What you want is to use heavy dense foam. Then an inner and outer box. It is not too difficult to find two boxes which can ust slide into the other.
The foam should be at least 3" thick all around the amp.
The bigger the box, the less likely the box will be tossed around. (in my experience)
Packing tape all around in all directions can strengthen a box dramatically.
Several layers of tapecrossing the centerlines in all three directions.
The foam should be at least 3" thick all around the amp.
The bigger the box, the less likely the box will be tossed around. (in my experience)
Packing tape all around in all directions can strengthen a box dramatically.
Several layers of tapecrossing the centerlines in all three directions.