Check out what Nelson Pass wrote in the thread :Has anyone built an Aleph-X to this spec in his post numbers 55,57, and 59.
Granted I don't have the degrees that most people do that frequent this forum so take this with a grain of salt. As I have mentioned in an earlier post in the early days of this thread the simplest thing is to exercise caution as to how the system is being shut down. Unfortunately most preamps, linestages and such have problems with their supplies decaying uniformly and I would assume thus a noise is produced. Most commercially produced preamps have some type of muting circuit or relay present in the circuitry which masks the whole thing is similar to a dog chasing its own tail. What I have done in the past was to install a small cap across the power switch, install 100K resistors across the supply and use a relay across the output of the preamp to short it upon turn off. While not 100% effective it has partially worked in most situations. The only action that works 100% of the time is to simply turn off the power amp first and then power down the preamp/linestage.
Granted I don't have the degrees that most people do that frequent this forum so take this with a grain of salt. As I have mentioned in an earlier post in the early days of this thread the simplest thing is to exercise caution as to how the system is being shut down. Unfortunately most preamps, linestages and such have problems with their supplies decaying uniformly and I would assume thus a noise is produced. Most commercially produced preamps have some type of muting circuit or relay present in the circuitry which masks the whole thing is similar to a dog chasing its own tail. What I have done in the past was to install a small cap across the power switch, install 100K resistors across the supply and use a relay across the output of the preamp to short it upon turn off. While not 100% effective it has partially worked in most situations. The only action that works 100% of the time is to simply turn off the power amp first and then power down the preamp/linestage.
There is nothing wrong with using an old Thread.
It is the Forum approved method of bringing up a topic that has been discussed.
Try opening a NEW Thread and it comes back with suggestions, asking you if another existing Thread is appropriate.
We are told to use the Search facility to find information.
That commonly brings up many OLD THREADS.
We are expected to use them for new enquiries, rather than start a new Thread.
It is the Forum approved method of bringing up a topic that has been discussed.
Try opening a NEW Thread and it comes back with suggestions, asking you if another existing Thread is appropriate.
We are told to use the Search facility to find information.
That commonly brings up many OLD THREADS.
We are expected to use them for new enquiries, rather than start a new Thread.
Some revived threads pick up the original topic. That is fine.
Others seem to have only a vague connection to the original thread: an old thread discussing a particular PSU problem may be revived by someone with a different problem with a completely different PSU. That should be a new thread.
So we are expected to revive old threads where this is relevant, or even find our answer in an old thread so there is no need to say anything at all.
Others seem to have only a vague connection to the original thread: an old thread discussing a particular PSU problem may be revived by someone with a different problem with a completely different PSU. That should be a new thread.
So we are expected to revive old threads where this is relevant, or even find our answer in an old thread so there is no need to say anything at all.
As Enzo often notices, a thump is just an Audio signal, which worst case will reach either rail for a fraction of a secon/d, and as such not different from any other audio signal the amplifier is rated and expected to handle.
Or as a practical example: if the amp doesn't die or get damaged by a loud kick drum kick, (and it shouldn't) , then why would a thump damage it?
Even more, you can have *one* thump at turn on, *one* at turn off at most, while you can listen to drum solos or mi,itary music with cannon shots included for hours.
As an example, play the "Battle of Midway" DVD
justly famous for its rumbling Navy cannon shots and bomb/torpedo explosions. https://en.wikipedia.org/wiki/Midway_(film)
Or as a practical example: if the amp doesn't die or get damaged by a loud kick drum kick, (and it shouldn't) , then why would a thump damage it?
Even more, you can have *one* thump at turn on, *one* at turn off at most, while you can listen to drum solos or mi,itary music with cannon shots included for hours.
As an example, play the "Battle of Midway" DVD
justly famous for its rumbling Navy cannon shots and bomb/torpedo explosions. https://en.wikipedia.org/wiki/Midway_(film)- Status
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