I propose a marketing solution to end the confusion amp and speaker cabinet buyers may have when it comes to combining various pieces that works like the Garanimals children's clothing line.
Here is a description of how Garanimals works from Wikipedia.
The original clothing had small embroidered animals on the breast or bottom of tops, and on the waistband of bottoms (or sometimes on one leg above the hem for shorts.)
The intent was to allow children to pick out their own outfits by matching the same animal to a top and a bottom (the line was coordinated so that matching sets would be complementary but provide a choice of combinations.)
For example, if your amplifier has a bear, a giraffe, and a cat logo on the back, and your speaker has a dog, a zebra, and an elephant logo on it, you can easily tell that you should not use them together.