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At US$595 for a three-tube trio, this asking price is ambitiously high compared to the typical used market, sitting well above the 75th percentile of US$341 and nearly double the median of US$165. While single early 1958 Holland-made Amperex 12AX7s can command US$300–US$600 individually, the three-pack should logically fall closer to US$500–US$600 only if each is pristine NOS; however, the current listing price exceeds the realistic aggregate value for a standard used set, making it a tough buy unless the tubes are verified perfect original-owner condition with matching date codes.
The Amperex 12AX7 “Long Plates” with D-foil getter and large grey plates from Heerlen, Holland (1950–1956) is well-regarded for its rich, smooth high-end and strong midrange presence, often favored in vintage hi-fi preamps and guitar amps for its musicality. The timing matters here: as these 1958 tubes are among the last of the rare Holland Long Plates run, their scarcity is a genuine upside, but only if the three are confirmed NOS and original-owner; without that verification, the price remains unjustified.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Amperex Electronic emerged in the mid-20th century as a pivotal player in the vacuum tube industry, originally established in Brooklyn, New York, at 79 Washington Street as a manufacturer of transmitting tubes. Around 1955, the Dutch firm Philips acquired it, expanding operations and relocating to a new facility in Hicksville, New York, in 1953, which served as headquarters for North American Philips until its closure in 1989. Under Philips, Amperex bridged the era of tube dominance to the transistor age, distributing high-quality miniature tubes to fuel America's postwar hi-fi boom.
The brand specialized in vacuum tubes, particularly receiving types like the 12AX7, 12AU7, and 12AT7, which powered amplifiers from iconic marques such as Marantz, Fisher, and H.H. Scott. Amperex's crowning achievement was the 1958 6DJ8 (also known as ECC88), initially developed for video and radar applications but revered in audio for its high transconductance. Variants like the 6922 and 7308 frame-grid tubes, including the "Bugle Boy" series and later map-etched models, offered exceptional noise rejection, balanced tonality, and soundstaging.
Today, Amperex holds vintage-collector status among audiophiles, prized for its "sweet and airy yet full and solid" sound that endures in tube rolling and restoration projects. No longer in production, its tubes command premium prices in the niche market for golden-era hi-fi components, embodying the craftsmanship of a bygone analog pinnacle.
See all Amperex listings on RADAR.
