Powering up amp


I know this has been discussed in past. What is the correct order of powering up/down the amp. Thanks
7671
I agree with the other posters. First on would be CD or audio source, then preamp, then power amp. Turn them off in reverse order.
While I always turn the amp on last---I get some noise/part garbled music if I turn off the amp first.--So therefore I conclude; I should turn off the pre first. I also conclude all amp circuits aren't the same.--YMMV