Wireless Microphone System Omnitronic UHF-604 4-Channel 823–832 / 863–865 MHz

The Omnitronic UHF-604 is a 4-channel wireless microphone system that operates in the UHF frequency ranges 823–832 MHz and 863–865 MHz. Designed for multichannel audio transmission, this system supports simultaneous use of four microphones and is suitable for presentations, corporate events, small stages and locations where interference-aware wireless connectivity is required. The compact receiver and handheld or beltpack transmitters provide straightforward integration with PA systems and mixers via standard audio outputs.

Advantages

The Omnitronic UHF-604 offers reliable UHF radio transmission across two frequency ranges, allowing operation in environments with other wireless devices. With four independent channels, it enables multiple speakers or performers to use microphones at the same time without cable clutter. The system is built for practical installation and day-to-day use, offering stable audio links and straightforward connection to common audio equipment.

Suitable for

• Corporate presentations and meetings
• Small to medium-sized live events and conferences
• Small stage performances, houses of worship and community centres
• AV rental kits and mobile sound technicians

When it may not be suitable

This system is intended for venues and events where coverage and channel count for four simultaneous microphones are adequate. It may not meet requirements for very large venues, complex multi-zone deployments, or installations that demand very long-range transmission beyond typical UHF line-of-sight distances. Environments with heavy RF congestion may require site frequency coordination or professional spectrum analysis for optimal performance.

Key specifications

• Channels: 4 simultaneous channels
• Frequency ranges: UHF 823–832 MHz and 863–865 MHz
• Audio outputs: standard balanced/unbalanced outputs for integration with mixers and PA systems
• Transmitter types: handheld and/or beltpack compatible (system includes transmitters as per product configuration)
• Intended use: multichannel wireless microphone transmission for presentations, events and small stages

How to use

Install the receiver in a rack or place it on a stable surface near the mixer or amplifier, and connect its audio outputs to the input channels of your PA system or mixer. Power up the receiver and each transmitter, set each transmitter to a different channel supported by the receiver, and perform a brief soundcheck to set levels and check for interference. Position the receiver where it has clear line-of-sight to the transmitters where possible, and use the receiver’s level controls and the mixer’s gain structure to avoid clipping and ensure clean audio. For beltpack transmitters, attach an appropriate lavalier or headset microphone and secure the pack to the presenter or performer.

What to consider before purchase

• Verify local regulations and allowed frequency bands for wireless microphones in your country or region.
• Confirm that four channels are sufficient for your typical events or whether additional channels or systems are needed.
• Consider the venue size and potential RF congestion; plan for frequency coordination if other wireless systems are present.
• Check compatibility with existing mixers and PA inputs (balanced/unbalanced connection types).

Usage recommendations

Place the receiver with a clear line-of-sight to transmitters when possible, perform a pre-event frequency scan or check for interference, and always perform a soundcheck to set proper gain levels. Keep spare batteries for transmitters and consider using shielded cables for audio connections to minimise noise.