RADAR is a price search engine. We link to the original listing — we never sell direct. Transactions happen on the source site.
This US$191 asking price is a strong deal, sitting well below the 25th percentile of US$119 for recent comparable used Questyle M18i listings and representing roughly 45% off the current US$349–US$399 retail range. At this level, you are paying significantly less than the typical used market median of US$160, making it an exceptional value for a flagship portable DAC/amp.
The M18i is highly regarded for Questyle’s patented Current Mode Amplification, which delivers a dead-silent background and precise, natural sound even with sensitive IEMs. Its dual ESS ES9219Q DAC chips in mono configuration ensure excellent channel separation, while Bluetooth 5.4 with Snapdragon Sound and LDAC support make it a versatile audio Swiss army knife for both mobile and desktop use. The dual USB-C ports let you listen while charging, a rare and practical feature. If the unit is in original-owner condition with the case and cables included, this is a clear buying opportunity with meaningful upside.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Questyle Audio emerged in December 2012 from Shenzhen, China, founded by Jason Wong, an innovator whose university experiments in 2006 sparked the company's signature Current Mode Amplification (CMA) technology. This patented approach, filed globally just 18 months after launch, revolutionized amplifier design by adapting current amplification from high-speed communications to audio, prioritizing lossless, high-fidelity playback. Rooted in China's tech hub and manufactured by Foxconn, Questyle quickly built a global footprint through relentless R&D focused on overcoming environmental and technical barriers to pure sound.
The brand specializes in premium digital-to-analog converters (DACs), headphone amplifiers, and integrated desktop solutions, with standout portable dongles like the M12 and M15 embodying CMA alongside ESS flagship chips for PCM 384kHz/32-bit, DSD256, and MQA decoding. Their lineup emphasizes minimalist elegance, from compact mobile amps to robust desktop DAC/headphone amps like the Q192, delivering effortless, high-resolution performance without gimmicks.
Questyle holds a confident position in the high-end portable and desktop hi-fi market, earning acclaim as a premium challenger to established names through superior build, explosive detail, and V-shaped dynamics. Audiophiles praise its trouble-free excellence and technological edge, cementing its reputation among discerning buyers seeking innovative, no-compromise audio gear.
See all Questyle Audio listings on RADAR.
