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Specifications:
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50 WPC into 8 ohms is enough for many listening situations—good for casual / vintage listening, FM/AM radio, modest speaker loads.
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Straightforward functionality: tuner + amplifier + speaker output in one unit; classic vintage feel.
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Because it's vintage, likely to have build‑quality traits (e.g. solid transformer, discrete components) that many audiophiles like.
Repair:
1 Replacement Power Cord
6 replacement Capacitors
#298
Cleaned controls
Cleaned switches
Soldered Circuit Board
*Need a remote for this unit
At USD199 for a used Proton AV-4445 tuner, the asking price feels ambitious compared to typical vintage Proton tuners, which often trade in the USD100-150 range for solid examples—especially since this mid-90s model with 50WPC receiver-like specs doesn't command premium collector status. Fair if it's pristine with original box and remote, but you'd be wise to negotiate down unless it's fully serviced.
Buyers should verify the FM frontend and tuning mechanism, as these can drift or fail from capacitor age in 30-year-old units—test all bands for clean reception and stereo separation. Confirm the included remote, manual, and antenna are present, and probe the seller on service history to dodge recap surprises down the line.
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.
