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Old 11th August 2012, 09:42 AM   #521
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Originally Posted by MagicBox View Post
You need to learn that what a circuit does is not always what a circuit wants to do. We're not talking audio signal transients. We're talking regulatory frequency transients caused by non-lineairities in devices. When all is good, the regulatory frequency is very high with minimal swing. When things are not so good you have an amp that's outright unstable and if it's on the edge, it'll be very tacky to listen to.

In the ideal situation there is no regulatory swing, it'll be Vpp=0. BUT as soon as a delta appears in the system, the regulatory swing will be back to adapt to the change in the system. The quicker and faster it can do that, the better the amp is.
You recalling TIM. TIM can occur sometimes but good design amp hasnt it. For a large part TIM is also a hoax. It can occur in not well designd amps but only at such fast and high amplitude transients what never happens in real music.
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Old 11th August 2012, 09:50 AM   #522
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Reading comprehension. We're not talking about the speaker terminal output. We're talking the collector/drain connection points of the output devices. The cap multi is a tool used locally close to the output device power terminals. It's called a "cap multiplier" for a reason. It prevents local sag with a much smaller cap, tapping into the stored current in the PSU buffer caps, though with the nastly L parasitic in between before it gets to your board. The CM transistor actually compensates for the T=0 current draw associated voltage sag.
If there high frequency regulatory frequencies, whatever it is, what has it to do with the assumed need of high cap? High frequency needs low cap with low parasitic inductance, thats why well design amp has a polypropiline cap paralel to the rectivier Elco.
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Old 11th August 2012, 10:08 AM   #523
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Wrong. When there is current demand from the amp, without CM, it will draw current from the big rectifier cap. With CM the amp can only draw current from the smaller C at the CM output. The supply will even drop more then without CM.
I never said the crrent did not come from the big rectifier cap. If you refuse to understand and read what people are saying I see no use discussing with you.
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Old 11th August 2012, 10:20 AM   #524
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Your amps must be completely free from any higher order but the fundamental harmonics if you think your transients are limited to the fundamental audio band.
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Old 11th August 2012, 10:20 AM   #525
dadod is offline dadod  Croatia
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Quote:
Originally Posted by MagicBox View Post
I never said the crrent did not come from the big rectifier cap. If you refuse to understand and read what people are saying I see no use discussing with you.
Exactly, no point to try to explain
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Old 11th August 2012, 10:33 AM   #526
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I never said the crrent did not come from the big rectifier cap. If you refuse to understand and read what people are saying I see no use discussing with you.
Thats the typical way to avoid recoqnition of the own fault when it becomes tricky.
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Old 11th August 2012, 10:34 AM   #527
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The typical response of someone that was deemed not worth the effort.
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Old 11th August 2012, 10:51 AM   #528
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The typical response of someone that was deemed not worth the effort.
What is the answer? Its damm tricky hah to get difficult critism from a low level trilingual newbie!? Dan maar afkappen met de goedkope Nederlandse manier. Hihihi...
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Old 11th August 2012, 11:03 AM   #529
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Exactly, no point to try to explain
Cause there is no explanation, the circuit is useless and even degrading amp performance. Have someone ever seen such a circuit in the power supply of a profesional power amp? No. Does it means that you all are better then those profesionals?
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Old 11th August 2012, 11:14 AM   #530
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Your amps must be completely free from any higher order but the fundamental harmonics if you think your transients are limited to the fundamental audio band.
Of course there are harmonics higher then the audio band but there is no need to reproduce that. What do you think is the bandwidth of your source? All are filtered at around 15 to 20 kHz.
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