Tweet
when i plug passive instrument to passive input i hear sound of bass + hum whitch sounds the same all the time - it doesn't change when i move my guitar. When i turn the volume knob to 0- hum is gone.
Hum appears when i just plug any cable to passive input (even if i touch the ground with my finger). There is no hum when i plug calbe into active input.
I have tried other cables and passive guitars and it was always the same. I've changed Tube in preamp to brand new one too.
i know i can be a pickup matter, but maybe someoone know how can i minimize this hum?
p.s. sorry for my english
Hum appears when i just plug any cable to passive input (even if i touch the ground with my finger). There is no hum when i plug calbe into active input.
I have tried other cables and passive guitars and it was always the same. I've changed Tube in preamp to brand new one too.
i know i can be a pickup matter, but maybe someoone know how can i minimize this hum?
p.s. sorry for my english