The Marshall JCM 900 is the landmark amplifier that took the legendary JCM800 into a higher-gain era. Introduced in the early 1990s, its defining “Hi-Gain” Dual Reverb circuit used diode clipping in the preamp to deliver a thicker, more saturated distortion straight from the amp—no pedals required. This raw, aggressive tone became the backbone of grunge, punk, and hard rock. While debated by purists, its powerful, cutting voice is cemented as a classic in its own right.
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Description
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The High-Gain Pioneer: Famous “Hi-Gain” master volume circuit delivered modern saturation.
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Dual Channel: Switchable between a high-gain lead and a cleaner classic channel.
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Iconic 90s Sound: The definitive amp for grunge, punk, and alternative rock.
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Marshall Heritage: Built on the JCM legacy with classic EL34 power tubes and that unmistakable midrange punch.
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Model Variations: Commonly found as the 4100 Dual Reverb (50W/100W) and the higher-output 4500 SL-X model.
