I am looking at purchasing a wireless mic, like the Sennheiser Evolution G2 100 series, and was wondering how to best choose from the three RF Carrier Frequency Ranges that Sennheiser offers. A: 518 - 554MHz, B: 626 - 662MHz, C: 740 - 776MHz
Frequencies allowed and the RF power through which they may be transmitted, are regulated by each country. Therefore, you'll choose your frequencies depending on the country you intend to use them in and on what RF power you'll be needing.