Welcome to the Jungle features a more aggressive, higher-gain version of Slash's Les Paul through Marshall tone compared to Sweet Child O' Mine. The opening wah-filtered harmonics lead into a pummeling riff with thick distortion and tight low end. Slash used an Alesis Midiverb for the pitch-shifted intro effect.
Tom Morello's tone broken down: the JCM800 gain structure, wah-as-filter technique, Whammy settings, and how to approximate it on a modeler or pedalboard.
Two Studio-line heads. Two of the most modified Marshall preamp topologies ever shipped. Which 20-watt version belongs on your board, and which one actually sounds like the amp it claims to copy.
Both are 20-watt small-format Marshalls with the original Marshall circuits inside, but a 1959 Plexi and an 800 are different amps. Here's which Studio you actually want.