HLD2

Contacta HLD2 - 1 to 1 Hearing Loop Driver

The Contacta HLD2 is a modern, microprocessor-controlled audio driver designed for individual assistive listening systems. It plays a key role in Contacta’s 1 to 1 induction loop setups, delivering clear and intelligible audio to hearing aid users equipped with a T-coil. With its compact design and advanced signal processing, the HLD2 is ideal for customer service desks, reception areas, ticket counters, and other locations requiring personalized hearing support.

Functionality

• Amplifies and processes audio for counter induction loops
• Automatic Gain Control (AGC), compression, and noise gate
• Continuous self-monitoring of system and loop performance
• Energy-saving mode triggered by lack of acoustic activity
• Supports electret microphones and optional line-level sources
• Compliant with IEC 60118-4 (when correctly installed)

Features

• Microprocessor-controlled operation for precise performance
• Transformer-isolated symmetrical line input (optional)
• Loop output: 2Arms @ 1kHz, 4Vrms @ 1kHz
• Frequency response: 100Hz- 5kHz (±3dB)
• Distortion: better than -40dB at nominal input
• Dynamic range: 40dB, attack time: 10ms, release time: approx. 10s
• Three-color LED indicators for power, input, and output diagnostics
• Connection for LED halo microphone
• Power supply: 14V DC, 2.14A (PS-55 sold separately)
• Connectors: 3.8mm Phoenix screw terminals (mic, line, loop)

The HLD2 combines reliability, energy efficiency, and advanced functionality, making it an ideal choice for professional AV installations in public and commercial spaces.