Questyle Sigma

The Questyle SIGMA is a premium portable DAC and headphone amplifier that brings desktop-grade sound quality to your pocket. Powered by Questyle’s patented Current Mode Amplification and an AKM AK4493 DAC, it delivers ultra-low distortion, wide dynamic range, and true Hi-Fi performance with support for PCM up to 768kHz. Designed for flexibility, SIGMA features 3.5mm single-ended, 4.4mm balanced, and line outputs, making it ideal for IEMs, full-size headphones, active monitors, or traditional Hi-Fi systems. Alongside its wired capabilities, the SIGMA also supports Bluetooth 5.4 with LDAC, aptX HD, aptX Adaptive, AAC, and SBC codecs — perfect for enjoying high-quality wireless streaming when convenience matters. With Apple MFi, Qualcomm Snapdragon Sound, and Sony LDAC certification, it ensures seamless compatibility across iOS, Android, macOS, Windows, and HarmonyOS devices. Housed in precision CNC-machined aluminum with Corning Gorilla Glass, the SIGMA combines robust build quality with refined aesthetics. Its 4300mAh battery and intelligent energy management deliver long-lasting playback, while dual USB-C ports allow simultaneous charging and listening. Whether at home, in the studio, or on the move, the Questyle SIGMA offers audiophiles and professionals uncompromised sound with the bonus of high-quality Bluetooth connectivity. Questyle Sigma