G-MARK EW100 Professional UHF Wireless Microphone System User Manual

1. Introduction

Thank you for choosing the G-MARK EW100 Professional UHF Wireless Microphone System. This system is designed to provide high-fidelity sound quality and reliable wireless performance for various applications, including karaoke, home entertainment, conferences, stage performances, and more. Featuring a dual UHF wireless design with selectable frequencies and PLL frequency synthesized technology, it ensures clear audio transmission with minimal dropouts and maximum feedback rejection.

The G-MARK EW100 system is engineered for ease of use, offering quick IR synchronization and adjustable volume control. Its robust construction and advanced features make it an excellent choice for both amateur and professional users seeking a dependable wireless microphone solution.

Figure 1: G-MARK EW100 Wireless Microphone System Overview

2. Package Contents

Please check the package carefully to ensure all items are present and in good condition:

1 x Wireless Receiver
2 x UHF Wireless Handheld Microphones
1 x 1/4" Audio Cable
1 x Power Adapter
2 x Antennas
2 x Roll Rings (Anti-roll protection for microphones)
1 x User Manual (This document)

G-MARK EW100 Product List — Figure 2: Contents of the G-MARK EW100 package

3. Product Overview

3.1. Receiver Components

G-MARK EW100 Receiver Front Panel — Figure 3: Receiver Front Panel. Features include: Switch (Power), Display (showing frequency and signal strength), Volume adjustment knobs, and Control buttons for frequency selection.

G-MARK EW100 Receiver Rear Panel — Figure 4: Receiver Rear Panel. Connections include: Power interface (DC9V-12V 500mA-1A), Channel B antenna, Balanced Out B (XLR interface), Balanced Out A (XLR interface), Mix Out (1/4" audio output), and Channel A antenna.

3.2. Microphone Components

G-MARK EW100 Microphone Internal Components — Figure 5: Handheld Microphone Internal Components. Key parts include: Red Cotton Mesh Head, Dynamic microphone core, Battery compartment, and a Link key for frequency adjustment.

G-MARK EW100 Microphone Head Detail — Figure 6: Microphone Head Detail. Shows the metal skull for durability and the internal structure designed for clear sound quality.

4. Setup Instructions

Unpack the System: Carefully remove all components from the packaging.
Connect Antennas: Screw the two antennas onto the ANT-A and ANT-B connectors on the rear panel of the receiver.
Connect Power: Plug the power adapter into the DC9V-12V power interface on the receiver, then plug the adapter into a suitable power outlet.
Connect Audio Output: Connect the receiver's audio output to your audio system (mixer, amplifier, etc.). You can use either the Balanced Out A/B (XLR) for individual microphone outputs or the Mix Out (1/4" jack) for a combined output. Ensure you connect to a MIC input, not an AUX input, for proper sound levels.
Install Batteries in Microphones: Open the battery compartment of each handheld microphone and insert two 1.5V AA batteries, ensuring correct polarity.
Power On: Turn on the receiver using the power switch on the front panel. Then, turn on each microphone using its power button. The system will automatically synchronize frequencies.

Video 1: Demonstration of battery installation and frequency adjustment for the G-MARK EW100 microphone.

5. Operating Instructions

5.1. Basic Operation

After successful setup, ensure both the receiver and microphones are powered on.
Adjust the volume for each microphone using the individual volume adjustment knobs on the receiver's front panel.
Speak into the microphone to test the sound. The receiver's display will show RF (radio frequency) and AF (audio frequency) signal strength indicators.

5.2. Frequency Adjustment (Flash Match)

The G-MARK EW100 features a convenient 'Flash Match' function for quick frequency synchronization:

Ensure the receiver is powered on.
Open the battery cover of the handheld microphone to access the 'Link key' button.
Press the 'Link key' button once. The frequency displayed on the handheld microphone will change.
Observe the receiver's display. When the frequency on the receiver matches the frequency of the handheld microphone, the frequency adjustment is complete, and the microphone is synchronized.

G-MARK EW100 Flash Match Frequency Adjustment — Figure 7: Flash Match feature for one-click frequency adjustment between microphone and receiver.

G-MARK EW100 Frequency Adjustment Diagram — Figure 8: Detailed diagram illustrating the steps for adjusting the frequency on the G-MARK EW100 wireless microphone.

6. Maintenance

Cleaning: Use a soft, dry cloth to clean the surfaces of the receiver and microphones. Do not use liquid cleaners or abrasive materials.
Storage: Store the system in a dry, cool place away from direct sunlight and extreme temperatures.
Battery Care: If the microphones will not be used for an extended period, remove the batteries to prevent leakage and damage.
Antenna Care: Handle antennas carefully to avoid bending or breaking.

7. Troubleshooting

Problem	Possible Cause	Solution
No sound from microphone	Microphone or receiver not powered on; low batteries; incorrect audio connection; frequency mismatch.	Ensure all devices are powered on. Replace batteries. Check audio cable connection to MIC input. Perform frequency adjustment (Flash Match).
Interference or static noise	Other wireless devices operating on similar frequencies; obstacles blocking signal; too far from receiver.	Use the auto-scan function to find a clear frequency. Ensure clear line of sight between microphone and receiver. Reduce distance between microphone and receiver.
Weak or distorted sound	Low microphone volume; microphone too far from mouth; low batteries.	Increase microphone volume on the receiver. Hold microphone closer to your mouth. Replace batteries.
Microphone not pairing	Incorrect frequency adjustment procedure.	Follow the 'Flash Match' frequency adjustment steps carefully. Ensure the receiver is on when attempting to pair.

8. User Tips

Optimal Performance: For the best wireless performance, always ensure a clear line of sight between the handheld microphones and the receiver. Avoid placing the receiver behind large metal objects or in enclosed spaces.
Battery Life: Always use fresh, high-quality 1.5V AA batteries for the microphones. Consider using rechargeable batteries for environmental friendliness and cost savings.
Audio Connection: When connecting the receiver to your sound system, always use a dedicated microphone input (MIC IN) on your mixer or amplifier. Connecting to an auxiliary (AUX) input may result in low volume or poor sound quality.
Replacement Parts: If you require replacement parts such as microphone grilles or capsules, please contact G-MARK customer support for assistance.

9. Specifications

System Parameters:

Audio Frequency Response: 50Hz-18KHz
Dynamic Range: ≥ 80dB
System Distortion: ≤1%
Signal to Noise Ratio: ≥ 60dB
Ideal Operating Distance: 80m (open air)
Operating Temperature Range: 5℃ - 45℃
Carrier Frequency Range: 520-560 MHz
Channels: 2
Adjustment Frequency: Yes

Transmitter (Handheld Microphone):

Frequency Stability: ± 0.005%
Carrier Output Power: ≤ 30mW
Spurious Radiation Suppression: >40dB
Modulation: FM
Maximum Modulation: ± 75KHz
Pickup Mode: Dynamic Microphone (Moving Coil)
Power Source: 2 x 1.5V AA Batteries
Battery Power Consumption: <30mA
Dimensions: Ф37 x 250mm
Material: Plastic (ABS Engineering Plastics)
Polar Patterns: Cardioid

Receiver:

Receiver Sensitivity: <2μV
Mirror Suppression: > 40dB
To Increase: 50μS
Audio Output Impedance: 600Ω
Audio Output Level: 0-0.5V
Power Source: AC110-240V 50/60Hz
Power Consumption: 3W
Dimensions: 420 x 210 x 45mm
Material: Plastic

10. Warranty and Support

The G-MARK EW100 Professional UHF Wireless Microphone System comes with a 12-month manufacturer assurance. G-MARK is committed to providing supportive customer service.

For any troubleshooting, technical assistance, or replacement of discontinuous/defective parts, please contact G-MARK customer support. Our team is ready to assist you with any inquiries regarding your product.

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G-MARK EW100