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Capitance - value of uF and its relation with SQ

post #1 of 15
2/24/10 at 2:27pm
Thread Starter 
Hi i'm wondering is there something with the capitance to sound quality?
Like tighten bass etc?

Or is it more brand specific?
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post #2 of 15
2/24/10 at 2:54pm
its type of use specific / type of cap specific / brand of cap specific /

all depends.

Search power supple capacitance
google cutoff frequency
search cap bypass

should find all the answers you're after.
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post #3 of 15
2/24/10 at 4:07pm
ha, havent you opened up a can of worms....

such a broad subject as to not have an answer
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post #4 of 15
2/24/10 at 4:22pm
Thread Starter 
Quote:
Originally Posted by adamus View Post
its type of use specific / type of cap specific / brand of cap specific /

all depends.

Search power supple capacitance
google cutoff frequency
search cap bypass

should find all the answers you're after.

Quote:
Originally Posted by qusp View Post
ha, havent you opened up a can of worms....

such a broad subject as to not have an answer
Thank you for your reply.

Well I'm just wondering how you make the decision to choose the one value over the other.

Based upon a certain factor, i guess its not realistic to list all
But maybe humor me with an example, so i get the drift.
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post #5 of 15
2/24/10 at 4:35pm
Weibby,

Read this (Tangent's article on input caps): Input Capacitors for Headphone Amps

Just one example, but very informative and a good place to start.

-Mike
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post #6 of 15
2/24/10 at 4:39pm
Calculations based purely on values will give you straightforward answers. For example changing the input/output coupling capacitor on an amplifier will directly effect the frequency response of the amp.

But there's lots of other things to take into account from an engineering perspective, structure, dielectric material etc.

Then a top of that there's lots of subjective things people consider too. Lots of people prefer one brand/line of caps over another etc.
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post #7 of 15
2/25/10 at 12:45am
Thread Starter 
true, throw in the mix of opamps/DAC it'll be an interesting flavor to the sound.
So i guess its vague yet there is a distinct difference with the characteristics.

Any of you guys tried interesting combos?
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post #8 of 15
2/25/10 at 3:05pm
Quote:
Originally Posted by weibby View Post

Any of you guys tried interesting combos?
You just answered your own question. Try different stuff and listen for yourself.
I really like Blackgate NX so far, and have a pair of V-caps on order, so I can find out what all the talk is about.
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post #9 of 15
2/25/10 at 10:14pm
I've tried a bunch in my modded Lite DAC-AH...Obligatto, Audience, Sonicap, Mundorf, Russian PIO and Teflons, RelCap RTX. My favorite to date is the Mundorf Silver In Oil caps. Very, very nice sounding for the money.
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post #10 of 15
2/25/10 at 10:28pm
Quote:
Capitance - value of uF and its relation with SQ
No offense, but that's an overly simplistic way of viewing things. If circuits didn't demand higher capacitance because of the physical laws involved, there'd be no reason to have electrolytic caps in the first place.

Since we do, we have to deal with the fact that they don't sound as good as other caps (film caps). Now does that mean anything if they're in the power supply as opposed to the signal path? Maybe ... maybe not ... it depends.

Generally, electrolytics are large and slow. So, if you want the most detail and the fastest response, go with small films ... but the bass (requires the most power) may suffer. If you want the most bass and the most power, go with large electrolytics ... but the detail may suffer.

Hope that helps ...
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post #11 of 15
2/26/10 at 3:02am
Thread Starter 
You're right.
I'm viewing it at a very simple terms because I don't know any better.

There are many variables placed into the whole scheme that makes the end sound different and SQ different too.

For now this is my understanding or lack of, so far.
Thanks for the response.
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post #12 of 15
2/26/10 at 3:02am
eet eis simple! With the caps which are too small the bass suffers and colapses.

With large enough caps the bass is big and full.

This marks the begining of my effort to hit 10K posts.
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post #13 of 15
2/26/10 at 4:10am
Solution: Use big electrolytic caps for bass and bypass them with small film caps for the highs. Many amps use this design.
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post #14 of 15
2/26/10 at 5:41am
Quote:
Originally Posted by Juaquin View Post
Solution: Use big electrolytic caps for bass and bypass them with small film caps for the highs. Many amps use this design.
Better solution: use a design that isolates AC and DC current loops such that the signal doesn't go through the caps at all, and don't use any other than for ripple smoothing and HF stability.
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post #15 of 15
2/26/10 at 6:58am
Quote:
Originally Posted by dsavitsk View Post
Better solution: use a design that isolates AC and DC current loops such that the signal doesn't go through the caps at all, and don't use any other than for ripple smoothing and HF stability.
There's that too
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