Why Preamps Thump on Turn on

@atmasphere Wow that is some serious entitlement there. I’ll get to it when I get to it.  I had time then, i don't right now.  Sit and spin until you cool off.

@atmasphere   Thanks for the follow up... I'll have to go take a look when I have time, which may be a while.

Amplifiers should always be turned on 1st and last off! This will eliminate speaker thump due to large current inrush filling capacitors in the amplifier.

The inrush current is the same whether first or last.  However, turning it on first will cause the amp to amplify any thumps caused by upstream components, if any.

The amp may cause the AC voltage to dip momentarily, but that's not a problem for any other components that are already on.

I am often reminded how difficult it is to write something that others find fun and engaging. 

Um.....