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)
