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At £481, this sits a bit above the median of recent GBP comparables at £374 and just over the 75th percentile at £455, so it reads as slightly ambitious rather than a clear bargain. It’s not wildly out of line, but it’s priced at the top end of the current used spread, so the upgrades need to be doing real work here to justify the premium.
That said, the TU-8500 has a strong reputation as a lively, full-featured tube preamp with a phono stage, and the Amtrans parts, upgraded pot, and vintage tubes add genuine appeal for a buyer who would have paid to spec one up anyway. If the build is clean, fully working, and the tube set is healthy, this is the sort of listing that can still make sense for someone who wants the upgraded version rather than a stock unit.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Noble Audio was founded in 2013 by audiologist Dr. John "Wizard" Moulton, a pioneering figure in custom in-ear monitors with roots tracing back to his earlier work at Heir Audio. Based in the United States, the company emerged from Moulton's expertise in audiology and IEM design, honed over years in Thailand and beyond. In 2018, his brother Jim Moulton joined as 50% owner, propelling the brand's expansion while preserving its artisan heritage in precision audio engineering.
The brand specializes in high-end in-ear monitors (IEMs), offering both custom-molded and universal-fit models renowned for multi-driver configurations, such as the groundbreaking 10-driver K-10 and flagships like the Viking Ragnar, Ronin, and Kublai Khan. Noble has diversified into true wireless earbuds (TWS), debuting the award-winning Falcon Pro in 2020, followed by the FoKus series—including the all-wood Prestige and models like Mystique, Triumph, and Apollo—blending audiophile tuning with cutting-edge wireless tech.
Positioned firmly in the high-end audiophile market, Noble commands respect for its technological innovation, award-winning sound signatures, and meticulous craftsmanship, earning multiple Headphone of the Year honors. It appeals to discerning buyers seeking reference-level portable audio, standing out as a boutique leader against mass-market competitors through superior detail retrieval and customization.
See all Noble Audio listings on RADAR.
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