Unlike the iPig/iPanda evolution, iBoo isn’t just a repackaging of the same parts into a recolored shell; it’s a strategic stripping down of the bigger and more expensive units into a smaller and lighter yet still formidable little system. iPig surprised us by including five total audio drivers—two tweeters under the ears, two midrange drivers as eyes, and one big bass driver on the bottom, a collection of speakers that produced…