Remember: A warm DAC is a working DAC. A hot DAC is a poorly implemented one. Now you have the power to fix it. Have a CX31993 horror story or a custom cooling mod? Share your thermal readings in the comments below.
If you own an CX31993-based adapter (commonly sold by brands like Avani, Abigail, or JCALLY), you may have touched the body after 20 minutes of use and felt a concerning, near-painful heat. Is this normal? Will it damage your phone or laptop? cx31993 datasheet fix hot
But when you plug in headphones (32 Ohm or lower), or use a passive analog volume control (like a USB knob), the amplifier enters a Class A/B bias region where efficiency plummets. Remember: A warm DAC is a working DAC
By applying the , performing the Thermal Pad Mod , or simply buying an impedance adapter, you can continue enjoying 384kHz playback without burning your fingertips. Have a CX31993 horror story or a custom cooling mod
You use 8-16 Ohm IEMs at high volume for hours. In that case, buy a dongle with a discrete op-amp (e.g., the JCALLY JM20 or the Apple USB-C dongle, which runs ice cold). Conclusion: The Datasheet Doesn't Lie, But It Omitted Comfort The Conexant CX31993 is a marvel of budget audio engineering. The datasheet is technically correct that the chip is "low power"—from a silicon perspective. But the physical packaging, cheap LDOs, and lack of thermal management in $5 dongles make the user experience "hot."
The CX31993 has become a darling in the mobile audiophile world. For less than $10, this tiny USB-C DAC chip delivers surprisingly high-fidelity audio—supporting PCM up to 384kHz and DSD256. It rivals dongles costing five times as much.