Name: Listen Technologies LS-31-072 iDSP Essentials Level 2 RF System
Brand: Listen Technologies
SKU: LS-31-072
Price: 1846.9 USD
Availability: InStock

Model:

LS-31-072

SKU:

LS-31-072

Availability:

In Stock

$1,846.90

Estimated price. Final price and availability are subject to confirmation. Contact our sales team for a current quote.

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Professional stationary RF system operating at 72 MHz with wide frequency response, multiple audio inputs, and advanced audio processing for assistive listening applications.

The Listen Technologies LS-31-072 iDSP Essentials Level 2 Stationary RF System delivers clear, reliable audio transmission within the 72 MHz frequency band. It features a broad frequency response from 50 Hz to 15 kHz and maintains a high signal-to-noise ratio of 62 dB (A-weighted), ensuring exceptional sound clarity with less than 2% total harmonic distortion at 80% deviation. Equipped with two distinct audio inputs, the system supports balanced connections through a female XLR or 1/4" combo connector with phantom power, as well as unbalanced inputs via dual phono connectors.

Outputs include mixed unbalanced audio on phono connectors and a headphone jack for direct monitoring. Users can customize audio with adjustable compression and contour controls that shape frequencies above 5 kHz. The unit offers three wide-band channels with precise frequency stability of ±0.005% across standard operating temperatures. Transmission range reaches up to 1,500 feet (457 meters) with an output power of 80,000 µV at 3 meters.

Powered by an in-line supply compatible with 100-240 VAC, this compact system measures 1.75 x 8.5 x 9.13 inches and weighs 2.6 pounds, making it ideal for professional assistive listening setups.

Frequency response: 50 Hz to 15 kHz (+/- 3 dB)
Signal-to-noise ratio: 62 dB (A-weighted)
Two audio inputs: balanced XLR/1/4" combo and unbalanced phono connectors
Adjustable audio compression and contour controls
Three wide-band channels with ±0.005% frequency stability
Transmission range up to 1,500 feet (457 meters)
Output power: 80,000 µV at 3 meters
Powered by in-line LA-207 power supply (100-240 VAC input)

Specifications

Antenna Type

Various antennas available BNC connectors

Audio Processing

Compression can be turned on or off, slope internally adjustable from 1:1 to 4:1, default 2:1

Box Dimensions (LxWxH)

13.4 x 9.7 x 3"

Color

Dark gray with white silk screening

Compliance

UL, CE, GS, TÜV, RoHS FCC Part 15, Part 90, Industry Canada

Contour

Cuts and boosts frequencies above 5 kHz

Controls

User Controls: Front Panel: Power, test tone on/off, channel up/down, input levels, mix level, contour, monitor volume control Rear Panel: Input 1 - Level, (line, mic, mic-phantom power) Input 2 - level (-10 / +10 dBu), RF power level (low, mid, high) Internal Adjustments: Compression ratio for audio processor Programming: SQ on/off, process on/off, channel lock

Dimensions

1.75 x 8.5 x 9.13" (4.5 x 21.5 x 23.0 cm)

Environmental

Operation temperature: 14 to 104°F (-10 to 40°C) Storage temperature: -4 to 122°F (-20 to 50°C ) Relative humidity: 0 to 95% relative humidity, non-condensing

Frequency Accuracy

+/- 0.005% stability 32 to 122ºF / 0 to 50ºC

Frequency Range

(A) 72.100 (E) 72.900 (H) 75.900

Frequency Response

50 Hz to 15 kHz (+/- 3 dB)

Indicators

Audio Input Status LEDs: Indicate Input 1, Input 2, and Mix audio levels; 10 segment LEDs; 8 green, 2 red Processing: Indicated by a green LED when on (front panel) RF Power: Indicated on the LCD (low, mid, high) LCD: Channel designation, lock status, RF power level, programming (front panel) Test Tone: Red LED illuminates when test tone is enabled

Input

Input 1: 1x Female XLR or 1/4" combo connector, balanced, 0 / -55 dBu (line/mic) nominal input level adjustable, -30 / +21 dBu (line/mic) maximum input level, impedance 20 k / 1 kOhm (line/mic), phantom power 12 VDC - on rear panel Input 2: 2x phono connectors, unbalanced, -10 / +10 dBu nominal input level adjustable, +30 dBu maximum, impedance 100 kOhms - on rear panel

Number of Channels

3x wide band

Output

Audio: Input 1 and input 2, mixed output on - rear panel), 2x phono connectors, unbalanced, -10 dBu nominal output level, +15 dBu maximum, impedance 10 Ohms Headphone: 1x 3.5 mm stereo connector, unbalanced, adjustable output level, +3 dBu maximum, impedance 10 Ohms

Output Power

80000 uV at 3 m

Package Weight

3.75 lb

Power Supply

In-line power supply, (part number LA-207)

Power Supply Connector

Barrel type: 0.02" (5.0 mm) OD 0.01" (2.5 mm) ID

Power Supply Input

100 to 240 VAC, 50 to 60 Hz, 0.4 A

Power Supply Output

12 VDC, 1.3 A, 15.6 W

Signal to Noise Ratio (SNR)

62 dB (A-Weighted)

System Distortion

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

Transmitter

Transmitter stability: 50 PPM Transmission Range: Up to 1,500' / 457 m

Weight

With power supply: 4.5 lb (2.0 kg) Unit weight: 2.60 lb (1.2 kg)

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Listen Technologies LS-31-072 iDSP Essentials Level 2 stationary RF system 72 MHz assistive listening audio inputs compression contour control transmission range

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