Britton Flag Ampetronic Audio Solutions for the UK

Z-LR-4200-IR Intelligent DSP Infrared Receivers

Ultrasensitive iDSP infrared receiver with programmable OLED display and rechargeable lithium battery. Compatible with neckloops or standard stereo headphones.

This iDSP (Intelligent Digital Signal Processing) infrared receiver if a high performing tool that is easy to use, store, maintain and integrate. An OLED display helps depict the unique channel information and receiver status.

A small and compact device that does not compromise on range or quality signal pickup the Z-LR-4200 infra red receiver also uses green battery technology that reduces the running costs of the devices. The IR receiver can be connected to a neck loop/lanyard or ear phones via two 3.5 mm output jacks.

A Micro USB is used to connect the devices to a free iDSP software suite to aid with set up, programming, inventory management, firmware updates and charging.

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  • High performance IR receiver providing the best pickup and range
  • May be used with an integrated lanyard which is sold separately. This is a digital signal processing (DSP) loop driver, which improves listening experience for T-coil users
  • Small device makes it easier to wear and use and for venues to dispense, store and maintain
  • OLED display which shows unique channel names, battery status, channel status, volume status and charge activation
  • Advanced green battery technology dramatically reduces costs of ownership
  • Use for single channel applications


  • Theaters
  • Boardrooms
  • Classrooms
  • Cinemas
  • Courtrooms
  • Houses of worship

Standards Compliance

StandardsFCC Part 15, ICS-03, CE, RoHS, WEEE



System Signal to Noise RatioMono: >60 dB, Stereo: >52 dB
System Distortion<2% total harmonic distortion (THD) at 80% deviation
System Frequency Response63 Hz - 15 kHz (±3 dB)
Audio Output JacksTwo (2) 3.5 mm (0.14 in.) connectors, unbalanced, 0 dBu nominal output level, 16 mW maximum, impedance 32 ohm, accepts mono or stereo phone plug or LA-430 Intelligent Ear Phone/Neck Loop Lanyard


User ControlsPower on/off and volume up/down
Set-up ControlsPress and hold up/down volume buttons for 5 seconds to enter channel adjust, use up/down to select channel
ProgrammingVia software and USB port, Auto Seek, Jack Sense, Squelch, Auto Power, Auto Off, Stereo, Brightness, Channel Name


LEDFlashes when batteries are low or to indicate charging, solid when fully charged
DisplayOLED - Channel designation, battery level, unit number, charging status, volume status


Carrier Frequencies2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz
Number of ChannelsFour (4) selectable channels
Frequency Accuracy± .005% stability 32 to 122 ºF (0 to 50 ºC)
ModulationFM Wideband, ±50 kHz deviation max, 50 uS de-emphasis


SensitivityBetter than one (1) nW/cm2 @40 dB SNR
SquelchProgrammable in 20 steps, automatic on loss of IR signal
Power Save ModeTurns unit off after a specified time of no IR signal, default is 30 minutes
Coverage Area30,000 ft² (2787 m²) single channel with LT-84/LA-141 or 40,000 ft² (3716 m²) single channel with LT-82/LA-140


Battery TypeLithium Ion
Battery Life8 Hours of typical use
Battery Charging TimeFully charged in 2.5 Hours
Power SupplyMicro USB connector, 5 V, 500 mA


Dimensions (H x W x D)3.75 x 2.0 x 0.64 in. (9.6 x 5.0 x 1.7 cm)
Dimensions with Belt Clip3.75 x 2.0 x 0.80 in. (9.6 x 5.0 x 2.1 cm)
Shipping Weight3.5 oz. (99.2 g) with a 1 lbs. (0.45 kg) minimum
Unit Weight1.9 oz. (53.9 g)
Unit Weight with Batteries2.8 oz. (79.4 g)
ColorFlat Black


Temperature - Operation14 to 104 ºF (-10 to 40 ºC)
Temperature - Storage(-)4 to 122 °F (-20 to 50 °C)
Relative Humidity0 to 95% relative humidity, non-condensing


Ampetronic are pleased to announce that we will be offering the award winning new WiFi Audio streaming system.
The class leading performance of the new iDSP Infrared System really is the sum of its outstanding parts!
Assistive Listening Systems are a special type of sound system designed specifically to help people with hearing loss access audio services in public places by connecting them directly.
Ampetronic are world leaders in the design and manufacture of assistive listening systems and audio solutions.