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Need some help with a Stereo Rig
I've recently been playing through an Orange Terror Stamp and decided that I need to make the most of my Eccos' stereo output (as well the the Immerse Reverb) so I added an Orange Micro Dark and matching cab.
However I have this pulsing sound that starts whenever the Terror Stamp is powered up. Initally I was using a very cheap ABY from AliExpress but replaced that today with the Orange Amp Detonator with its buffered and isolated outputs. However it hasn't fixed the problem.
There's a quick video here of the sound, as well as the combos of having the amps on/off. https://youtu.be/OOQ7RR_opV0
The signal chain is :
Input - Tuner - Drive Pedals - Orange ABY - Output to each Amp In - FX Send to Eccos (both amps) - Immerse - Outputs to FX Return on each amp.
I've tried the Phase button on the Orange Amp Detonator but that didn't get rid of the sound.
What am I doing wrong here? I've tried it with nothing in the FX loop and the sound is still there, but much quieter and coning from the opposite amp (Micro Dark)
I've also tried swapping the A and B on the ABY and the inputs/outputs on the FX pedals but there's no change either.
My pedals are all powered by a TrueTone 1 Spot CS6, all on isolated outputs.
Edited to add: I've just tried a bit more unplugging/plugging combos. It would seem that as soon as the FX loop of the Micro Dark is connected, the pulsing starts from the Terror Stamp.
Thanks for the help,