I made it down to -21db the first time. The second time was "worse."

I was using 'quality' headphones, at a moderate volume (i.e. I didn't cringe).

Very good, informative post, for sure.

Thank you silas!

Cheers,
Nert
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Nert's Home Theater---
Mostly electrically driven box-shaped things (with dials and buttons) connected by wires and cables of various colors, diameters and lengths.