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Reference DAC Module - Discrete R-2R Sign Magnitude 24 bit 384 Khz
Reference DAC Module - Discrete R-2R Sign Magnitude 24 bit 384 Khz
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Old Yesterday, 11:10 PM   #8041
ynmichael is offline ynmichael
diyAudio Member
 
Join Date: Nov 2015
Quote:
Originally Posted by TNT View Post
Pic of reconstruction filter caps. and vRef mods.
Quote:
Originally Posted by TNT View Post
I'm now on FKP2 since 30 minutes. This is much more easily consumed. And yes some beaming in the upper midrange is gone. Stage larger but a little more fuzzy where the room ends. More bass. Did the cheap styroflex have anything on these... there was something exiting that I can't really put my finger on... lets listen for a few days on these now....

The cheap styroflex are probably for the explorative and curious...
Is FKP2 better than ceramics?...

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Originally Posted by TNT View Post
Seemed like diminishing returns...

//
You could be wrong Especially considering that a LSB in 16bits is almost the diminishing returns you're looking at...


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Originally Posted by TNT View Post
Do my 0 ohm hurt?
Does my 0.1 ohm hurt SQ?...

Last edited by ynmichael; Yesterday at 11:25 PM.
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Old Today, 12:11 AM   #8042
ynmichael is offline ynmichael
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Join Date: Nov 2015
Quote:
Originally Posted by bambadoo View Post
To be clear.
Here is my cap mod.
Reference DAC Module - Discrete R-2R Sign Magnitude 24 bit 384 Khz - Page 372 - diyAudio

Each cap is 1000uf . 4*1000uf each rail.

But I got a pm from a great guy. One suggestion was reducing the value of the series resistor. I did only have approx 170mohm there. I parallelled it with another 180mohm. => 90mohm.
I also removed C135 and C142 just for the fun of it.

Things became alot better.
Need to order some more resistors. (0.01ohm as I dont have these on hand. ) and 499r as suggested at moreDAMfilters. Do some testing afterwards.

At least it seems as the value of the series resistor make a quite a big role in the SQ of the dam (maybe especially with added capacitance).
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