River Acoustics Astra One ไมค์ลอยคู่ UHF เสาอากาศ 4 ต้น หน้าจอ LCD

River Acoustics ASTRA ONE: Dual-Channel UHF Wireless Microphone System with Four Antennas, Independent LCD Displays, and Headphone Monitoring

The River Acoustics ASTRA ONE is a dual-channel UHF wireless handheld microphone system designed for live performances, events, conference rooms, presentations, and karaoke applications. Featuring two handheld microphones and a dual-channel receiver, the system operates within the specified UHF frequency ranges of 694.5–702.7 MHz and 748.3–757.7 MHz. The receiver incorporates four antennas, with two antennas assigned to each channel in an A/B reception arrangement, providing a flexible wireless microphone solution for a variety of professional audio environments.

One of the key features of the ASTRA ONE is its independent LCD display for each receiver channel. Both screens provide essential operating information, including channel selection, frequency, and lock status. Dedicated A/B RF signal meters allow users to monitor the received signal strength from each antenna path, while 8-level audio meters help indicate the signal level for each microphone. These visual monitoring tools make it easier to inspect system operation and prepare microphone levels before an event.

The receiver provides convenient independent volume adjustment for both wireless channels. The VOX1 and VOX2 buttons allow users to select the desired microphone channel, while the main Volume control adjusts the selected channel’s audio level. This design helps operators balance the sound of two presenters or performers without requiring complicated adjustments.

For direct audio monitoring, the River Acoustics ASTRA ONE features a front-panel Monitor headphone connection with a dedicated level control. This allows system operators to listen to microphone audio directly from the receiver during setup and operation. The monitoring function is particularly useful for checking signal quality, adjusting microphone levels, and identifying potential audio issues before routing the signal into the main sound system.

The ASTRA ONE includes an automatic frequency scanning function to assist with selecting suitable operating frequencies in the surrounding RF environment. Once a frequency has been selected, infrared synchronization (IR Sync) allows the receiver and handheld transmitter to be paired conveniently. Users can verify the frequency and channel information on both the receiver and microphone displays before beginning operation.

The handheld transmitters offer two selectable RF transmission power settings: Low at 20 mW and High at 45 mW. The Low setting can be used for shorter operating distances, while the High setting provides increased transmission power when additional range is required. According to the supplied product information, the system can achieve an operating range of up to 300 meters in open areas using the High setting. Actual performance depends on obstacles, RF interference, antenna positioning, and environmental conditions.

For professional audio connectivity, the ASTRA ONE receiver provides independent balanced XLR outputs for CH1 and CH2, allowing each microphone signal to be connected to a separate mixing console channel. This enables independent control of volume, equalization, and signal processing for each performer. A dedicated Mix AF Out connection is also provided, allowing both microphone signals to be combined into a single output for installations or audio systems with limited input channels.

The receiver features a standard 1U rackmount design suitable for installation in a 19-inch equipment rack. Its aluminum front panel, integrated rack ears, and front handles make it suitable for both permanent installations and portable sound systems. Frequently used controls, including channel selection, volume adjustment, headphone monitoring, and power switching, are positioned on the front panel for convenient access.

Each handheld microphone features an LCD screen displaying frequency, channel information, battery level, and lock status. Additional operating functions include a temporary Mute mode and a button-lock feature to help prevent accidental setting changes during performances. Each microphone operates on two 1.5V AA batteries, with a reported battery life of approximately 5–8 hours depending on battery type, RF transmission power, and usage conditions.

The included handheld microphones use dynamic capsules with a Supercardioid pickup pattern, designed to emphasize sound from the front while reducing some off-axis sound pickup. This makes them suitable for spoken-word applications and vocal performances when correctly positioned. The microphone heads are removable and replaceable, and the supplied retailer information indicates compatibility with certain Shure microphone capsules without an additional adapter. Compatibility should be confirmed for the specific replacement capsule before installation.

Key Features

• Dual-Channel UHF Wireless System: Includes two handheld wireless microphones and a dual-channel receiver for simultaneous microphone operation.
• UHF Operating Frequencies: Operates within the specified frequency ranges of 694.5–702.7 MHz and 748.3–757.7 MHz.
• Four-Antenna Receiver: Features four receiving antennas, with independent A/B antenna reception for each wireless channel.
• Independent LCD Displays: Separate receiver displays for CH1 and CH2 show channel, frequency, and lock status information.
• A/B RF Signal Monitoring: Dedicated RF meters help operators monitor received signal strength through the individual antenna paths.
• 8-Level Audio Meters: Visual audio level indicators provide convenient signal monitoring for each microphone channel.
• Independent Channel Volume Adjustment: VOX1 and VOX2 selection buttons work with the Volume control to adjust the selected microphone channel.
• Front-Panel Headphone Monitoring: Dedicated Monitor headphone connection and level control allow direct listening from the receiver.
• Automatic Frequency Scanning: Auto Scan function assists in identifying suitable wireless operating frequencies before use.
• Infrared Frequency Synchronization: IR Sync enables convenient frequency pairing between the receiver and handheld transmitters.
• Selectable RF Transmission Power: Offers Low 20 mW and High 45 mW transmission settings for different operating requirements.
• Up to 300 m Open-Area Range: Reported maximum operating distance of 300 meters in open conditions using the High RF setting, depending on the environment.
• Independent Balanced XLR Outputs: Separate CH1 and CH2 balanced XLR connections support independent mixing and signal processing.
• Mix AF Output: Combines both wireless microphone signals into one output for systems with limited mixer inputs.
• 1U Rackmount Receiver: Standard 1U receiver supports installation in a 19-inch equipment rack with integrated rack ears and front handles.
• Aluminum Front Panel: Durable aluminum front panel with conveniently arranged controls and monitoring connections.
• Handheld Microphone LCD Screens: Each handheld transmitter displays operating frequency, channel, battery level, and lock status.
• Mute and Button-Lock Functions: Supports temporary microphone muting and control locking to help prevent accidental adjustments.
• AA Battery Operation: Each handheld microphone uses two 1.5V AA batteries, with a reported operating time of approximately 5–8 hours.
• Dynamic Supercardioid Capsules: Dynamic microphone capsules with a Supercardioid polar pattern suitable for vocals and speech.
• Replaceable Microphone Heads: Removable capsule design allows compatible microphone heads to be replaced, subject to model-specific compatibility verification.
• Versatile Audio Applications: Suitable for live stages, event production, conferences, presentations, karaoke systems, and permanent audio installations.

River Acoustics ASTRA ONE: Flexible Dual-Channel Wireless Performance with Comprehensive Monitoring and Professional Connectivity

The River Acoustics ASTRA ONE combines two UHF wireless handheld microphones with a dual-channel receiver designed for convenient system monitoring and versatile audio routing. Featuring four antennas, independent LCD displays, A/B RF meters, 8-level audio indicators, automatic frequency scanning, and infrared synchronization, the system provides practical tools for wireless microphone setup and operation. Front-panel headphone monitoring and independent channel volume adjustment offer additional control, while balanced XLR outputs and a combined Mix AF Out connection support a variety of mixing configurations. With its 1U rackmount receiver and replaceable dynamic Supercardioid microphone capsules, the ASTRA ONE is a flexible solution for live performances, conferences, karaoke applications, and professional audio installations.