but there are people like me, who live in nyc, and we have to lug our gear up and down stairs. a hand truck just makes it more inconvenient.
Then buy one with large diameter inflatable wheels and get a strap to secure everything to the dolly. When going up or down stairs, just stay on the top side and pull it over each step, one at a time.
I've go to the gym often, so any amps weight isn't a problem for me. Getting them to fit in my car, however, has caused me to buy and sell a few over the years. In any case, I have had to deliver refrigerators, water heaters, window AC units, and tons of other stuff that's way heavier than an amp, and haul it up several flights of stairs on many occasions. Trust me, it's MUCH easier with a good dolly! Easier still if you have two people!