nickrose:
Timothy is right in that signal levels are very important. If it is noisy with the switches in the line position, try them in the guitar position.
The hiss is equal whether the switches are in line or guitar position.
Dirty power could be the problem since I don't use original wallwarts. But, have to say that other devices in my signal chain don't add any noise or hiss. Just Factors, when in DSP Bypass mode.
