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

imhififan actually posted a link to a very unique hand-truck.  I actually have not seen one like this.  The problem with most hand-trucks, even if they have large pneumatic tires, is that you still have to have an enormous amount of lift to get the hand-truck up each step.

This hand-truck from northerntool has a 3-wheel rotating assembly.  Watch the video in that page.  It's worth $100.

https://www.northerntool.com/shop/tools/product_200737655_200737655?cm_mmc=Google-LIA&utm_source...

It actually looks like it's back-ordered on Northern Tool.  It's also available on ebay for $99 + $22 shipping.  Just search for "Strongway Stair Climber Hand Truck".

There are other places on the web that sell similar 3-wheel hand-trucks.

I actually have 100lb Emotiva XPR-1 amps that I move around when I rebuild them.  I use a standard hand-truck, but put a small hand-towel on the bottom plate.  Tilt the amp on so that it is on it's side and wiggle it onto the towel.  Strap the amp to the hand-truck if necessary. 

Hah, I watched those videos imhififan.  There was another video that came up just after it:

https://www.youtube.com/watch?v=wUbm1e1PdwI

The Northern tool 3-wheel type can help climb stairs, but it appears that it's harder to turn/rotate this type of hand truck.  A hand truck with big tires and sliders appears to work better overall.  An example:

https://www.amazon.com/Tyke-Supply-Aluminum-Climber-Handle/dp/B01ATY2HI4