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The Marantz Model 15 Solid State Stereo Power Amplifier is a classic vintage high-fidelity power amplifier released around 1965–1968 and designed by Sid Smith. This came to me from the original owner as part of a vintage audio collection. This has been cleaned and fully tested. Just ran this for many hours without any issues. Looks and sounds fantastic! Usual age related scratches, dings, scuffs, little scratches on front (see Pic). Key Specifications • Power Output: 60 watts per channel into 8Ω (stereo), ~70 watts into 4Ω, and ~40 watts into 16Ω. • Frequency Response: 10 Hz to 60 kHz. • Total Harmonic Distortion (THD): < 0.1%. • Damping Factor: > 150 (or > 30 depending on measurement standard). • Signal-to-Noise Ratio (SNR): 90 dB. • Input Sensitivity: 1 V. • Weight: Approximately 13.6 kg to 15.4 kg (around 34 lbs)
Recent comparable Marantz Model 6-G listings center at US$997, with the middle half running from US$698 to US$1,955. At US$1,100, this is a fair price—slightly above median, but nowhere near ambitious—assuming the listing is for a complete, working pair rather than a single cabinet.
These are well-regarded vintage two-way bass-reflex speakers with unusually easy, relaxed presentation: generous bass, non-fatiguing highs, and enough efficiency to suit modest tube or solid-state amplifiers. The 10-inch woofers and simple crossover also make them appealing to enthusiasts who enjoy maintainable vintage designs. The unknown condition is the real variable: confirm both woofers and tweeters work, inspect the surrounds and cabinets, and check whether the original foam grilles have deteriorated. If performance is verified and the pair is cosmetically sound, US$1,100 is a sensible buy.
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.
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