As a guitarist, I have often struggled to find a power strip with widely-spaced outlets. It seems no power strip has several outlets that will accommodate large power supplies.
After failing to find a spacious power strip on a trip to the local home-improvement store, I left with the following concoction.
It works perfectly. 13 outlets, all of which can accommodate a "wall wart." Cost was about $11 for the four orange adapters, and $11 for the yellow piece in the middle. The orange pieces were glued together with silicone to keep them from coming apart.