I own the first version of this DAC and it’s sounding superb!
BUT: Important information is missing in the manual.
Output level via RCA Cinch is rather low and balanced output is recommended.
The question is, who, especially in this place, owns a balanced input pre? I think almost
no one! For unbalanced output (RCA Cinch) you need to have enough gain on the amp for adequate output level or you have to modify balanced output stage- but that’s not too easy and expensive.
Forget the ac adaptor. Take a good quality torroidal power transformer with the above mentioned values. One with two 7.5V secondary sections is needed. That’s the next problem. Most of these transformers are delivered with 6V, 9V, 12V… so 7.5V are hard to get. If the AC voltages of the transformer are too high, you may burn the voltage regulators on the board or make them close their output, if AC is too low, you’ll get hum on the line output. Unfortunately you won’t find this info in the manual. Seems that G2Labs is developing for specialists :mrgreen:
In addition you need of course 5V DC power for the pi that you can connect directly to the DAC board (described in the manual).
On the raspberry pi you have to do minimum soldering: an 8 pin header has to be soldered to the P5 connection of the pi- in this case it has to be done on the BOTTOM of the pi! Afterwards raspi will fit on the presoldered female header of the BerryNOS DAC.
On the new RED version RCA connectors have to be soldered to the board also (if needed).
This little help is for all who intend to try this DAC. Actually response from G2Labs is rather poor, so I think this clearing up was necessary.
So, dear guys from G2Labs- please correct me, if I’ve got something wrong!