LR-500 Specifications

LR-500 Specifications

Architectural Specifications

The FM receiver shall be capable of receiving on 57 wide and narrow band channels with a SNR of 80dB or greater. The receiver shall be programmable to electronically lock out unneeded channels. The receiver shall be capable of seek- ing channels. The device shall have an adjustable squelch. The device shall have an audio frequency response of 63Hz to 15KHz, ±3dB at 72MHz, or of 63Hz to 10kHz, ± 3dB at 216MHz. The device will incorporate a stereo headset jack that allows the user to plug in either a mono or stereo headset. The device shall incorporate an LCD display that indi- cates channel, channel lock or lock status, battery level, low battery, battery charging, and RF signal strength. The receiver shall incorporate automatic battery charging circuitry for recharging of NiMH batteries. The Listen LR-500 is specified.

Specifications

 

Specification

LR-500-072

LR-500-216

 

RF Frequency Range

72.025 - 75.950 MHz

216.025 - 216.975 MHz

 

Number of Channels

57 (17 wide, 40 narrow)

57 (19 wide, 38 narrow)

 

Sensitivity

.6uV typical, 1 uV maximum for 12dB SINAD

RF

Frequency Accuracy

± .005% stability 0° to 50°C (32° to 122° F)

Antenna

Uses earphone cable

 

 

Antenna Connector

3.5mm connector

 

Squelch

Programmable in 20 steps

 

Compliance

FCC Part 15, Industry Canada

 

 

** All system specifications are wireless end-to-end

 

 

 

 

 

System Frequency Response

63Hz - 15kHz (±3dB)

63Hz - 10kHz (±3dB)

Audio

System Signal to Noise Ratio

SQ enabled: 80dB; SQ disabled 60dB

SQ enabled: 80dB; SQ disabled 50dB

(A-weighted)

 

 

 

System Distortion

<2% total harmonic distortion (THD) at 80% deviation

 

 

 

 

Output

3.5mm connectors, unbalanced, 0dBu nominal output level,

 

16mW maximum, impedance 32 Ohms

 

 

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Listen Technologies LR-300, LR-400 user manual LR-500 Specifications, Architectural Specifications

LR-500, LR-300, LR-400 specifications

Listen Technologies has established itself as a leader in providing innovative audio solutions that enhance communication in various environments. Among their standout products are the LR-400, LR-300, and LR-500, which are designed for assistive listening, language interpretation, and audio distribution. Each of these portable receivers offers unique features, ensuring that users have a seamless experience during presentations, events, and meetings.

The LR-400 is a versatile listening receiver that operates on a wide frequency range. It is specifically engineered for maximum clarity and disturbance-free reception. One of its primary features is the ability to connect directly to a variety of audio sources, making it compatible with numerous sound systems. This device boasts a prominent LCD display, which provides real-time information about channel selection and battery life, enhancing user accessibility. Additionally, the LR-400 supports both mono and stereo audio configurations, catering to different listening preferences and needs.

The LR-300, on the other hand, is specifically built for personal listening purposes, often utilized in classrooms, theaters, and guided tours. It is lightweight and compact, designed for ease of use and portability. One of the LR-300’s standout features is its long battery life, allowing for extended use without the need for frequent recharging. Users can easily adjust the volume for optimal sound levels, ensuring they can fully engage with the presented audio without compromising comfort. The LR-300 can also be equipped with various headphones and earphones, providing flexibility to suit individual preferences.

Finally, the LR-500 expands on the capabilities of its predecessors with advanced technology aimed at improving audiology experiences. It offers a digital communication protocol that significantly enhances audio quality while minimizing interference. The LR-500 is particularly suitable for professional settings, such as conferences and multinational events, where language interpretation is required. With multiple channel options, it allows participants to select their preferred language effortlessly. Its robust design ensures durability, making it suitable for frequent travel and usage in diverse environments.

In conclusion, the LR-400, LR-300, and LR-500 receivers from Listen Technologies exemplify the company's commitment to delivering high-quality audio solutions. Each device is equipped with advanced features and technologies that address specific user needs, whether for personal listening, language interpretation, or professional audio distribution. With their reliability and performance, these receivers enhance communication and accessibility in various settings, ensuring that every voice is heard loud and clear.