Ampetronic ILD122

The Ampetronic ILD122 professional induction loop amplifier provides coverage in excess of 200m² with exceptional sound quality for both music and speech. 

As coverage varies according to room aspect ratio, please contact us with your room dimensions for advice. 

The ILD122 loop driver offers 3.5A rms output with metal loss correction circuitry and is suitable for an induction loop for a theatre, church or other large area such as a theatre or lecture hall.

Supplied with a loop connector, loop present sign, mains cable, handbook and installation instructions. The manufacturer also freely offers technical support for all your installation queries in addition to our in house technical backup.


  • Area coverage to >200m2
  • Low lifetime cost
  • Excellent proven reliability
  • 5 year warranty
  • Unparalleled 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 suited to long cable lengths
1U Loop
List Ex VAT: £531.80
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35 W 230 V AC nominal, 45-65 Hz [120 V option available]
Power switch and LED indicator on front panel

Microphone input

XLR balanced microphone input for 200-600 Ω microphones;
15 dB user selectable gain boost; + 15 V DC phantom power (selectable); sensitivity – 70 dBu; front panel recessed gain control

Line input

6.4 mm jack socket balanced line input; sensitivity – 30 dBu; overload protected; front panel recessed gain control

Slave I/O

6.4 mm jack insert point for connection of SP5 phase shifter
0 dBu signal can be used for recording



Drive voltage

7.12 Vrms (10V peak) at maximum output current

Drive current

• 3.5 Arms (5 Apk) continuous 1 kHz sine wave
• Short term peaks >7 Apk
• Front panel recessed control
• Drive current indicated on 4-LED display in 3 dB increments

Loop connector

Wieland ST17/2 (supplied)

Loop Monitor

Provides access to actual audio signal in loop via a 3.5 mm stereo headphone connector on front panel



Freq. response

80 Hz to 6.5 kHz



Automatic Gain Control

The AGC is optimised for speech. Range >36 dBu
Front panel recessed input level control

Metal loss correction

Corrects system frequency response due to metal structures in a building. Gain constant at 1 kHz, adjustable gain slope from
0 to 3 dB per octave
This does not compensate for signal loss from metal structures, which can be significant



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


To supply Ampetronic ancillary units
±15 V DC 0.15 A power outlet on rear panel


Cooling is by natural convection from product casing




Half width 1U 19" rack mount
Width 215 mm Depth 220 mm Height 44 mm

Mounting options

• Freestanding
• 1U 19" rack mount (requires additional rack tray)
• Wall mounting (requires additional brackets)




IP 20 protection; 20 to 90% relative humidity; 0 to 35 ºC

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