How to physically move large heavy 100lb amplifiers easily (up and downstairs)

I have similar problems moving equipment from my lab to my music room. Forty pounds with a dolly is my absolute limit. For the 90 pound platter and 100 pound speakers, ALWAYS use movers. ALWAYS.

There's something called a "laddervator". I've seen roofers use them, and the Dutch use them when moving. I've never seen them used inside one's home, but perhaps their are smaller ones one can rent:
https://www.sunbeltrentals.com/equipment/detail/1207/0440215/ladder-platform-shingle-hoist/
 

With absolute caution. I was moving 150lb Pass monos last week and a heatsink sliced a nice 5” gash in my leg.

If going downstairs, why not take a page out of the courier company’s handbook, .....just push and watch it tumble down the stairs. 

@au_lait, Why oh why do some manufacturers make sharp heat sinks, especially when they are so large and heat producing that they often need to be stored on exposed stands?