What amp settings do you need for Megadeth?
It depends on the song. On a generic five-knob amp, Tornado of Souls starts at Gain 8.5, Bass 6, Middle 4, Treble 7, Presence 6, Reverb 1; Holy Wars... The Punishment Due starts at Gain 8, Bass 6, Middle 3, Treble 7, Presence 6, Reverb 1; Symphony of Destruction starts at Gain 7, Bass 5, Middle 4, Treble 7, Presence 6, Reverb 2. These are starting points, not the settings used on the records.
What gear did Megadeth use on these songs?
Tornado of Souls: 1985 Jackson Kelly, one humbucker (Marty Friedman); Not documented in these accounts. Holy Wars... The Punishment Due: Jackson King V (Mustaine), Jackson Kelly (Friedman), guitars of the era; Not documented in these accounts. Symphony of Destruction: Jackson guitars (Dave Mustaine, rhythm); Bogner or Marshall, his amps of the time. Each song page lists the sources behind its rig.
Can you get the Megadeth tone without the original gear?
Yes. What carries these sounds is the gain structure, the EQ curve, the pickup position and the order of the effects, and all four can be rebuilt on other equipment. Tonelify rewrites each starting point for the amp and guitar you own.