Looking for a McIntosh amp that gives a great example of the “McIntosh Sound”

I guess since I have all McIntosh from the phono pre and cd player to the pre and amps to speakers, I have the McIntosh sound. For the life of me I have no idea what that is though. From my perspective it sounds fabulous. 

Have heard and had most of the old McIntosh tube amps. The MC225 is nice and people like it a lot. Not so fond of the 240.

But the old tube version of the 275? Now, I've heard one rebuilt and it is just a superb McIntosh amp. If you can get one in good condition, you'd likely be pleased to give it a try in your system. 

I'm on some rebuilt custom tube monoblocks now but that old MC-275 is really great.

MC275 a classic and great sounding can add an extra and run two mono blocks, best resale of most McIntosh gear

Is the McIntosh sound known for SS, tubes, or both?

Is the McIntosh sound known for preamp, amp, or both?

My audio purchase decisions are usually based the latest reviews and McIntosh hasn’t come to my attention as cutting edge or a sonic bargain.  However, I’m curious about the McIntosh’s company longevity with loyal fans.