DAC 2496 (AK4393) DAC KIT With CS8416+AK4393+5532 - Page 124 - diyAudio
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Old 17th February 2012, 11:19 PM   #1231
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hi, thanks for that info, I'm useless at data sheets but I see the resistor and cap you mention.
Here's a quote from Fikus whom I'm copying.



I wired the signal directly to the s/PDIF output - my newly installed RCA socket.
I tried it with the series cap and without, with the 75 resistor and without, and the conclusion is that no cap solution sounds best.
I used - starting from the source -> a wire, an L-pad to reduce the output by 1:4, -> 270 Ohms series to pin of RCA hot and from there -> 75 Ohms to ground,.

I believe it is 5 volts
If I leave the dacs circuit as it is, what would be the voltage should I use the recommended 270 in series and 75 to ground at the phono socket.

article here Fikustransport

Last edited by j baldam; 17th February 2012 at 11:28 PM.
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Old 17th February 2012, 11:33 PM   #1232
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Quote:
Originally Posted by j baldam View Post
hi, thanks for that info, I'm useless at data sheets but I see the resistor and cap you mention.
Here's a quote from Fikus whom I'm copying.



I wired the signal directly to the s/PDIF output - my newly installed RCA socket.
I tried it with the series cap and without, with the 75 resistor and without, and the conclusion is that no cap solution sounds best.
I used - starting from the source -> a wire, an L-pad to reduce the output by 1:4, -> 270 Ohms series to pin of RCA hot and from there -> 75 Ohms to ground,.

I believe it is 5 volts
If I leave the dacs circuit as it is, what would be the voltage should I use the recommended 270 in series and 75 to ground at the phono socket.
With a 5V input swing, the 270R, 75R resistive divider will give you a voltage swing of 75 / (270 + 75) * 5 = 1.36V. However, the current will be 5 / (270 + 75) = 14.5 mA (and the output won't really be 5V at 14.5 mA) which a lot more than it needs to be, but it will work as the HC08 can do up to 25 mA.

I don't see how removing the capacitor would make it sound better. This is a digital signal after all, and this capacitor does not add any jitter. Furthermore this would be going against recommendations in the datasheet.
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Old 18th February 2012, 01:29 AM   #1233
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Hi, thanks for the maths, I wouldn't know where to start.
The cap he refers to must be in the player as he isn't connecting it to any particular DAC.
I think he tried the cap in series as this must be standard practice.

So you would recommend I go with 270 and 75.

Last edited by j baldam; 18th February 2012 at 01:54 AM.
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Old 18th February 2012, 06:11 PM   #1234
Ryssen is offline Ryssen  Sweden
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Im testing mine tonight,It sounds quite good.I dont have the best output trafos some small mic trafos so the trebble is quite laidback.
I will by some more decent trafos when I can afford it.
But what I hear is quite good.
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Old 18th February 2012, 08:46 PM   #1235
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Hallo

I use Ordinary toroidal traffos. Is it better to use the R-core from eBay?

Brian
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Old 18th February 2012, 08:51 PM   #1236
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hi,
I bought mine complete in a case with the transformer you mention.
Can't fault it, perfect combination.
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Old 18th February 2012, 09:17 PM   #1237
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Quote:
Originally Posted by j baldam View Post
hi,
I bought mine complete in a case with the transformer you mention.
Can't fault it, perfect combination.
Hallo

but you have not compared the two types?
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Old 19th February 2012, 12:51 AM   #1238
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Default Anyone used Nichicon KZ instead of ELNA?

Wondering if anyone has tried The nichicon KZ in place of the Elna RFS, and ROA on the PS+ ? I'm trying to order all my parts from mouser. They don't stock those caps. BUT in the BOM it has them for a substitute, Will these sound ok? also will Nich. FW's sound oK on Digital 3.3v instead of the BC comp. everyone raves about the Elna's! I would like those but trying to make it easy ordering wise. It should be better than stock, YA. If anyone has any idea what these sound like post it up thanks! Basically every cap is going to BE NICH. FW,LF,and KZ according to BOM. Should i order these or stay away. I don't know a thing about caps. I just want some bass and less SSsss on the trebile. Thanks.
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Old 19th February 2012, 07:51 AM   #1239
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Quote:
Originally Posted by Silver84 View Post
Hallo

but you have not compared the two types?
Hi, I don't think I need to.
My dac sounds very good in my Exposure system and sometimes I don't understand posts like the one above this one that there is a lack of bass or the treble is sibilant or mine gets hot or there are no dynamics.
Mine just gets on with the job of playing music and I'm loath to touch it in any way.
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Old 19th February 2012, 08:43 AM   #1240
erin is offline erin  Australia
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Quote:
Originally Posted by swanny50 View Post
Basically every cap is going to BE NICH. FW,LF,and KZ according to BOM. Should i order these or stay away. I don't know a thing about caps. I just want some bass and less SSsss on the trebile. Thanks.
Since you asked, based on my subjective opinion, KZ will have deep sub bass, tight but moderate mid bass, a controlled but recessed sounding midrange and a tight and controlled HF.
Sounds good yes? Well, not really when compared to a better cap such as Elna RFS. RFS has a relaxed extension in both frequency extremes and a "flow of sound" that is much better.
Overall, KZ is a tight sounding cap. It might suit some, but not my favorite, too tight!
Why don't you order from Parts connexion instead?
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