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New at US$875, this sits a little above the recent median of US$799 and just over the 75th percentile of US$868, so it reads as a mildly ambitious ask rather than a steal. It’s not outlandish for a desirable vintage Proton piece, but it’s priced for a clean, working example rather than a bargain hunter’s win.
The AA-1150 has a strong reputation for sounding bigger and more authoritative than its rated output suggests, with a lively, full presentation and solid build that keeps it on many shortlists. If this one is truly clean and original, the appeal is real; at this price, the deciding factors are condition, service history, and whether any caps, switches, or meter issues have already been addressed.
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.
