Plug in preamp while amp is on caused very loud pop on speaker.

Power amps: Last on; First off. Power amps: Last on; First off. Power amps: Last on; First off. Power amps: Last on; First off. Power amps: Last on; First off. Power amps: Last on; First off. Power amps: Last on; First off. Power amps: Last on; First off. Power amps: Last on; First off. Power amps: Last on; First off. Power amps: Last on; First off. Power amps: Last on; First off.  I will not write on the blackboard one hundred times: Power amps: Last on; First off.

";o )

Okay, my turn.  I plugged a speaker level output* from one amp into the output of another power amp.  Blew up all the output transistors in the second power amp. 

*or maybe that was a line output into another line output ?  Have succeeded in forgetting the details. 

“on: pre>amp off: amp>pre”

So when using 12V DC triggers to your Amps from the Pre-Amp the power on order is satisfied, but not the power off? 

This is the way I’ve had it wired for ~ 17 years. Am I risking anything for this convenience?

Thanks

@choppi2003 congrats you’ve earned your star on this one.

@dunedain might want to check with the manufacture if the logic of orders reverse during power on and power off.  If the trigger functionality is provided for preamp and amp the manufacture should already take the sequence during on and off operation into account.