Power Station squeal even in bypass

Stage & Studio Power Station PS-100
1

I’m dealing with a squealing issue with all my amps into the Fryette.

When using high gain on any of my amps (mark vii, jp2c, revv generator 120) if the master volume goes above 12 o’clock a squeal noise shows up. If I bypass the power station the noise doesn’t go away.

However if I connect my amp into the cabinet directly with the same settings and even higher volume no squeal is heard.

Here are videos demonstrating the issues, my guitar volume is rolled all the way down in all videos and the guitar is around 3 meters aways from the amp and cabinet.

Squeal in operate: Watch Squeal in operate | Streamable

Squeal in bypass: Watch Squeal in bypass | Streamable

2

Since I can’t post three links in the same post, here is the link showing that there is no squealing when connected directly to the cabinet with the same settings on the amp: Watch No squeal when connected direct to cabinet | Streamable