Front Panel Controls; Front Panel Features - Gallien-Krueger MB 500 Owner's Manual

INPUT
-10dB MUTE
OFF OFF
ON ON
CLIP
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Front Panel Features

Input: A standard ¼" input jack to connect
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active or passive basses using a shielded cord.
-10 dB Pad/Clip indicator: Input attenuator
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button. This button is generally set to the out
position except in cases where the clip LED
flashes more than occasionally. It may be
necessary to "pad" the input if you are using a
bass with active electronics or very high output.
The pad button light flashes red when the input is
being overdriven. If the -10dB is pressed and the
clip indicator still flashes frequently, reduce the
volume on your bass.
Mute: Set this switch to "on" when tuning or
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unplugging your bass. No signal will be sent to
the speakers or the P.A. system. When muted this
button turns red.
Gain: Sets the preamp gain after the input stage.
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It is used in conjunction with the input pad to
optimize the amplifier's headroom.
Contour: As part of the amps active equalization
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the contour control decreases the 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
string harmonics and effects the punch of your
sound.
Low-Mid: Boost and cut at 250Hz +6dB/-10 dB.
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A "Q optimized" band pass type, this works for
main body of your sound.
MB 500
GAIN CONTOUR TREBLE HI-MID
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7
LOW-MID BASS BOOST
OFF
ON
G.I.V.E
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Bass: Boost and cut a 60Hz +10 dB, shelving
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type. This is used to control the low end push.
Boost: This is a post E.Q. gain stage using
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G.I.V.E. technology which adds "growl" as it is
turned up.
GIVE: This button activates the Boost and
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Master B volume control. This can also be
activated using the foot switch (included).
Master B: This is the master volume control
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when boost is activated.
Master: This is the master volume control when
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the boost is inactive.
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.
Limiter: When this button is engaged it prevents
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the power amp
recommended that this feature is used for during
high volume applications.
6
15
POWER
MASTER-B MASTER
OFF
ON
MB 500
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from distorting. It is