Signet DL50/K, DL50 Installation And Setup Manual

Approved Document No. DAU0000050 Rev 2 • Page 1

DL50/K

AUDIO-FREQUENCY
INDUCTION LOOP KIT

INSTALLATION &
SET-UP MANUAL

Please read these instructions carefully before
installing your DL50 induction loop system

About this kit .............................................................................................. 2

What is an induction loop system? .......................................................... 2

Familiarisation with your DL50 induction loop amplifier ...................... 3

Planning the system .................................................................................. 4

Safety precautions ...................................................................................... 6

Connecting the unit ................................................................................... 6

System set-up and testing ......................................................................... 8

Troubleshooting ......................................................................................... 10

Technical specification .............................................................................. 11

© Errors and omissions excepted. The manufacturer of this equipment operates a policy of continuous
improvement & reserves the right to alter product specifications at its discretion & without prior notice.

Approved Document No. DAU0000050 Rev 2 • Page 12

Induction loop systems allow hearing impaired people to hear more clearly.

Most hearing aids have a ‘T’ or ‘MT’ switch which allows them to pick up the
electromagnetic field generated by a telephone earpiece. This signal is converted by the
hearing aid into a sound suited to its user’s specific hearing requirements.

An induction loop system uses this same principle but generates a much larger magnetic
field than that created by a telephone earpiece and radiates it around a room via a ‘loop’ of
cable. Any hearing impaired person positioned within the loop can hear the loop signal by
switching their hearing aid to the correct position.

An induction loop system therefore comprises four main elements:-

The audio source – typically a microphone, a television or a radio (or any combination of these).

The induction loop amplifier

The loop – a single turn of wire usually run around the perimeter of the room.

The receiver(s) – any behind-the-ear type hearing aid with a ‘T’ or ‘MT’ switch.

The Disability Discrimination Act has led to an increasing number of induction loop systems
being fitted in cinemas, theatres, churches, post offices, etc, allowing people with hearing
difficulties to participate fully in general conversation, public performances and other
social/work related activities. This kit, specially designed by one of the UK’s leading
manufacturers of induction loop equipment, helps you to bring these same benefits into
the comfort of your own home.

About this kit

What is an induction loop system?

This kit includes everything you need to create a high quality stand-alone loop system for a
living room, bedroom, TV lounge, study or any other room up to 7m x 7m (23ft x 23ft) in size.

Please ensure that the following accessories are included in your kit:-

1 x DL50 audio frequency induction loop amplifier

1 x Plug-top power supply

1 x 33m (108ft) reel of induction loop cable

1 x SCART to phono audio connection lead

1 x Microphone c/w 1.5m (5ft) lead and mounting attachments

1 x Installation manual (i.e. this manual)

1 x Accessory pack containing four stick-on cabinet feet and a small flat-headed screwdriver

Should any of the above items be missing, please contact your vendor.

Approved Document No. DAU0000050 Rev 2 • Page 2 Approved Document No. DAU0000050 Rev 2 • Page 11

Technical specifications

POWER REQUIREMENTS 12V a.c. 1.5A max (via plug-top power supply)

MAX. COVERAGE AREA 50 square metres (7m x 7m or 23ft x 23ft)

CONTROLS Input signal level control

Tone control (boost +16dB; cut -20dB at 1KHz)

Loop signal control

Microphone priority control

(all controls are screwdriver adjustable to prevent them being

accidentally altered once they have been set up)

INDICATORS Power on (green)

Input signal (red)

Loop strength meter (green to yellow to red)

INPUTS Two 3.5mm mono microphone inputs with phantom power

Two phono (line level) inputs

Alert trigger input - normally open (close to trigger)

OUTPUTS One loop output (via push-and-hold connector) - only use the

loop cable supplied with your DL50/K kit

One headphone output (confirms audio input signal level)

DIMENSIONS 40mm (Height)

85mm (Depth)
185mm (Width)

WEIGHT 550g (amplifier only)