1. Introduction
Thank you for purchasing the G-MARK G2.1IEM Wireless In-Ear Monitor System. This system is designed to provide a professional and easy-to-use monitoring experience for various applications including stage performances, studio recordings, and live events. Please read this manual carefully before use to ensure proper operation and to maximize the system's performance. If you have any questions, please contact G-MARK support.
This system features enhanced RF performance, stable transmission up to 100 meters, and supports multiple connections for team monitoring. It operates in the UHF band with adjustable frequencies and offers clear, high-quality audio.
2. Setup Guide
2.1 Package Contents
Before you begin, please verify that all items are present in your package:
Figure 2.1: G-MARK G2.1IEM Product List
- 1 x Wireless In-Ear System Transmitter (Desktop Unit)
- 1 x UHF Bodypack Receiver
- 1 x In-ear Earbud (Headset)
- 1 x Power Adapter
- 1 x Antenna
- 2 x 6.35mm Audio Cables
- 1 x User Manual (this document)
2.2 Important Tips for Optimal System Performance
- Placement: Do not place the receiver near radio wave emitters, magnetic objects, or most digital devices (such as CD players, computers, speakers, Wi-Fi routers, etc.) to avoid interference.
- Height: Position the receiver at a height of approximately 1.5 meters (5 feet) from the ground and 1 meter (3 feet) from any walls to ensure optimal signal reception.
2.3 Desktop Transmitter Overview
Figure 2.2: G-MARK G2.1IEM System Components
Front Panel Controls:
- 6.35mm Headphone Output: Connect stereo headphones to monitor the output signal.
- Headphone Volume Potentiometer: Adjust the volume of the stereo headphones.
- Function Setting Buttons: Select and set various functions.
- LCD Display: Shows operation and setting content.
- Power Switch: Turns the power supply on or off.
Rear Panel Connections:
Figure 2.3: Rear Panel of Desktop Transmitter
- DC Power Supply: Connect the 12V DC power input socket. The center pin is positive voltage.
- Left Channel Input (AF IN (L)): Balanced and unbalanced shared input for the left audio channel.
- Right Channel Input (AF IN (R)): Balanced and unbalanced shared input for the right audio channel.
- Left Volume Potentiometer: Adjust the volume level for the left channel.
- Right Volume Potentiometer: Adjust the volume level for the right channel.
- Antenna: Connect the provided antenna for signal transmission.
2.4 Pocket Receiver Overview
Figure 2.4: Pocket Receiver Diagram
- Transmission Antenna: For receiving signals from the desktop transmitter.
- Rotary Switch (Volume Knob): Turns the receiver ON/OFF and adjusts headphone volume.
- Liquid Crystal Display (LCD): Shows frequency, channel, and battery status.
- Battery Holder: Insert AA batteries. Ensure correct polarity (+/-).
- Earphone Jack: Connect your in-ear headphones.
- Function Setting Keys: Buttons for frequency/channel selection.
2.5 Audio Interface Connection Method
Figure 2.5: Connecting to a Mixer
The G-MARK G2.1IEM system is compatible with various audio devices. To connect the desktop transmitter to a mixer, use the provided 6.35mm audio cables to connect the mixer's headphone jack or audio output to the AF IN (L) and AF IN (R) inputs on the rear panel of the desktop transmitter.
3. Operating Instructions
3.1 Manual Frequency Group Selection
To ensure clear and interference-free monitoring, it is crucial to correctly set the frequency/channel for both the desktop transmitter and the pocket receiver.
Desktop Transmitter Usage Settings:
- Power On/Off: Long press the POWER button to turn the unit on or off.
- Group Selection:
a. Press the SELECT key to enter the frequency group selection mode.
b. Use the function setting buttons (up/down arrows, if available, or repeated SELECT presses) to choose the desired frequency group.
c. After selecting the frequency group, the display will automatically return to the frequency interface after 3 seconds.
Waist Pocket Receiver Usage Settings:
- Power On/Off: Turn the volume potentiometer (rotary switch) to the ON position to power on the receiver. Turn it to OFF to power off.
- Group Selection:
a. Press the ▲ (up) or ▼ (down) key to select the frequency group corresponding to the same channel (CHA/B) as set on the desktop transmitter.
b. After selecting the frequency group, the display will automatically return to the frequency interface after 3 seconds.
3.2 How to Adjust Frequency (FlashMatch)
The G-MARK G2.1IEM features an exclusive "FlashMatch" function for quick and automatic frequency synchronization.
Figure 3.1: FlashMatch Feature
- On the Desktop Transmitter: Press the SELECT button to enter the adjustment state.
- Select Channel: Press the appropriate button (e.g., up/down arrows or SELECT) to select a channel (e.g., CH01). The frequency will appear after one second.
- On the Bodypack Receiver: Open the battery cover. Press the up or down button to select the same channel (e.g., CH01). The system will automatically link successfully.
Note: When CH02 or other channels are selected on the transmitter, the frequency on the bodypack will change automatically to match.
4. Maintenance
To ensure the longevity and optimal performance of your G-MARK G2.1IEM system, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the exterior of the transmitter and receiver. Do not use liquid cleaners or solvents.
- Battery Replacement: For the bodypack receiver, replace AA batteries when the low battery indicator appears on the LCD. Ensure correct polarity when inserting new batteries.
- Storage: Store the system in a cool, dry place away from direct sunlight, extreme temperatures, and high humidity.
- Cable Care: Handle audio cables and antenna carefully. Avoid sharp bends or excessive pulling that could damage the connectors or wiring.
- Antenna: Ensure the antenna on both the transmitter and receiver is securely attached and not bent or damaged.
5. Troubleshooting
If you encounter any issues with your G-MARK G2.1IEM system, please refer to the table below for common problems and solutions. Do not attempt to disassemble the equipment for maintenance without authorization, as this will void the warranty.
| Trouble | Status | Solutions |
|---|---|---|
| No sound / Faint sound | Recipient turns off the LCD monitor |
|
| Receiver LCD Display off |
| |
| LCD screen / Transmitter display No RF / Signal receiver Signal indicator does not light up |
| |
| Distortion or excess Burst noise | No light / Receiver shows RF signal |
|
6. Specifications
6.1 Monitoring System Parameters (G2.1 / G2000)
Figure 6.1: Monitoring System Parameters
| Parameter | Value |
|---|---|
| Modulation System | m / 4-DQPSK |
| Frequency Range | 610~786MHz, 2x100/4x50CHs |
| Sampling Rate | 48KHz |
| Transmission Speed | 204.8Kbps |
| Dynamic Range | >90dB |
| Total Harmonic Distortion | <0.1% |
| Delay Time Of Audio Transmission | <3ms |
| S/N Ratio | >96dB |
| Frequency Response | 30~20KHz |
| RX Sensitivity | <-94dBm |
6.2 Receiver Technical Parameters
| Parameter | Value |
|---|---|
| Oscillation Method | PLL Phase Locked Frequency Synthesis |
| Frequency Range | 500-599MHZ |
| Preset Channels | 100 groups of channels |
| FM Method | Adjustable |
| Frequency Response | 80Hz-15KHz +3dB |
| Output Power | 2*35W |
| Headphone Load Impedance | >16Ω |
| Output Socket | 3.5mm stereo headphone socket |
6.3 Transmitter Technical Parameters
| Parameter | Value |
|---|---|
| Chassis Height | 1 U |
| Material | Metal |
| Frequency Range | 500-599MHZ |
| Frequency Interval | 25MHZ |
| Number of Channels | 100 groups of frequencies can be selected |
| Transmit Output Power | 100mW |
| Audio Input | XLR or 6.5mm universal socket |
| Headphone Output | 6.5MM, volume adjustable |
| Current Consumption | DC12V/250mA |
| Antenna Input Socket | TNC socket |
7. User Tips
- Multiple Bodypacks: The system supports an unlimited quantity of bodypack receivers, allowing for comprehensive stage monitoring for an entire team. Additional bodypacks can be added as needed.
- Mono/Stereo Settings: The desktop transmitter features separate Left and Right channel inputs (AF IN (L) and AF IN (R)) and a 6.35mm stereo headphone output, indicating support for stereo audio monitoring. Ensure your audio source and headphones are compatible for stereo sound.
- Rack Mounting: The desktop transmitter is designed to be installed on standard rack units for professional setups.
8. Warranty and Support
For detailed warranty information and support, please refer to the official G-MARK documentation. A comprehensive user manual in PDF format is available for download at G-MARK G2.1/G2000 In-Ear Monitor Systems User Instruction (PDF). This PDF contains additional information and diagrams that may be helpful.
For any questions or assistance, please contact G-MARK customer support.
