Audirect Atom4 / Atom 4

Discrete DAC Implementation with Dual Op-Amps

Equipped with the ESS9281AC PRO decoding chip and dual RT6863C high-current operational amplifiers, the ATOM4 delivers exceptional output power. It supports PCM decoding up to 32-bit/768kHz, ensuring a pristine Hi-Fi audio experience with unparalleled clarity and precision.

Dual Headphone Outputs: 3.5mm and 4.4mm

The ATOM4 features both 3.5mm single-ended and 4.4mm balanced outputs, providing versatile compatibility with a wide range of headphones and professional audio equipment. This design caters to diverse listening preferences and expands usability.

Optimized Power Domain Separation

The device's circuit board is meticulously engineered with discrete analog and digital power domains. With dedicated optimization of the DAC, signal, and power layers, it achieves uncompromising audio performance and precision.

Compact, Portable Design

Weighing only 19g and constructed with a durable metal exterior, the ATOM4 is ultra-portable and robust. Its minimalist design makes it the perfect companion for audiophiles on the go.

USB-C Plug-and-Play Convenience

The ATOM4 is compatible with most USB-C devices, including smartphones, tablets, and computers. Its plug-and-play functionality ensures seamless, high-quality audio playback without the need for additional drivers.

Specification:

Model: ATOM4
DAC Chip: ESS9281AC PRO
Op-Amps: RT6863C × 2
Audio Input: USB-C
Audio Outputs: 3.5mm Single-Ended, 4.4mm Balanced
4.4mm Balanced Output: True Balanced, up to 4.2Vrms
3.5mm SE Output: Up to 2Vrms
Output Power (32Ω): ≥137mW (Balanced), ≥126mW (SE)
Output Power (600Ω): ≥29mW (Balanced), ≥7mW (SE)