1. Introduction
This manual provides comprehensive instructions for the setup, operation, and maintenance of your QFX M-336 Wireless Dynamic Professional Microphone Twin Pack. 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:
- Two (2) QFX M-336 Unidirectional Dynamic Microphones
- One (1) Wireless Receiver with Dual Signal Indicator and Telescoping Antennas
- Two (2) 9-volt Batteries
- One (1) Audio Output Cable
3. Product Overview
Familiarize yourself with the components of your QFX M-336 system.
3.1. Microphones

Image: Two QFX M-336 wireless microphones, showing their black bodies, gold bands, and on/off switches.

Image: Close-up view of the microphone head, highlighting the mesh grille and QFX M-336 branding.
3.2. Wireless Receiver

Image: Front view of the QFX M-336 wireless receiver, featuring the power switch, signal indicators (A and B), and extended telescoping antennas.

Image: Rear view of the QFX M-336 wireless receiver, displaying the audio output jack, power input (60Hz AC110V), and antenna connections.
4. Setup Instructions
Follow these steps to set up your wireless microphone system:
- Install Batteries in Microphones: Unscrew the bottom part of each microphone. Insert one (1) 9-volt battery into each microphone, ensuring correct polarity. Screw the bottom part back on securely.
- Position the Receiver: Place the wireless receiver on a stable surface, away from potential sources of interference such as large metal objects or other wireless devices. Extend the telescoping antennas for optimal signal reception.
- Connect to Audio System: Connect the audio output jack on the back of the receiver to the microphone input of your PA system, karaoke machine, or amplifier using the provided audio output cable.
- Power On: Plug the receiver's power adapter into a standard AC outlet. Turn on the receiver using the power switch on the front panel. The power indicator light should illuminate.
5. Operating Instructions
Once set up, operating your QFX M-336 system is straightforward:
- Turn On Microphones: Slide the ON/OFF switch on each microphone to the 'ON' position. The microphone's indicator light should turn on.
- Verify Connection: The corresponding signal indicator (A or B) on the receiver should light up when a microphone is turned on and connected.
- Adjust Volume: Adjust the volume level on your connected audio system (PA system, karaoke machine, etc.) to a comfortable listening level.
- Optimal Usage: For best performance, hold the microphone approximately 2-6 inches from your mouth. Avoid covering the microphone grille with your hand. Maintain a reasonable distance between the microphones and the receiver, and ensure a clear line of sight if possible.
- Standby Mode: If your microphone has a standby switch, use it to temporarily mute the microphone without turning it off completely. To resume audio, switch it back to the 'ON' position.
6. Maintenance
Proper maintenance ensures the longevity and optimal performance of your microphone system.
- Battery Replacement: Replace the 9-volt batteries in the microphones when the indicator light dims or audio quality degrades. Always use fresh batteries.
- Cleaning: Wipe the microphones and receiver with a soft, dry cloth. Do not use liquid cleaners or solvents, as they may damage the finish or internal components.
- 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.
7. Troubleshooting
If you encounter issues with your QFX M-336 system, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound from microphone | Microphone off, dead batteries, receiver off, incorrect audio connection, audio system muted. | Ensure microphone and receiver are on. Replace batteries. Check all cable connections. Verify audio system volume and mute settings. |
| Poor sound quality, static, or dropouts | Weak batteries, interference, distance from receiver, obstructions, receiver antennas not extended. | Replace microphone batteries. Reduce distance between microphone and receiver. Extend receiver antennas fully. Avoid placing receiver near other electronics. Ensure clear line of sight. Note: Some karaoke machines with built-in CD players may experience compatibility issues. |
| Microphone not connecting to receiver | Microphone or receiver off, out of range, interference. | Ensure both units are powered on. Move closer to the receiver. Turn off and restart both the microphone and receiver. |
| Low volume output | Audio system volume too low, microphone sensitivity. | Increase volume on your connected audio system. Ensure microphone is held close enough to the sound source. |
8. Specifications
| Feature | Specification |
|---|---|
| Model Number | M-336 |
| Microphone Type | Unidirectional Dynamic |
| Connectivity | Wireless |
| Impedance | 600 Ohm |
| Signal-to-Noise Ratio | 85 dB |
| Frequency Response | 1 KHz |
| Power Source (Microphone) | 9V Battery (x2 required) |
| Item Dimensions (L x W x H) | 9 x 5 x 3 inches |
| Item Weight | 0.25 Pounds (per microphone) / 4 ounces (total system) |
| Recommended Use | Karaoke, PA Systems |
9. Safety Information
WARNING: Cancer and Reproductive Harm – For more information, please visit www.P65Warnings.ca.gov. This warning is provided in compliance with California Proposition 65.
10. Warranty and Support
For warranty information or technical support, please contact QFX customer service. Refer to the product packaging or the official QFX website for current contact details.





