Description
The Listen Technologies LR-4200-IRb Intelligent DSP IR Receiver delivers exceptional audio clarity and superior infrared reception, designed for venues that demand reliable assistive listening performance. As part of Listen Technologiesā iDSP (Intelligent Digital Signal Processing) series, it features the smallest and lightest form factor in its class, ensuring comfortable and effortless use.
This receiver integrates a neck loop/lanyard with a DSP loop driver for users with T-coil hearing aids, providing an enhanced listening experience. Dual 3.5mm audio outputs allow sharing between listeners, while the OLED display provides at-a-glance details such as channel, battery, and volume status.
Built with a rechargeable lithium-ion battery and micro USB connectivity, the LR-4200-IRb offers simple charging and programming through standard USB ports. Ideal for conferences, corporate environments, and educational venues, it combines performance, efficiency, and accessibility in one compact device.
| Category | Specification |
|---|---|
| Model | LR-4200-IRb Intelligent DSP IR Receiver |
| Audio System Distortion | < 2% THD at 80% deviation |
| Audio Output Jacks | Two (2) 3.5 mm connectors, unbalanced, 0 dBu nominal, 16 mW max, 32 Ī© impedance |
| System Frequency Response | 63 Hz ā 15 kHz (Ā±3 dB) |
| Signal-to-Noise Ratio | > 60 dB |
| User Controls | Power on/off, volume up/down |
| Programming | Via software and USB port (Auto Seek, Jack Sense, Squelch, Auto Power, Auto Off, Stereo, Brightness, Channel Name) |
| Display | OLED (channel, battery level, charging status, volume) |
| LED Indicators | Flashing: low battery/charging; Solid: fully charged |
| Carrier Frequencies | 2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz |
| Number of Channels | Four (4) selectable channels |
| Modulation | FM Wideband, Ā±50 kHz deviation, 50 Āµs de-emphasis |
| Coverage Area | Up to 30,000 ftĀ² with LT-84/LA-141 or 40,000 ftĀ² with LT-82/LA-140 |
| Sensitivity | Better than 1 nW/cmĀ² @ 40 dB SNR |
| Power Supply | Micro USB connector, 5 V, 500 mA |
| Battery Type | Lithium-ion (rechargeable, field replaceable) |
| Battery Life | Up to 8 hours typical use |
| Charging Time | Fully charged in 2.5 hours |
| Color | Flat black |
| Dimensions (H Ć W Ć D) | 3.75 Ć 2.0 Ć 0.64 in. (9.6 Ć 5.0 Ć 1.7 cm) |
| Dimensions with Belt Clip | 3.75 Ć 2.0 Ć 0.80 in. (9.6 Ć 5.0 Ć 2.1 cm) |
| Weight (with Battery) | 2.8 oz (79.4 g) |
| Operating Temperature | 14 to 104 Ā°F (ā10 to 40 Ā°C) |
| Storage Temperature | ā4 to 122 Ā°F (ā20 to 50 Ā°C) |
| Relative Humidity | 0ā95%, non-condensing |
| Compliance | FCC Part 15, ICS-03, CE, RoHS, WEEE |
| Warranty | Limited lifetime warranty |
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