There's no science involved here, all there is is a bunch of guys who lack a basic understanding of electronics that are finding novel ways to butcher a design 😀
Do you know Julf?
You two would get on really well.
Even though I am aware you actually try things (like better clocks) in your gear, that gives you some credibility.
But your dismissal of others findings is pretty sad since you have no idea whether what they have suggested does anything or not. Doesn't fit your self-constructed model of how the world works and you are the one talking about religiosity.
Amusing.
You two would get on really well.
Even though I am aware you actually try things (like better clocks) in your gear, that gives you some credibility.
But your dismissal of others findings is pretty sad since you have no idea whether what they have suggested does anything or not. Doesn't fit your self-constructed model of how the world works and you are the one talking about religiosity.
Amusing.
This may be a dumb questions and asked a lot!
but the DC input of the Soekris board is 7-15V correct?
seems it varies a LOT!
I am about to buy some psu kits and want to be sure to get the right ones for my DUAL dam1021 setup.
would it be better to have lower DC voltage to keep temps down? or is a 12V ok?
What is the advantage or disadvantages I should keep in mind?
higher voltage would help with buffers or output maybe? this is all I could imagine would be needed.
I plan to use unbuffered outputs to my audio-gd master11 amp. this would be the best setup right? I also want RCA outputs and wonder if I can have one pair buffered, one pair unbuffered.
Is 9V plenty for all this? or why do some people choose to go with 12V input.?
again, i'm sorry if this is a stupid question.
i'm debating between buying one of these
Classic Reference 78xx power supply linear regulator 3.3V 5V +-12V - DIYINHK
and replacing the four regulators with belleson superpower MK2 regulators for both rails - maybe 9V output
or just get one of these at 12V
0.8uV Ultralow noise DAC power supply regulator +-9/12/15V 1.5A*x2 - DIYINHK
i believe it will be able to be dual rail two outputs. one for each dam1021
but the DC input of the Soekris board is 7-15V correct?
seems it varies a LOT!
I am about to buy some psu kits and want to be sure to get the right ones for my DUAL dam1021 setup.
would it be better to have lower DC voltage to keep temps down? or is a 12V ok?
What is the advantage or disadvantages I should keep in mind?
higher voltage would help with buffers or output maybe? this is all I could imagine would be needed.
I plan to use unbuffered outputs to my audio-gd master11 amp. this would be the best setup right? I also want RCA outputs and wonder if I can have one pair buffered, one pair unbuffered.
Is 9V plenty for all this? or why do some people choose to go with 12V input.?
again, i'm sorry if this is a stupid question.
i'm debating between buying one of these
Classic Reference 78xx power supply linear regulator 3.3V 5V +-12V - DIYINHK
and replacing the four regulators with belleson superpower MK2 regulators for both rails - maybe 9V output
or just get one of these at 12V
0.8uV Ultralow noise DAC power supply regulator +-9/12/15V 1.5A*x2 - DIYINHK
i believe it will be able to be dual rail two outputs. one for each dam1021
Thanks, this is very clear to me.
I just modified the NMR last night, now the DSP (the one running at high current and frequency) is powered by LT1083 and the CPLD is powered by shunt reg. Since the CPLD has direct connection to the DAC's input, I am sure that it gets clean enough for direct I2S connection.
It depends 🙂
I'm running the board with +-8vdc
I've bypassed the PS input bridge and removed the opamps for the balanced output.
So without the voltage drop of the input bridge and without the output opamps I have enough with 8vdc for the 5vdc regulators.
With the balanced output you need more voltage.
Regards,
Danny
If removing the output opamps you could even remove the 5vdc regulators and feed the board straight away with 5vdc through a shunt- or superregulator. Haven't tried myself but i would guess that would possibly give even bigger improvement.
Although myself i will probably just feed with around 8vdc like you danny_66, to minimize removal of components.
Although myself i will probably just feed with around 8vdc like you danny_66, to minimize removal of components.
I just wanted to report about my experience with the DAM
I bought the 0.02% Rev 3 board. I hooked it up with a standard PSU
with +/- 9V and bulit all that into metal case. At the moment I'm running
only optical in and raw analog out.
I feed the DAM with my RME Fireface 400 clocked by an Black Lion
Audio Micro Clock MK3. It sounds really excellent to my ears through
my Stax SR-Omega headphones! Befor I got the DAM I used an old
1987 Sony DAS-R1 (at that time one of the the best and most expensive
DACs) with wordclock output clocking my RME interface while sending
the data to the Sony DAC. It is also a R2R DAC with TDA1541 chips.
Unfortunatly it is limited to 44.1kHz only why I tried the DAM.
All in all I like the DAM as much as this masterpiece of early DACs!!!
Imo it has outstanding resolution, image and musicality!! I have tried
some DACs like the Violectric V800, M2Tech Young and a Sabre DIY
DAC before going with the Sony and not one of them can reach imo the
performance of the stock DAM.
As I am now perfectly happy I am not planning to make any mods to the
DAM. I also did try different filters and found the stock soft filter of the
FW 1.05 sounding best to my ears (tried the party pack 0.99 as well). I also
can't remember to have noticed any difference when going fom battery to
transformer based psu.
One thing I did notice that improved the sound of the DAC really a lot
was the clocking of the RME interface as transport to the DAM. Running
on it's own clock the sound is much less clear and with much less details.
Using the external clock made the sound much more open and vivid! I tried
this A/B as the RME can switch the clock input on the fly from internal to
any external digital connection. There is only one thing I am hoping for: A
Wordclock in- and output. Hopfully in one of the next firmware revisions
if this is possible without changing something on the board.
So after this long post I would like to thank Soeren for his work wich made
it possible for us to have this wounderful DAC!!! Thank you!!! I am happy
that I got such a great DAC and I think it is absolutly worth the money!!!
I bought the 0.02% Rev 3 board. I hooked it up with a standard PSU
with +/- 9V and bulit all that into metal case. At the moment I'm running
only optical in and raw analog out.
I feed the DAM with my RME Fireface 400 clocked by an Black Lion
Audio Micro Clock MK3. It sounds really excellent to my ears through
my Stax SR-Omega headphones! Befor I got the DAM I used an old
1987 Sony DAS-R1 (at that time one of the the best and most expensive
DACs) with wordclock output clocking my RME interface while sending
the data to the Sony DAC. It is also a R2R DAC with TDA1541 chips.
Unfortunatly it is limited to 44.1kHz only why I tried the DAM.
All in all I like the DAM as much as this masterpiece of early DACs!!!
Imo it has outstanding resolution, image and musicality!! I have tried
some DACs like the Violectric V800, M2Tech Young and a Sabre DIY
DAC before going with the Sony and not one of them can reach imo the
performance of the stock DAM.
As I am now perfectly happy I am not planning to make any mods to the
DAM. I also did try different filters and found the stock soft filter of the
FW 1.05 sounding best to my ears (tried the party pack 0.99 as well). I also
can't remember to have noticed any difference when going fom battery to
transformer based psu.
One thing I did notice that improved the sound of the DAC really a lot
was the clocking of the RME interface as transport to the DAM. Running
on it's own clock the sound is much less clear and with much less details.
Using the external clock made the sound much more open and vivid! I tried
this A/B as the RME can switch the clock input on the fly from internal to
any external digital connection. There is only one thing I am hoping for: A
Wordclock in- and output. Hopfully in one of the next firmware revisions
if this is possible without changing something on the board.
So after this long post I would like to thank Soeren for his work wich made
it possible for us to have this wounderful DAC!!! Thank you!!! I am happy
that I got such a great DAC and I think it is absolutly worth the money!!!
The v3 board is the best that it gets from a stock configuration, sure you could add some larger caps using the new via holes on the v3 design, however its not like the v1 (and v2 to lesser degree) boards where the mods provided a significant improvement.
Hey Soeren,
my 1101 is here and runs great! Best feel and Ultra High End, great success at an unbelievable price, thank you!!!
my 1101 is here and runs great! Best feel and Ultra High End, great success at an unbelievable price, thank you!!!
What kind of input did you use for the Fireface? The firewire or the SPDIF?
In principle due to the DAMs FIFO and reclocking, the input signal timing quality "should" have no influence. If it has, it would be interesting to investigate this in more detail to pin down the reason.
Well, then Sören has something to think about - maybe.... I would think the strategy would be watertight. Have not tried any variants myself - just tried one i2s source once - only run toslink.
It cant be clocks as the PLL is at 30 seconds something... earth, well not if isolated. Information loss i.e. a 1 becomes a zero oww - naaaa. Radiated (inductive, capacitive, nuclear, heat, light...?) disturbances - could be.
I would say that information loss is the only plausible cause - what is the bit error rate of the isolator?
Or the PLL.
Because its not magic - right?
//
It cant be clocks as the PLL is at 30 seconds something... earth, well not if isolated. Information loss i.e. a 1 becomes a zero oww - naaaa. Radiated (inductive, capacitive, nuclear, heat, light...?) disturbances - could be.
I would say that information loss is the only plausible cause - what is the bit error rate of the isolator?
Or the PLL.
Because its not magic - right?
//
which i2s sources have you tested, are those different USB receivers like XMOS from Diyinhk and Amanero usb receivers?
what happens if the i2s fed from external sources? dos the dam bypasses its native clock?
But the entire digital data distribution and signed magnitude is being done using the FPGA which inturn uses the dam onboard oscillator. So how does and why the difference is perceived when i2s being fed from external receivers.
well subjective results wont mean anything to some
tested
jlsounds oem
2 versions the new and old diyinhk xmos units
amanero
el cheapoish sd card player i2s
and all with and without synchronous reclocking pre i2s isolators when i had em in
all the xmos ones sound similar but not the same other ones are more dissimilar
i don't know why there is differences it makes little sense
but i do have preferences
it would be an easier life if you believe there isnt any differences and my ears just aint workin good
im sure the fpga system levels the playing field somewhat though