The tone that invented heavy metal. Tony Iommi's SG through a cranked Laney produces a thick, grinding, dark distortion that is the foundation of doom and heavy metal. The Rangemaster treble booster pushes the Laney into heavy saturation while maintaining note definition. Iommi's prosthetic fingertips and light string gauge contribute to a slightly looser, more aggressive attack.
The Celestion V30 and the Mesa Dual Rectifier were made for each other, up to a point. Here's the frequency reason the pairing works, exactly where it breaks down for ultra-high-gain playing, and what to put in the cab instead.
The JCM900 was supposed to modernize the JCM800. Here's what actually changed in the circuit, why players have opinions about it, and which one fits your playing.
Exact settings for the Marshall JCM800 across blues, classic rock, hard rock, and metal, on the real amp and on Helix, Quad Cortex, and Katana models.