Frankly,
@Rzezniq, a few of us have invested a fair amount of time, effort, keystrokes
and forum bandwidth in explaning why nonsense is nonsense -- not a good use of any form of resource, human or silicon.
Leave that "paper" (or whatever it is) behind and read some classic literature on audio reproduction then work your way back towards modernity (or not, as you wish). The "best" practicioners of the art will understand
all of it well enough 1) to make intelligent and rational choices and 2) to explain them rationally, accurately,
and clearly to an audience at any level of technical proficiency. (EDIT: The audience
does have to be
interested, though!)
As I like to tell my students when I teach 'em "old stuff" so that they have some insight into "new stuff" -- Picasso
had to learn to "do" art (e.g., painting) "the right way" before he could detonate the whole field!
View attachment 104908
Indeed.
This is very fundamental and has about as much to do with the differences in (typical) vacuum tube vs. solid state audio amplification as anything.
Just to be really clear -- I think I understand this stuff
reasonably well for someone whose interest in the subject is purely recreational. That said, I choose to do most of my listening
via archaic amplification technology using single-ended (class "A") triode power amplification, transformer-coupled*, with no global (nor any externally applied local) negative feedback. The damping factor of the amp I use is about 8 (i.e., 1 ohm output impedance) and the power output is about 3.5 watts (per channel) at clipping. Is it
hifi? Well, perhaps not, and it may be that what I like about it is euphonic distortion. But I
like it, and I
choose to listen to it.
DSC_0124 by
Mark Hardy, on Flickr
(and it looks nice in the dark
)
___________
* and the requirements of single-ended vs. push-pull output transformers is
another issue entirely! Suffice it to say that, in "normal" single-ended (SE) amplifier designs, the OPT has to deal with the DC plate voltage applied to the amplifier tube; thus the SE transformers have an "air gap" and have to be very large & heavy to avoid saturation by the DC voltage. These are weeds not worth getting into in this particular discussion, but it's of profound importance if one wants to build a decent single-ended vacuum tube power amplifier.