Fender Rumble LT25 Owner's Manual page 7

There are two ways to adjust an amp control knob setting. A control parameter that corresponds to an actual
physical knob on the control panel can be adjusted simply by turning the physical control knob until the
desired value is reached in the DISPLAY WINDOW. In the example below, the amp model's MIDDLE setting is
adjusted by turning the physical MIDDLE control knob on the control panel:
GAIN
Alternately, select a control parameter by turning and pressing the ENCODER; its surrounding box will turn
from blue to red:
BIG RUMBLE
GAIN 7.0
BASS 5.5
MIDDLE 5.5
TREBLE 5.5
VOLUME 10.0
The control can then be adjusted by turning the ENCODER or by turning a corresponding physical control
knob on the control panel (if present*):
BIG RUMBLE
GAIN 7.0
BASS 5.5
MIDDLE 7.9
TREBLE 5.5
VOLUME 10.0
* Note that for control parameters such as VOLUME that have no corresponding physical knob
At this point, press the ENCODER or the BACK utility button (green arrow) to accept the adjusted control val-
ues. Pressing BACK returns the user to the preset contents screen; pressing the ENCODER lets the user contin-
ue making controls setting changes, and the box surrounding the control setting will return to blue. When
control setting edits are complete, press the SAVE utility button to save the changes to the preset.
BASS MIDDLE TREBLE
TREBLE 5.8
GAIN
on the control panel, this is the only method of adjustment.
BIG RUMBLE
GAIN 7.0
BASS 5.5
MIDDLE 7.9
TREBLE 5.5
VOLUME 10.0
80S ROCK
BIG RUMBLE
GAIN GAIN
VOLUME BASS
TREBLE MIDDLE
MIDDLE TREBLE
BASS VOLUME
MASTER
BIG RUMBLE
GAIN 7.0
BASS 5.5
TREBLE 5.8
MIDDLE 5.5
TREBLE 5.5
VOLUME 10.0
BASS MIDDLE TREBLE
TREBLE 5.8
5
7.0 7.3
5.5 4.1
7.9 5.5
5.5 4.5
10.0 6.4
BIG RUMBLE
GAIN 7.0
BASS 5.5
MIDDLE 7.9
TREBLE 5.5
VOLUME 10.0
MASTER