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Questyle Audio CMA600i Headphone Amplifier Questyle CM600i Unfortunately, it does have the famous USB problem and it doesn't work but coax/optical is working fine and headphone amp is working great (that's what I was mainly using it for). It does come with its original box, remote and power cable sorry didn't add to the pics. Condition: excellent Payment Method: EFT, Cash on Pickup etc. Region/State: (VIC) Victoria/Australia By wrx591 0 Comments AUD $650 Date: May 24, 20241 yr
The Questyle CMA600i is a respected desktop DAC/amp known for its unique Current Mode Amplification, delivering clean, powerful sound with exceptional synergy across many headphone types. At A$650, this listing is a strong bargain: the original MSRP was around A$1,950 (equivalent to US$1,299), and typical used prices hover between A$900–A$1,100 based on recent EUR and USD listings converted at current rates. This price sits well below the 25th percentile of the used market, making it an excellent opportunity for a buyer seeking high performance without the flagship cost.
What makes this unit worthwhile is its robust build in CNC aluminum, pure Class A operation, and versatile connectivity including balanced XLR and single-ended outputs with up to 1.9W per channel at 32Ω. It also functions as a preamp and supports high-res USB and S/PDIF inputs up to 32Bit/384kHz and DSD256. With “excellent” condition noted and no red flags in the listing, this is a clean buy from a well-loved product line—ideal for enthusiasts who value current-mode topography and desktop versatility.
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.
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