Cx31993 Datasheet Fix Better !!better!! «INSTANT — 2025»
The CX31993 (often branded as the CX-Pro) is a highly popular, budget-friendly USB-C DAC chip known for delivering impressive Signal-to-Noise Ratio (SNR) of -128dB and high-resolution playback up to 384kHz. However, users often encounter issues that aren't clearly addressed in official documentation, necessitating community "fixes" and setup optimizations. The "Datasheet Fix": Enhancing Performance
The Fix: Use apps like HiBy Music or USB Audio Player Pro (UAPP) and enable "Exclusive HQ USB audio access". This bypasses the Android OS audio stack, which often forces poor resampling and volume-scaling issues, allowing for bit-perfect playback directly to the DAC. 2. Clipping and Output Limitation cx31993 datasheet fix better
- Enable AVDD (3.3V) → wait 10ms
- Enable DVDD (1.8V) → wait 5ms
- De-assert RESET → wait 2ms
- Enable HP amplifier (register 0x03 bit 4)
Have you found other CX31993 datasheet gaps? Let me know—I’m maintaining a public errata. The CX31993 (often branded as the CX-Pro )
Power Output: Typically delivers 65mW (into 32Ω), which is adequate for most IEMs but may struggle with demanding over-ear headphones. Common Issues and "Better" Fixes Enable AVDD (3
EQ Adjustment: A small -2dB or -3dB dip in the 8kHz–10kHz range usually "fixes" the harshness.
: Typically >128dB (chip spec), though implementation results like the JCALLY JM6E report around 117dB. Dynamic Range (DNR) Power Output (Thrust) : Roughly 65mW (often tested at 32Ω). Distortion (THD+N) : ~0.0003% (-95dB). ADC Recording Rate : Supports up to 24-bit / 96kHz for microphone input. Common Implementation & "Fixes"
