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Contacta Under The Counter Loop System, including HLD2 loop amplifier, Gooseneck Halo microphone, loop aerial, power supply, fixings set and loop signage
Woman speaking to someone at a counter with the Contact Under The Counter Loop system

Contacta Under The Counter Loop System

£185.90  exc. VAT
£223.08 inc. VAT 
SKU: LL631

The Contacta “Under the Counter” loop kit is a complete system designed for under the counter installation and is most suitable for ticket counters, reception desks, and other point of sale locations. 

This complete system comprises of a loop amplifier, noise-cancelling microphone, flexible loop aerial, signage and fixings.

For use in any situation where one to one communication takes place at a counter, booth or desk, for example: Banks, Post offices, Supermarkets, Theatres, Information Centres, and Airports.


  • Complete kit ready for installation;
  • Microprocessor controlled;
  • Energy-saving ‘green’ standby mode achieves 80% power saving;
  • Advanced audio processing features AGC, compression, and noise gate;
  • Constant-current loop drive;
  • Continuous self-testing;
  • Isolate audio line input allows the driver to take alternative audio sources (optional);
  • Power and LED status indicators.


  • 1 HLD2 loop amplifier;
  • 1 Gooseneck Halo microphone;
  • 1 Loop aerial;
  • 1 Power supply;
  • 1 Fixings set;
  • 1 Loop signage.


 Product Sheet

Technical Information

HLD2 Loop amplifier
Dimensions (H x W x D): 116 x 116.2 x 40mm
Weight: 300g
Construction: ABS Plastic Construction Housing
Finish: Matt Black, Fine Texture
Inputs: Input 1 (Microphone): Screw terminals on 3.8mm 2 pole Phoenix connector. Single-ended electret microphone, powered by 5V via 2.2K ohms
Input 2 (Line) (Optional): Screw terminals on 3.8mm 2 pole Phoenix connector. Transformer isolated, 0dBu into 1K ohms, may have series resistance added for optional 75V or 100V line inputs
Power: Centre positive power jack, 14V DC 2A via 2.1mm from our P55 power supply unit
Loop output: Loop connection: Screw terminals on 3.8mm 2 pole Phoenix connector
Loop drive current: 2A RMS compliance current @ 1Khz sine wave
Loop drive voltage: 4V RMS compliance voltage @ 1KHz sine wave
Audio: Frequency response: 100 Hz – 5kHz (±3dB)
Distortion: Better than -40dB, inputs at nominal level
Automatic gain control: Processor controlled: Dynamic range: 40dB typical. Attack time: 10 milliseconds. Release time: typically 10 seconds, varies with program content
Indications: Status LEDs: 3 colour LEDs indicate power, input and output diagnostic information. Connection provided for our LED halo indicator microphone
Self-Test: Microprocessor controlled: Unit, including microphone and loop connections is continuously monitored and internal and external LED indicators are updated
Energy saving: Sound activated: Unit will enter low energy “sleep” mode when acoustic conditions indicate lack of usage

Gooseneck Halo microphone
Dimensions (H x W x L): 70 x 40 x 100mm
Weight: Plastic stem: 65g, Brass stem: 80g
Construction: Plastic stem: ABS Plastic, Brass stem: ABS Plastic & Brass
Finish: Plastic stem: Pin Seal Fine Texture, Brass stem: Pin Seal Fine Texture & Satin Black
Directional response: Omni-directional
Frequency response: 70Hz – 20KHz
Sensitivity: 46dB @ 1KHz
Distortion: Typically less than 1%