Introduction
The G-MARK G440XFM is a professional 4-channel UHF wireless microphone system designed for various applications including karaoke, stage performances, parties, and public speaking. Featuring a durable metal construction, frequency-adjustable channels, and G-MARK's proprietary dynamic capsules, this system ensures clear, stable, and high-quality audio transmission. This manual provides essential information for setting up, operating, and maintaining your wireless microphone system.
Package Contents
Please check the package carefully to ensure all items are present:
- 1 x Wireless Receiver
- 4 x UHF Wireless Handheld Microphones
- 1 x 1/4" Audio Cable
- 1 x Power Adapter
- 2 x Antennas
- 4 x Roll Rings
- 1 x User Manual
Specifications
| Feature | Description |
|---|---|
| Brand Name | G-MARK |
| Model | G440XFM |
| Set Type | Multi-Microphone Kits (4 Microphones) |
| Communication | Wireless (UHF) |
| Transducer | Dynamic Microphone |
| Style | Handheld Microphone |
| Frequency Range | 520-560MHz |
| Wireless Distance | Up to 50 meters (open air) |
| Channels | 4 (Frequency Adjustable) |
| Microphone Material | Metal |
| Receiver Material | Metal |
| Polar Patterns | Uni-directional |
| Certification | CE, FCC, RoHS, WEEE |
| Intended Use | Home Karaoke, Meetings, Stage, Church, Party, Wedding, Speech |
| Connectable Devices | Speaker, Audio Mixer, Professional Amplifier, Sound Card, Trolley Audio, Home Theater, Active Speaker |
Setup Guide
1. Receiver Connections
- Antenna Installation: Screw the two included antennas into the antenna interfaces on the rear panel of the receiver. Ensure they are securely tightened and positioned for optimal signal reception.
- Power Connection: Connect the power adapter to the DC 12V input on the rear panel of the receiver and plug it into a power outlet.
- Audio Output: Connect the 1/4" audio cable from the MIX OUT port on the receiver to the MIC input jack of your audio mixer, amplifier, or sound card. Alternatively, use the individual XLR outputs (A, B, C, D) for each channel if your audio system supports it.
2. Microphone Preparation
- Battery Installation: Unscrew the bottom part of each handheld microphone to access the battery compartment. Insert the required batteries (typically AA, check microphone for specific type) ensuring correct polarity.
- Power On: Press and hold the power button on each microphone to turn it on. The microphone's display will illuminate.
Operating Instructions
1. Powering On/Off
- Receiver: Press the Power switch on the front panel of the receiver to turn it on.
- Microphones: Press and hold the power button on each handheld microphone until the display illuminates.
2. Frequency Adjustment and Synchronization
The G440XFM system features PLL frequency synthesized technology for stable transmission and easy frequency adjustment. Refer to the video below for a visual guide.
- Unlock Frequency on Receiver: Simultaneously press the 'Up' and 'Down' buttons for the desired channel on the receiver. The red lock icon on the display will disappear, indicating it's unlocked.
- Change Microphone Frequency: Open the battery cover of the microphone. Locate the frequency switch button (AFH). Press this button to cycle through available frequencies.
- Automatic Matching: Once the microphone's frequency is changed, hold the microphone close to the receiver. The receiver will automatically synchronize its frequency with the microphone. The receiver's display will show the new frequency.
- Lock Frequency on Receiver: After successful synchronization, simultaneously press the 'Up' and 'Down' buttons for the channel on the receiver again to lock the frequency. This prevents accidental changes during use.
3. Volume Adjustment
- Select Channel: Press the middle button (often labeled 'Switch' or similar) for the desired channel on the receiver. The volume level will appear on the display.
- Adjust Volume: Use the 'Up' and 'Down' buttons for that channel to increase or decrease the volume level.
Maintenance
1. Cleaning
- Wipe the receiver and microphones with a soft, dry cloth.
- For stubborn dirt, use a slightly damp cloth and then dry thoroughly.
- Do not use abrasive cleaners, solvents, or harsh chemicals.
2. Storage
- When not in use for extended periods, remove batteries from the microphones to prevent leakage.
- Store the system in a cool, dry place away from direct sunlight and extreme temperatures.
3. Battery Care
- Replace batteries when the low battery indicator appears on the microphone display.
- Use high-quality batteries for optimal performance and longevity.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound from microphone | Microphone not powered on; Batteries low/dead; Frequency mismatch; Receiver not connected to audio input. | Ensure microphone is on; Replace batteries; Perform frequency synchronization (see Operating Instructions); Verify receiver is connected to a MIC input, not AUX. |
| Weak or intermittent signal | Distance too far; Obstructions; Interference from other devices; Low microphone battery. | Reduce distance between microphone and receiver; Ensure clear line of sight; Change frequency to a less congested channel; Replace microphone batteries. |
| Modulation frequency does not match (as seen in video) | Microphone and receiver are on different frequencies. | Unlock the receiver frequency, change the microphone frequency, and then perform automatic matching as described in the Operating Instructions. |
| Feedback (howling sound) | Microphone too close to speakers; Volume too high. | Increase distance between microphone and speakers; Lower microphone or system volume. |
User Tips
- Correct Audio Input: Always plug the receiver's audio output into a dedicated MIC jack on your audio system, not an AUX jack. Using an AUX jack may result in low volume or poor sound quality.
- Frequency Locking: After successfully synchronizing the microphone and receiver, remember to lock the frequency on the receiver. This prevents accidental frequency changes during live performances or events, ensuring stable operation.
- Optimal Placement: For best wireless performance, place the receiver in an open area, away from large metal objects, walls, and other electronic devices that might cause interference.
Warranty and Support
G-MARK products are manufactured to high-quality standards. For any technical support, warranty claims, or service inquiries, please contact the G-MARK Brand Store or your authorized retailer. Keep your purchase receipt as proof of purchase for warranty purposes.
Note: Warranty terms and conditions may vary by region and retailer. Please consult your specific purchase agreement for details.
