Williams Sound HED 027 – Heavy-Duty Folding Mono Headphones for Assistive Listening

Product Overview

The Williams Sound HED 027 is a heavy-duty, folding mono headphone designed for shared-use assistive listening deployments in commercial AV environments. With a 40 mm driver, 16-ohm impedance, and a folding design for compact storage, the HED 027 is built for high-rotation use in venues such as houses of worship, courtrooms, tour facilities, and conference centers. The mono output is appropriate for FM and IR assistive listening system receivers that output single-channel audio. Replacement earpads (EAR 035) are available separately to extend service life in high-throughput programs.

Product Description

The HED 027 mono headphones are constructed to withstand the rigors of frequent shared use in assistive listening programs. The folding design allows receivers and headphones to be stored compactly in carry cases or charging racks between sessions. At 102 grams and a 7-7/8 x 5-5/8 x 1-1/4 inch folded form factor, the HED 027 stores efficiently in bulk. The 40 mm driver delivers 96 dB sensitivity at 1 kHz with a maximum power input of 100 mW — appropriate for the output stage of Williams Sound FM, IR, and personal listening receivers. The 16-ohm nominal impedance matches the standard output impedance of Williams Sound receiver models. The 39-inch mono cord with 3.5 mm mono plug connects directly to single-output receiver jacks. Frequency response of 20 Hz to 20 kHz covers the full audible range, with the speech frequencies most important for hearing assistance applications well within the flat portion. The adult-sized ear cup sizing is appropriate for the broadest range of users in a shared-use program. Replacement earpads are available as EAR 035 (one pair) for hygiene maintenance and extended wear life.

Key Features

• Folding Design — Compact storage for bulk deployment in carry cases and charging racks.
• 40 mm Driver — Delivers clear mono audio at 96 dB sensitivity for assistive listening system outputs.
• 16-Ohm Impedance — Compatible with Williams Sound FM, IR, and personal listening receiver outputs.
• Heavy-Duty Construction — Built for repeated handling in high-rotation shared-use programs.
• 39-Inch Mono Cord — Standard length for clip-worn or pocket-carried receiver configurations.
• Replaceable Earpads — EAR 035 earpads available separately for hygiene maintenance and service life extension.
• Adult Sizing — Sized for the broadest range of adult users in shared-use environments.
• 100 mW Max Input — Handles standard portable receiver output levels without distortion.

Technical Specifications