squealing

Hi everyone, So I have a Behringer Ultrabass BX4500H head I've been using for the last 13 years that I play through a Behringer BA810 cabinet. Normal wear and tear throughout the years, but nothing too rough (no falls, tips, and hard slams). I went to my band's jam space to practice alone and...

In my pedal chain, which goes Bass, Stax 5 band eq to Boss ODB-3 Over Drive to VoxstompLab IB muti-effect to Radial Big shot ABY to amps. My Vox squeals while under AC power. If I use battery power it doesn't at first thought it was daisy chain power supply. So, I bought an Isolated power...