The Fosi Audio DS2 elevates portable audio with dual Cirrus Logic CS43131 DAC chips supporting DSD256 and PCM up to 32-bit/384kHz resolution, delivering exceptional high-fidelity reproduction. Output power reaches 170mW per channel at 32 ohms across both 3.5mm single-ended and 4.4mm balanced headphone connectors, accommodating impedances from low to high without compromise. The architecture achieves extraordinary performance metrics: 1μV noise floor, 0.0001% THD, 130dB SNR, and 109dB SINAD, ensuring transparent signal integrity and minimal audible artifacts. Independent 60-step volume control with memory function provides granular gain adjustment without battery drain on your source device. Universal compatibility spans iPhone 15 series, iPad Pro, Android smartphones, and computers via USB-C, functioning seamlessly as both portable amplifier and external sound card. The precision CNC-machined aluminum chassis with shock-resistant construction reflects meticulous engineering standards. A 24-month warranty and responsive customer support complete this essential accessory for audiophiles demanding studio-grade audio quality across mobile and desktop platforms.