Understanding Wireless Frequencies and Interference
Every wireless mic transmits on a radio frequency. To work reliably, each channel needs its own frequency that doesn't clash with your other mics or with local TV stations and other signals.
Why we ask for your ZIP code
Available frequencies depend on where you are. We use your ship-to ZIP code to choose frequencies that are legal and usable in your area, which is why our quote form asks for it.
Legal frequency bands
Wireless microphones in the U.S. must operate in bands permitted by the FCC. Older systems built for the former 600 MHz band (roughly 617–652 and 663–698 MHz) can no longer be legally operated in the U.S. If you have an older system, check the frequency range on its label. Wireless systems sold by Stage Gear are offered in bands we sell for U.S. use.
Coordinating channels
- All channels used in the same room must be coordinated together, even across different brands or systems.
- Most modern receivers have a scan function that finds open frequencies, and many can "sync" a frequency to the transmitter by infrared. Your system's manual explains how.
- Adding channels later works as long as the new ones are coordinated with what you already own. Show-Ready racks are coordinated for you.
- Rented systems from another source, or a visiting band's wireless, also need coordinating with yours.
Common causes of interference
- Two transmitters set to the same or very close frequencies
- A transmitter left on in a dressing room or bag
- LED walls, video equipment, Wi-Fi routers or other RF sources placed right next to receivers or antennas
- Local TV broadcasts in your band
Hearing dropouts or noise? See Wireless audio dropouts or cutting out.
Still need help?
Tell us your system's brand, model and frequency range (printed on the receiver) and your ZIP code. Call us at 718-874-2642 or email hello@shopstagegear.com. You will reach people who work in theatre. See How to contact Stage Gear support for what to include so we can help faster.