Great to hear. Now we've established that the speaker is indeed powerful.
So now all we have left is the microphone. How does it work for the lady on the other end of the phone? Do you ever get complaints that people can't hear you, or tell you to speak louder?
These would be the typical indications of the microphone not being suited to longer distances, between the user and the phone. But this might not be the case, or is it?