Mesa Dual Rectifier Rev.F Stock vs. Modded (’German Tone’)

(Jump to A/B cuts at 2:08) Mesa Dual Rectifier, revision F (stock, low serial no.) vs. Mesa Dual Rectifier, revision F (rev.C mod) in a recording setup (Mesa OS Slant cab, MJE “Hulk 990“) capturing what we call ’the German tone’ (master volume rolled back, condenser microphone, short distance miking). No EQs or any other processing.