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This is a buyer’s market at US$349: it sits below the 25th percentile of the recent used comp set (US$377) and well under the median of US$405, so it reads as a solid deal rather than a fair-price listing. For a well-kept KingRex setup with the matching linear PSU, that’s especially appealing because the power supply is part of the value here, not an afterthought.
The HQ-1 is a respected little headphone amp for buyers who like a clean, compact, no-nonsense sound and the usual bonus of an external linear supply is better noise isolation and a more polished presentation. If it’s truly lighting up cleanly and includes the PSU, this is the kind of used hi-fi buy that makes sense: useful, neatly matched, and priced with room to feel good about the purchase.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Kingrex Audio, from Kingrex Technology Co., Ltd., traces its origins to Taiwan, where it was founded in 2000 as a design house and manufacturer initially focused on diverse electronics like PDA batteries, memory modules, and ODM game machines. The company soon pivoted toward PC HiFi solutions, establishing itself as a trend-leading designer for digital streaming devices in the audio realm. Based in Taipei, Kingrex embodies a heritage of innovative engineering that bridges consumer tech with high-performance sound reproduction.
The brand specializes in compact, feature-packed digital audio components, including USB DACs, integrated amplifiers like the acclaimed T20 and T20U models, preamps, linear power supplies, and specialized accessories such as the UArt USB Y-cable. These products target desktop and small-system setups, emphasizing seamless computer-to-DAC integration and clean power delivery, often defying expectations through their modest footprints.
Kingrex holds a niche boutique position in the hi-fi market, celebrated for delivering high-end sonic performance at accessible prices—described as "HiEnd but not high price." Reviewers praise its gear for musical feats that punch above its weight, appealing to discerning buyers seeking value-driven excellence in digital playback rather than luxury extravagance.
See all Kingrex Audio listings on RADAR.
