While the CX31993 is excellent for IEMs, it often struggles with high-impedance headphones (e.g., 150Ω to 300Ω). Audio Expansion Card - CX31993 Datasheet
Some dongles exhibit a delay where the first 0.5 seconds of a song are silent or fade in gradually.
The has become a legendary chip in the budget audiophile community, powering popular USB-C DAC dongles like the Abigail and JCALLY JM6 . However, finding an official, high-quality CX31993 datasheet is notoriously difficult, as the documentation is often restricted to original equipment manufacturers (OEMs). Cx31993 Datasheet Fix
Users often encounter technical quirks that aren't explained in standard product manuals. Below are the most common "fixes" for CX31993-based devices.
This is a power-saving feature hardcoded into some firmware versions. To minimize this, ensure your music player is set to "keep the USB device active" between tracks, a setting available in advanced audiophile apps. 3. Power Drive Limitations While the CX31993 is excellent for IEMs, it
Use a bit-perfect player like the HiBy Music Player or USB Audio Player PRO . Enabling "Exclusive HQ USB Audio Access" bypasses the standard Android audio driver, which often introduces the noise. 2. Fade-In or "Ramp-Up" Effect
Many users report a faint hiss, especially with sensitive In-Ear Monitors (IEMs) . This is a power-saving feature hardcoded into some
Despite the lack of a public PDF, community testing and manufacturer listings provide a clear picture of the chip's capabilities: Up to 32-bit / 384kHz PCM.
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