audio capacitors 1800/150 uF ?

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What duty?
Did they specify for Decoupling of the supply rails, or smoothing of the PSU rectified mains, or AC coupling of an interstage, or speaker capacitor for DC blocking, or filtering of low level signal, or filtering of a high level signal (with or without bias) and some others I have missed?

Without a duty the paragraph is completely useless !

But then that is typical of Hi End advertising and this "review" is intended for that gullible audience.

Doesn't look like they specified duty? Have you read it?
 
Anyone asking about capacitors will get two kinds of answer:
1. the engineering answer (e.g. what is the cap doing, what is the correct value, what is the appropriate dielectric)
2. the audio fashion/preference answer (e.g. I tried Brand X in my totally different circuit and they were wonderful/rubbish etc.)
People offering the two different types of answer will disagree with each other, and those offering fashion answers will disagree among themselves.

We cannot turn every thread about capacitors into a detailed tutorial on basic electronics, so that is why the advice to do some reading may appear. If you lack any knowledge of physics then first you need to acquire this - but most elementary electronics books will start with this anyway. In the meantime you are probably not in a position to sift the wheat from the chaff in the advice you have been given, so the more advice you get the more confused you will become.

This is a discussion forum, not a teaching resource. Having said that, I have learnt a lot from other people on here but that involved me doing some thinking too and not simply looking for ready-made answers.

Yes, that appears to be well said, I must try to remember that this is not a teaching resource. How are you defining the apparent disparity between help and teaching? I find it hard to understand algebra because of a form of maths dyslexia, but I remain passionate about electronics, I am more of a fixer than improve'r/designer.
 
Well said.

I could add the two items are not a contradiction and round-trip between the two items is a comon way of doing things when it comes to a hobby (where the efficienty of Learning in a limeted time is not involved like school times or profesional curses for instance).

This round-trip is almost necessary as behind the engeeniring, the result is also an easthical subjective perception (although there are objectiv explanation to explain this) which itself is corralated to subjective setings in your audio chain reproduction : rooms, others electronic stuffs, quality of your DC walls, quality of the reccordings, yourself and your ears, etc, etc.

Here people are perfectly aware of this and like to argue with always overflatting subjectiv points, because this is human (me the first) and because also all are not involved the same way, with the same knowledges and experience. Said that, experience help a lot also. Discover process are not only rational, although testing is here to check a posteriori an hypothesis/theory.

The OP is waiting a perfect answer of what he think to be a perfect question.

Experienced guys try to show with patience this fact by a re formulation of the question or by self teaching via experiments which are highly guided (because they know because they try before).

It's not a philosophical curse, so the op needs round-trip to learn/understand and valid some points he had not the idea.

Said that, be aware than playing with tubes need also some prudence as the voltage can be lethal, electricity is not Lego, and even Lego can be lethal with Young children.

We have also here to still understand if the op is in the field of dialectic or if there is a wisch of tailoring his dac. In the last case, he has to understand the answers can not be as perfect than he wisch " what could be the best caps for the best sounding in MY PÄRTICULAR SETUP and it was said caps is only a little factor (althoug sometimes more than important) among others.

Sorry to rephrase and rephrase, it is of course written for the op as the diyers, even the simpliest enthusiasts like me are all aware of that again.

Now if it's only about dialectic we can play too, that's the beauty of the thing, people are gentle here and most of he time want to help you and share their hobby.... even if they disagree because (again) at the end, Nothing than you can subejectivly how taste the wine if you don't drink it !😎... and if you don't test the glass than we give to you, why continue to argue !

Seems very abstract and I am having difficulty getting my head around this post, although does seem well compiled in essence.
I understand that ''good' caps won't make a badly designed circuit any 'better' and vice-versa. I also understand that the whole chain is relevant i.e. ears, speaker, room, other components in the system, the mains supply etc.

what is "easthical subjective perception" ? 😕😕

I understand that voltage can be lethal, I always discharge caps etc.

I understand that this is not a professional school of learning, but only a general discussion forum.

what is posteriori an hypothesis/theory? I understand that not everyone has the same experience or knowledge.

I realise that there is no perfect answer and I have not posed a perfect question either as everyone will interpret it differently.

I understand that people who have tried various experiments in practical terms have that experience to share with other members as they see fit.

Yes, I probably do need a 'round trip' to validate points of which I currently have no idea.

"We have also here to still understand if the op is in the field of dialectic or if there is a wisch of tailoring his dac" ? 😕😕

I understand that the caps are only a small part of an entire circuit, and that alone will not ensure a 'better' sound. Other parts have also been changed.

Yes, I understand that you have to drink wine in order to taste it and that the glass into which the wine is poured should also be subjected to testing, although I am sceptical that testing the glass would affect the outcome of the wine tasting process? LOL!
 
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It is to test/taste the wine... but why blocking on the cap if one forgett to remove the cork is the idea : people here are giving you a glass of wine, would you think about glass philosophy or drink it ?

Do you know this chineese proverb : "when the Wise shows the barrel of wine, the disciple look at the empty glass" 😎

Or maybe it was a sentence with the moon and a finger :scratch1: ...
 
It is to test/taste the wine... but why blocking on the cap if one forgett to remove the cork is the idea : people here are giving you a glass of wine, would you think about glass philosophy or drink it ?

Do you know this chineese proverb : "when the Wise shows the barrel of wine, the disciple look at the empty glass" 😎

Or maybe it was a sentence with the moon and a finger :scratch1: ...

No I wasn't familiar with this Chinese proverb.

I would drink the wine and not think about the glass.

I understand in order to drink the wine in the bottle, you must first remove the cork. (or smash the bottle!).

Are you trying to say that I am thinking about 'caps' (the glass) whilst you are trying to paint a much broader picture of the whole circuit (the wine?).

I realise that the same cap in different circuits will produce a different outcome/result.
 
Whilst I agree that relatively ordinary (cheap) components can be used to good effect in an excellent circuit design, you appear to have overlooked the costing factor when companies design a new product with a blank canvas!

In a large production run every new (expensive) audiophile component WILL raise their costs dramatically/considerably when dealing with thousands of items in a single ('run') batch e.g.

50p (cap.) x 10,000 (units) = £5,000

£3.00 (cap.) x 10,000 (units) = £30,000

COSTING is a very important consideration when 'designing in' a healthy profit margin for the company. Depreciating 'bang for the buck' is a major factor; at what point does a company say: "enough is enough"?

It is very much the case that if customers want top quality components, "let them buy the individual basic amp etc." ...and then they can upgrade any parts themselves (@ their own expense)!

Therefore, expensive audio grade components are NOT irrelevant or superfluous, they are simply BEYOND the financial scope of a profit making company. Money and financial profit are paramount in a competitive world marketplace! They have to build DOWN to a set budget.
 
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I think that you are overlooking the engineering aspect of designing a product. Doing simulations, building prototypes and measurements to verify it is working as expected.

Your last question is a good example. To really know if something is safe, you will need to do the engeneering.
 
It is to test/taste the wine... but why blocking on the cap if one forgett to remove the cork is the idea : people here are giving you a glass of wine, would you think about glass philosophy or drink it ?

Do you know this chineese proverb : "when the Wise shows the barrel of wine, the disciple look at the empty glass" 😎

Or maybe it was a sentence with the moon and a finger :scratch1: ...

...abstract and 'parallel' observations, concepts & elaborations ?
 
thedoc735 said:
How are you defining the apparent disparity between help and teaching?
It is a fuzzy line. On a forum like this it is only usually possible to take someone a little further in knowledge in a single thread. A few years later after many threads they may have learnt quite a lot. However, it is quite common for newbies to ask questions which they don't properly understand so they cannot understand the answer; also some false answers may be given but they cannot understand why they are false, so then they think there is a debate between two schools of thought when in fact it is just knowledge vs. confusion.

I am more of a fixer than improve'r/designer.
A 'fixer' simply replaces what is faulty. If nothing is faulty then there is nothing to fix. To improve a circuit you first have to understand it better than the original designer. Simply replacing components of Brand X with Brand Y is most likely to make no difference at all; it may make things worse or better. It may introduce new faults: "I recapped it; now it doesn't work" is a plaintive cry for help we get from time to time.
 
thedoc735 said:
It is very much the case that if customers want top quality components, "let them buy the individual basic amp etc." ...and then they can upgrade any parts themselves (@ their own expense)!

Therefore, expensive audio grade components are NOT irrelevant or superfluous, they are simply BEYOND the financial scope of a profit making company. Money and financial profit are paramount in a competitive world marketplace! They have to build DOWN to a set budget.
These comments seem to be based on the false assumptions that expensive audio grade components are electrically superior to ordinary components, and that this superiority matters in audio circuits. Both assumptions are not necessarily true. The big exception is valve output transformers, where more money generally buys a better transformer.

basically, is it safe to increase the capacitance (uF) by 20%, i.e. 1000uF to 1200uF ?
Didn't I answer that question in your other thread?
 
A 'fixer' simply replaces what is faulty. If nothing is faulty then there is nothing to fix. To improve a circuit you first have to understand it better than the original designer. Simply replacing components of Brand X with Brand Y is most likely to make no difference at all; it may make things worse or better. It may introduce new faults: "I recapped it; now it doesn't work" is a plaintive cry for help we get from time to time.

Must be using values that are far too large! Thanks to ALL for telling me about voltage and capacitance changes/increases to keep me 'safe'!
 
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