I recently got a 1964 Epiphone EA28RVT Pathfinder (same circuit as the Gibson GA19RVT Falcon) that I love but it sounds even better paired with my 5E3. I'd love to have the tremolo and reverb from the EA on the 5E3 and I can do it through the Monitor out of the EA but: - when I first got the EA, the amps were out of phase when using a stereo pedal to feed both amps. - I swapped the wires on the speaker of the EA. The amps were now in phase when using the stereo pedal. - The amps were out of phase when using the Monitor out to feed the 5E3. - I swapped the wires on the EA's speaker again and did the same on the 5E3. - The amps are in phase when using the stereo pedal but they're still out of phase when using the Monitor out! I can't understand why this would happen! I'm using the second input of the bright channel on the 5E3, if that matters. I attached the EA schematic in case someone can take a look and explain this to me. I've be very grateful.