stevem Messages: 4733 Registered: June 2004 Location: NY
Senior Member
If you go into this sites tech section and pull up the schematic for the combo or organ, then go to page 9 and on the lower right side above the info box you will see the output marked as " to power amp"
This is where you want to break the signal chain open which is this hot lead so to speak and install a jack on each end.
Your ground for each jack will be the chassis.