ILD122 Induction Loop Driver (3.5 Amps)


The ILD122 is a compact (one-half RU) professional audio hearing loop driver capable of driving loop areas in excess of 2,150 sqft. (200 m²) 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 a 5 year warranty and Listen technical support. Improved power output provides outstanding value without compromise. It boasts all the usual features such as metal loss correction and is compatible with our unique Ultra-low Spill™ technology. The ILD122 is a compact and elegant unit suitable for freestanding, wall mounting or rack mounting.

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One (1) ILD122 Professional Loop Driver (3.5 Amps)
One (1) “T” Logo Installed Adhesive Sign – Large (11.7″ x 8.3″)
One (1) Line Cord (North America)
One (1) Wieland ST17/2 Connector
One (1) Handbook and Installation Instructions


  • Area coverage to 2,150 sqft. (200 m²)
  • Low lifetime cost
  • Excellent proven reliability
  • 5 year warranty
  • Unparalleled sound quality and intelligibility
  • Automatic gain control optimized for speech
  • High voltage headroom avoids high frequency clipping
  • Metal loss corrector corrects frequency dependent loss from metal structures
  • Rack mount brackets optional
  • Microphone (XLR) and line inputs
  • Extensive input adaptors available for any audio input requirements

Also Needed



Frequency Response80 Hz to 6.5 kHz ± 3 dB
DistortionTHD+N < 0.2 %, 1 kHz Sine Wave at Full Current
AGCOptimized for Speech, Dynamic Range > 36 dB
Microphone InputXLR Balanced, -70 dBu Input, 200-6000 Ohms, +15 VDC Phantom Power
Line Input1/4 in. (6.4 mm), -30 dBu Input, Overload Protected


Gain ControlFront recessed input level control
Metal Loss CorrectionCorrect system frequency response due to metal structures
CoolingNatural Convection


Drive Current Indication4-LED Display Front Panel, 3 dB Increments
Fault MonitoringLED Fault Indicators, Overload, Overhead, Loop Error
Remote Fault MonitoringRelay Contacts


Slave I/O1/4 in. (6.4 mm), Insert Point for SP5 90° Audio Phase Shifter, 0 dBu
Loop Connector/sWieland ST17/2
Ancillary± 15 VDC, 0.15 A, Power Outlet to Power Accessories


Perimeter Loop - Coverage1:1 Aspect Ratio - 1,290 sq ft. (120 m²), 2:1 Aspect Ratio - 1,615 sq ft. (150 m²), 3:1 Aspect Ratio - 2,150 sq ft. (200 m²)Condition 1 - Loop must be 3-6 ft. (1-2 m) above or below the receiver height, Condition 2 - There should be no metal structures in the plane of the loop, Condition 3 - There must be sufficient voltage to drive the loop


ComplianceETL Listed
Power120 VAC, 35W, 45-65 Hz, Power Switch/Led on Front Panel
Drive Voltage7.1 V (RMS) at Maximum Ouput Current
Drive Current3.5 A (RMS), 5.0 A (Peak) with 1 kHz Sine Wave
Drive Current PeaksShort Term > 7 A


Width8.5 in. (215 mm)
Height1.7 in. (44 mm)
Depth8.7 in. (220 mm)
Shipping Weight6.2 lbs. (2.8 kg)
MountingFreestanding or Shelf Mounted
Cable Length10 AWG - Max distance at full current - 357 ft. (109 m), 14 AWG - Max distance at full current - 330 ft. (101 m), 18 AWG - Max distance at full current - 224 ft. (68 m), 22 AWG - Max distance at full current - 125 ft. (38 m), FB1.8 - Max distance at full current - 436 ft. (133 m)
Weight5.0 lbs. (2.25 kg)


Relative HumidityIP20 Protection, 20 to 90% Relative Humidity, 32 F (0 C) to 95 F (35 C)
* Specifications subject to change without notice.