ACEMIC ST-5 Wireless Instrument Microphone User Manual

1. Introduction

The ACEMIC ST-5 is a high-performance digital wireless audio transmission system designed for instrument stage performances, particularly suitable for saxophones and other wind instruments. It offers reliable, interference-free operation with its digital ID code technology and pre-set selectable frequencies, ensuring clear and stable sound transmission.

This manual provides detailed instructions on setting up, operating, maintaining, and troubleshooting your ST-5 wireless microphone system.

2. Product Contents

Please check the package contents upon unboxing to ensure all components are present:

• ST-5 Wireless Microphone (Condenser type with clip)
• ST-5 Wireless Transmitter
• ST-5 Wireless Receiver (6.35mm plug)
• USB Charging Cable
• User Manual (this document)

Figure 2.1: Overview of the ACEMIC ST-5 Wireless Microphone System, showing the microphone, transmitter, and receiver.

3. Key Features

• Digital Wireless Audio Transmission: Ensures high-fidelity sound and stable signal.
• 16 Selectable Frequencies: Pre-set channels to avoid interference.
• Digital ID Code: Advanced technology to completely eliminate frequency interference.
• IR Sync Function: Simplifies frequency pairing between receiver and transmitter.
• Extended Operating Range: Up to 40 meters (line-of-sight) for flexible movement.
• Long Battery Life: Over 6 hours of continuous use on a full charge (for both transmitter and receiver).
• Portable Plug-on Receiver: Directly connects to mixers or active speakers via a 6.35mm plug.
• Versatile Application: Ideal for saxophone stage performances, street performances, and other live sound needs.

4. Components Overview

4.1. Receiver

Figure 4.1.1: ACEMIC ST-5 Wireless Receiver.

The receiver is a compact unit designed to plug directly into your audio input device (mixer, amplifier, active speaker). It features a 6.35mm (1/4 inch) output plug, a display for channel indication, and buttons for power and synchronization.

• 6.35mm Plug: Standard audio output connector.
• Power Button: Turns the receiver on/off.
• SYNC Button: Initiates infrared synchronization with the transmitter.
• Display: Shows the currently selected channel number.
• IR Sensor: For infrared synchronization with the transmitter.

4.2. Transmitter and Microphone

Figure 4.2.1: ACEMIC ST-5 Wireless Transmitter with Microphone.

The transmitter is integrated with the condenser microphone, featuring a flexible gooseneck and a clip for easy attachment to instruments. It houses the battery and controls for power and frequency selection.

• Condenser Microphone: High-sensitivity microphone for clear audio capture.
• Flexible Gooseneck: Allows for precise positioning of the microphone.
• Instrument Clip: Securely attaches the microphone to the instrument.
• Power Button: Turns the transmitter on/off.
• Channel Selection Buttons: Used to manually change frequencies or initiate IR sync.
• IR Sensor: For infrared synchronization with the receiver.

5. Setup Guide

5.1. Charging the Devices

Both the receiver and transmitter are powered by internal lithium batteries. Before first use, ensure both units are fully charged.

1. Connect the provided USB charging cable to the charging port on both the receiver and the transmitter.
2. Plug the other end of the USB cable into a standard USB power adapter (e.g., phone charger, computer USB port).
3. The charging indicator light will illuminate during charging and turn off (or change color) when fully charged.
4. A full charge typically provides over 6 hours of continuous operation.

5.2. Attaching the Microphone

Carefully attach the microphone clip to your instrument. For saxophones, typically attach it to the bell or a suitable part of the instrument where the microphone can be positioned close to the sound source without obstructing play.

• Open the clip and secure it firmly to a stable part of the instrument.
• Adjust the flexible gooseneck to position the microphone capsule approximately 1-3 inches from the instrument's sound hole or bell, pointing towards the sound source.
• Ensure the microphone is securely attached and will not interfere with your performance.

5.3. Connecting the Receiver

The receiver plugs directly into your audio input device.

1. Locate a 6.35mm (1/4 inch) input jack on your mixer, amplifier, or active speaker.
2. Insert the receiver's 6.35mm plug firmly into the input jack.
3. Ensure the input channel on your audio device is set to an appropriate level and is not muted.

5.4. Powering On and Pairing (IR Sync)

To establish a wireless connection, the transmitter and receiver must be powered on and paired.

1. Power On Receiver: Press and hold the Power button on the receiver until the display illuminates.
2. Power On Transmitter: Press and hold the Power button on the transmitter until its indicator light illuminates.
3. Initiate IR Sync: With both units on, position the IR sensor of the transmitter close to the IR sensor of the receiver (within a few inches).
4. Press the SYNC button on the receiver. The receiver will send the selected frequency to the transmitter via infrared.
5. The display on both units should show the same channel number, indicating successful pairing. The RF indicator on the receiver should light up, confirming a stable wireless connection.
6. If interference occurs, you can change the channel on the receiver and repeat the IR sync process to find a clear frequency. The system offers 16 selectable frequencies.

6. Operating Instructions

6.1. Adjusting Audio Levels

Once connected and paired, adjust the input gain on your mixer or amplifier. Start with the gain low and gradually increase it until you achieve a clear, strong signal without distortion. Avoid setting the gain too high, which can lead to clipping and poor sound quality.

6.2. Performance Considerations

• Line-of-Sight: For optimal performance, maintain a clear line-of-sight between the transmitter and receiver. Obstacles like walls or large metal objects can reduce the operating range.
• Operating Range: The system has an operating range of up to 40 meters (approximately 130 feet) in ideal conditions.
• Battery Monitoring: Pay attention to the battery indicators on both units. Recharge them when the battery level is low to avoid interruptions during a performance.
• Multiple Systems: If using multiple ST-5 systems simultaneously, ensure each pair is set to a different frequency to prevent interference. The digital ID code helps in this regard.

7. Troubleshooting

8. Specifications

8.1. General System Specifications

• Frequency Range: Region dependent (Digital wireless audio transmission)
• Audio Sampling Mode: 48KHz
• Selectable Frequencies: Pre-set 16 channels
• ID Code: Digital ID code (solves frequency interference)
• Sync Method: IR Sync
• Operating Range: Up to 40m (line-of-sight)
• Suitable For: Saxophone stage performances, street performances, etc.
• Power Supply: 3.7V Lithium battery (internal, rechargeable)
• Continuous Use: >6 hours
• Signal-to-Noise Ratio: >92dB
• Noise Level: 92.0 dB

8.2. Receiver Specifications

• Modulation Mode: pi/4 DQPSK
• Latency: <6ms
• Frequency Response: 60Hz - 15KHz ± 2dB
• Total Harmonic Distortion: <0.8% (1KHz)
• Receiving Sensitivity: -92dBm
• Output: 6.35mm plug
• Dimensions: 185 x 20 x 10mm

8.3. Transmitter Specifications

• Modulation Mode: pi/4 DQPSK
• Transmitter Power: 10mW
• Sensitivity: -47 dB ± 2dB
• Frequency Change: IR Sync
• Microphone Type: Condenser
• Microphone Dimension: Φ14 x 5.0mm
• Dimensions: 125 x 40 x 20mm

9. Maintenance

Proper care and maintenance will extend the life of your ACEMIC ST-5 wireless microphone system.

• Cleaning: Use a soft, dry cloth to clean the exterior of the transmitter and receiver. Do not use liquid cleaners or solvents.
• Storage: When not in use, store the system in a cool, dry place, away from direct sunlight and extreme temperatures.
• Battery Care: For long-term storage, it is recommended to charge the lithium batteries to about 50% capacity every few months to maintain battery health. Avoid completely draining the batteries for extended periods.
• Handling: Handle the microphone and units with care. Avoid dropping them or subjecting them to strong impacts.

10. Warranty and Support

ACEMIC products are manufactured to high quality standards. For warranty information, technical support, or service inquiries, please refer to the warranty card included with your purchase or visit the official ACEMIC website. Please retain your proof of purchase for warranty claims.

For further assistance, you may contact your retailer or the manufacturer directly.