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Vintage Marantz Model 140 Stereo Power Amplifier - 75 Watt Per Channel AmpFully tested and 100% functional; the Marantz 140 has the looks, the sound and wattage to be the power source for most any home stereo set up. Cosmetically, it exhibits some wear from over the years but is overall very good.Note, the meters require a higher volume or input signal to move significantly. This is normal operation for this model.SpecificationsPower output: 75 watts per channel into 8Ω (stereo)Frequency response: 20Hz to 20kHzTotal harmonic distortion: 0.2%Damping factor: 30Input sensitivity: 1.5VSignal to noise ratio: 98dBSpeaker load impedance: 8Ω (minimum)Dimensions: 119 x 353 x 269mm
US$698 is a solid buy: it sits below the US$898 median and comfortably under the US$612–US$2,000 spread’s upper-middle territory for recent comps. It is not a steal at the very bottom of the market, but it is priced attractively enough to feel like a fair-to-good opportunity rather than a stretch.
The Model 6-G is the kind of vintage Marantz piece that draws interest from collectors and classic hi-fi listeners alike, so value holds up well when the unit is clean and original. At this price, a buyer should mainly confirm cosmetic honesty, driver health, and whether any originality details matter to them, but there is no obvious price red flag here if it’s complete and working.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Marantz originated in the United States, founded in 1953 by Saul Bernard Marantz, a music enthusiast and amateur musician born in Brooklyn in 1911. Dissatisfied with the audio equipment of the era, he crafted the groundbreaking Audio Consolette preamplifier in 1952 from his New York home, selling the first 100 units rapidly and prompting the formal establishment of the company in Woodside, Queens. Though production later shifted to Japan in partnership with manufacturers like Standard Radio in 1966, and the brand evolved through ownership changes including Superscope and eventual integration into larger groups, its heritage remains rooted in American ingenuity and a relentless pursuit of musical fidelity.
The brand excels in high-end audio components, particularly amplifiers, preamplifiers, and integrated systems that defined its golden era. Iconic models like the Model 7 preamplifier (1958), Model 9 power amplifier (1960), and Model 10B tuner (1964) set benchmarks for performance, while later offerings expanded to tuners, receivers, and CD players. Marantz briefly ventured into speakers under designer Ed May in the 1970s but focused primarily on electronics rather than turntables, headphones, DACs, or cables, emphasizing separates renowned for their "Most Musical Sound."
Marantz commands a premium position in the hi-fi market, revered as a high-end pioneer that shaped the audiophile landscape through the 1970s zenith. Today, it blends vintage allure with modern elegance, appealing to discerning buyers who value durability, innovation, and warm, detailed sound signatures over mass-market accessibility.
See all Marantz listings on RADAR.
