A new one just today.
The serviceman came to replace the COX cable box. (He does all the field work, including stringing cable and was far more knowledgable about the cable boxes than the other techs who came out.) Looking at the equipment and speakers, and us connecting the projector component inputs to the new cable box..., together (you don't want to drop those cables behind the cabinet

), he said that he was interested in getting into audio.
I pointed at the Mermans and said, That's a JBL 18" woofer.
He pointed at the L300s and asked "That one?"
I said, "No, that's 15" woofer, a horn, and a slot tweeter.
I pointed at the Mermans and said, "That's an 18", a 10", and a Heil Air Motion Transformer."
"What's that?" was his reply, referring to the Heil. (As I've said, this is not a knew question for me.)
"A tweeter" I said.
"What's that?" was his comeback
actually asking what a tweeter was.
"A speaker" I replied.
"Oh, that I understand" he said.
Nice guy too.