Let me start by saying thanks for the quick responses. Since this is my first endeavor with tubes it may just come down to tube noise. What confuses me is when the noise appears. The unit could be on and be fine but once a disc enters the unit and it finishes reading, the noise appears. I thought maybe the transport or the led display may be giving off noise. If it was tube noise wouldn't it be constant once the unit was turned on or is the unit just activated when a cd is read? I've tried 4 sets of tubes and all the same thing. Thanks for your answers, JohnnyP.
Jolida JD100 noise issues
Through my experiments I found that the Jolida seems to give off a lot of noise. To explain further I usually do noise floor test by putting my amp full blast with nothing playing to here the noise floor. I found a rough sounding hiss. So what I did is turn off the Jolida and did the same thing and found the hiss was gone. Then I turned on the the Jolida (turning the volume always to 0 before any changes) and found the hiss wasn't there. So I thought maybe it was gone. UNTIL I put a cd in it and once it read the cd the hiss was back. I've tried this with numerous cd's and also different tubes, same hiss. I was wondering if anyone else found this to be and is there any way to remedy this... Thanks JohnnyP.