CONTACTA Flush Hearing Loop for Door Entry Systems

The CONTACTA Flush Hearing Loop is a dedicated audio accessory designed for use with door entry systems, delivering clear audio directly to hearing device wearers. This flush-mounting module ensures that visitors and staff with hearing aids receive crisp, intelligible sound without background noise or interference, making it an essential addition to any accessible building or facility.

Engineered for reliable performance, this hearing loop meets IP55 ingress protection in correct installations, safeguarding internal components against dust and water jets. It accepts input signals from a variety of sources including pre-recorded sound sources (line out signals), low-voltage loudspeaker outputs, VoIP audio adapters, intercom systems, and PA systems, offering flexible integration with existing door entry setups.

The module features Automatic Gain Control (AGC) , which self-adjusts to accommodate variations in input level, ensuring consistent audio output at all times. With a constant-current loop drive, it delivers a stable magnetic field for optimal hearing aid compatibility. The ohmically isolated audio line input prevents ground loops and interference, while internal LED indicators display both drive and loop fault conditions for easy troubleshooting. The frequency response is compliant with IEC 60118-4 in correct installations, guaranteeing high-quality sound transmission.

Specifications

With low power consumption, the loop draws just 14V DC 2.14A via a 2.1mm connector from a compatible CA-10-02 unit or host system. It includes a UK mains plug (Type G) for straightforward connectivity. The faceplate measures 140x140x3mm, and the recessed box measures 110x110x42mm, with a total weight of 218g. Inputs are available via a 3.5mm TRS audio jack and screw terminals on a 2.54mm euroblock, while output is via screw terminals on a 5mm 2-way euroblock. The loop drive is constant current, bounded,