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Listen Technologies Induction Loop Driver Professional ASL Amplifier | 3.5 Amps | Rack/Shelf Mount

Listen Technologies Induction Loop Driver Professional ASL Amplifier | 3.5 Amps | Rack/Shelf Mount

SoundPro Item: 57045 | Part Number: ILD122

$1,227.40
$1,292.00 $1,227.40
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MSRP: $1,292.00 | MAP: $1,227.40

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  • Three Independent Audio Inputs Accommodate Mic, Line, And Speaker-Level Sources In One Chassis
  • Speech-Optimized Automatic Gain Control Maintains Consistent Output Across Dynamic Vocal Range
  • Metal Loss Correction Circuit Compensates For Frequency Attenuation From Building Structures
  • Tamper-Resistant Hinged Cover Secures All Connections And Controls After Commissioning
  • Vertical Panel Mounting Design Enables Discreet Installation In Equipment Closets And Back-Of-House Areas
  • Five-Year Manufacturer Warranty Backed By Technical Support For Long-Term System Reliability
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Engineered for integrators installing assistive listening systems in ADA-compliant venues, this professional induction loop driver provides reliable telecoil compatibility for hearing aid and cochlear implant users. The compact enclosure mounts vertically on any wall surface with tamper-resistant access to all connection points and calibration controls. Automatic gain control optimized for spoken word maintains consistent signal strength across dynamic speech patterns, while the metal loss corrector compensates for frequency-dependent attenuation caused by steel rebar, HVAC ducts, and structural beams.

Three independent input stages accept balanced microphone sources with phantom power, balanced and unbalanced line-level feeds, and direct connection from distributed 100V speaker systems or low-impedance zones. Front-panel LED indicators confirm loop current flow and AGC activation status during commissioning and routine verification checks. The driver operates from standard branch circuits and includes mounting hardware, installation documentation, and large-format telecoil signage for occupant notification.

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Specifications

Certifications
Compliance
ETL Listed
Environmental Protection
IP20 Protection
Dimensions
Width
8.5"
Height
1.7"
Depth
8.7"
Weight
Product Weight
5.0 lbs
Shipping Weight
6.2 lbs
Electrical
Power
120 VAC, 35W, 45-65 Hz
Drive Voltage
7.1 V (RMS) at Maximum Output Current
Drive Current
3.5 A (RMS), 5.0 A (Peak) with 1 kHz Sine Wave
Drive Current Peaks
Short Term > 7 A
Ancillary Power
± 15 VDC, 0.15 A, Power Outlet to Power Accessories
Audio
Frequency Response
80 Hz to 6.5 kHz ± 3 dB
Distortion
THD+N < 0.2 %, 1 kHz Sine Wave at Full Current
Automatic Gain Control
Optimized for Speech, Dynamic Range > 36 dB
Microphone Input
XLR Balanced, -70 dBu Input, 200-6000 Ohms, +15 VDC Phantom Power
Line Input
1/4" (6.4 mm), -30 dBu Input, Overload Protected
Connectivity
Slave I/O
1/4" (6.4 mm), Insert Point for SP5 90° Audio Phase Shifter, 0 dBu
Loop Connector
Wieland ST17/2
Performance
Perimeter Loop Coverage
1:1 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)
Coverage Conditions
Loop must be 3-6 ft (1-2 m) above or below the receiver height, No metal structures in the plane of the loop, Sufficient voltage to drive the loop
Construction
Mounting
Freestanding or Shelf Mounted
Cooling
Natural Convection
Cable Length Compatibility
10 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)
Controls
Gain Control
Front recessed input level control
Metal Loss Correction
Correct system frequency response due to metal structures
Indicators
Drive Current Indication
4-LED Display Front Panel, 3 dB Increments
Fault Monitoring
LED Fault Indicators, Overload, Overhead, Loop Error
Remote Fault Monitoring
Relay Contacts
Power Switch
LED on Front Panel
Environmental
Operating Temperature
32°F (0°C) to 95°F (35°C)
Relative Humidity
20 to 90%
Included Items
Included Accessories
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

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