Datasheet
ILD122 Professional Audio Induction Loop Driver
The ILD122 is a professional audio induction loop driver capable of driving loop areas in excess of 200m2 with an
unsurpassed clarity of sound for both music and speech for superior intelligibility. Based on proven and highly reliable
technology it is backed by an unrivalled 5 year warranty and free technical support. Improved power output provides
outstanding value without compromise. It boasts all the usual features found on Ampetronic equipment such as
metal loss correction and is compatible with our
unique Ultra-Low Spill™ technology. The ILD122 is
very compact and elegant, suitable for freestanding,
wall mounting or rack mounting.
Perimeter Loops – Area Coverage (maximum)
Features
• Area coverage to >200 m2
• Low lifetime cost
• Excellent proven reliability
• 5 year warranty
• Unparalled sound quality
• Excellent intelligibility
• Speech optimised gain control
• High voltage headroom avoids high
frequency clipping
• Metal loss corrector corrects frequency
dependent loss from metal structures
• Very compact: 215 x 220 x 44mm
• Microphone (XLR) and line inputs
• Extensive input adaptors available for any
audio input requirements
• Free technical support line for advice,
design and install
• High voltage headroom ideally suited to
arrays and long cable lengths
Applications include:
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Conference facilities
Theatres
Sports halls
Educational environments
Confidential rooms
Courts
Lecture Halls
Room aspect ratio
1:1
2:1
3:1
Maximum area m2
120
150
200
For any Induction Loop System, area coverage is dependent on
several factors. Please check these assumptions and contact Ampetronic
for advice if required:
• loop must be 1-2m above or below the receiver height
• there should be no metal structures in the plane of the loop
• sufficient voltage to drive the loop – check the cable table below
Low Overspill or Low Loss Systems
ILD122 amplifiers are designed for use in combination with Ampetronic
Ultra-Low Spill™ technology. This will require an SP5 phase shifter and an
array design – Ampetronic can provide designs or guidance for any application.
Used to drive an array, two ILD122s can:
• minimise ‘spill’ – confines signal to within 1.5m of room, suitable for
adjacent rooms e.g. cinemas, classrooms, or confidential rooms
• compensate for high losses due to metal structures – the only
effective solution for high loss environments to meet IEC60118-4
Maximum Cable Length
The ILD122 is designed for SINGLE TURN loops for optimum audio quality:
• Loops with DC resistance from 0.2 to 1.8 Ω
• Impedance up to a maximum of 2.0 Ω
Maximum cable length is dependent on cable type and on the application :
Cable type
Maximum Total Cable Length (m)
Normal use*
1.0mm2
Transient speech*
copper
76
87
2.5mm2 copper
103
131
4.0mm2 copper
108
140
1.8mm2
133
155
flat copper tape
* Short term speech (e.g. service counter, airport PA system) can cope with limited clipping at high
frequencies – Ampetronic recommends delivery of full current up to 1.2kHz for these applications.
Longer term usage or signals with music or high quality audio must deliver full current to at least
1.6kHz to prevent fatigue and give acceptable intelligibility. Many commercially available systems do not
deliver sufficient voltage to reproduce critical high frequencies – ask Ampetronic for more details.
ILD122 Product Information
INPUTS
Power
35W 230V AC nominal, 45-65Hz [120V option available]
Power switch and LED indicator on front panel
Microphone input
XLR balanced microphone input for 200-600Ω microphones;
15dB user selectable gain boost; + 15V DC phantom power
(selectable); sensitivity – 70dBu; front panel recessed gain control.
Line input
6.4mm jack socket balanced line input; sensitivity – 30dBu;
overload protected; front panel recessed gain control.
ILD122 optional accessories
Slave I/O
Ampetronic can supply a range of accessories to meet the specific
needs of your installation:
6.4mm jack insert point for connection of SP5 phase shifter
0dBu signal can be used for recording
OUTPUTS
Microphones
A range of microphones can be supplied or
specified for most applications on request
Drive voltage
7.1Vrms (10V peak) at maximum output current
Input adaptors
Drive current
A range of input adaptors and interface
cables to accept most audio source inputs,
see table below
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Installation accessories
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Wall mount brackets
WML-1U
Equipment supplied as standard with the ILD122
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Handbook and installation instructions
197 x 252mm loop system present sign (deaf logo)
Region specific mains cable
Loop connector
18mm x 0.25mm copper tape
PVC extrusion to protect copper tape
Installation / warning tape to fix cable or tape to a floor
3.5 Arms (5A peak) continuous 1kHz sine waves
Short term peaks >7A peak
Front panel recessed control
Drive current indicated on 4-LED display in 3dB increments
Loop connector Wieland ST17/2 (supplied)
Loop Monitor
Provides access to actual audio signal in loop
3.5mm stereo headphone connector on front panel
AUDIO SYSTEM
Rack mount brackets RM-1U
Freq. response 80Hz to 6.5kHz
Phase shifter
Distortion
THD + N<0.2% 1kHz sine at full current
Automatic The AGC is optimised for speech. Range >36dBu
Gain Control
Front panel recess input level control
Metal loss
correction
Corrects system frequency response due to metal structures in
a building. Gain constant at 1kHz, adjustable gain slope from
0 to 3dB per octave.
This does not compensate for signal loss from metal structures
which can be significant.
SP5 for an array system – use of and SP5
requires a design which can be provided
by Ampetronic
Input adaptors and preamplifiers
By using the appropriate input adaptor or preamplifier the ILD122 will
accept multiple additional inputs or audio inputs from other sources:
Input type
Adaptor
Additional microphone and / or line inputs
MP101 / MP221 / MP522 mixers
and preamps can drive up to
5 mics + 2 line inputs
70V / 100V line input ATT100 adaptor
40V / 70V / 100V line inputs, with transformer isolation
ATT T series adaptors
Low impedance speaker line
ATT30 adaptor
Unbalanced microphones
MAT1 adaptor
Standards compliance
The ILD122 is CE marked to all relevant safety and EMC standards.
All Ampetronic amplifiers can be used to create a system that meets
the requirements of IEC118-4 and the relevant recommendation of
BS7594, however the design and installation of the system is equally
important to meet these Induction Loop standards.
Some Ampetronic products are CSA registered for sale in the USA
and Canada – contact Ampetronic for details.
ADDITIONAL FUNCTIONS
Fault Monitoring
Three LED fault indicators on the front panel:
• Overload – delivering over the rated current
• Overheat – unit is too hot (mutes output signal)
• Loop error – short circuit / open circuit error
Ancillary
To supply Ampetronic ancillary units
±15V DC 0.15A power outlet on rear panel
Cooling
Cooling is by natural convection from product casing
PHYSICAL
Size
Half width 1U 19" rack mount
Width 215mm Depth 220mm Height 44mm
Mounting options
• Freestanding
• 1U 19" rack mount (requires additional rack tray)
• Wall mounting (requires additional brackets)
Weight
2.25kg
Environment
IP20 protection; 20 to 90% relative humidity; 0 to 35ºC
www.ampetronic.com
sales@ampetronic.com
support@ampetronic.com
phone +44 (0)1636 610062
fax +44 (0)1636 610063
Issue no ILD122 UP32501-7
Northern Road, Newark NG24 2ET. United Kingdom
DISTRIBUTOR
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