Pretty Much... Wood pallets weren't feasible and added too much weight...They used a cardboard box bottom lined with 2" Styrofoam lining that the speakers sat on.Then a cardboard top that slid down into the Cardboard bottom.Surrounded by more Styrofoam (inside of box) and held together with 1/2" plastic straps.. IIRC
Just like washing machine/dryers today....
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