Amplifiers: protect controls, handles and corners

On heads and combos, identify protruding parts first: knobs, switches, jacks, handles, feet and corner hardware.

Create clearance and protection around these areas without using knobs as bearing surfaces. For heavy equipment, the lower protective layer should support the load without collapsing quickly.

Do not treat the amplifier handle as a structural part of the shipping package; the weight should be supported by the packaging system as a whole.