Telex ST 300 Transmitter

Designed for professional studios, stages, and broadcast environments, the Telex ST 300 Transmitter delivers dependable, high-quality audio transmission in a compact base unit. With 17 user-selectable frequencies digitally controlled from the front panel, it enables fast, precise channel changes and reliable operation even in multi-channel or high-interference settings. The built-in headphone monitoring jack, with adjustable level, lets technicians and performers listen to the input signal in real time, ensuring optimum audio quality before going live. A bright backlit LCD display clearly presents essential operating data—Channel, Frequency and Audio Input Level—so operators can verify settings at a glance in any lighting condition. Built to endure the rigors of professional use, the ST 300 integrates smoothly with existing audio workflows, delivering clear, consistent performance for broadcast, theater, live events, and studio productions.

• 17 frequencies, digitally controlled from front panel: The ST 300 offers a broad, predefined set of 17 selectable frequencies accessible directly from the front panel buttons. This design enables rapid channel changes on the fly, making it ideal for multi-room venues, touring productions, or environments where quick channel hopping is essential. Digital control ensures precise, repeatable frequency selection with minimal drift, reducing the risk of cross-talk and interference during demanding performances. The intuitive front-panel layout keeps operators in control, even under pressure, so you can lock in the right channel quickly and confidently. Whether you’re coordinating with multiple transmitters across a venue or switching between presets for different acts, this capability supports smooth, uninterrupted audio delivery.
• Intuitive front-panel controls for fast setup: The ST 300’s control surface is designed for professional use, featuring dedicated buttons and responsive feedback that simplify setup and operation. With clear tactile response, operators can navigate menus, select frequencies, and adjust basic audio parameters without fumbling through complicated menus. The front-panel controls are complemented by a robust, backlit LCD that confirms current channel assignments, frequency, and input level as you configure the system. This combination of hardware and display makes it straightforward to train new staff, reduce setup time between performances, and maintain consistent audio performance across shows and locations.
• Headphone jack with adjustable monitoring level: The built-in headphone monitor provides real-time feedback of the transmitted audio path, helping engineers verify signal integrity, dynamics, and presence before the signal leaves the transmitter. The adjustable level control accommodates different listening environments and operator preferences, ensuring you can hear the exact audio characteristics being transmitted. This feature is particularly valuable during live events, where quick, accurate monitoring can prevent issues such as clipping, excessive noise, or channel bleed. The headphone monitoring capability makes the ST 300 a practical choice for both studio and field work, enabling precise listening without requiring external monitoring equipment.
• Backlit LCD displaying Channel, Frequency and Audio Input Level: Readability in dim venues is critical, and the ST 300’s backlit LCD provides bright, high-contrast feedback of essential operation data. Operators can instantly confirm which channel is active, the exact frequency in use, and the current audio input level, reducing the chance of misconfiguration during setup or performance. The LCD’s informative readouts support quick diagnostics, allowing technicians to spot anomalies such as unexpected level changes or drift at a glance. In busy production environments, this at-a-glance information helps maintain smooth transitions between scenes, songs, or acts with minimal downtime.
• Professional-grade design for reliability: The ST 300 is built to withstand the demands of professional environments, including broadcast studios, theaters, and live venues. Its robust construction and rely-on performance ensure stable operation across varied venues and conditions. The transmitter integrates cleanly with standard audio workflows and supports dependable, consistent audio transmission across different room configurations. While compact, the ST 300 is designed to deliver the quiet, clean signal quality required for high-stakes productions, helping you maintain audience focus on the content rather than technical issues.

Technical Details of Telex ST 300 Transmitter

• Frequency options: 17 user-selectable frequencies digitally controlled from the front panel
• Monitoring: Headphone jack with adjustable level for input signal monitoring
• Display: Backlit LCD shows Channel, Frequency and Audio Input Level
• Control: Front panel control buttons provide direct, rapid access to channel and frequency selection
• Form factor: Base transmitter designed for professional audio environments and live production workflows

How to Install Telex ST 300 Transmitter

Installing the Telex ST 300 Transmitter is a straightforward process designed to get you from power-up to pristine transmission with minimal downtime. Begin by selecting a stable, well-ventilated location for the unit, whether on a desk, in a rack, or another serviceable surface. Ensure there is adequate air movement around the transmitter to prevent heat buildup during extended operation. Connect the device to a suitable power source that matches the unit’s power requirements, and verify that the power supply is clean and stable to minimize noise and ripple in the signal chain.

Next, establish your audio path. Connect your audio source to the transmitter’s input using suitable cables (balanced or unbalanced as recommended by the manufacturer). Confirm any required level settings on the source so that the input reaches an optimal range without clipping. Once the input is secured, power on the ST 300 and use the front-panel controls to select one of the 17 available frequencies. The front-panel buttons allow you to cycle through options quickly, with the LCD providing real-time feedback on the current Channel and Frequency. If your installation includes multiple devices, coordinate channels to prevent interference and ensure a clean, consistent signal path throughout the venue.

With the frequency selected, monitor the incoming signal using the built-in headphone jack. Adjust the monitoring level to a comfortable setting that accurately reflects the audio you are transmitting. This step is crucial to verify that levels are appropriate and that the signal remains clean as it travels through the transmission chain. Perform a basic test by playing a short audio segment and checking the receiver or monitoring system for clarity and fidelity. If you anticipate routine changes or live switching, consider rehearsing a few presets or saving channel configurations to expedite transitions during the event.

Finally, verify the LCD readout to confirm that Channel, Frequency and Audio Input Level align with your intended setup. If your workflow requires frequent changes, you may implement a routine that checks these parameters at the start of each session. For added control, keep the unit in a safe state when not in use to prevent accidental frequency changes during downtime. Regular maintenance checks — including visual inspection of connectors and ensuring clean power — will help preserve long-term performance and reduce the risk of issues during critical moments in a production.

Frequently Asked Questions

• What frequencies does the Telex ST 300 Transmitter support? The transmitter provides 17 user-selectable frequencies, digitally controlled from the front panel for quick and precise channel changes in live or studio environments.
• Can I monitor the audio input on the ST 300? Yes. The built-in headphone jack with adjustable level lets you listen to the input signal in real time to verify audio quality before transmission.
• How is information displayed on the unit? The ST 300 features a backlit LCD display that shows the active Channel, the Frequency in use, and the Audio Input Level, enabling fast verification in low-light settings.
• Is the ST 300 suitable for professional productions? Absolutely. Its 17-frequency capability, front-panel control, robust build, and monitoring features are tailored for broadcast, theatre, live events, and studio workflows where reliability and ease of use are paramount.
• What is the best way to install and configure the transmitter? Place the unit on a stable surface or in a rack, connect power and your audio input, power up, select a frequency via the front panel, and use the LCD readout to confirm Channel and Frequency. Use the headphone monitor to verify audio quality and adjust levels as needed, then perform a quick live test to ensure clean transmission with no interference.