Audibax Missouri 2500 A Wireless Microphone System User Manual

1. Introduction

The Audibax Missouri 2500 A is a professional VHF dual wireless microphone system designed for clear and reliable audio transmission. This system includes a receiver unit and two bodypack transmitters, compatible with both headset and lavalier microphones. It is ideal for public speaking, presentations, live performances, karaoke, and singing, offering a stable connection with a range of up to 80 meters.

Key features include a high signal-to-noise ratio of 103 dB, reception frequencies of 179.300 MHz and 188.100 MHz, and a frequency response of 40 Hz to 18 kHz. The system's dynamic cardioid microphone capsules are optimized for frontal sound capture, minimizing ambient noise.

2. Safety Information

• Do not expose the unit to rain or moisture to prevent fire or electric shock.
• Do not open the casing. There are no user-serviceable parts inside. Refer all servicing to qualified personnel.
• Use only the specified power adapter.
• Ensure proper ventilation around the receiver unit.
• Dispose of batteries responsibly according to local regulations.
• Keep the system away from strong electromagnetic fields.

3. Package Contents

Please check that all items listed below are included in your package:

• 1x Audibax Missouri 2500 A Receiver Unit
• 2x Bodypack Transmitters
• 2x Headset Microphones
• 2x Lavalier Microphones
• 1x Power Adapter for Receiver
• 1x Audio Output Cable (XLR to 1/4" Jack)
• 1x User Manual

4. Product Overview

4.1. System Components

Figure 4.1: Complete Audibax Missouri 2500 A Wireless Microphone System.

4.2. Receiver Unit

Figure 4.2: Front Panel of the Receiver Unit.

• Power Switch: Turns the receiver ON/OFF.
• Display: Shows current channel frequencies (179.30 MHz / 188.10 MHz).
• RF/AF Indicators: RF (Radio Frequency) indicates signal reception from the transmitter. AF (Audio Frequency) indicates audio signal presence.
• Volume Knobs: Independent volume control for each microphone channel (A and B).

Figure 4.3: Rear Panel of the Receiver Unit.

• Antenna Connectors (ANT A, ANT B): For connecting the included antennas.
• Balanced XLR Output: Professional audio output for connecting to mixers or amplifiers.
• Mixed Auxiliary Output (1/4" Jack): Standard audio output for connecting to various audio equipment.
• Power Input (220V-50Hz): For connecting the power adapter.

4.3. Bodypack Transmitters

Figure 4.4: Front View of a Bodypack Transmitter.

Figure 4.5: Rear View of a Bodypack Transmitter.

• ON/OFF/MUTE Switch: Controls power and mutes the microphone.
• Microphone Input Jack: For connecting headset or lavalier microphones.
• Battery Compartment: Holds AA batteries (not included).
• Belt Clip: For attaching the transmitter to clothing.

4.4. Microphones

Figure 4.6: Headset Microphones.

Figure 4.7: Lavalier Microphones.

• Headset Microphones: Worn over the head, providing hands-free operation.
• Lavalier Microphones: Small, clip-on microphones for discreet placement on clothing.
• Both types feature dynamic cardioid capsules for focused sound pickup.

5. Setup Instructions

1. Unpack Components: Carefully remove all items from the packaging.
2. Connect Antennas: Screw the two antennas onto the ANT A and ANT B connectors on the rear of the receiver unit. Ensure they are securely tightened and positioned vertically for optimal reception.
3. Power the Receiver: Connect the provided power adapter to the receiver's power input (220V-50Hz) and plug it into a suitable power outlet. Do not power on the receiver yet.
4. Connect to Audio System: Use the balanced XLR output or the mixed auxiliary (1/4" Jack) output on the receiver's rear panel to connect to your audio mixer, amplifier, or sound system.
5. Install Batteries in Transmitters: Open the battery compartment on each bodypack transmitter and insert two AA batteries, observing the correct polarity (+/-). Close the compartment securely.
6. Connect Microphones to Transmitters: Plug your chosen headset or lavalier microphone into the microphone input jack on each bodypack transmitter.

6. Operating Instructions

1. Power On: First, turn on your audio mixer/amplifier. Then, press the power switch on the receiver unit to turn it on. Finally, slide the ON/OFF/MUTE switch on each bodypack transmitter to the 'ON' position.
2. Check Indicators: Observe the RF (Radio Frequency) indicators on the receiver's front panel. They should illuminate, indicating that the receiver is receiving a signal from the transmitters.
3. Adjust Volume: Speak into the microphones. The AF (Audio Frequency) indicators on the receiver should light up, indicating audio signal presence. Adjust the independent volume knobs for Channel A and Channel B on the receiver to achieve the desired output level.
4. Using the Mute Function: To temporarily silence a microphone without turning off the transmitter, slide the ON/OFF/MUTE switch on the bodypack transmitter to the 'MUTE' position. Slide it back to 'ON' to resume audio transmission.
5. Optimal Placement: For headset microphones, position the boom mic approximately 2-3 cm from the corner of your mouth. For lavalier microphones, clip them to your clothing about 15-20 cm below your chin.
6. Operating Range: The system has an effective operating range of up to 80 meters in open, unobstructed environments. Walls, large metal objects, and other wireless devices may reduce this range.
7. Power Off: When finished, first slide the transmitter switches to 'OFF', then turn off the receiver, and finally turn off your audio mixer/amplifier.

7. Maintenance

• Cleaning: Use a soft, dry cloth to clean the receiver and transmitters. Do not use liquid cleaners or solvents, as they may damage the finish or internal components.
• Battery Replacement: Replace batteries in the bodypack transmitters when the audio quality degrades or the transmitter indicator light (if present) signals low battery. Always use fresh AA batteries.
• Storage: When not in use for extended periods, remove batteries from the transmitters and store the system in a cool, dry place, away from direct sunlight and extreme temperatures.
• Antenna Care: Handle antennas carefully to avoid bending or breaking.

8. Troubleshooting

9. Specifications

10. Warranty and Support

Audibax products are manufactured to high-quality standards. For warranty information, technical support, or service inquiries, please refer to the contact details provided with your purchase documentation or visit the official Audibax website. Keep your proof of purchase for any warranty claims.