Hi Kraftsound - had to smile...DIY is usually the most cost-effective option if you have the skills and materials available - but if you think Doukmall’s $58 for a split USB cable is expensive, check out what iFi is asking for their GEMINI split USB cable! $58 seemed a bargain by comparison.
Do You Use USB for Streaming?
If so, you might be interested in the cable below
Power supply and USB cable separate audio signal cable
I use an Enercell USB Power Adapter as the power source
ENERCELL AC to USB Power Adapter 5VDC 1000mA 2730414
As it happens, using power from the USB port to supply the DAC's internal USB circuits is common practice.
The dual cable prevents RFI/EMI between signal and power conductors, as in conventional USB cables.
The quality of the cable itself is also very good and performed better than a very good "boutique brand" with both USB-A plugs plugged into my iMac
The biggest improvements I found were in clarity, image and dynamics.
I have compared the sound using the Enercell power supply to using a USB battery pack and could hear no difference, which means the power adapter is very quiet.
Season's Greetings :-)
Power supply and USB cable separate audio signal cable
I use an Enercell USB Power Adapter as the power source
ENERCELL AC to USB Power Adapter 5VDC 1000mA 2730414
As it happens, using power from the USB port to supply the DAC's internal USB circuits is common practice.
The dual cable prevents RFI/EMI between signal and power conductors, as in conventional USB cables.
The quality of the cable itself is also very good and performed better than a very good "boutique brand" with both USB-A plugs plugged into my iMac
The biggest improvements I found were in clarity, image and dynamics.
I have compared the sound using the Enercell power supply to using a USB battery pack and could hear no difference, which means the power adapter is very quiet.
Season's Greetings :-)