earpads are the EAR 058. These model references help maintain consistent parts selection without relying on visually similar accessories.

Performance Highlights

The unidirectional electret microphone element provides a defined pickup pattern for voice input. Its 100 Hz–12 kHz response establishes the supported microphone frequency range, while the greater-than-50 dB signal-to-noise specification documents the relationship between the intended signal and background electrical noise. The listed sensitivity is 45 dB ± 5 dB re 1 V/Pa at 10 cm under typical measurement conditions.

The headphone section extends from 10 Hz to 20 kHz and is driven by a pair of 50 mm dynamic elements in the dual-muff headset format. The 32-ohm impedance, 96 dB maximum SPL output, and 100 mW maximum power input are important reference specifications for system matching and operation. Maximum ratings should be treated as operating limits rather than typical listening settings.

What Makes It Different

The MIC 158 is not simply a microphone or a set of headphones. It combines a specified unidirectional electret microphone, dual-muff listening design, 50 mm dynamic headphone drivers, and a 3.5 mm TRRS connection in one model intended for the Digi-Wave DLT 400. This defined compatibility is useful when standardizing equipment around that platform.

Williams AV provides specific identifiers for the replacement mic screen and earpads, supporting accurate maintenance planning. The headset carries CE and RoHS approvals and is covered by a 90-day warranty. Its listed box dimensions are 8.25 by 11 by 4.5 inches, providing an additional reference for storage, receiving, or shipment planning.

Final Assessment

The Williams AV MIC 158 is a focused choice for Digi-Wave DLT 400 users seeking a wired dual-muff headset with documented microphone, headphone, connector, and replacement-part specifications. Its unidirectional electret element, 50 mm dynamic drivers, 32-ohm headphone impedance, 42-inch cord, and 3.5 mm TRRS plug define exactly how it fits into a compatible communication setup. For installations aligned with these specifications, the MIC 158 offers a clearly identified headset and microphone solution backed by a 90-day warranty.