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Overview

The LR-4200-IR receiver from Listen Technologies offers outstanding audio clarity and quality with the best range and reception in its class.

Part of our Intelligent Digital Signal Processing (iDSP) line, the LR-4200-IR is the smallest device of its kind, resulting in a compact unit that won’t burden the end user. An integrated neck loop/lanyard makes each receiver easy to wear, and the DSP loop driver offers an improved listening experience for anyone with a T-coil-equipped hearing aid. Dual 3.5mm output jacks also allow receivers to be shared between users.

Each receiver is also equipped with a micro USB connection, making it easy for venues to charge and update the units via any standard USB port.

Extended speaking sessions, presentations and more can be challenging for other devices, but the LR-4200-IR incorporates advanced rechargeable batteries that offer long life and reliable power. Charge status, along with channel information and volume level, are easy to read on the integrated OLED display.

From corporate environments to conference proceedings and beyond, the LR-4200-IR is an outstanding receiver choice for any venue looking to offer convenient, reliable assistive listening.

Includes

One (1) LR-4200-IR Intelligent DSP IR Receiver*

 

*The LR-4200-IR comes with a quick start guide and a non-proprietary field replaceable Lithium-ion battery.

Highlights

  • High performance IR receiver offering best-in-class sensitivity and range
  • Integrated neck loop/lanyard with DSP loop driver for an enhanced T-coil listening experience
  • Smallest device of its kind makes it easier to wear and use and for venues to dispense, store and maintain
  • OLED display showing channels, battery status, channel status, volume level, and more
  • Lanyard and belt clip options offer convenient and discreet choices for the end user
  • Advanced rechargeable battery technology eliminates the costs and hassles associated with frequent battery replacement
  • Designed for single-channel applications
Configurations & Architectural Specs

Configurations

LR-4200-IR Intelligent DSP IR Receiver

Architectural Specs

The IR receiver shall be capable of receiving on four (4) wide band channels (carriers), Channel 1 (2.3 MHz), Channel 2 (2.8 MHz), Channel 3 (3.3 MHz) and Channel 4 (3.8 MHz).  The receiver shall be tuned to a single channel and users shall not be able to change the channel. The receiver shall have the option of being lanyard or belt clip worn and the lanyard shall incorporate an integrated neck loop for compatibility with T-coil hearing aids. The receiver shall be intelligent and provide customized audio to either earphones or the integrated neck loop based upon which is connected. The receiver shall have two (2) 3.5 mm (TRRS) connectors to drive the integrated neck loop lanyard or up to two (2) mono or stereo earphones. The receiver shall incorporate a multi-functional display (OLED) that indicates battery status, inventory number, volume level and a customizable channel name. The receiver shall employ a unique iDSPTM noise reduction technology. The receiver shall be fully programmable via PC software.  The receiver shall have a micro USB connector used for programming/setup, inventory control, charging and firmware upgrades. The receiver shall incorporate automatic battery charging circuitry and use a non-proprietary lithium ion battery. The receiver shall automatically turn on when removed from the charging device and automatically turn off when returned to the charging device.  The receiver shall have additional charging contacts to allow for multiple charging options. The receiver shall have a signal-to-noise ratio of 60 dB or greater, THD less than 2% and shall have an audio frequency response of 63 Hz – 15 kHz (±3 dB). The Listen LR-4200-IR is specified.

CAD file(s)

Product Specifications
SpecificationLR-4200-IR

Audio

System Distortion< 2% total harmonic distortion (THD) at 80% deviation
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
System Frequency Response63 Hz - 15 kHz (±3 dB)
System Signal to Noise Ratio> 60 dB

Controls

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

Indicators

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

RF

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

IR

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
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
SensitivityBetter than one (1) nW/cm2 @40 dB SNR

Power

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

Physical

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

Environmental

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

Compliance

StandardsFCC Part 15, ICS-03, CE, RoHS, WEEE, ADA 706, CBC 11B-706
Requirements
Used With
Accessories
FAQ
QWhat is the difference between the LR-4200 and the LR-5200?
AThe main difference is that the LR-5200 is programmable with a multi-function Listen button. It gives the user an opportunity to program only the desired channels and lockout the unused channels. This makes it simple to operate for end users that need to select between multiple active channels. The Listen Button can also be used to search for an active channel and lock the receiver on a specific channel.
QWhat is the purpose of Squelch?
AThe purpose of squelch is to mute the audio output of your receiver when the signal from the transmitter is turned off or is too weak to be received. Without squelch you would hear radio noise in your earphone. The squelch function can be programmed to the desired setting.
QWhat is the warranty on the Lithium-ion battery?
AThe Lithium-ion battery has a 1 year warranty. All other accessories have a 90-day warranty. Listen Warranty
QWhat type of battery technology does the LR-4200 use?
AThe LR-4200 uses a non-proprietary field replaceable Lithium Ion battery.
QHow long does it take to fully charge the LR-4200?
AIt varies dependent on the depletion of the battery. A fully depleted battery will charge in 2.5 hours or less.
QHow many LR-4200 receivers can I use in a system?
AAs many as you need, the number is endless.
QHow long will the LR-4200 run on a fully charged battery?
AThe LR-4200 will run continuously for 8 hours on a fully charged battery
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