Questyle: Introducing the Flagship Portable DAC/Headphone Amplifier 'SIGMA'
By HiFi Editorial6 November 2025
Key Highlights
The Questyle SIGMA, a flagship portable DAC/headphone amplifier, will be released on October 10th at a price of approximately ¥99,000.
The device aims to provide stationary-class sound quality on-the-go, incorporating advanced technologies and expertise under its 'Summation' philosophy.
Features include the AKM AK4493EQ DAC for precise decoding, noise reduction, and a 3-layer amplification design for authentic sound reproduction.