I am using for a long time hqplayer with dac dsc2 and with amanero DDC. With great sound and satisfaction.
A short time ago I bought the Xing U30 DDC to replace the amanero, and it works very well, only some small problem like having to unmute in the xing application every time I open hqplayer or change the playback resolution, i hope that this is solved in future firmwares.
This ddc (Xing U30) brings more and better internal voltage regulators, the question I ask you is, is it worth feeding 5v clean external and separately from usb? In the amanero I always did, in this I think it is not worth it, but I would like to know your opinions, people who have worked with the same components.
For power supplies clean external of 5V will use Salas ubib 1.3.
A short time ago I bought the Xing U30 DDC to replace the amanero, and it works very well, only some small problem like having to unmute in the xing application every time I open hqplayer or change the playback resolution, i hope that this is solved in future firmwares.
This ddc (Xing U30) brings more and better internal voltage regulators, the question I ask you is, is it worth feeding 5v clean external and separately from usb? In the amanero I always did, in this I think it is not worth it, but I would like to know your opinions, people who have worked with the same components.
For power supplies clean external of 5V will use Salas ubib 1.3.
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Ok, in the amanero it is easy to cut a pcb track to feed apart.
But in the xing where I cut the +5v pin track to put +5v clean?
I need cut pcb track in case I connect a standard usb cable and the two 5v voltages don't "collide"
But in the xing where I cut the +5v pin track to put +5v clean?
I need cut pcb track in case I connect a standard usb cable and the two 5v voltages don't "collide"
Remove the part labeled L1 near the USB connector. For Amanero L1 is a ferrite bead to help filter USB +5v noise. For U30 it might be a resistor. The L1 pad closer to the USB connector is where the USB power comes in. The other L1 pad is where to hook up clean +5v to power the local linear regulators. Best to leave U30 powered on at all times to help stabilize the clocks. Clean power ground can connect to the ground plane on the back side of the USB board. Easy to scrape off a little solder mask and connect the clean ground there. What I do is solder a 2-pin header to L1 pads. If I want to use USB power I put a jumper on the header. If I want clean power I connect clean +5v to the header pin that powers local regulators.
In the xing I have seen from the +5v pad of the usb connector a small track goes to a small resistor that enters the first small chip. all this before reaching the resistance "0" marked as L1.
It seems that the 5v from usb before reaching L1 (resistance 0) leads to that other chip. if I remove L1 it is possible that 5v does not reach that small resistance.
It seems that the 5v from usb before reaching L1 (resistance 0) leads to that other chip. if I remove L1 it is possible that 5v does not reach that small resistance.
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The 0-ohm resistor is L1 on a U30 board. Its a ferrite bead on an Amanero board. The 0-ohm resistor is the part you remove. Looks like there are already holes for a 2-pin header. That's where you could put a jumper for USB power, or bring in the +5v at the pin-1 (square pad) of the header holes. Clean power ground still goes to ground plane on the back.
