Listen Technologies iDSP RF Receiver (72 M㎐) for single-channel applications

Dual 3.5mm output jacks - OLED display - incorporates advanced Lithium-ion rechargeable batteries

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What's in the box:

  • Listen Technologies iDSP RF Receiver (72 M㎐)
  • Non-proprietary field replaceable Lithium-ion battery
  • 5-year Limited Warranty

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Best range and reception in its class

Listen Technologies iDSP RF Receiver (72 M㎐) for single-channel applications is the smallest device of its kind, resulting in easier wearability and usability. Part of Listen's Intelligent Digital Signal Processing (iDSP) line, this LR-4200-072 receiver has an integrated neck loop/lanyard, and the DSP loop driver offers an improved listening experience for anyone with a T-coil-equipped hearing aid. Dual 3.5㎜ output jacks also allow receivers to be shared between users. This outstanding receiver offers convenient, reliable assistive listening performance for any venue looking to provide a fantastic experience for all participants.


  • Best-in-class sensitivity and 20㏈ less noise than other devices
  • 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
  • Advanced rechargeable battery technology eliminates the costs and hassles associated with frequent battery replacement

Specifications for the Listen Technologies iDSP RF Receiver (72 M㎐)

{ "Audio": { "System Distortion": "< 1% total harmonic distortion (THD) at 80% deviation", "Output/s": "Two (2) 3.5 ㎜ (0.14 in.) connectors, unbalanced, 0 dBu nominal output level, 50 mW maximum, impedance 32 ohm", "System Frequency Response": "50 Hz - 15 kHz (±3 dB)", "System Signal to Noise Ratio": "SQ disabled 70 dB, SQ enabled 80 dB" }, "Controls": { "User Controls": "Power, up/down volume", "Programming": "Via software and USB port", "Set-up Controls": "Press and hold up/down volume buttons for 5 seconds to enter channel adjust, use up/down to select channel" }, "Indicators": { "LEDs": "Flashes when batteries are low or to indicate charging, solid when fully charged" }, "RF": { "Frequency Range": "72.0250 - 75.9500 MHz", "Number of Channels": "Basic Mode: 3 wide Band, Expand Mode: 17 wide band", "Sensitivity": ".6uV typical, 1 uV maximum for 12 dB sinad", "Frequency Accuracy": "± .005% stability 32 to 122 ºF (0 to 50 ºC)", "Squelch": "Fixed level, automatic on loss of RF signal", "Antenna Type": "Uses ear phone/neck loop lanyard and short ear phone cable or standard earphone cable" }, "Power": { "Battery Type": "Lithium Ion 3.7 Vdc, 1200 mAh", "Battery Life": "24 Hours of continuous use", "Battery Charging Time": "Fully charged in 2.5 Hours", "Power Supply": "Micro USB connector, 5 V, 500 mA" }, "Physical": { "Color": "Black", "Unit Weight": "1.60 oz. (45 g)", "Unit Weight with Batteries": "2.40 oz. (68 g)", "Shipping Weight": "3.20 oz. (91 g) with 1.0 lbs. (454 g) minimum", "Dimensions (H x W x D)": "3.75 x 2.00 x 0.64 in. (9.6 x 5 x 1.7 cm)", "Dimensions with Belt Clip": "3.75 x 2.00 x 0.80 in. (9.6 x 5.0 x 2.1 cm)" }, "Environmental": { "Temperature - Operation": "14 to 104 ºF (-10 to 40 ºC)", "Temperature - Storage": "(-)4 to 122 °F (-20 to 50 °C)", "Relative Humidity": "0 to 95% relative humidity, non-condensing" }, "Compliance": { "Standards": "FCC Part 15 Class B, Industry Canada ICES-3 (B), RoHS" } }

Research Materials for Listen Technologies iDSP RF Receiver (72 M㎐)

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iDSP RF Receiver (72 M㎐) Specifications

iDSP RF Receiver (72 M㎐) User Guide

iDSP RF Receiver (72 M㎐) Quick Start Guide

iDSP RF Receiver (72 M㎐) Technical Note

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