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I ended up using this amp primarily in home theatre bypass mode with my Anthem AVR. I hope it will go to a good home with a more deserving use case (!). Power output is 150W per channel at 8ohms and 300W per channel at 4ohms. Power supply is 800 VA Toroidal transformer with 90,000uf capacitor ban...
Timing is reasonable only if this is one of the later Ai-series pieces you want to keep long term; if a newer replacement is already on your radar, that matters more than age here. At A$1,800, it lands below the A$2,096 median and comfortably under the A$2,420 75th percentile, so this reads as a good buy rather than an ambitious ask, though it is not quite a slam-dunk bargain versus the A$1,493 25th percentile.
What makes it appealing is the usual Stello strength: a clean, high-current solid-state integrated with a reputation for control, drive, and a refined-but-not-sterile presentation that suits difficult speakers well. If the condition is genuinely good, that adds real value, because these are the sorts of amps people tend to keep rather than churn. I’d mainly check for age-related service history, original remote, and stable operation into load, but at this price the listing looks like a sensible entry into a respected, musically capable amp.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Stello is a hi-fi brand from South Korea, launched by April Music, a company founded in 1998 in Seoul. April Music, known for its skilled engineering team that includes musicians, established Stello as one of its three core lines—alongside the digital-focused Aura and power amplification-oriented Eximus—initially targeting personal audio enthusiasts. The brand debuted with the acclaimed HP100 (also known as H100) headphone amplifier and preamp, building a foundation in compact, high-quality components assembled in Korea with some enclosures sourced from California.
Stello specializes in digital audio essentials and amplification, including standout products like the CDT100 and DA100 DACs, USB DACs such as the U3, CD transports like the CDT200, and integrated amplifiers like the Ai500. Its 100 Series emphasizes lifestyle-sized designs that bridge traditional hi-fi with PC-based music playback, delivering transparent, open sound through reliable engineering. The lineup avoids speakers or turntables, focusing instead on sources, DACs, and amps that integrate seamlessly into modern setups.
Positioned as an affordable high-end contender, Stello earns praise for punching above its price with extraordinary build quality and musicality, often rivaling pricier rivals. It challenges preconceptions about Korean audio—proving South Korea's prowess beyond consumer electronics—while serving as a gateway for discerning buyers seeking value-driven performance without boutique excess. April Music's OEM work for other high-end marques underscores its technical credibility in the global market.
See all Stello listings on RADAR.
