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A$635 is a fair ask for a working MC-100B, and if it’s clean and properly serviced it’s right in the “worth a look” zone rather than an outlier. New pricing for this model lands much higher, so used value depends mostly on condition, tube health, and whether any upgrades are documented.
The MC-100B is well liked because it’s a chunky, dual-mono-style KT88 integrated with plenty of drive, switchable triode/ultralinear modes, and a sound that can be lush yet still punchy. The upside here is that these can be very satisfying with efficient speakers, and original box/include extras help on a heavy amp like this. I’d just want confirmation of bias stability, quiet operation, and which tubes are fitted.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Yaqin is a Chinese audio brand that appears to have been founded in 1994, with its manufacturing rooted in southern China, often associated with Foshan/Shenzhen-area production. Publicly available information suggests it began as a small family-run operation and was later built out into a more formal factory brand. The company’s exact founding story is not especially well documented in English, so details beyond the 1994 origin should be treated cautiously.
The brand is best known for vacuum-tube hi-fi components, especially integrated amplifiers, power amplifiers, tube preamps, and phono stages. Models such as the MC-10L, MC-13S, MC-84L, MC-100B, and MS-23B are frequently referenced by enthusiasts. Yaqin has also claimed broader production capabilities, including transformers and related audio electronics, though its core identity is clearly centered on tube amplification rather than loudspeakers, turntables, headphones, or cables.
In the market, Yaqin sits in the value-oriented to mid-tier tube-audio segment rather than the true high-end. Its appeal is strong among listeners who want classic valve sound, straightforward serviceability, and a relatively affordable path into tubes. It is not generally regarded as a luxury boutique marque, but it has earned a reputation for delivering decent performance for the money, especially for buyers comfortable with a more traditional, component-driven approach to hi-fi.
See all Yaqin listings on RADAR.
