The title of the website does not describe the members found within as a whole. I will gladly take opinions from people that have had very successful ventures in the audio world, and the people who design electronics for much more complicated things that you (or I) have.
Which means nothing, as
1. a thevenin equivalent circuit, Kirchoff, Norton etc, 1st semester basic electronics has proven they do not understand basic electronics in an analog application.
2. Successful means what? A large company with a huge marketing strategy. Cosmetics sells more than solid designs.
I think it is interesting to note that Martin DeWulf, a criminal defense attorney and music lover, investigated and wrote an article titled "Truth be Told" which discussed how shills and certain groups work on forums.
3. You accept their opinions, but Thevenin equavilent circuits, Kirchoff, Norton, etc. are not opinions, but fact.
4. So how do you know if they are marketing or providing real science.
You don't. Afraid you have been suckered my friend.
The website has contributors from everywhere. Many members don't even declare whom they work for. There are loads of ex Harmon employees, physicists, employees at loads of other commercial audio companies, etc etc etc.
At least you admit there are shills, conflicts of interest, employees on the diy forums. We have found such as well on Stereophile forums, AK forums etc. One company, a room acoustics company, demands their employees post and push agendas, to sell more room acoustic treatments since their jobs depend upon sales.
This is like the preamp thread at audiocircle where you claim your buffer driving an amplifier will provide zero sonic benefits over the source poorly driving the amplifier.
Not a coherent statement. I also never manufactured, nor possessed a buffer of any kind over the decades.
Let me see if I can explain it really plainly... if the impedance of the power supply had to be equal across the audio band to produce the audio band, it would be no different than saying the power supply must provide a matching frequency to the signal that is being amplified. It should not be hard to see how that cannot be true, has never been, and never will be.
A non-coherent, non-scientific statement? An understanding of a Thevenin Equivalent Circuit, Kirchoff, Norton, etc, explains how the power supply affects the sonics.
It can easily be proven that musical signal current "flows" through the power supply "filter" capacitor of an analog stage.
I am afraid the diy leaders have played you for a suckered folsom.
In the bottom diagram, musical signal current flows through both the series 0,47uf coupling capacitor and RG to ground, and through series RL and power supply capacitor C1 to ground. In the diagram, the plate of the tube is the musical AC signal source, reference is ground with an oscilloscope S. Capacitive reactance is calculated as Xc = 1/ 2pi x F x C.
At mid band Xc is like a resistor. Musical current flow is the AC rms voltage divided by Xc1 + RL (5k).
Musical current through the coupling capacitor is AC rms voltage divided by Coupling capacitor Xc + Rg (100k).
Usually, RL,C1 has many times more musical signal current than through 0,47uf coupling cap and Rg. As such, the power supply filtering system will affect the sonics more.
I think you are killing the reputation of the diy community by pushing their snake oil. As I have mentioned before, this is
first semester electrical or electronics engineering, not even second year.
I would be very wary of anything the diyers preach folsom.
cheers
steve