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Tech Talk
The MB800 features a completely discreet FET
(field effect transistor) driven preamp. The same
FET technology used to create the legendary boost
(G.I.V.E.) circuit found in all GK amplifiers for over
30 years is used in every stage of the MB800
preamp. Using FET devices with the gate biased in a
way that emphasizes the optimum harmonic content
to drive the GK four band active EQ, Contour and
Gain allows the MB800 to transition seamlessly
from a full, warm, clean tone to full on GK growl.
Characteristics of the MB 800:
The MB 800 is a flexible, state-of-the-art amplifier
designed to deliver maximum performance while
remaining small, lightweight and simple to operate.
This is accomplished through a few, very important
features:
· Class D power supply and power amp.
· Four, Bass specific bands of active equalization
for precise tone control.
· Balanced direct output eliminates the need for a
direct box.
· Continuously variable fan cooling.
Equalization: Standard tone controls and graphic
equalizers give you plenty of variation, but they
don't provide what the instrument really needs. The
fact is, graphic equalizers are intended for room
equalization. The equalization in Gallien-Krueger
amplifiers
reflects
40
development and refinement. The GK equalizer is
unique to the industry, it's not just a normal four
band equalizer, each section is a special circuit
optimized to perform a bass specific job in its range
of operation. These sections are wired in series, so
they add to one another creating a tremendously
flexible equalizer, that sounds natural at any setting.
Now it is possible to obtain the sound you desire.
Contour: The Contour is used to completely revoice
the amplifier. The Contour control tunes between
two different shaping circuits, with greatly different
responses. With the control all the way up, the low
end is slightly boosted, the mids are dropped and the
high end is pushed up. This is only found in GK
amplifiers.
MB 800
.
years
of
continuous
"G.I.V.E." Technology: As in all GK pre-amps, the
MB Series pre-amp incorporates what we call
G.I.V.E (Gate Induced Valve Effect) Technology. We
use field effect devices with the gate biased in a way
that emphasizes the optimum harmonic content of
the signal. Working in concert with our unique four
band active equalizer, and three stage voicing filter
section, G.I.V.E. technology produces a consistently
pleasing bass tone.
Cool Running = Reliability: To cool the amp when
its being driven hard, we've designed a temperature
sensitive fan cooling system. When the amp is under
a light load, the fan is off or running at a low speed,
reducing fan noise. As the amp works harder, the fan
speed increases to keep everything cool.
Smart Protection Circuitry: The MB Series
protection circuitry constantly monitors for unsafe
operating conditions such as short circuits,
miss-wired
speaker
improper
ventilation,
configurations. In addition, protection is provided
during power up/down. If the MB Series senses any
unsafe operating conditions, the output signal is
immediately muted and the power light changes
from blue to red. The amplifier will remain muted
until the fault is removed. If the protection circuit
activates while playing, turn the amplifier off and
check the amplifier speaker output connections. Be
sure that you are not exceeding the maximum
recommend load described in this manual. If the
problem persists, contact GK directly for technical
advice.
In Closing: You should now have a thorough
understanding of how your new MB Series amplifier
works and what advantages it can offer you in getting
"your" sound.
We thank you for reading the owner's manual and
wish you the best of times! Please send us your
comments via www.gallien-krueger.com or email us
at sales@gallien.com.
10
cables,
blown
speakers,
and
incorrect
speaker
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