The few-dollar fix for a phone with no headphone jack.
The Conexant CX31993 USB codec paired with a MAX97220 amplifier stage: USB-C in, 3.5mm out, up to 32-bit/384kHz PCM, with TRRS mic support so in-line mics keep working. Reviewers describe the platform as clean and neutral-leaning with a quiet background.
CX31993 + MAX97220: A known-good codec with a dedicated amp stage for extra headroom.
Mic passthrough: Your IEM's in-line mic still works for calls.
Plug-and-play: No app, no driver — phones, tablets, laptops, consoles.
Who it's for
Anyone whose phone dropped the jack, and IEM owners who want a cleaner source than a laptop port.
The honest trade-offs
Output power (~63–65mW at 32Ω) suits IEMs, not demanding full-size headphones, and measured figures vary between builds of this chipset — treat the numbers as the platform's typical range.
