Listen Technologies LR-4200-072 Intelligent DSP RF Receiver

The LR-4200-072 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-4200-072 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 equipped with a micro USB connection which can be used with free iDSP software for charging, set up, programming, inventory management and firmware updates.

Extended speaking sessions, presentations and more can be challenging for other devices, but the LR-4200-072 incorporates advanced Lithium-ion 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 classrooms to boardrooms, conferences and more, the LR-4200-072 is an outstanding receiver choice for any venue looking to offer convenient, reliable assistive listening.

Listen Technologies LR-4200-072 Features

• High-performance RF receiver offering best-in-class sensitivity and 20dB 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
• 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

• LR-4200-072 Intelligent DSP RF Receiver1

• Audio
  • System Distortion: < 2% total harmonic distortion (THD) at 80% deviation
  • Output(s): Two (2) 3.5 mm (0.14 in.) connectors, unbalanced, 0 dBu nominal output level, 16 mW maximum, impedance 32 ohm
  • System Frequency Response: 50 Hz - 15 kHz (±3 dB)
  • System Signal to Noise Ratio: SQ enabled 80 dB, SQ disabled 60 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
  • Display: Channel designation, battery level, unit number, charging status
• RF
  • Frequency Range: 72.0250 - 75.9500 MHz
  • Number of Channels: 17 wide band, 40 narrow band
  • Sensitivity: .6uV typical, 1 uV maximum for 12 dB sinad
  • Frequency Accuracy: ± .005% stability 32 to 122 ºF (0 to 50 ºC)
  • Squelch: Programmable in 20 steps, automatic on loss of RF signal
  • Antenna Type: Uses ear phone/neck loop lanyard and short ear phone cable or standard earphone cable
• Power
  • Power Supply: Micro USB connector, 5 V, 500 mA
  • Battery Type: Lithium Ion 3.7 Vdc, 1200 mAh
  • Battery Life: 8 Hours of continuous use
  • Battery Charging Time: Fully charged in 2.5 Hours
• Physical
  • Color: Black
  • Unit Weight with Batteries: 2.4 oz. (68 g)
  • Shipping Weight: 3.2 oz. (91 g) with 1 lbs (454 g) minimum; unit weight: 1.6 oz. (45 g)
  • Dimensions (HxWxD): 3.75x2x0.64" (9.6x5x1.7cm); 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
• ComplianceStandards: FCC Part 15, Part 90, Industry Canada, RoHS