Sigma Pro

The Questyle Sigma Pro is a portable DAC and headphone amplifier featuring dual ES9069 DAC chips from ESS Technology for high-resolution audio decoding.

It incorporates Questyle's proprietary Current Mode amplification with four discrete stages, ensuring ultra-low distortion and compatibility with various headphone impedances.

The device supports PCM, DSD, and MQA decoding via an XMOS XU316 processor, including MQA-CD, making it suitable for studio monitoring.

Questyle will release the high-end portable DAC/headphone amplifier "SIGMA Pro" on November 28, with pre-orders starting November 21.

Featuring dual ESS ES9069Q DACs and TTA decoding, it achieves 25Vp-p output and supports high-impedance headphones.

Equipped with XMOS XU316 USB interface, it supports PCM 768kHz/32bit, DSD 512, MQA, and various Bluetooth codecs.

Questyle has introduced the Sigma and Sigma Pro portable DAC/amps, delivering high-resolution audio with remarkable output power in a compact design.

The Sigma Pro features dual ESS ES9069 DACs in a dual-mono configuration, supporting up to 32-bit/768kHz PCM and DSD512 audio formats.

Both models include balanced 4.4mm outputs, LDAC, Snapdragon Sound, and Bluetooth 5.4 technology, enhancing connectivity and audio quality.