Hi,
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,
Cano
Comments
Current plan is to relocate the setup to another room tonight to rule out EM interference from anything else in this room.
Also Orange Support are looking at it, they thing the Terror Stamp may have a fault so we're seeing if they have a loaner unit to send out so I can swap that in/out with the other two and work out which (if any) is the issue.
As solo mono amps both work perfectly, it just as soon as both are running through a stereo FX pedal, even with no power to the pedal, the pulsing hum starts.
I'd read that Stereo rigs weren't simple, kinda understanding that now.
It may be that I need to get a new power brick for the Micro Dark which isn't exactly expensive and if that works and I can return the Amp Detonator then I'm quids in actually.
Basically, as soon as the 2nd amp psu is connected the pulsing hum starts, even when the mains power to that psu is off.
If I swap the psus between amps, the hum moves to the other amp.
Anyway, I've just ordered a new PSU from Orange and will see if the one that came with my new Terror Stamp, or the old Micro Dark is the issue. If all combinations of PSU continue to hum then I know it's one of the amps.
I'll get the whole board back together and try properly later (my kid's sleeping in the next room right now) but in my basic test of 2 amps, one pedal and no input.... Beautiful silence.