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MGP-1A Advanced Modeling Guide
Marshall
Marshall
®
“Plexi” (Model 1987)
Normal
Bass
Mid
Bright
Treble
Volume
Clean
UK
Vintage
US
Vintage
Class
A
Input
Mod
EQ
Shift
Alt
EQ(+)
The “Plexi” is voiced brighter than the late JTM-45’s with more gain and the Super Lead tone stack.
These amps also switched to the classic Celestion Greenback.
Power
Tubes
: EL34, Push Pull
Speaker
Cabinet
: 4 x 12” Celestion Greenback
JMP Series
1959 JMP Super Lead
These amplifiers are very similar to the late JTM-45 amps but have a modified tone stack. Versions
depending on era and region came equipped with KT66, EL34 or 6550 output tubes.
Power
Tubes
: KT66, EL34 or 6550, Push Pull
Speaker
Cabinet
: 4 x 12” Celestion AlNiCo G12 or Greenback
Normal
Bass
Mid
Bright
Treble
Volume
Clean
UK
Vintage
US
Vintage
Class
A
Input
Mod
EQ
Shift
Alt
EQ(+)
Crunch
UK800
Mod
Deep
Bright
EQ
Shift
Alt
EQ(-)
Citrus
Cali
Crunch
Mid
Bass
Treble
Volume
JCM800
JCM800 ( Model 2203/2204) Hi Input
The JCM800 is arguably the first ‘real’ Marshall as it is only based on Marshall circuitry. This amp used
EL-34 power tubes, but models shipped to the USA had 6550s. 2204 is a 50W version, the 2203 is
100W.
Power
Tubes
: EL34 or 6550, Push Pull
Speaker
Cabinet
: 4 x 12” Celestion G12T-75 (1960x), V30 (1960xV), G12-80 or G12H-100 (1982x)