iBasso UAC 1.8.5

This review examines the digital tuning capabilities of the iBasso Audio USB DC series headphone amps and decoders.

While Android 5.0 and above inherently support UAC 2.0 protocols, many smartphone manufacturers, prioritizing compatibility, implement SRC (Sample Rate Conversion) output. This often introduces external interference and increased noise floor, which can compromise high-fidelity audio quality—an unacceptable compromise for audiophiles seeking optimal sound performance.

The iBasso UAC supports 64 levels of hardware volume control, enabling more precise sound adjustments and a superior listening experience compared to typical software-based volume control.

Instructions for using the iBasso UAC App are as follows:

• 1. Install the iBasso UAC App and connect the device (DC01).
• 2. Disconnect headphones and set the system volume to maximum.
• 3. Launch the app and adjust the volume to the optimal level.
• 4. When using other applications, do not close the app in the background. To adjust volume, switch back to the app.

Note: System volume adjustments are software-based, primarily to set a maximum level that prevents system bottlenecks and provides maximum available voltage. The app controls volume via 64 hardware levels, offering a globally controllable and more stable audio experience.