The Behringer Ultralink ULM300USB is a high-performance 2.4 GHz digital wireless system designed for audio applications, featuring a handheld microphone (ULM300M) and a dual-mode USB receiver (ULM300D). This system is engineered to provide reliable wireless audio transmission with ease of use and flexibility across various setups.
Function Description:
The ULM300USB system facilitates wireless audio transmission from the handheld microphone to a compatible USB receiver. The microphone captures audio, which is then digitally transmitted to the USB receiver. The receiver can be plugged into wireless-enabled Behringer mixers, powered speakers, other compatible products, or a computer's USB port, allowing for seamless integration into existing audio setups. This makes it suitable for live performances, presentations, recording, and other scenarios where a wireless microphone is beneficial. The system operates in the 2.4 GHz ISM band, which is a globally available frequency range, ensuring broad compatibility.
Important Technical Specifications:
- RF Output: < 10 dBm (10 mW), indicating a low-power transmission suitable for various environments.
- Operating Range: Up to 60 m (200 ft)*, providing ample freedom of movement. The actual range may vary depending on RF interference and line of sight.
- Dynamic Range: 93 dB, A-weighted**, ensuring a wide range between the quietest and loudest sounds can be captured without distortion.
- Equivalent Input Noise: -120 dBu, signifying a very low noise floor for clean audio.
- Frequency Response (Wireless Link): 10 Hz – 20 kHz, ±1 dB**, covering the full audible spectrum with minimal deviation.
- Sampling Rate: 48 kHz, a professional standard for digital audio.
- Resolution: 24-bit, offering high fidelity and detail in audio capture.
- Encoding: 4-bit ADPCM (192 kbps), an efficient compression method for wireless transmission.
- Latency: 14.3 ms, a very low delay, making it suitable for live applications where synchronization is crucial.
- RF Frequency: 2.4 GHz ISM band (2.404~2.468 GHz, 17 channels), providing multiple options to avoid interference.
- USB Current Consumption: 70 mA @ 5 VDC, indicating low power draw from the USB host.
- Battery Type: 2 x AA (LR6) Alkaline cells for the microphone.
- Battery Life: > 24 hrs, offering extended usage time on a single set of batteries.
- Dimensions (W x D x H):
- Microphone: 53 x 53 x 260 mm (2.1 x 2.1 x 10.2")
- Wireless receiver: 76 x 22 x 8.5 mm (3.0 x 0.9 x 0.3")
- Weight:
- Microphone: 0.3 kg (0.7 lbs)
- Wireless receiver: 0.01 kg (0.02 lbs)
Usage Features:
The ULM300USB system is designed for intuitive operation, with clear controls and LED indicators:
- USB Connector (1): Located on the ULM300D receiver, this is used to plug the receiver into a compatible USB port.
- POWER/STATUS LED (2): Present on both the microphone and receiver, this LED provides visual feedback on the device's status.
- VOLUME UP Button (3): On the ULM300M microphone, this button serves multiple functions:
- Long press ("—"): Powers on the microphone and commences transmission.
- Short press ("-"): Increases the volume.
- Short press ("-") when muted: Unmutes the microphone.
- VOLUME DOWN Button (4): On the ULM300M microphone, this button also has multiple functions:
- Short press ("-"): Decreases the volume.
- Long press ("—"): Mutes the microphone.
- Further long press ("—") when muted: Powers off the microphone.
LED Status Key for Microphone and USB Receiver:
The LED behavior provides crucial information about the system's operational status:
- No Signal: Amber LED flashes on/off slowly.
- Connected, Active: Green LED is solid.
- Connected, Muted: Green LED flashes on/off quickly.
- Connected, Active, Low Battery: Green/Red LEDs alternate colors.
- Connected, Muted, Low Battery: Green/Red LEDs alternate colors and flash on/off.
Getting Started:
- Receiver Connection: Plug the ULM300D USB wireless receiver into a designated USB socket on a wireless-enabled Behringer mixer, powered speaker, other compatible product, or a computer's USB port. The POWER/STATUS LED on the receiver will slowly flash amber, indicating it's waiting for a connection.
- Microphone Power On: Press and hold the VOLUME UP button on the ULM300M wireless microphone to switch it on. This will initiate transmission. Once connected, both the LEDs on the microphone and receiver will light solid green, confirming a successful link.
- Volume Adjustment: Upon power-on, the microphone will be at its previously set operating volume. Use the VOLUME UP and VOLUME DOWN buttons for fine-tuning the volume level.
- Mute Function: A long press of the VOLUME DOWN button will mute the microphone. The mute status is indicated by the LED flashing green rapidly. If the microphone remains muted for 10 minutes without being unmuted, it will automatically power down to conserve battery life.
- Microphone Power Off: A further long press of the VOLUME DOWN button while the microphone is in mute will switch off the wireless microphone completely.
- Unmute Function: A short press of the VOLUME UP button will unmute the wireless microphone, returning it to its previous volume level.
Maintenance Features:
While the manual does not detail specific maintenance features, the design implies standard care for electronic devices:
- Battery Replacement: The microphone uses 2 x AA (LR6) Alkaline cells, which are user-replaceable. The >24 hours battery life minimizes frequent replacements. The low battery LED indicator helps users know when to replace batteries, preventing unexpected power loss during use.
- Cleaning: As with most electronic equipment, keeping the microphone and receiver clean and free from dust and debris will ensure optimal performance and longevity.
- Firmware Updates: Although not explicitly mentioned, Behringer products often support firmware updates for performance improvements or bug fixes, which would typically be managed via a computer connection.
- Durability: The physical dimensions and weight suggest a robust design for the microphone, suitable for regular handling in various environments. The compact size of the receiver also contributes to its portability and ease of integration.
The Behringer Ultralink ULM300USB system offers a user-friendly and technically sound solution for wireless audio, combining reliable performance with practical features for a wide range of users.
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