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US$55 looks like a solid buy, sitting below the typical new price of about US$99–US$109 and close to the used US$50 asking that was already called fair-to-good. For a niche accessory like this, that’s the right neighborhood: not a steal, but clearly reasonable if it’s complete and working properly.
The HS02 is well regarded because it can break ground-loop noise and clean up USB power in systems that actually need isolation, especially with sensitive DAC chains. If the listing includes the original cable(s) and shows clean, lightly used ownership, that adds real value; the main thing to confirm is that both ports and power isolation are functioning as intended, since the upside here is system-specific rather than universal.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Topping Audio, founded in 2008 in China, emerged from a team of dedicated audio engineers committed to democratizing high-fidelity sound. Without a single prominent founder in the spotlight, the brand quickly distinguished itself through rigorous innovation, amassing over 20 patents and pioneering technologies in digital audio processing. This heritage of independent R&D, backed by more than 30 experienced engineers, has positioned Topping as a global Hi-Fi contender focused on precision and accessibility.
The company specializes in desktop and portable audio gear, excelling in digital-to-analog converters (DACs), headphone amplifiers, and power amplifiers. Flagship models like the D90 DAC showcase cutting-edge components, such as the AKM AK4499EQ chip, delivering studio-grade performance. Topping also offers audio interfaces and, under its TOPPING Professional sub-brand, pro-level solutions for demanding studio environments, all emphasizing meticulous testing for reliability and sonic purity.
In the competitive hi-fi market, Topping occupies a mid-tier niche as an audiophile favorite, renowned for punching above its weight with exceptional value. Praised for build quality, intuitive design, and uncompromising transparency at affordable prices, it rivals pricier brands while earning loyal followings on forums and among desktop enthusiasts seeking high-end results without premium markups.
See all Topping Audio listings on RADAR.
