The preamp is a custom guitar tube amp. It has a preamp out and bypasses the power section. There is some noise when using the amp alone but magnified when going through the Mcintosh and JBL speaker. Thanks for telling me it could still be the pedalboard. I'll do some more troubleshooting to...
I have been experiencing a bad, loud, and variable noise in my electric guitar rig. Here is the details of the rig (I will include as many details as possible since ground loops are tricky):
> Electric Guitar (active electric guitar with on-board buffer, 9V battery, and On-Board Effects Loop...