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This is a Marantz Model 1150 Integrated Amp from 1976. It came to us pretty clean but needed some electronic tweaking, which we enlisted one of our techs to perform (see last photo for invoice). Converted front panel indicator to LEDCleaned front panel controlsCleaned phono preamp PCBA edge connectorCalibrated power supply bus voltagesSet power amplifier bias and DC balanceReplaced defective transistor in phono preamp circuitNow it sounds as great as it looks, these Marantz units are solidly built and heavy and this unit is back in action. It pumps 75 watts per channel into 8Ω.3-Band EQ (Bass, Mid, Treble)Features two dedicated phono inputs for turntablesMultiple tape loops for recording and playbackSeparate pre-out and main-in connections, allowing it to function as a standalone preamp or power amp Service History: No service records were included from the prior owner. Here at the shop we did routine inspection and our tech performed the above bulleted items (see also our invoice from the tech)Cosmetic Condition: Overall we rated this at Very Good, with very few signs of wear.In the Milwaukee Area? Stop in our shop to inspect/demoSee our feedback and thank you for considering. All the gear we sell is packaged with great care for safe arrival in the condition advertised
This is priced a bit above the median, but still comfortably within the normal used market for the model; at US$1,100, it sits just above the US$997 median and well below the US$2,312 75th percentile, so it reads as fair-to-strong rather than cheap or ambitious.
The appeal here is the usual Marantz thing: a respected vintage speaker with real collector and listener interest, especially if it’s been kept original and plays cleanly. If the cabinet, drivers, and surrounds are intact and there’s no sign of repair history or imbalance between channels, this is the kind of listing that can be a solid buy for someone who values condition and provenance over chasing the absolute lowest price.
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.
