DAC / USB outputs in MONO? HELP

I thought a USB cable had a limit of 5 meters max (around 16 feet) before signal degradation happens. Can you try a shorter cable to see if that works?

Kind of went down that road and thought that the limitation of 5 meters is for supply voltage losses. My DAC SMSL Su8 has an internal power supply. 

I have just discovered that there is a problem with my SMSL DFU driver which has a yellow caution tag???  

Delete the driver in Windows and download the manufacturers driver from SMSL.

Setup most likely - not a cable ... do a search on google for " sound settings windows 10 usb dac " and you may find a host of results with options.

An example:

addictedtoaudio.com.au/blogs/how-to/how-to-get-perfect-sound-

from-your-dac-windows-edition

Check your settings in windows ...

I replaced the SMSL with a Emotiva XDA-2 and no cautions now but still no stereo.

Check the little toggle switches on the back of the Threshold RCA/AES selectors.

Try inputting a CD player or something else into the DAC, it's probably the computer.

Thanks lordmelton but mine is the first series and doesn't have switches.

Maybe TOSLINK would be better for this 20ft run?

Maybe it’s a Windows setting.

Windows lets you convert stereo sound into a single channel so you can hear everything, even if you’re using just one headphone. Select the Start button, then select Settings > Ease of Access > Audio, and then switch on the toggle under Turn on mono audio.

Headphone connected directly to computer, and NO stereo?????

OK,

* * * * *  I'm embarrassed  -  It had MONO selected * * * * *

Thanks SOOO much yage and everyone else.

Now that I have lost a day and a half,

I can now listen to some music... (OM is smiling now)

Cheers, Darrell