With FiiO IEMs, the model names indicate the type of drivers that are used in their IEMs. For IEMs that are based on dynamic drivers, the model series starts with FD.
Having already launched the entry-level FD1, and the higher-end model, the FD5, which have both come across our office, it only makes sense that FiiO would release a midrange dynamic driver-based IEM in the FD3.
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