Which opamps did you try at the output and which one did you find the most pleasing (if there was a difference at all)?
You mean bypassing an external output stage, just taking the output voltages from J1 at Zout=640R? What is the input impedance of your next unit in the chain?
Yes 640 ohm. I did one comparison when I got my first DAC and never looked back. A few variations between a couple of k to 50k. According to the designer, the only thing that happens is that the output level is decreased - no other impact. You could short circuit the output without hurting the electronics as I understand it.
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I have another question concerning the Atmega-controlled volume: the dam1121 manual says that the COM_RXD, COM_TXD ports work at 3.3V digital level. The Atmega TXD/RXD, on the other hand, operate at 5V level. How do you solve this? Can simply the insertion, say, 2k2 resistors in the RXD/TXD lines save the day? Or do I need to include a proper level shifter?
Thanks,
Miklos
Thanks,
Miklos
I recommend a level shifter. A resistor voltage divider might work for slower signals, but might not be very reliable.
Does anyone know if a Talema 62033 will work as a trafo for this DAC? It's rated as 7VA 15V 466mA in parallel. If I'm using a Salas UltraBiB, should I run it at ±10V?
Dear Santa Soren - is there any chance we’ll see availability of the 1121 (or it’s successor) any time soon?
Strange question: I really would like to hear a Soekris DAC compared to a DDDAC1794 4deck (which I have).
Is there anybody in the Netherlands who can lend me his Soekris DAC, or come to my place in Utrecht and do the comparison?
Of course drinks and snacks are on me. 🙂
I have a lot of Nelson Pass stuf, you can listen to that in return...
Please DM/PM me.
Is there anybody in the Netherlands who can lend me his Soekris DAC, or come to my place in Utrecht and do the comparison?
Of course drinks and snacks are on me. 🙂
I have a lot of Nelson Pass stuf, you can listen to that in return...
Please DM/PM me.