D-HA1A

RDL D-HA1A – Format-A Stereo Headphone Amplifier

The RDL D-HA1A is a professional stereo headphone amplifier designed for use in Format-A twisted pair systems. Wall- or panel-mounted, it provides local headphone listening from audio signals transmitted over CATx cable from a Format-A sender. It is ideal for hospitality, education, and commercial installations such as bedside or restroom listening stations.

The module receives stereo audio on pairs B and C and 24 V DC power via a rear-panel RJ45 jack. A high-quality stereo headphone amplifier ensures excellent audio fidelity and low noise. The front panel features a 3.5 mm mini-jack output and a user volume control. The unit has no illuminated indicators, making it suitable for dark environments.

Two RJ45 jacks allow daisy-chaining with additional Format-A receivers. The module is protected by an automatically resetting fuse. Its all-metal Decora®-style housing ensures durability and a professional appearance.

Functionality

• Receives stereo audio from Format-A (pairs B and C)
• Headphone amplifier with user volume control
• 3.5 mm stereo mini-jack output
• Powered via twisted pair from Format-A sender
• Daisy-chainable with other Format-A modules
• No illumination – ideal for dark rooms

Features

• Device type: Format-A stereo headphone amplifier
• Audio input: Format-A (pairs B and C via RJ45)
• Audio output: 3.5 mm stereo mini-jack
• Volume control: front-panel knob
• Power: 24 V DC via twisted pair
• Connectors: 2 × RJ45 (input/output)
• Protection: auto-resetting fuse
• Housing: all-metal, Decora® style
• Mounting: wall or panel
• Applications: hospitality, AV, education, listening stations

The RDL D-HA1A offers a compact, high-performance solution for local headphone listening in Format-A systems, with easy installation and professional-grade audio quality.