I get a lot of hum coming from the amp's speakers when I use my HX Stomp. Through careful elimination, I've found it to be caused by the Stomp's power supply.
I initially thought it was the Stomp itself but then noticed that it happens even with the unit turned off, as long as the power supply is connected.
As a matter of fact, simply bringing the cable (the one plugged to the amp) close to the power supply or its lead is enough to bring the hum back. They don't even need to touch and the power supply doesn't need to be connected to the stomp either.
As long as the power supply is plugged to the wall, bringing the cable near the power supply's unconnected plug is enough to cause the hum. Unfortunately the hum is also there when everything is connected and turned on.
If I unplug the power supply from the wall, the hum stops.
I cannot replicate the problem with any one of my other two power supplies (for pedals and a preamp, respectively).
Has anybody experienced anything similar? The Stomp stock supply can't be that noisy, can it? Maybe mine has got a problem?
Any tips would be much appreciated.
Thank you,
Marcelo