aural memory
Exactly.Quoteaural memory
that's really all you need to know about this article.
While some caps had their outer foil clearly marked (VCap, Hovland, and so on), the RelCaps (among others) were sometimes a problem. When we bought RelCaps from Michael Percy Audio, the outer foil was already marked by MPA. Otherwise, we used an oscilloscope to locate it ourselves. To do this, we attached the hot and ground wires of the scope's probe to each lead of a given cap and placed the cap perpendicular to an active AC line, such as the power cord of the scope, itself. We observed the noise pattern on the scope, reversed the leads, and determined that the correct orientation was the one in which the scope's pattern display was the shortest in height. That is to say, when the display was the shortest, the scope's probe ground connection was considered to be connected to the outer foil of the cap.:palm:
QuoteWhile some caps had their outer foil clearly marked (VCap, Hovland, and so on), the RelCaps (among others) were sometimes a problem. When we bought RelCaps from Michael Percy Audio, the outer foil was already marked by MPA. Otherwise, we used an oscilloscope to locate it ourselves. To do this, we attached the hot and ground wires of the scope's probe to each lead of a given cap and placed the cap perpendicular to an active AC line, such as the power cord of the scope, itself. We observed the noise pattern on the scope, reversed the leads, and determined that the correct orientation was the one in which the scope's pattern display was the shortest in height. That is to say, when the display was the shortest, the scope's probe ground connection was considered to be connected to the outer foil of the cap.:palm:
these were not "blind" tests
the panel was [em]generally[/em] unaware of which cap they were listening to
hose with the lowest expectations were installed first followed by those for which the expectations were the highest,
With capacitors being one of the largest variables, we needed a method to show how they performed in different circuits under "real world" listening conditions. Of course, despite our attempt at objective evaluation, in reality, these opinions are highly subjective and based solely on our own listening tests in our own projects.
QuoteWhile some caps had their outer foil clearly marked (VCap, Hovland, and so on), the RelCaps (among others) were sometimes a problem. When we bought RelCaps from Michael Percy Audio, the outer foil was already marked by MPA. Otherwise, we used an oscilloscope to locate it ourselves. To do this, we attached the hot and ground wires of the scope's probe to each lead of a given cap and placed the cap perpendicular to an active AC line, such as the power cord of the scope, itself. We observed the noise pattern on the scope, reversed the leads, and determined that the correct orientation was the one in which the scope's pattern display was the shortest in height. That is to say, when the display was the shortest, the scope's probe ground connection was considered to be connected to the outer foil of the cap.:palm:
It's not like it would have been hard for them to do it properly, put up a screen between test subject and test setup. Properly randomise the tests. Play the same music pieces for each test. And throw in a control of some bog standard cap. That's it. Nothing more complicated needed.And if you want to do the testing a little bit easier, connect up all the caps to random positions on a rotary switch. Ask the listener to turn the knob to the position that sounds best. Move caps to different positions on the switch, then repeat.
I need to start my own cap business...That would be an overkill. Just pay some taiwan company for custom labels like:
Granted, I'm just gonna stick the cheapest caps I can find in Shenzhen electronics mart into a fancy looking wooden box, and then print off a crap cal certificate. Total cost to me? $20 at most. Sell it for $400.I need to start my own cap business...That would be an overkill. Just pay some taiwan company for custom labels like:
"Omega One
Wolfram Teflon Triaxial
0.000001% THD 350V 125C"
Granted, I'm just gonna stick the cheapest caps I can find in Shenzhen electronics mart into a fancy looking wooden box, and then print off a crap cal certificate. Total cost to me? $20 at most. Sell it for $400.I need to start my own cap business...That would be an overkill. Just pay some taiwan company for custom labels like:
"Omega One
Wolfram Teflon Triaxial
0.000001% THD 350V 125C"
I'm waiting for an amp that has homeopathic levels of distortion.
I'm waiting for an amp that has homeopathic levels of distortion.
Nah, wouldn't work. Audiofools disregard quantifiable measurements like THD and instead rely on their 'golden ears'.I need to start my own cap business...That would be an overkill. Just pay some taiwan company for custom labels like:
"Omega One
Wolfram Teflon Triaxial
0.000001% THD 350V 125C"
I'm waiting for an amp that has homeopathic levels of distortion.Putting more amps in series to decrease THD? :-DD
Sadly that actually works. On opamp level.I'm waiting for an amp that has homeopathic levels of distortion.Putting more amps in series to decrease THD? :-DD
I'm waiting for an amp that has homeopathic levels of distortion.
Dave, ever consider to make a drive/walk through rant video dedicated on this audiophool matter ? >:D
Hopefully it won't increase your daily death threads list. :-DD