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“Most mainstream earbuds and headphones have a single driver per ear that has to reproduce every frequency from the lowest bass to the highest treble. Two if you're lucky. The Chimeras have nine. It's a "quad-brid" design, meaning they use four different types of audio delivery in a single IEM: a dynamic driver for bass and lower mids; a dual-diaphragm balanced armature (BA) for midrange clarity and two more for the high end; four electrostatic tweeters to add high-end air and spaciousness; and bone conduction for extra bass.”