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US$50 is a solid buy for a PO100 if it’s complete and working; used comps for the PO100/PO100 Pro family generally land around the high-US$30s to mid-US$50s, with the Pro often seen near the US$55–US$70 zone, so this sits close to fair value and below the pricier end of the market.
What makes it worthwhile is simple: the PO100 is a compact USB digital interface that does its job cleanly, and the line has a good reputation for sound quality and low-noise digital output relative to the money. At this price, I’d mainly want to confirm it powers up, the USB input is solid, and any original cable or box is included; if it’s a clean, one-owner unit, it’s an easy enthusiast-friendly pickup rather than a speculative buy.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
SMSL, founded in 2009 as Foshan ShuangMuSanLin Technology Co., Ltd. in Shenzhen, China, emerged from the country's burgeoning tech hub to specialize in digital audio innovation. The company quickly expanded with a Hong Kong branch, VMV Technology, in 2013, targeting higher-end exports and establishing a global footprint across more than 30 countries. Its early focus on domestic sales laid a solid foundation, evolving into a recognized name in affordable hi-fi.
The brand excels in digital-to-analog converters (DACs), headphone amplifiers, and power amplifiers, delivering high-performance components like the iconic Sanskrit series—featuring DACs, preamp-capable headphone amps, and linear power supplies. SMSL emphasizes in-house R&D for stylish, well-built devices incorporating premium technologies such as THX AAA-888 amplification, prioritizing audio fidelity without unnecessary frills.
Positioned as a mid-tier leader in the value-driven hi-fi market, SMSL earns praise for punching above its weight, offering audiophile-grade sound at accessible prices that rival pricier competitors. Popular among discerning buyers seeking reliability and transparency, it stands out for meticulous component selection, though some note occasional quality concerns with budget imports. For the knowledgeable enthusiast, SMSL represents smart, modern Chinese engineering at its finest.
See all SMSL listings on RADAR.
