Listen Technologies LR-4200-IR Intelligent DSP IR Receiver
Listen Technologies LR-4200-IR Intelligent DSP IR Receiver
SoundPro Item: 72598 | Part Number: LR-4200-IR
Usually ships in 5-7 business days
- Best-In-Class Infrared Sensitivity Maintains Signal Lock At One Nanowatt Per Square Centimeter
- DSP Loop Driver Integrated Into Neck Loop Lanyard Eliminates External Accessories For T-Coil Users
- Dual 3.5mm Jacks Allow Two Patrons To Share One Receiver During High-Demand Events
- Fully Rechargeable In 2.5 Hours Via Micro USB For Simplified Fleet Charging
- OLED Display Provides Real-Time Feedback On Channel Selection And Battery Status
- Software Programmable Controls Enable Batch Configuration Of Auto Power Off And Squelch Threshold
- Field Replaceable Lithium-Ion Battery Extends Product Lifecycle Without Factory Service
The LR-4200-IR addresses the needs of venues requiring ADA-compliant assistive listening with a four-channel infrared receiver engineered for corporate boardrooms, conference centers, and houses of worship. Its advanced DSP circuitry ensures intelligible audio reproduction across extended sessions where clarity is non-negotiable, while the integrated neck loop driver eliminates the need for separate accessories when serving patrons with T-coil-equipped hearing aids.
Built for high-utilization environments where equipment must perform reliably without constant intervention, this receiver incorporates lithium-ion battery technology that provides eight hours of operation and recharges fully in 2.5 hours via standard micro USB. Dual 3.5mm output jacks enable two listeners to share a single unit when demand exceeds inventory, and the OLED display provides at-a-glance confirmation of channel selection, battery status, and volume level without requiring staff assistance.
Its compact form factor and sub-three-ounce weight reduce user fatigue during lengthy events, while field-replaceable batteries and software-programmable settings via USB streamline fleet management for integrators and facility operators managing dozens or hundreds of units across multiple spaces.
- Audio
- System Distortion: < 2% total harmonic distortion (THD) at 80% deviation
- Audio Output Jacks: Two (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 Response: 63 Hz - 15 kHz (±3 dB)
- System Signal to Noise Ratio: > 60 dB
- Controls
- User Controls: Power on/off and volume up/down
- Programming: Via software and USB port, Auto Seek, Jack Sense, Squelch, Auto Power, Auto Off, Stereo, Brightness, Channel Name
- Set-up Controls: Press and hold up/down volume buttons for 5 seconds to enterchannel adjust, use up/down to select channel
- Indicators
- Display: OLED - Channel designation, battery level, unit number, charging status, volume status
- LED: Flashes when batteries are low or to indicate charging, solid when fully charged
- RF
- Carrier Frequencies: 2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz
- Number of Channels: Four (4) selectable channels
- Frequency Accuracy: ± .005% stability 32 to 122 ºF (0 to 50 ºC)
- Modulation FM: Wideband, ±50 kHz deviation max, 50 uS de-emphasis
- IR
- Coverage Area: 30,000 ft² (2787 m²) single channel with LT-84/LA-141 or 40,000 ft² (3716 m²) single channel with LT-82/LA-140
- Squelch: Programmable in 20 steps, automatic on loss of IR signal
- Power Save Mode: Turns unit off after a specified time of no IR signal, default is 30 minutes
- Sensitivity: Better than one (1) nW/cm2 @40 dB SNR
- Power
- Power Supply: Micro USB connector, 5 V, 500 mA
- Battery Type: Lithium Ion
- Battery Life: 8 Hours of typical use
- Battery Charging Time: Fully charged in 2.5 Hours
- Physical
- Color: Flat Black
- Unit Weight with Batteries: 2.8 oz. (79.4 g)
- Shipping Weight: 3.5 oz. (99.2 g) with a 1 lbs. (0.45 kg) minimum
- Dimensions (HxWxD): 3.75x2x0.64” (9.6x5x1.7cm)
- Unit Weight: 1.9 oz. (53.9 g)
- Dimensions with Belt Clip: 3.75x2x0.8” (9.6x5x2.1cm)
- 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 StandardsFCC Part 15, ICS-03, CE, RoHS, WEEE, ADA 706, CBC 11B-706
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