Who told you this? AFAIK there is no such thing.
6 responses Add your response
Kijanki - I was actually informed about this effect by an audio designer with over 30 years of experience.
Having had a formal education in electrical engineering, I can understand how this effect may occur, simply because there are many electrical components that rely on EM saturation in order to operate e.g. transformers and inductors are the most common.
But many other components can exhibit traits similar to these components when subject to very high frequencies, which effectively alters their overall impedance.
In fact, I read a few articles on the web specific to digital circuit design that highlights these problems before placing my OP.
The effect is most noticeable when extremely high frequencies are in play, such as with digital music reproduction.
As stated in my OP, it was most noticeable with my digital components and hardly at all with my "analogue only" amp.
Perhaps one of our more learned Audiogon brethren can provide mode details?
What I do know - what I heard :-)
Williwonka, Saturation in magnetics occur when increasing magnetic field cannot increase magnetization anymore (magnetic flux limit). In 99% of cases magnetics are designed to stay below saturation levels. In addition saturation might depend on temperature but it is not a function of time.
Overall impedance of circuits is not "altered" by high frequencies. Their impedance is different at different frequencies, but again - it isn't function of time.
I don't question your experience but rather suggest that reason can be different including temperature or changes in ambient electrical noise.
Kijanki - I have neither the educational background or the desire to delve into the "root cause" and your thoughts on this topic may well be correct.
I was simply passing on what I had heard and since it came form a "credible source" and I found it to be beneficial, I thought other members might like to be aware of yet another intriguing facet of this insane hobby.
Lustformusic - The amp did not reveal any benefits that I can tell, but it is designed to be left powered on - a well known NAIM trait, so I figure the design combats this phenomena somehow.
I still have to test my analogue phono stage, which may or may not benefit from "rebooting"
I'll keep you posted :-)
So I allowed the phono stage to remain powered on for around 10 days - the Digital components only took 6 days to saturate, so I figured give it a little extra.
I played 3-4 select tracks that I frequently listened to 2-3 times each to become familiar with the sound.
I then powered down the phono stage only and allowed it to completely drain for about 2 hours
I then powered up the phono stage and allowed 30-40 minutes for the electronics to warm up and power supply to stabilize.
On replay of the same tracks there was a discernible improvement in the high-en extension and the details and crispness of the upper frequencies could easily be heard.
Although the improvements in the phono stage were not quite to the same degree as those I had observed with the digital components, they were still very noticeable.
When I look at my observations pertaining to each component it is quite apparent significant improvements can be attributed to powering them down.
So that's what I will be doing going forward