mckyj57 @ Tue Feb 19, 2008 1:19 pm wrote:
That usually means your gain is turned all the way up in some input stage (could be FX, too).
Try turning trim and faders down as far as they go. If the hiss disappears, then add trim and fader level until the hiss comes back.
We had that problem before and yes check all the knobs ( sliders ) on all the channels, we had one on an unused channel that was turned all the way up and the hissing was terrible. Good luck!