Wired 3.5mm connection and 16 Ω low impedance combine with a 17–22kHz frequency response to deliver clear, portable IEM performance suitable for phones and DAPs. These CX 400‑II Precision earbuds emphasize clarity, noise isolation, and comfortable fit, but expect a wired-only experience and some variability in bass depth and unit quality for this category (chi_fi_iem).
For listeners who want clear, portable wired IEMs with good isolation and phone‑friendly drive; avoid if you need deep sub-bass or wireless convenience.
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