Can you output the sound via bluetooth to a Bluetooth stereo, phone or speaker?

No, it's impossible.

Why is it impossible?  The 750i owners manual states "Your device can send audio navigation prompts to a Bluetooth enabled wireless headset."

I've gotten it to work, sort of.  It connects to my Sony car radio and to my UE Roll speaker via BT.  But on the Sony the first two syllables of the guidance are cut off, as if it takes that long to get the connection.  So I get "you on.." instead of "Continue on..." and "1/2 miles" instead of 1 & 1/2 miles".

The cause are the bluetooth profiles. Normal bluetooth speaker use a different profile than a typical headset. Garmin hasn't implemented an full bluetooth stack, but optimized for headsets with their profiles.

Stack?  As in the OSI 7-layer one?  Yikes, that takes me waaaay back.

Ok, I think I understand.  And since we have two conversations going I'll drop this one and continue on my own thread.

Thanks!