Alright, so my YS-Audio Symphonies Plus preamplifier arrived in the mail yesterday. It's a very nice unit, great soundstaging and synergy throughout, it's gotten rid of that high frequency annoyance I was talking about previously; but now I have a different problem.
I hear this constant hiss, even when a input source is not plugged in coming from the preamp. It's very subtle, something you would hear on a cheap stereo with the volume about half way up to maximum. But compared to the previous gear I was using, which was a mackie mixer which was dead silent it's rather annoying.
Is this one of the 'characteristics' of tube designs or is it the preamp I'm using? Someone suggested replacing the recitifier tube and that didn't do anything either.
Also, I should note that moving the volume or balance control has no impact on the noise.
