Start up the ARC preamp first, wait until it get out of mute after its start up cycle completes, put it in mute manually, then power on your amp. Power on order - source, preamp then amp. Power off order - amp, preamp, source.
As to your problem, most likely tune(s) in the ARC preamp need to be replaced. So it’s important to follow the power on and power off order.
System Static Issue
Have an interesting situation in my system that I have at my work location. The system is leftovers from other upgrades but since it is used primarily as background it fullfills that quite well.
Recently, when I start it up in the mornings, while the preamp is in mute mode and volume is at 0, with no input signal, I will get a static sound out of both speakers, intermittent, but there.
I am assuming it is the tubes in pre (ARC LS17 se)
Have checked all connections and moved each (without static) to make sure that was not the problem.
Set up is used either to stream from internet or through a PSA Jr from SSD with music library on, through JRiver.
Before I get new tubes wanted to see if there are other issues I should consider.
ARC LS17se
Bedini 100/100
PSA DSD DAC Jr
Shahinian Arc
Furman Power PL Plus