CLS2 Induction Loop Driver (4.9 Amps)


The CLS2 is a professional induction loop driver capable of driving loop areas in excess of 4,300 sqft. (400 m²) with an unsurpassed clarity of sound for both music and speech for superior intelligibility. Designed for simple discrete installation, the CLS2 offers the most cost effective and capable solution in its class. The driver is very compact and designed specifically for wall mounting. All connections and controls are secured behind a tamper resistant, hinged, detachable cover. Combined with its small size, the range of mounting and cabling options ensure that installation is convenient and tidy in any environment. Input options are comprehensive, with three independent inputs for balanced microphone, balanced and unbalanced line, low impedance and 100V line speaker systems.

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One (1) CLS2 Induction Loop Driver (4.9 Amps)
One (1) Handbook and Installation Instructions
One (1) “T” Logo Installed Adhesive Sign – Large (11.7″ x 8.3″)
One (1) P-clip, Nut and Washer


  • Area coverage to 4,300 sqft. (400 m²)
  • Designed for simple discrete installations
  • Simple and fast installation
  • Wall mounted
  • Low lifetime cost
  • Excellent proven reliability
  • 5 year warranty
  • Unparalleled sound quality and intelligibility
  • Speech optimized gain control
  • Metal loss corrector corrects frequency dependent loss from metal structures

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
Alert/sAlert 1: When energized, turns down the other inputs and produces a 520 Hz square ware tone on the loop. Min/Max Input Voltage 5-24 V AC/DC, Alert 2: A pair of contacts which when shorted turns down the other inputs and produces a pulsed 520 Hz square wave tone on the loop.


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


LEDsAGC is Activated, Loop Current, Power
Drive Current IndicationLED


Loop Connector/sScrew Terminal


Input/sInput 1: Balanced Mic/Line (-73/-31 dBu), 12 VDC Phantom Power, Input 2: Balanced Line (-33 dBu), 12 VDC Phantom Power, Input 3: Balanced Line, (-31 dBu), Input 4: Isolated 100 V/ Low Impedence Mono/Stereo Speaker, Input Impedance (Ohms) 120k, 120k, 7.8k, Min Level (dBu) +14/+14/-9, Max level (dBu) +47/+47/+27


Perimeter Loop - Coverage1:1 Aspect Ratio - 2,690 sq ft. (250 m²), 2:1 Aspect Ratio - 3,337 sq ft. (310 m²), 3:1 Aspect Ratio - 4,300 sq ft. (400 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
Min/Max Loop Resistance0.2/1.3 Ohms


ComplianceETL Listed
Power230/115 VAC, 30W, 45-65 Hz, Connected via Chassis Screw Terminals
Drive Voltage6.4 V (RMS) at Maximum Output Current
Drive Current4.9 A (RMS), 7.0 A (Peak) with 1 kHz Sine Wave
Drive Current PeaksShort Term > 10 A
Input Power FuseT250 mA


Width7.9 in. (200 mm)
Height1.7 in. (44 mm)
Depth7.9 in. (200 mm)
Shipping Weight5.1 lbs. (2.31 kg)
MountingVertical Panel Mounting
Cable Length10 AWG - Max distance at full current - 232 ft. (71 m), 14 AWG - Max distance at full current - 214 ft. (65 m), 18 AWG - Max distance at full current - 146 ft. (44 m), 22 AWG - Max distance at full current - 81 ft. (25 m), FB1.8 - Max distance at full current - 286 ft. (87 m)
Weight4.0 lbs. (1.81 kg)


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