Listen Tech LT-800-072-01-D Stationary RF Transmitter with Dante (72 MHz)
Usually arrives in 5-9 business days.
The LT-803-072-01-D is a stationary three-channel RF transmitter designed to deliver clear, reliable assistive listening audio in houses of worship, theaters, classrooms, conference rooms, auditoriums, and other commercial and public venues. Operating in the 72 MHz RF band, the transmitter offers three selectable wideband channels: A (72.100 MHz), E (72.900 MHz), and H (75.900 MHz), allowing installers to select an appropriate frequency for their environment. The transmitter broadcasts on one selected channel at a time and supports transmission distances of up to 1,000 feet (305 meters) under line-of-sight conditions with a compatible remote antenna. Designed for flexible integration with professional audio systems, the LT-803 features balanced microphone/line and unbalanced RCA audio inputs to accommodate mixers, microphones, media players, and other audio sources.
This configuration includes the Listen Technologies LA-465 Dante 1-Channel Output XLR Adapter, enabling audio from a Dante network to be delivered to the transmitter through an analog XLR connection. The LA-465 receives digital network audio and converts it to an analog line-level signal, which the LT-803 transmits over FM radio frequencies to compatible assistive listening receivers. The adapter requires power from a PoE-enabled network switch or IEEE 802.3af-compliant PoE injector. This combination provides a convenient solution for facilities using Dante-enabled digital audio networks while maintaining compatibility with traditional 72 MHz RF assistive listening systems.
Engineered for straightforward installation and operation, the LT-803 features Listen Technologies' Look & Listen LCD display, providing immediate information about the selected channel, channel lock status, and RF power level. Adjustable quarter, half, and full RF output power settings allow the transmission level to be configured for different installation requirements. Two audio inputs with adjustable levels support source mixing, while built-in audio processing includes automatic gain control, adjustable compression, limiting, and contour equalization for improved audio management. A front-panel headphone output enables convenient monitoring, while input level indicators, a test tone, and channel lock functionality simplify setup and daily operation. The compact half-rack design supports optional rack mounting using the separately available LA-326 Universal Rack Mounting Kit.
Installation Note: A compatible 72 MHz antenna and RF assistive listening receivers are required for a complete system and are sold separately. The included LA-465 Dante adapter requires a compatible PoE network connection. The LT-803 transmits one selected RF channel at a time and does not broadcast three separate audio programs simultaneously. Actual transmission range depends on antenna selection, placement, environmental conditions, and system configuration.
| Frequency Response | 50 Hz - 15 kHz (±3 dB) |
|---|---|
| Signal-to-Noise Ratio | 62 dB (A-Weighted) |
| Distortion | Less Than 2% Total Harmonic Distortion (THD) at 80% Deviation |
| Audio Processing | Switchable Compression, Automatic Gain Control, and Limiting Adjustable Compression Ratio: 1:1 to 4:1 (Default 2:1) |
| Contour | Cuts and Boosts Frequencies Above 5 kHz |
| RF Frequency Range | Channel A: 72.100 MHz Channel E: 72.900 MHz Channel H: 75.900 MHz |
| Number of Channels | 3 Selectable Wideband Channels (One Active at a Time) |
| Frequency Accuracy | ±0.005% Stability from 0°C to 50°C (32°F to 122°F) |
| Transmitter Stability | 50 PPM |
| Transmission Range | Up to 1,000 ft (305 m) Line of Sight with Compatible Remote Antenna |
| Antenna Type | Compatible 72 MHz Top-Mounted or Remote Antennas (Sold Separately) |
| Antenna Connector | BNC, 50 Ohms RG-58 Cable for Runs Under 100 ft RG-8 Cable for Runs Over 100 ft |
| RF Output Power | 80,000 µV at 3 m Selectable Quarter, Half, and Full Power Settings |
| Dante Connectivity | Included LA-465 Dante 1-Channel Output XLR Adapter |
| Dante Adapter Power | PoE Switch or IEEE 802.3af-Compliant PoE Injector Required |
| Audio Input 1 | Rear-Panel Balanced XLR/1/4" Combo Connector Selectable Line/Mic Input Nominal Input Level: 0/-55 dBu (Line/Mic), Adjustable Maximum Input Level: -30/+21 dBu (Line/Mic) Input Impedance: 20 kOhms/1 kOhm (Line/Mic) Phantom Power: +12V DC |
| Audio Input 2 | Rear-Panel Dual Unbalanced RCA Connectors Nominal Input Level: -10/+10 dBu, Adjustable Maximum Input Level: +30 dBu Input Impedance: 100 kOhms |
| Audio Output | Rear-Panel Dual Unbalanced RCA Mixed Output (Inputs 1 and 2) Nominal Output Level: -10 dBu Maximum Output Level: +15 dBu Output Impedance: 10 Ohms |
| Headphone Output | Front-Panel 3.5 mm Stereo Connector, Unbalanced Adjustable Output Level Maximum Output Level: +3 dBu Output Impedance: 10 Ohms |
| User Controls | Front Panel: Power, Test Tone, Channel Selection, Input Levels, Mix Level, Contour, Monitor Volume Rear Panel: Input 1 Level (Line/Mic/Mic Phantom Power), Input 2 Level (-10/+10 dBu), RF Power Level |
| Internal Adjustments | Audio Processor Compression Ratio |
| Programming | Audio Processing On/Off, Channel Lock |
| LCD Display | Channel Designation, Channel Lock Status, RF Power Level |
| Audio Input Status LEDs | 10-Segment Indicators (8 Green, 2 Red) for Input 1, Input 2, and Mixed Audio Levels |
| Processing Indicator | Green LED Indicates Audio Processing Is Enabled |
| Test Tone Indicator | Red LED Indicates Tes t Tone Is Enabled |
| RF Power Indicator | LCD Display Shows Low, Mid, or High RF Power |
| Power Supply | Listen Technologies LA-207 In-Line Power Supply |
| Power Supply Input | 100 - 240V AC, 50 - 60 Hz, 0.4A |
| Power Supply Output | 12V DC, 1.3A, 15.6W |
| Power Supply Connector | 5.0 mm (0.20") Outer Diameter x 2.5 mm (0.10") Inner Diameter, Barrel-Type Connector |
| Operating Temperature | -10°C to +40°C (14°F to 104°F) |
| Storage Temperature | -20°C to +50°C (-4°F to 122°F) |
| Relative Humidity | 0 - 95%, Non-Condensing |
| Compliance | UL, CE, GS, TÜV, RoHS |
| Color | Dark Gray with White Silk Screening |
| Rack Mounting | 1U Height, Half-Rack Width One or Two Transmitters Can Be Mounted in One Rack Space Using Optional LA-326 Rack-Mounting Kit |
| Dimensions (H x W x D) | 1.75" (44.45 mm) x 8.50" (215.9 mm) x 9.13" (231.9 mm) |
| Weight | 4.5 lbs (2.0 kg) with Power Supply |