Uploaded January 2024 | Updated September 2026, 6 days ago

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I'm comparing how much you can get out of the standard Marshall JMP 50W Lead (model no 1987) to dito for the hotter Marshall JMP Master Volume 50W (model no 2204).
Gear used in the video:
1973 Marshall JMP 50W lead model no 1987
1977 Marshall JMP Masetr Volume 50W no 2204
1971 Marshall model 1960A 4x12 with G12M25 75Hz Celestion Pulsonic Greenbacks
2008 Gibson Les Paul R9
2xSM57 Close mics
2xBeta57a room and hallway mics

This is how the circuits differ; (100W versions here)
youtube.com/watch?v=SU69O839D8U