Knghifi, looking down on the HAPZ1 with the front closest to me, the fuses were installed with the S to the left and the R to the right. Again, I found the directionality to be rather obvious. The fuse in the front is labeled HDD live. The one towards the back is labeled Mains Live. Look off to the left and towards the back for the label. I asked Dan Wright a number of questions, including "which fuse serves the DAC." He didn't answer that particular question.
It may be that the mains fuse is serving mostly uses such as the display, which would explain that fuse having little or no impact of the quality of sound.
It may be that the mains fuse is serving mostly uses such as the display, which would explain that fuse having little or no impact of the quality of sound.