Hunt, ...please read the above posted by 'Sine Wave', could be of help to you also ?
[ DO NOT TURN THE SPEAKERS OFF ! - THEY SHOULD BE POWERED UP ALL THE TIME: >>> 24 / 7 <<< ]
I also had given up hope but loved the sound of the ProMedia ultra 2.0 speakers, ...once I did not turn them off the 'self-muting' issue was corrected !
Good luck,
Si