1. Introduction
This manual provides detailed instructions for the setup, operation, and maintenance of your D Debra Audio AU800 Pro UHF 8 Channel Wireless Microphone System. This system is designed for various applications including karaoke, church events, parties, conferences, and classrooms, offering reliable wireless audio transmission.
System Overview

Image: The D Debra Audio AU800 Pro system featuring the receiver, handheld microphones, and bodypack transmitters with headset and lavalier microphones, shown in a performance setting.
The AU800 Pro utilizes UHF frequency technology for stable signal transmission and wide range of use, minimizing interference from other electronic devices. Its robust metal construction ensures durability and high sound reproduction quality.
2. Package Contents
Please verify that all items listed below are included in your package:
- Wireless Receiver (1 unit)
- Handheld Microphones (4 units)
- Bodypack Transmitters (4 units)
- Headset Microphones (4 units)
- Lavalier Microphones (4 units)
- Antennas (4 units)
- Audio Cable (1 unit)
- Power Supply (1 unit)
- Angle Code (2 units)
- Screws (4 units)
- User Manual (1 unit)

Image: A visual representation of the D Debra Audio AU800 Pro package contents, including the receiver, handheld microphones, bodypacks, headset and lavalier microphones, antennas, cables, and power supply.
3. Product Overview
3.1. Wireless Receiver
The central unit of the system, featuring 8 channels for UHF transmission. It includes individual volume controls for each channel, signal indicators, and various output options.

Image: Detailed view of the AU800 Pro receiver, highlighting the front panel with power switch, volume controls, and signal indicators, and the rear panel with antenna interfaces, XLR outputs, and mixed output.
- Antenna Interface: Connect the included antennas for optimal signal reception.
- XLR Output: Balanced outputs for connecting to professional audio equipment.
- MIX Output: Unbalanced mixed output for general connections.
- DC 12V Power Input: Connect the provided power adapter here.
3.2. Handheld Wireless Microphones
Ergonomically designed for comfortable use, these microphones feature a robust build and clear sound capture. Each handheld microphone operates on a dedicated channel.

Image: A handheld wireless microphone showing its power/mute switch and minimalist design.
3.3. Bodypack Transmitters
Compact and lightweight, these bodypacks are used with lavalier or headset microphones. They feature an antenna for signal transmission and a secure clip for attachment.

Image: Front and back views of a bodypack transmitter, showing the antenna, power switch, and volume controls.
3.4. Headset and Lavalier Microphones
These vocal condenser microphones are ideal for hands-free operation, suitable for presentations, teaching, and performances. They connect to the bodypack transmitters.

Image: A headset microphone and a lavalier microphone, both designed for vocal clarity and hands-free use, shown connected to a bodypack transmitter.
4. Setup Instructions
- Unpack the System: Carefully remove all components from the packaging.
- Connect Antennas to Receiver: Screw the four antennas into their respective ports on the rear of the wireless receiver.
- Power the Receiver: Connect the provided power adapter to the DC 12V input on the receiver and plug it into a power outlet.
- Connect Receiver to Audio System:
- For individual channel control, use XLR cables (not included) to connect the balanced XLR outputs (A, B, C, D) on the receiver to your mixer or amplifier.
- For a mixed output, use the provided audio cable to connect the MIX output on the receiver to your audio system's input.
- Install Batteries in Microphones/Bodypacks:
- Handheld Microphones: Unscrew the bottom part of the microphone and insert 2x AA batteries (included), ensuring correct polarity.
- Bodypack Transmitters: Open the battery compartment and insert 2x AA batteries (included), ensuring correct polarity.

Image: Illustration showing how to insert AA batteries into both a handheld microphone and a bodypack transmitter.
- Connect Headset/Lavalier Mics to Bodypacks: Plug the mini XLR connector of the headset or lavalier microphone into the input port on the bodypack transmitter.
5. Operating Instructions
- Power On the Receiver: Press the power button on the front panel of the receiver. The power indicator will illuminate.
- Power On Microphones/Bodypacks: Turn on each handheld microphone or bodypack transmitter. The system will automatically pair the microphones with the receiver. The signal indicator on the receiver for the corresponding channel will light up.
- Adjust Volume: Use the individual volume control knobs on the receiver's front panel to adjust the output level for each microphone channel.
- Using Microphones:
- Handheld Microphones: Hold the microphone approximately 2-6 inches from your mouth for optimal sound. Use the slide switch for ON/MUTE/OFF functions.
- Bodypack Transmitters with Headset/Lavalier Mics: Clip the bodypack to your belt or clothing. Position the headset microphone comfortably or clip the lavalier microphone to your collar, ensuring it is close to your mouth. Adjust the volume on the bodypack if available.
- Power Off: After use, turn off all microphones and bodypacks first, then power off the receiver. This helps prevent unexpected noise and prolongs battery life.
6. Maintenance
- Cleaning: Use a soft, dry cloth to clean the receiver and microphones. Avoid using liquid cleaners or solvents.
- Battery Replacement: Replace AA batteries in handheld microphones and bodypacks when the low battery indicator appears or when performance degrades. Always use fresh batteries of the same type.
- Storage: When not in use for extended periods, remove batteries from all wireless units 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. Ensure they are securely attached to the receiver during operation.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound output | Microphone/bodypack off; low battery; receiver off; incorrect cable connection; receiver volume too low. | Ensure all units are powered on; replace batteries; check all cable connections; increase receiver volume. |
| Intermittent sound or static | Weak signal; interference; low battery. | Ensure line of sight between transmitter and receiver; move closer to receiver; check for sources of interference; replace batteries. |
| Microphone not pairing | Microphone/bodypack not powered on correctly. | Ensure microphone/bodypack is powered on and within range of the receiver. The system should auto-pair. |
| Poor sound quality | Microphone too far from mouth; incorrect volume settings. | Adjust microphone position; fine-tune volume levels on both the microphone/bodypack and receiver. |
8. Specifications
- Material: Metal
- Signal-to-Noise Ratio: 80 dB
- Number of Channels: 8
- Frequency Response: 16000 Hz
- Item Weight: 8.48 pounds
- Package Dimensions: 21.25 x 11.75 x 5.38 inches
- Batteries: AAA batteries required (for some components, though AA are mentioned for mics/bodypacks in feature bullets, please verify with product for exact battery type for each component).
- Connectivity Technology: XLR
- Connector Type: XLR
- Special Feature: Volume Control
- Compatible Devices: Speaker

Image: Visual representation of the system's dimensions and battery usage for the microphones and bodypacks.
9. Warranty and Support
For warranty information or technical support, please refer to the contact details provided with your product packaging or visit the official D Debra Audio website. Keep your purchase receipt for warranty claims.