STABCL Professional 4 Channel Wireless Microphones System ST-304 User Manual

1. Introduction

This manual provides detailed instructions for the setup, operation, and maintenance of your STABCL Professional 4 Channel Wireless Microphones System. This UHF wireless system is designed for clear audio transmission, suitable for various applications including singing, karaoke, church events, and DJ performances. Please read this manual thoroughly before using the product to ensure proper function and longevity.

2. Package Contents

Verify that all items listed below are included in your package:

• Wireless Receiver (x1)
• Handheld Microphones (x4)
• Antennas (x4)
• Anti-slip Rings (x4)
• 1/4'' Audio Cable (x1)
• Power Adapter (x1)
• Instruction Manual (x1)

Figure 2.1: Contents of the STABCL Wireless Microphone System package.

3. Product Overview

3.1. UHF Wireless Receiver

The receiver unit is the central component of the wireless system, responsible for receiving audio signals from the microphones and outputting them to your audio equipment. It features a sturdy metal build and four antennas for enhanced signal reception and stability.

Figure 3.1: UHF Wireless Receiver with antennas and microphones.

Figure 3.2: Receiver Panel Functions.

Receiver Controls and Indicators:

1. On/Off Switch: Powers the unit on or off.
2. Function Selection Button: Used for optional frequency point function and lock button function.
3. Automatic Frequency Pairing Button: Press to select a frequency point, then long press for 5 seconds to automatically search for a new frequency point.
4. LCD Display Window: Shows real-time information such as channel, frequency, and microphone power level.
5. Frequency Point Up and Down Selection Button: Adjusts frequency and volume.
6. RF and AF Signal Indicators: Display radio frequency and audio frequency signal strength.
7. Infrared to Frequency IR Window: Used for infrared synchronization with microphones.
8. Power In Jack (DC12V): Connects to the power adapter.
9. Antenna Ports: Connect the included antennas.
10. Mix Audio Output (6.35mm Phone Jack): Combined audio output for all channels.
11. Balanced Audio Output (XLR Jack): Individual balanced audio outputs for each channel.

3.2. Handheld Microphones

The system includes four durable metal handheld microphones, each equipped with a cardioid dynamic cartridge for clear sound. They feature adjustable frequencies and a comfortable grip.

Figure 3.3: Handheld Microphone Design Features.

Figure 3.4: Handheld Microphone Components.

Microphone Features:

• Adjustable Frequencies: Each microphone supports 50 frequency options (540Mhz-590Mhz).
• LCD Display: Shows current channel, frequency, and battery level.
• One-touch Mute: Quickly mute the microphone.
• Transmit Power Selector: High/Low switch for adjusting transmission power.
• Battery Powered: Each microphone requires 2 x AA batteries (not included).

4. Setup Instructions

1. Connect Antennas: Screw the four antennas into the designated antenna ports on the rear panel of the wireless receiver. Ensure they are securely fastened and positioned vertically for optimal signal reception.
2. Power the Receiver: Connect the provided power adapter to the DC12V Power In Jack on the receiver's rear panel, then plug the adapter into a suitable power outlet. Turn on the receiver using the On/Off switch. The LCD display should illuminate.
3. Install Microphone Batteries: Unscrew the bottom cap of each handheld microphone. Insert 2 x AA batteries (not included) into each microphone, observing the correct polarity (+/-). Screw the cap back on.
4. Power On Microphones: Press and hold the power button on each microphone until its LCD display illuminates.
5. Automatic Frequency Pairing (Auto Scan):
   • On the receiver, press the SET button to initiate automatic frequency scanning. The receiver will search for available frequencies.
   • Once a new frequency appears on the receiver's display, click the SET button again to initiate IR synchronization.
   • Align the infrared window on the microphone (usually near the display) with the infrared window on the receiver. The microphone and receiver will pair automatically. Repeat this process for all four microphones.
6. Connect to Audio Equipment:
   • For a combined output, connect the 1/4'' audio cable from the receiver's Mix Audio Output to an input on your amplifier, mixer, or PA system.
   • For individual channel control, use XLR cables (not included) to connect each of the receiver's Balanced Audio Outputs to separate inputs on a professional audio mixer.

Figure 4.1: Automatic Frequency Pairing Process.

5. Operating Instructions

1. Adjusting Volume: Each channel on the receiver has an independent volume control. Adjust these to achieve the desired audio level for each microphone. Start with lower volumes and gradually increase to prevent feedback.
2. Frequency Selection:
   • Auto Scan: As described in the setup, the auto-scan function helps find clear frequencies.
   • Manual Selection: If interference occurs, you can manually change the frequency for each microphone. Refer to the receiver's display and use the frequency selection buttons to cycle through available frequencies. Re-sync the microphone via IR after changing the frequency on the receiver.
3. Microphone Mute Function: Press the power button on the microphone briefly to mute/unmute the microphone. The display will indicate the mute status.
4. Transmit Power (Microphone): Use the High/Low selector switch inside the microphone's battery compartment to adjust transmit power. "High" provides a stronger signal for longer distances but consumes more battery. "Low" is suitable for shorter distances and conserves battery life.
5. Frequency Locking: The system includes a frequency locking function to prevent accidental changes during performance. Consult the receiver's function selection button (item 2 in Figure 3.2) for details on activating this feature.
6. Compatibility: The system is compatible with various audio devices.

Figure 5.1: Wide Compatibility with Audio Devices.

5.1. Multi-System Operation

This system supports the simultaneous use of up to 4 receiver sets, allowing for a maximum of 16 microphones to operate concurrently. Ensure each system is set to different frequency groups to avoid interference.

Figure 5.2: Multi-System Setup for up to 16 Microphones.

6. Maintenance

• Cleaning: Use a soft, dry cloth to clean the receiver and microphones. Do not use liquid cleaners or solvents, as these can damage the components.
• Battery Replacement: Replace microphone AA batteries when the battery indicator on the microphone's LCD display shows low power. Always use fresh, high-quality batteries.
• Storage: When not in use for extended periods, remove batteries from the microphones and store the system in a cool, dry place away from direct sunlight and extreme temperatures.
• Antenna Care: Handle antennas carefully to avoid bending or breaking.

7. Troubleshooting

8. Specifications

Figure 8.1: System Indicators.

9. Warranty and Support

For warranty information, technical support, or service inquiries, please refer to the contact information provided with your purchase or visit the official STABCL website. Keep your purchase receipt as proof of purchase for any warranty claims.