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-10 dB Pad/Clip indicator:
Input attenuator button. This button is generally set to the out
position except in cases where the clip LED flashes more than occasionally. It may be neces-
sary 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 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. It is used in conjunction with the input pad to
optimize the amplifier’s headroom.
Contour:
As part of the amps active equalization the contour control decreases the mid-range
frequencies while boosting low and high frequencies.
Treble:
Boost and cut at 7 kHz +14 dB shelving type. Use this control to add or remove edge
and definition.
Hi-Mid:
Boost and cut at 1 kHz +6 dB. A “Q Optimized,” band pass type, this works on lower
string harmonics and effects the punch of your sound.
Bass:
Boost and cut a 60Hz +10 dB, shelving type. This is used to control the low end push.
Low-Mid:
Boost and cut at 250Hz +6dB/-10 dB. A “Q optimized” band pass type, this works
for main body of your sound.
Boost:
This is a post E.Q. gain stage using G.I.V.E. technology which adds “growl” as it is
turned up.
GIVE:
This button activates the Boost and Master B volume control.. This can also be
activated using the foot switch (included).
Master B:
This is the master volume control when boost is activated.
Master:
This is the master volume control when the boost is inactive.
Power Switch:
Turns the amplifier on and off. In 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.
Input:
A standard ¼” input jack to connect active or passive basses using a shielded cord.
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MB² SERIES
Front Panel Features
6
ON
OFF
ON
OFF
ON
OFF
ON
OFF
INPUT
-10dB
MUTE
GAIN
CONTOUR
TREBLE
HI-MID
LOW-MID
BASS
BOOST
MASTER-B
MASTER
POWER
MB
500
2
G.I.V.E
CLIP
