Gallien-Krueger MB 800 Manual del usuario - Página 6
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INPUT
-10dB
MUTE
CLIP
1
2
3
Front Panel Features
Input: A standard ¼" input jack to connect active
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or passive basses using a shielded cable.
-10 dB Pad/Clip indicator: This is generally set
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to the down position except in cases where the
clip indicator (the ring surrounding the -10dB
switch) flashes more than occasionally. This
indicates the input is being overdriven. If the
-10dB pad is active (up position) and the clip
indicator still flashes frequently, reduce the
volume on your bass.
Mute: Set this switch to on (up) position when
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tuning or unplugging your instrument. The input
signal will be sent to the tuner output located on
the rear panel but no signal will be sent to the
speaker or XLR outputs. When the mute is
active, the ring surrounding the mute switch will
be lit red.
Gain A (push): Sets the preamp gain after the
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input stage and is used in conjunction with the
input pad to optimize the input signal level sent
through the preamp. Activated by default upon
power up and when the Gain A knob is pressed as
well as from the provided footswitch. The Gain A
knob is lit blue when active.
Gain B (push): Allows an additional preamp
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gain level to be set independent of Gain A. When
used in conjunction with the Level B control, the
desired overdrive and output volume can be set
relative to the Gain A level. Activated by
pressing the Gain B knob or by the included
footswitch. Gain B remains active and is lit blue
until Gain A is selected.
Contour: The contour control decreases the
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mid-range frequencies while boosting low and
high frequencies.
Treble: Boost and cut at 7 kHz +14 dB shelving
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type. Use this control to add or remove edge and
definition.
Hi-Mid: Boost and cut at 1 kHz +6 dB. A "Q
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Optimized," band pass type, this works on lower
MB 800
GAIN A
GAIN B
CONTOUR
TREBLE
PUSH A
PUSH B
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5
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HI-MID
LO-MID
BASS
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string harmonics and effects the punch of your
sound.
Lo-Mid: Boost and cut at 250Hz +6dB/-10 dB. A
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"Q optimized" band pass type, this works for the
main body of your sound.
Bass: Boost and cut a 60Hz +10 dB, shelving
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type. This is used to control the low end push.
Level B: Activated and is lit blue in conjunction
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with Gain B. Sets the volume when Gain B is
selected.
Master (push): Controls the overall output of the
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MB800. In addition, pushing the master knob
engages/disengages the limiter function. Upon
powering up the amplifier, the Master knob
indicator is lit blue indicating the limiter is
engaged. When the master knob is pushed the
limiter function is disengaged and the knob
indicator changes to white. If power amp
clipping occurs, the knob indicator will flash red
indicating that the limiter function should be
engaged. The limiter function prevents the power
amp from distorting and is recommended during
high volume applications.
Limiter (Master knob pushed/engaged): When
this button is engaged it prevents the power amp
from distorting. It is recommended that this
feature is used for during high volume
applications.
Power Switch: Turns the amplifier on and off. In
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the on position, the ring surrounding the button
will light red during power up then changes to
blue, indicating the amp is ready for normal
operation. Should the amp experience a fault
(over heat or over current) the amp will mute and
the ring will light red until the condition is
corrected. This LED turns off when the power is
switched off. This turns the amp off but it does
not completely disconnect the power from the
AC mains.
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POWER
LEVEL-B
MASTER
OFF
ON
PUSH LIM
MB 800
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