starting equiment that ic cold from being shipped

Better safe than sorry.

Don’t know if this will be usable info being that my experience has involved MUCH less expensive amps and temps that were generally in the high 20s at their coldest (coastal TX) but I’ve run a 100 w/ch receiver for 10 yrs plus out in a metal shed in all weather extremes common to my area with nary a hiccup.  FWIW…

Think about car audio components.

That's a good point but both Krell and other google responses made me doubt the safety of turning on ice cold equipment.  Condensation could take out boards say some google posts.  It's amazing how cold it stayed the last time.  After 12 hours the amplifier still felt like a block of ice in my living room.

I have always allowed my equipment to warm up before using it.

Unless your home is a swamp, I can't see how condensation would be an issue. Most homes in the cold air of winter have low humidity.

B