What is turn on/off sequence of amp and pre-amp?

@g_nakamoto - if your amp is plugged into the ’Switched’ outlet of your preamp, you ’potentially could’ damage the amp. You didn’t specify if your Mcs ( great choice BTW) are tube or solid-state. Solid State is a little more forgiving then tubes are. Plus I am fairly certain that the McIntosh have fuses installed so the worst thing that can happen is to blow a fuse on a high enough signal transient. And a $0.99 fuse is a heck of a lot cheaper then a $500.00 repair bill for your amp.
What I would recommend is to have the preamp/amp on separate outlets. Power on the preamp, wait a few moments (or minutes of you have tube gear) before powering on the power amp.

superultramega,

I generally leave the standby switch (Rogue Pharaoh) in the on or ready position all the time. I only switch it off If I am going to leave my system off for an extended period of time such as going away for a several week vacation. So to answer your question, I have it on when powering the system on or off.

Hi,
turn on sources first then praemp and finally power amp.
Turn off first power amp (wait for relays) then sources and finally preamp.

@g_nakamoto
The original post is pretty old but since your question is more recent, I’ll put in my 2 cents . I am presuming you are referring to the use of a 12V trigger between your MX132 and your MC602 you mentioned in a previous post. I have always used this option between my amps and preamps if it is available and have never had any issue. This might sound naive but I wouldn’t expect the manufacturers to provide this arrangement if there was a reasonable chance of damaging your equipment using it.
Despite various muting circuits that might be implemented to eliminate noise during start up or shut down, I do agree it’s a good practice to turn the volume down to zero before powering off.