MARANTZ SM 11 Stereo Power Amplifier Vintage 1984 Hi End 200+200 W RMS Good Look
MARANTZ SM 11 Stereo Power Amplifier Vintage 1984 Hi End 200+200 W RMS Good Look
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Marantz SM11 Stereo Power Amplifier Multivoltage 110 120 220 240V High End Audio
This listing features the Marantz SM-11, one of the most refined and powerful stereo power amplifiers from the golden age of Japanese high-end audio. The SM-11 is known for its exceptional build quality, strong current delivery, and elegant vintage design.
The unit offered here is the highly desirable multivoltage version, supporting 110V, 120V, 220V and 240V operation. This configuration allows worldwide use without the need for external transformers, making it ideal for international audiophiles and collectors.
The Marantz SM-11 delivers an impressive 200 watts per channel into 8 ohms and up to 300 watts per channel into 4 ohms, maintaining full bandwidth from 20 Hz to 20 kHz. It is capable of driving demanding speakers, including low-impedance designs, with authority and stability.
Internally, the amplifier employs a high-current output stage using multiple Darlington transistors arranged in parallel. This provides exceptional control, fast transient response, and very low distortion even at high output levels.
Its wide frequency response extends from 10 Hz to 100 kHz, offering excellent detail retrieval and a natural, open sound signature. The extremely low THD figure, rated below 0.008%, ensures clean and transparent amplification across the entire audio spectrum.
The SM-11 also features a high signal-to-noise ratio of up to 120 dB, providing a silent background ideal for high-resolution listening environments. Sensitivity is rated at 1.5V with a 22kΩ input impedance, compatible with most premium preamplifiers.
A large illuminated power meter dominates the front panel, offering real-time peak indication with selectable peak-hold mode. This visual element, combined with the iconic Marantz golden-era design, makes the SM-11 both a functional tool and a collectible display piece.
The amplifier’s construction is exceptionally robust, featuring a large power transformer, audio-grade filter capacitors, and a reinforced chassis to minimize vibration. The build quality reflects Marantz’s top-tier engineering philosophy of the 1980s.
On the rear panel, the speaker terminals support cables for loads between 3 and 16 ohms. The amplifier also includes a remote AC trigger connection, allowing controlled power-on when used with compatible Marantz preamplifiers.
This multivoltage version is particularly valuable in the global market, as it can be used safely in any country without modification. It is ideal for collectors, studios, dedicated listening rooms, and premium hi-fi setups.
The Marantz SM-11 remains one of the brand’s most respected vintage power amplifiers, combining strength, refinement, and classic Japanese engineering. It is a rare opportunity to acquire a fully capable high-end model with universal voltage support.
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