unfortunately, I realized that my speakers are making strange sound. Sound like a constant intermittent (oxymoron, but that is sadly true) noise. Something like noisy volume pot, something like the noise of breeze when blowing directly in your ears. After spending a couple of nights to figure out what is wrong, it seems the DAC is faulty. They are absolutely silent when analog out of my CDP goes into lyrita. I initially thought it was lyrita pre that was the problem, but digging deeper I figured out that it is a problem with dac, and both coaxial and optical.