|Good stuff P2V. I remember Sansui. Not sure if they went out of business or were acquired, but they had some good equipment back in the day. |
I think it was Sansui who once sold a high power audio receiver (integrated tuner, amp, preamp) that had a small built-in oscilloscope display where you could see a real-time view of the left vs right audio channels. That was pretty innovative, but never really caught on as a feature. I think it was around the late 70's or early 80's.
Edit to add: thanks to Google I found what I was remembering, and it was Marantz not Sansui: