i'm thinking of buying a sennheiser wireless kit.

which frequency is "best"? A (516-558) B (626-668) G (555-608)

is there a difference?

is one "better" than the others?

i am located in a metro urban area. does that matter as to frequency choice?

thanks in advance.

be well

rob
smalltalk productions

Strongly suggest reading this discussion:
http://www.dvinfo.net/forum/all-things-audio/500753-spectrum-analyzer-working-wireless-mics.html

With something like this inexpensive spectrum analyzer, you can make better-informed decisions
on strategic issues like selecting equipment capabilities. Furthermore, it will greatly aid in making
tactical decisions on-location about what channel(s) are free to use, and for problem resolution in
case of interference. New York and San Francisco are reputed to have the most problematic RF
spectrums in the USA. But like most large cities are nearly as bad.

Consider also that consulting local rental houses could give you first-hand anecdotal evidence of
what frequency bands customers are finding the easiest to use.

Sennheiser has a great interactive tool here: Find Available Frequencies (http://www.sennheiserusa.com/findFrequency/)

Plug in your location and it will tell you what frequencies are available and what are in use in a particular place.
There is no "best" because what is available depends on what freqs in use and the strength of their signals at any given place.

Richard's suggestion for a spectrum analyzer is on point because you can get a real-time reading where you are when you are actually using the kit, but for a purchasing decision on which band to buy, the Senny site may give you the guidance you need...

Good advice here. The only thing I'd add is if you decide to go the eBay route, be careful. There's plenty of band C stuff being sold there and sometimes you have to dig from less than scrupulous sellers to find out.

Remember also that there are counterfeit products out there for very popular items like the Sennheiser gear. The fakes look pretty good on casual inspection. There are photos on the internet showing the fake vs. the real items to help you discriminate.