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. 1 Available
