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Singxer SDA-6 Pro DAC, AK4499EX, XMOS, class A balanced output stage.rnIt contains the excellent AK4499EX chip which was no longer available after the famous AKM factory fire.rnSelling because I am dismantling this system.rnIt is a pure fixed output DAC without a preamp function or remote. It comes with a UK standard mains cable and USB cable.rnI will only post to UK mainland address.rnrnReceived an excellent review in "Soundnews" (see excellent review online scoring 93/100) which summarised its strenghts as follows:rnrn Good looking unit, its built like a tank, I find it tough and solidrn... read more
This is an ambitious ask, not a deal: £699 is well above the £415 median for recent examples and comfortably beyond the £506 75th percentile. Even in excellent condition, that places it at the top end of the used market; it would need unusually complete accessories, impeccable provenance, or a particularly desirable upgraded variant to justify the premium.
The SDA-6 Pro remains a serious balanced DAC, with galvanically isolated USB, sophisticated clocking, extensive digital inputs, and a discrete Class-A analogue stage. It supports high-resolution PCM and DSD, and its clean, dynamic presentation has earned it a strong following. At this money, confirm it is the original Pro rather than the newer Pro2, check the display, remote, inputs, and XLR/RCA outputs carefully, and negotiate toward the £500 region—or wait for a better-priced example.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Guangzhou Singxer Electronic Co., Ltd., founded in 2011 in the Panyu District of Guangzhou, China, emerged from a team of seasoned audio engineers focused on addressing shortcomings in digital audio playback. Initially specializing in OEM and ODM projects, the company leveraged its expertise in XMOS processors—pioneering the xCORE-200 series—to build a foundation in high-performance audio solutions. Without notable individual founders highlighted in public records, Singxer's heritage lies in its engineering-driven ethos, quietly supporting third-party brands for over a decade before expanding its own branded lineup.
Singxer concentrates on digital audio interfaces and headphone amplification, producing standout products like USB digital bridges (e.g., the SU-6 DDC), DACs, and fully balanced headphone amplifiers such as the SA-1. Their portfolio emphasizes precision components, including fully discrete differential designs with balanced/single-ended options, prioritizing low noise floors and exceptional measurements like THD+N below -120dB.
Positioned as a mid-tier contender in the competitive Chinese hi-fi market—alongside brands like Topping and SMSL—Singxer earns praise for delivering high-end performance at accessible prices, often under $600. While less mainstream outside Head-Fi circles, its products are lauded for reliability, robust engineering, and value, appealing to discerning headphone enthusiasts seeking measurable excellence without luxury premiums.
See all Singxer listings on RADAR.
