@atmasphere Hi Ralph, You are correct, I don't necessarily use engineering terms, but that may be because I am not an engineer.
I have posted in the past that As much as I do know and practice about speakers, I've spent my adult life working on, building, modifying and designing speakers, I found that I was only touching the surface with amplifiers. I was out of place in some more technical conversations... So I decided to learn. 6 or 7 years ago, I started buying bad amplifiers, repairing and rebuilding and in general just learning about amplifiers. I have repaired or rebuilt maybe a dozen old classics and today am fairly competent doing most repairs or modifications on amplifiers. Compared to those builds, my class D quest has been fairly simple. I have been purchasing class D modules and doing changes. With these modules, I built with linear supplies and switching supplies, both when hefty enough supplies were used would produce quite good results.... I started mostly just upgrading parts on these boards to very high quality parts. I have done very few circuit mods, but I have done a couple. Many of these amps do a good job.