Safe frequencies for wireless microphones in Sweden - a complete guide for 2025
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Description
As more wireless devices use radio frequencies, competition for the 'air' has intensified. For those using wireless microphones, it is therefore important to know which frequencies are approved in Sweden and how to avoid problems.
1. What is meant by "safe frequencies"?
Safe frequencies mean frequency ranges that:
Are legal to use for wireless microphones
Are relatively protected from interference from e.g. mobile networks, TV and other radio
Offer stable performance even with many simultaneous users
2. permitted frequency bands in Sweden (2025)
| Frequency bands | License requirements | Commentary |
|---|---|---|
| 470-694 MHz | Requires a license | Stable, widely used in broadcast and events |
| 823-832 MHz | License free | Good option, especially for smaller systems |
| 863-865 MHz | License free | Short range, sensitive to interference |
| 1,785-1,800 MHz | Requires a license | Rarely used |
| DECT (1,880-1,900 MHz) | License-free | Digital technology and cheaper systems, e.g. Shure GLX-D+, often poorer sound quality |
| 2.4GHz | License free | Digital technology and cheaper systems, e.g. Sennheiser AVX, long latency and short range |
Tip: Keep in mind that some transmitters can be programmed to multiple bands - choose a system with flexible frequency management.
3. Why Narrowband is a smart investment
Systems that use narrowband technology (such as Lectrosonics or Sound Devices A20 series) use much narrower bandwidth per channel. Advantages:
More simultaneous channels within the same spectrum
Less risk of intermodulation
Better spectrum efficiency for large arrays
4. how to avoid interference
Scan frequencies before use: choose systems with automatic scanning
Use antenna systems correctly: incorrectly placed antennas can cause dropouts
Avoid transmitting on the same frequency as the TV masts in the area
Product recommendations
Product recommendations
Mid-range: Sennheiser EW-D
A digital UHF system with automatic frequency management and great flexibility.
Read more about EW-D here
Premium: Sound Devices A20-TX + A20-Nexus Go
Exceptionally robust and easy to handle - ideal for complex installations and broadcast.
Read more about Sound Devices wireless here
Bottom line
Understanding and using the right frequency bands is crucial for a stable wireless audio environment. Whether you're working in theater, conference, or worship, choose the right system and frequency strategy from the start to avoid outages and legal issues.