Reference DAC Module - Discrete R-2R Sign Magnitude 24 bit 384 KHz

[tiggerkater55]

hi søren,

thanks for comparing the new boards and setting them in relation to the 1021 dam. will the latter be produced again, or will the boards not be reproduced again, when stock is sold?

thanks.

 

[zgtc]

Soekris Engineering ApS, Products dam1941

The core DAC part is almost the same, the new ones are maybe a little bit better, but you can now also get it fully balanced.... The big difference is that on the dam1941/dam1921 all the digital interfaces are integrated, inclusive USB and a second I2S, and you select the power supply and output buffers, the parts where there seems to be as many opinions as there are users....

user manual link is broken. will it be online these days before the 10% off ends? being able to read through its details may be a selling point

 

[bmxmen]

What usb will be best for soekris 1021? I have for nie amanero. But thinking about New xmos from diyinhk. But dont know what version,isolated or not isolated?

 

[soekris]

hi søren,

thanks for comparing the new boards and setting them in relation to the 1021 dam. will the latter be produced again, or will the boards not be reproduced again, when stock is sold?

thanks.

The dam1021 is still being manufactured, until there is no, or very small, sales anymore.

 

[soekris]

user manual link is broken. will it be online these days before the 10% off ends? being able to read through its details may be a selling point

No, user manual is: (coming soon), can't say exactly when, but until then you can take a look at the dac1541 manual, the dam1941 board is a cutdown dac1541 and the firmware is the same....

 

[soekris]

I was looking for pre-order one dam1941. However i have a question, you said you will also propose two buffer and a linear power. Will they be available at the shipping of the dac early October or after ? Will the buffer be opamp base ?

I could be interested in a buffer if it's discrete or opamp base, but not tube. I ask for group shipping.

My current plan is to have an unmounted Power Supply board at start of delivery, but haven't made any decision about what buffer boards to do, the idea is that you can use almost anything there, or somebody will do something, there are so many options....

Also i guess that the dac1101 won't get the new filter, as you didn't answer my previous post.

Can't answer everything immediately, but the plan is to add support for the new filters to all dam or dac products, although is not that easy for the dam1121, and the dac1101 only have a 2mm debug connector so you need to make a special cable....

 

[bmxmen]

What xmos usb will be better with izolaton or without? Very thanks!

 

[fedde]

Hmm I'm kinda interested in doing this mod, is it possible to do this filter mod on a dac1541?

I see no reason why it would not work. Just try it out, you can always revert it if you do not like the change...

Fedde

 

[sbobba]

Hi folks,

Recently I did some experiments to remove the 2 Hz IIR filter from the filter list. The improvement in sound quality is bigger than I would have thought. Removing the filter helps dynamics, clarity/detailing and stereo placement (though also the sound becomes somewhat more brighter & analytical). I see no reason for this filter. This improvement was reported earlier in this thread (where a nice analogy with restored paintings was made). I would advise to try it out for yourself.

Just remove the following part from the filter txt and re-generate the skr with MKROM:

dam1021,352800,8,29,5,1
29 DC Blocking IIR, 352.8 Ksps, 2 Hz HP 1st order

1.00
-1.00
0.00
0.99996438167
-0.00

dam1021,384000,8,29,5,1
29 DC Blocking IIR, 384 Ksps, 2 Hz HP 1st order

1.00
-1.00
0.00
0.99996727561
-0.00

Fedde

I wanted to try the same thing and I was genuinely impressed by the general improvement I got on my system, in terms of spatiality, three-dimensionality, tonal balance and correct instrumental position

 

[Dadbeh]

Soren i need help on how to connect Amanero Combo384 USB I2S board to 1021.

this is the amanero:

which pins shouldi connect to which on the 1021?

also i dont understand where and how to provide 3.3 v from amanero to 1021

 

[Dimdim]

Amanero Pin DAM1021 J3 Pin
------------ ----------------
3 ------------> I2S DAT IN
4 ------------> I2S BCLK IN
5 ------------> I2S LRCK IN
8 ------------> ISO GND (any pin)
9 or 10 -------> ISO +3.3V

 

[zfe]

Soren, with the dam1941, how is the clocking done when the input comes from USB?
Is the clock frequency then fixed, i.e. the tracking turned off?

 

[soekris]

Soren, with the dam1941, how is the clocking done when the input comes from USB?
Is the clock frequency then fixed, i.e. the tracking turned off?

Yes, on the dam1941 (or other soekris dacs with onboard USB interface), the clock is fixed when the source is the USB interface.

 

[Dadbeh]

Amanero Pin DAM1021 J3 Pin
------------ ----------------
3 ------------> I2S DAT IN
4 ------------> I2S BCLK IN
5 ------------> I2S LRCK IN
8 ------------> ISO GND (any pin)
9 or 10 -------> ISO +3.3V

great, thanks. i originally thiught that 9 or 10 on amnero are for the 3.3v from the power supply to power the amanero itself. so how am i supposed to power the ammanero board? i built a reflektor d to power the amanero.

 

[Dimdim]

The easiest and safest thing to do would be to splice open your USB cable going to your PC and feed clean 5V from there (cutting the wire so that the 5V coming from your PC does not get to the Amanero). This way you do not have to "operate" on the Amanero itself.

 

[GhostMM]

The easiest and safest thing to do would be to splice open your USB cable going to your PC and feed clean 5V from there (cutting the wire so that the 5V coming from your PC does not get to the Amanero). This way you do not have to "operate" on the Amanero itself.

Is it really a good idea ? A dedicated low noise power supply seems better...

Can't answer everything immediately, but the plan is to add support for the new filters to all dam or dac products, although is not that easy for the dam1121, and the dac1101 only have a 2mm debug connector so you need to make a special cable....

I open once the 1101 without pay attention but when i watched some photo of the inside i saw some unpopulated headers, guessed their is a serial connection somewhere their...

 

[Dimdim]

Is it really a good idea ? A dedicated low noise power supply seems better...

You always need a dedicated low noise power supply.. I'm just describing an easy way to connect it to the Amanero.

 

[Dadbeh]

i have to apologize for being dim witted but im not sure that i understand.

I have the salas ultra bib 1.3 at +-12 volts to power the dac itself and i see that they go to j1 on the soekris board.

i also have the rflektor d that outputs 3.3 volts. i thought thst this powers the amanero but i guess you are saying that this akso goess to the dac board

i dont understand what you just described about the usb cable. do i neeed to have anotehr 5 v power supply for the amanero? if so then where on the amanero board does it go? i dont see the pin for it anywhere. the problem is that i dont see how the amaneeo board is powered. is it powered througgh the usb port from the computer?

why isnt there a Vcc in or DC in or 5v in or 3.3 in , on the amanero board?

 

[Dadbeh]

if i splice the usb cable open then where do i ger the 5v from? i really dont want to buy or build a 3rd power supply.

 

[Dadbeh]

i have to apologize for being dim witted but im not sure that i understand.

I have the salas ultra bib 1.3 at +-12 volts to power the dac itself and i see that they go to j1 on the soekris board.

i also have the rflektor d that outputs 3.3 volts. i thought thst this powers the amanero but i guess you are saying that this akso goess to the dac board

i dont understand what you just described about the usb cable. do i neeed to have anotehr 5 v power supply for the amanero? if so then where on the amanero board does it go? i dont see the pin for it anywhere. the problem is that i dont see how the amaneeo board is powered. is it powered througgh the usb board from the computer?

why isnt there a Vcc in or DC in or 5v in or 3.3 in , on the amanero board?

i guess instead of asking why isnt any inputs on the amanero, i should ask if it is needed? is just powered by the computer through usb?