When dealing with something heavy in a box, you don't have to lift it out. Just open the box, bend the flaps back, carefully tip the box over so its top is on the floor, and lift it up off its contents.
That is great for getting LaScala out of their boxes but they only way 120lbs my new amps weight 150lbs each, lol. They are still where the delivery guys left them, lol. They are safe in the boxes while I do the work on the house for the jubs. I'm tempted to get a friend to help lift them setting 1 amp on top of each of my Heresy as active amp risers, haha, would look good. I could burn 1 amp in on my LaScala and burn the other in on the Heresy. The amps operate as single ended class A for the first watt or so and then into push pull class A up to 40 watts. I know the LaScala are extremely smooth and detailed with my class A Yamaha B2x so this could become a serious distraction to getting the house finished.