Correct turn on, turn off sequence????

O.K. I have been into audio for about 10 years now and still don't have a definitive answer to this question. In what order should I power up/down. I always get a pop in my speaker when I turn off my amps. I have adcom 565 monos, 565 pre, rega cdp, all plugged into a power conditioner... If any of that matters. Thanks in advance for your help.