Debra Audio AU400 4-Channel UHF Microphone System – 4 Handheld Mics

Give Four Performers Their Own Wireless Microphone at Once

The AU400 combines four fixed UHF channels, four handheld microphones and a metal receiver for panels, karaoke groups, classrooms and hosted events.

Why It Helps

• Four receiver channels let four handheld microphones operate simultaneously.
• Dedicated hardware reduces the need to pass one microphone around a group.
• Metal receiver is designed for fixed event and PA setups.
• Squelch circuitry helps suppress output when a usable transmitter signal is absent.
• Supplier-stated long open-space range supports larger rooms when conditions allow.

Product Details

• Model: Debra Audio AU400.
• Includes one wireless receiver and four handheld microphones.
• This live variant is specifically the four-handheld “A frequency” set; lavalier and headset microphones are not included.
• A-frequency points listed as 501, 511.5, 524 and 538.5 MHz.
• Supplier-stated line-of-sight range: up to approximately 300 ft (91 m).
• Exact output connections, power accessories, microphone battery type and full package contents are not verified in the extracted source.

Quick Setup

• Before purchase or use, confirm all four fixed frequencies are lawful and suitable in Australia at your location.
• Connect the receiver to a compatible mixer or PA with appropriate cabling and start with all channel volumes low.
• Fit suitable batteries, power on microphones one at a time and test every channel before the event.

Care & Safety

The old claim that these frequencies can be used worldwide is incorrect. Wireless spectrum rules are country- and location-specific; confirm current ACMA rules, especially for fixed 501–538.5 MHz channels. Do not use if local services occupy them. Open-space range is not guaranteed indoors. Keep receiver and power equipment dry.

Frequently Asked Questions

Which microphone configuration is included?

Four handheld microphones. No headset or lavalier transmitters are included in this variant.

Can it be used anywhere in Australia?

Not automatically. The fixed frequencies must be checked against current ACMA rules and local interference.

How far does it reach?

The supplier states up to about 300 ft line-of-sight; indoor range will usually be lower.