Help needed - Only one channel playing!

Again, thanks to everyone for responding with ideas and suggestions.

It appears the problem is with the Dac. I am also noticing distortion, where the music sounds weird rather than hearing an obvious noise. So far, the problem has not been reproduced with a different Dac in place.

I have contacted the manufacturer to arrange an inspection and repair.

If I learn more about this problem, I will share it for the benefit of all.

BTW, the AGD Audions are amazing!

Glad to hear that all’s well! But it sounds like something is loose. Let us know if it happens again.

Check to make sure your power cables are pushed in all the way and firmly seated on the audions. AGD can be fussy with certain power cords 

UPDATE:

I just reconnected the monoblocks directly from the Dac, and both channels are singing away as though nothing ever happened. This is truly an amazing mystery.

Is it possible that a DAC can behave this way? I cannot find the problem in the cables, having it occur with XLR and RCA cables.

Thanks everyone for responding.

I apologize for any confusion and will attempt to be clearer.

• I have been using the Leedh volume control in my Lumin U2 streamer to good effect. It is clearer than the preamps I have or have tried. However, there is some loss of body or warmth.
• The problem I am describing happens with direct dac to power amps or going thru an integrated amps preamp out circuit.
• Thanks, @carlsbad2. When the problem showed up in the right channel, I had moved the cables from an integrated amp to the monoblocks. I didn't touch the source connections; all other connections remained the same. I went back to the integrated, and everything worked as expected. I think your suggestion to keep changing equipment is the only option I have.
• @zlone I've checked the cables and connections, including manipulating them to see if there is a faulty connection somewhere, but haven't located it if its there. Will recheck some more.

Again, thanks everyone.

Confused as well, which component is controlling volume in this setup?

It can also be a cable.

@soix Preamps are becoming obsolete.  Most source components (other that TT) provide more than adequate voltage to drive an amp.  I much prefer passive Transformer Volume Control.  Volume control in roon is much better than many other choices.  So very possible.

@quattro4x I couldn't follow all the changes.  But I'll say that as you move equipment around you can eliminate components.  When you swapped the amps and the problem didn't move, that eliminated the amps.  When it moved from left to right, that is something you swapped.  Cables?  

The failure can be in any component in your system so keep swapping until you find a component that when you swap it, the problem moves.

Jerry

I don’t understand — how are you driving the amps with the Terminator?  That doesn’t seem possible.  Is there no preamp in your system?  Something’s missing here.