Cables are fine. Ran the guitar directly to H9 and the green lit right up. So would it be that the EVH 6L6 has to low of a output? I don’t understand why the H9 doesn’t see the effects out signal. Like a said it sounds fine, but I would like to max out the input level to get full sound without clipping and when I change the input level and has no effect on what I hear from the speakers but I can however change the output level.