The best truly tiny satellite we've ever heard is the One|Sound Model 2.2 from CDT Audio. Mounted to the wall, the two-inch mid-tweeter handled everything above 200Hz with confidence and ease--we actually thought, at first, that the surprisingly coherent sound came from larger models sitting below. To really show how small these things are, we started pulling stuff out of our pockets to indicate scale. We're guessing CDT will do well by appealing to the existing audience for the almost equally small Bose Jewel Cubes--which are sold only as part of an integrated system and thus operate at a competitive disadvantage.