1. Introduction
The XTUGA KX821 is a wireless instrument microphone system designed for brass instruments such as saxophones, trumpets, French horns, tubas, trombones, and baritones. It offers stable signal transmission and clear sound capture, providing freedom of movement during performances.
Key Features:
- Versatile Compatibility: Suitable for a wide range of brass instruments.
- Extended Wireless Range: Stable signal transmission up to 50 meters (164 feet).
- Instrument-Friendly Design: Clip-on mechanism with soft silicon material protects instruments.
- Clear Audio Capture: Noise-reduction microphone for accurate sound pickup.
- Broad Equipment Compatibility: 6.35mm receiver plug works with loudspeakers, amplifiers, mixers, and computer audio.
- Long Battery Life: Built-in 800mAh rechargeable lithium battery provides approximately 6 hours of use.
- Easy Operation: Simple plug-and-play setup.
2. Package Contents
Please verify that all items listed below are included in your package:
Image: XTUGA KX821 Wireless Microphone System components including the transmitter, receiver, charging cable, user manual, and product packaging.
- 1 x XTUGA KX821 Wireless Microphone Transmitter
- 1 x XTUGA KX821 Wireless Microphone Receiver
- 1 x USB Charging Cable
- 1 x User Manual
3. Product Components
Familiarize yourself with the different parts of your XTUGA KX821 system:
Image: Detailed diagram of the XTUGA KX821 transmitter and receiver components.
Transmitter (Microphone Unit):
- Microphone
- Clip
- Display light
- Power button
- Frequency lock/change button
- Charging port
- Battery compartment
- Antenna
Receiver (Plug Unit):
- 6.35mm plug
- Display light
- Power button
- Reset button
- Charging port
- Battery compartment
- Antenna
4. Setup Guide
4.1. Charging the Device
Before initial use, fully charge both the transmitter and receiver. A full charge typically takes 1-2 hours and provides 4-6 hours of continuous use.
Image: Battery life and charging time indicators for the XTUGA KX821 system.
- Connect the USB charging cable to the charging port (6 or 13) on both the transmitter and receiver.
- Connect the other end of the USB cable to a standard USB power adapter (not included).
- The display light (3 or 10) will indicate charging status and turn off or change color when fully charged.
4.2. Connecting the Transmitter
The transmitter unit, which includes the microphone, is designed to clip directly onto your instrument.
Image: Close-up of the microphone's damping spring condenser and retaining clip.
- Gently open the clip (2) and attach the transmitter securely to the bell or rim of your instrument.
- Adjust the flexible gooseneck of the microphone (1) to position it optimally for sound capture, typically near the instrument's sound source.
- The soft silicon material of the clip is designed to prevent damage to your instrument.
4.3. Connecting the Receiver
The receiver unit connects to your audio equipment.
Image: Receiver connected to various audio equipment.
- Insert the 6.35mm plug (9) of the receiver into the corresponding input jack on your loudspeaker, amplifier, audio interface, or mixer.
- Ensure the connection is firm.
4.4. Powering On and Pairing
The system uses UHF automatic frequency pairing for ease of use.
Image: UHF automatic frequency pairing in action.
- Press and hold the Power button (4) on the transmitter until the display light (3) illuminates.
- Press and hold the Power button (11) on the receiver until the display light (10) illuminates.
- The transmitter and receiver will automatically pair. The display lights will indicate a successful connection (e.g., solid green).
- The system supports 16 frequency points, allowing multiple sets to be used simultaneously without interference.
5. Operating Instructions
5.1. Instrument Compatibility
The XTUGA KX821 is compatible with a variety of brass instruments:
Image: Compatible musical instruments for the XTUGA KX821 system.
- Soprano, Alto, Tenor, and Baritone Saxophones
- Trumpets
- French Horns
- Tubas
- Trombones
- Clarinets (also compatible)
5.2. Optimal Microphone Placement
For best sound quality, position the microphone close to the sound source of your instrument. Experiment with different angles and distances to find the ideal placement that captures your instrument's natural tone while minimizing unwanted noise.
5.3. Wireless Range
The system provides a stable wireless connection up to 50 meters (164 feet) in open areas. Maintain a clear line of sight between the transmitter and receiver for optimal performance. Obstacles such as walls or large metal objects may reduce the effective range.
Image: Illustration of the wireless signal range.
5.4. Frequency Management
The XTUGA KX821 features UHF automatic frequency pairing. If you experience interference or need to use multiple systems simultaneously, you can utilize the frequency lock/change button (5) on the transmitter to cycle through available frequencies. Ensure all units are paired to distinct frequencies when using multiple systems.
6. Maintenance
6.1. Cleaning
- Wipe the transmitter and receiver with a soft, dry cloth.
- Do not use abrasive cleaners, solvents, or harsh chemicals, as these can damage the finish or internal components.
- Ensure the microphone foam cover is clean and free of debris.
6.2. Battery Care
- To prolong battery life, avoid completely draining the battery frequently.
- Charge the device regularly, even if not in frequent use, to maintain battery health.
- Do not expose the device to extreme temperatures.
6.3. Storage
- Store the system in a cool, dry place away from direct sunlight and moisture.
- When storing for extended periods, ensure the batteries are partially charged (around 50%) to prevent degradation.
7. Troubleshooting
If you encounter issues with your XTUGA KX821 system, please refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound output |
|
|
| Intermittent sound or static |
|
|
| Short battery life |
|
|
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | KX821 |
| Brand | XTUGA |
| Connectivity Technology | UHF |
| Connector Type | 6.35 mm Jack |
| Microphone Form Factor | Microphone System (Clip-On) |
| Polar Pattern | Unidirectional |
| Power Source | Battery Powered |
| Battery Type | Lithium Polymer (800mAh) |
| Number of Batteries | 2 (included) |
| Use Time | 4-6 hours (approx.) |
| Charging Time | 1-2 hours (approx.) |
| Wireless Range | Up to 50 meters (164 feet) |
| Material | Plastic |
| Color | Silver |
| Item Weight | 1.4 pounds |
| Package Dimensions | 9 x 8 x 2.5 inches |
| Compatible Devices | Audio Interface, Audio Mixer, Laptop, Personal Computer, Smartphone (with appropriate adapters) |
9. Warranty and Support
XTUGA products are designed for reliability and performance. For warranty information, please refer to the documentation included with your purchase or visit the official XTUGA website.
If you require technical assistance or have questions regarding your XTUGA KX821 Wireless Saxophone Microphone System, please contact XTUGA customer support through their official channels. Be prepared to provide your product model number (KX821) and purchase details.





