CLD1 Induction Loop Driver, Tie Clip Mic & Loop Coil


The CLD1 Compact Loop Driver is designed for counter systems and small area perimeter loop systems. Measuring only 5 x 2.9 x 1.4 in. (128 x 74 x 35 mm) and with an output current of 2.4 A (RMS), the CLD1 is the smallest and highest performance amplifier in its class. Based on proven and highly reliable technology it is backed by a 5 year warranty and Listen technical support. The CLD1 offers certainty of performance and the lowest lifetime cost available.

Audio quality is ensured with metal loss correction (MLC) combined with usual high standards of design. The CLD1 is designed for flexibility and convenience, featuring two (2) separate microphone inputs with independent level controls, one of which can be configured as a line input. All cable connections are made on a single face of the unit, adding flexibility and further simplifying installation.

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One (1) CLD1 Compact Loop Driver
One (1) EM195A Tie Clip Microphone with Omni-Directional Pickup
One (1) GE00001 Multi-Turn Preformed Loop for CDL1
One (1) Handbook and Installation Instructions
One (1) 12 VDC Power Supply (North America)


  • Low lifetime cost
  • 5 Year warranty
  • Very compact
  • Two (2) independent inputs featuring one (1) microphone input and one (1) switchable microphone/line input
  • Metal loss compensation
  • All connections to a single face for installation convenience

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 InputUnbalaced 3.5mm Mono Connector for Electret Micorphone, 6 VDC Bias
Line InputSwitchable Line/Microphone, Unbalaced 3.5mm Mono Connector


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


Drive Current IndicationFront Panel LED Indicates Current Peaks


Loop Connector/sLevel Cable Clamp


Perimeter Loop - Coverage1:1 Aspect Ratio - 215 sq ft. (20 m²), 2:1 Aspect Ratio - 323 sq ft. (30 m²), 3:1 Aspect Ratio - 377 sq ft. (35 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


VOX SwitchingTo control prioritization of micorphone 1 input
ComplianceUL Listed
Power12 VDC, 1.0 A, 18 W, 45-65 Hz, Power Switch/Led on Front Panel
Drive Voltage3.2 V (RMS), 4.5 V Peak at Maximum Output Current
Drive Current2.4 A (RMS), 3.4 A (Peak) with 1 kHz Sine Wave
Drive Current PeaksShort Term > 4.8 A


Width5.0 in. (128 mm)
Height1.4 in. (35 mm)
Depth2.9 in. (74 mm)
Shipping Weight2.2 lbs. (0.99 kg)
MountingFreestanding, Wall Mounting
Cable Length10 AWG - Max distance at full current -268 ft. (82 m), 14 AWG - Max distance at full current -247 ft. (75 m), 18 AWG - Max distance at full current - 168 ft. (51 m), 22 AWG - Max distance at full current - 94 ft. (29 m), FB1.8 - Max distance at full current - 328 ft. (100 m)
Weight1.0 lbs. (454 g)


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