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A great performance depends on freedom of movement. Few performers want to sing, dance or play a solo while “tied to a cable”—especially on a large stage. To transmit audio wirelessly, you need a wireless system or radio link. Below is an overview of the most common system types and what really matters when choosing the right solution.
Wireless handheld microphones are used far beyond major touring stages. For presentations, interviews, private events or live hosting they avoid cable clutter—especially when the mic is passed around the audience. Like other RF systems, a handheld system consists of a transmitter and receiver that send audio wirelessly.
Important factors include stable RF performance, correct frequency selection and a reliable battery indicator to prevent unexpected dropouts. Modern systems can scan license-free bands for the cleanest channels. When not in use, switch off the transmitter to extend battery life. Multiple receivers are often mounted in a 19" rack, with mixing-desk connections typically placed on the rear panel.
Compact handheld set for speech and vocals: AKG WMS 40 Mini Vocal / ISM 1.
License-free and licensed frequencies in Germany
In Germany, regulations define which frequency bands are license-free or require registration. Older systems (pre-2016) may operate in bands now reserved for LTE/DVB-T services. License-free bands typically carry a higher risk of interference than coordinated frequencies. Registration with the Bundesnetzagentur includes a fee and annual cost per transmitter.
With headset systems, a bodypack transmitter connects to a small microphone worn on a headband. Ensure the headset fits comfortably for long sessions. The bodypack can be clipped to a belt or placed in a pocket.
Headset systems offer maximum mobility—ideal for fitness instruction, education, theater and musical productions.
Wireless headset system for complete freedom of movement: AKG WMS 40 Mini Earmic Set.
Lavalier systems (clip-on microphones) are ideal when speech clarity is the focus and handheld or headset microphones would be visually distracting. A bodypack transmitter connects directly to the lavalier mic.
Lavalier microphones are widely used in broadcast, presentations and theater thanks to their discreet appearance and minimal movement restriction.
For presentations and hosting: AKG PW 45 Presenter Set.
Instrumentalists also benefit from wireless freedom. Instrument systems can emulate the feel of a standard instrument cable or provide receivers that integrate into pedalboards—sometimes with built-in tuners. Compact plug-on transmitters are also available for instruments with a jack socket.
In-ear monitoring
Wireless links are also used for in-ear monitoring—but in reverse. The signal travels from the mixing desk to a bodypack receiver worn by the performer. Many musicians carry both a transmitter (for their mic or instrument) and a receiver (for in-ear) simultaneously.
The key consideration—besides form factor—is the frequency range used by the system. Entry-level users often choose license-free bands, while professional touring acts depend on coordinated, licensed frequencies when operating many channels. For international work, always check local regulations.
Further essentials include operating range (up to roughly 100 meters, depending on the system) and battery performance. Both run time and charging time matter so all transmitters are ready before the show starts.
A frequency band is a defined portion of the radio spectrum. Bands may be license-free, shared or licensed, depending on national regulations.
In the USA, wireless audio is regulated by the FCC. Available spectrum includes license-free bands, shared environments and licensed ranges for professional productions. Exact availability must be checked against current FCC rules.
Smaller setups often rely on license-free operation, while larger productions typically use licensed spectrum and coordinated planning.
Yes. Some spectrum ranges are reserved for mobile networks, public safety or other services. The usable spectrum evolves as FCC reallocation occurs. Always check current FCC information before purchasing or deploying equipment.
VHF provides solid range and building penetration but fewer usable channels.
UHF supports higher channel counts and is preferred for professional shows, festivals and broadcast environments.
The USA offers several license-free options for simple wireless applications like presentations or rehearsal spaces. For larger multichannel systems, licensed operation under FCC rules is usually more reliable.
Licensed spectrum is recommended when high reliability or numerous simultaneous channels are required—such as in theaters, houses of worship, festivals and broadcast facilities.
Consider RF noise, building structure, nearby Wi-Fi or 5G activity, antenna placement and whether the system includes robust scanning and synchronization tools.
The number depends on bandwidth, spacing and local RF conditions. Professionally coordinated UHF systems support far more channels than entry-level products.
Most live setups rely on XLR and 1/4" jack outputs. Helpful extras include mic/line switching, solid rackmounting and clear RF/AF indicators.
Reliable run time and accurate status indication help avoid mid-show dropouts. Charging time is equally important to ensure all transmitters are ready before doors open. For long events, spare rechargeable packs and a rotation plan are highly recommended.
