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MGP-1A Advanced Modeling Guide
Graphic Series
GRO50, GRO100 (“Pics Only”)
These vintage Orange amps represent the classic Orange tone. They are unique in a couple of ways. One
is the “F.A.C. Control” which functions as a switch-able bass roll off, and the other is the unique James
tone stack which is very flexible 2-knob EQ circuit.
The James stack never had a midrange control, so set it at maximum for the authentic James response.
To simulate the F.A.C. Control, use the Bright and Deep switches in combination. In our model with the
Deep switch on, the Bright switch off is the equivalent of the F.A.C. set at 2 and the Bright switch on is
the equivalent of the F.A.C. set to 4. With the Deep switch off, you can simulate the tone of the F.A.C. at 3
with the Bright switch off and 5 with the Bright switch on.
Power
Tubes
: EL-34, Push Pull
Speaker
Cabinet
: 2 x 12” or 4 x 12” oversized cabinet with Celestion Greenbacks
Crunch
UK800
Mod
Deep
Bright
EQ
Shift
Alt
EQ(-)
Citrus
Cali
Crunch
Mid
Bass
Treble
Volume
AD-30
Power
Tubes
: Cathode Biased EL-84, Push Pull
Speaker
Cabinet
: 2 x 12” Celestion V30
Normal
Bass
Mid
Bright
Treble
Volume
Clean
UK
Vintage
US
Vintage
Class
A
Input
Mod
EQ
Shift
Alt
EQ(+)
Orange
Orange
®
AD Series (cont.)
OR80, OR120 (“Pics and Text”)
Crunch
UK800
Mod
Deep
Bright
EQ
Shift
Alt
EQ(-)
Citrus
Cali
Crunch
Mid
Bass
Treble
Volume
This model is nearly the same as the GRO series above, but with more gain to the power section and
different EQ voicing. Turn EQ Shift off and drive the power section a bit harder if you have a power amp or
power amp simulator.
Power
Tubes
: EL34, Push Pull
Speaker
Cabinet
: 2 x 12” or 4 x 12” oversized cabinet with Celestion Greenbacks