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About the SM-11S1
The Marantz SM-11S1 is a high-end stereo power amplifier manufactured by Marantz between 2007 and 2010 in Japan. It features a solid-state design with a symmetrical Parallel Line Layout to minimize noise and improve circuit performance. The amplifier delivers 110 watts per channel into 8 ohms and 220 watts into 4 ohms, with a bridged mono mode output of 420 watts at 8 ohms. It offers both balanced (XLR) and unbalanced (RCA) inputs, two pairs of speaker binding posts, and a frequency response from 5 Hz to 120 kHz. The unit weighs 26.6 kg (58.6 lbs) and measures 440 x 168 x 429 mm. It is noted for its low distortion (<0.01%), high signal-to-noise ratio (>101 dB), and a damping factor of 110. The amplifier supports mono bridging and adjustable gain, and is housed in a robust chassis with a toroidal transformer and aluminum heat sinks. It is designed for audiophiles seeking transparent, detailed sound with excellent microdynamic control and speed. The SM-11S1 is part of Marantz's Reference Series and was
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