I had this posted under another topic in Garmin, but I think it merits being here as well so owners of all makes can try it out.
The Site below has a search feature to find the best/least used frequencies in your given zip code. It also has a link for Canada AND international searches on the far right as well. It's worth a shot to see if you can find a cleaner, less used station where you live and travel.
Happy hunting for a better FM connection.
I have a Garmin 880 and I don't use the FM transmitter at all, I find the transmitter power to be to low to be useful.
In a metro area like Pittsburgh, the FM transmitter on my 765T, and the 760 that I had borrowed prior to my purchase, were not up to the quality I want. I used the site posted above to try various stations, and while all seems fine for a mile or two, or even for stretches of 15 or 20 minutes, eventually my travels take me into an area where I pickup interference. And this is not a fault of Garmin, but rather the FCC requirement that the power be low as to not interfere with adjacent vehicles radios.
Fortunately, my CR-V has a cassette deck, and the cassette adapter works great. And I will definitely make sure my next vehicle has an AUX/line-in jack on the stereo.
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