I received the M-DAC yesterday, I was expecting to be wowed after reading all the reviews and positive feedback from people who own it.So i carefully unpacked it, took my time reading the manual and set it up within my existing system. I played it for an hour or so waiting for a revelation, but absolutely no difference at all compared to my Marantz cd player. I thought there must be some subtle difference between the two, so plugged the Marantz back into the amp, played a track and switched between the two inputs straining my ears for any change in sound. If there is, my ears must be faulty as i couldn't pick out anything. The plan now is to send it back and get a cheap DAC, so i can plug my Panasonic into that.