Listen Tech LR-4200-072 Intelligent DSP RF Receiver, 72 MHz

The Listen Technologies LR-4200-072 Intelligent DSP RF Receiver is a high-performance assistive listening device designed for clear and reliable audio in various venues. As part of Listen Technologies' iDSP line, it boasts the best-in-class sensitivity and superior noise reduction compared to other devices. The compact and lightweight design with an integrated neck loop/lanyard ensures comfortable wearability for extended use. The DSP loop driver offers an improved listening experience for users with T-coil equipped hearing aids. Additionally, dual 3.5mm jacks allow sharing the receiver between users.

The LR-4200-072 features a micro-USB connection for easy charging, setup, programming, and firmware updates using the free iDSP software. It incorporates advanced Lithium-ion rechargeable batteries for long-lasting and reliable power, ideal for lengthy seminars, presentations, and conferences. The integrated OLED display provides clear information on channel, battery status, and volume level.

Whether in classrooms, boardrooms, conferences, or other venues, the LR-4200-072 is a versatile assistive listening solution offering convenience, reliability, and crystal-clear audio for users.

Bullet Key Features

• Industry-leading sensitivity and 20 dB less noise for exceptional audio clarity
• Integrated neck loop/lanyard with DSP loop driver for enhanced T-coil listening
• Compact and lightweight design for user comfort and easy storage
• Informative OLED display showing channels, battery status, and volume
• Lanyard and belt clip options for convenient and discreet use
• Advanced rechargeable battery eliminates frequent battery replacements
• Suitable for single-channel applications

Product Specifications

• Audio
• System Distortion: < 2% THD at 80% deviation
• Outputs: 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
• 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)
• Unit Weight: 1.60 oz. (45 g)
• Dimensions with Belt Clip: 3.75 x 2.00 x 0.80 in. (9.6 x 5.0 x 2.1 cm)