Most of their amps do have the autoformers, but there are exceptions. One was the MC2002 (200 wpc solid-state) and the one I own, the MC7200 (also 200 wpc). And as stated before, their multi-channel amps don't have them.
Having owned many Mac amps, with the exception of the newest models, I personally don't care for the autoformers. That's just my opinion. I also find it curious that other high-end manufacturers don't use them. It's a carry-over from the old tube days. It's been a good selling feature for Mac. I'm hopeing my MC7200 hangs in for many more years!