I have listened to several. It gives an eye-opening view into the kinds of design considerations which distinguish the high end from consumer electronics,
Ayre Acoustics Discusses Transformers (Video)
“Pints with Ayre” hosted by Brent Hefley discussing Transformers in Audio Equipment with Jim White from Aesthetix Audio.
36.5 minute video
https://youtu.be/W8hwGYk8g7Y
36.5 minute video
https://youtu.be/W8hwGYk8g7Y