RADAR is a price search engine. We link to the original listing — we never sell direct. Transactions happen on the source site.
This is a buyer’s market for the Proton AM-455 right now, and US$159 looks fair to slightly strong rather than a steal. Recent used examples have landed around US$110 to US$150 in typical private-sale territory, while cleaner dealer asks can run higher, so this listing is close enough to the sweet spot if it’s genuinely healthy and presentable.
It’s worth buying because the AM-455 has a solid reputation for a warm, easygoing sound, decent phono stage, and a genuinely capable 50-watt class of power for efficient speakers. The pre-out option and dual speaker terminals add flexibility, and these older Proton integrateds are well liked for their musical, unfussy character. At this price, I’d mainly want confirmation that all inputs, controls, and the phono section are quiet and working properly.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Proton Electronic Industrial Co., Ltd. emerged from Taiwan in 1981, establishing its base in Banciao, Taipei-Hsien, as a manufacturer targeting the U.S. consumer audio market with high-quality components. Linked to Fulet Electrical, which produced notable NAD amplifiers, the brand launched around 1984 to expand into consumer electronics, including acclaimed TV monitors like the 600M and 602M models. By 2009, it remained active, building on a heritage of precision engineering from shared facilities with brands like NAD and Dynaco.
The company focused on premium hi-fi gear optimized for real-world performance, emphasizing tuners, receivers, amplifiers, and integrated systems that drove everyday loudspeakers with exceptional clarity. While not delving into headphones or cables, Proton's lineup prioritized robust playback under practical listening conditions, from radio reception to vinyl and cassette sources, earning praise for its engineering rigor in the 1980s.
Proton holds a solid reputation in vintage hi-fi circles as a mid-tier powerhouse, favored by collectors for its reliable, high-value sound that punched above its price point. Positioned as an accessible alternative to elite brands, it appeals to discerning buyers seeking durable, no-nonsense performers rather than boutique exotica, with ongoing interest in its schematics and restored units.
See all Proton listings on RADAR.
