Series
carefulconsideration
we at Gallien-Krueger are pleased that you
chose us, and are determined that you will be a
ed customer. In choosing a MB Series
satisfi
amplifier
unique features which will allow you to create
you
To get the most out of your new purchase, please
ta
If you are in a hurry, we suggest you at least read
through the Quick Start section before setting up
you
give you a few quick tips, but is not a substitute
fo
Your amplifier should have come with the
following items, please check the contents of the
box to ensure that you have everything.
Included with your MB Series Amplifier:
Power cord 1
Owner’s manual
Warranty card
Safety instructions sheet
If your MB Series amplifier did notcome with all the
item
sett
you
We wish you a lifetime of good playing and
remember t
, you now own an amplifier with many
r own distinct sound.
ke a few minutes to read through this manual.
r new rig. This will help get you started and
r reading the rest of the manual.
s listed, or if you encounter problems while
ing up your new equipment, please contact
r local dealer or GK as soon as possible.
en-Krueger, Inc.
4 Industrial Drive
ne: (209) 234-7300
: info@gallien.com
o always have fun!
on your part. For our part,
1
1
1
GK Philosophy
I have never seen the point in doing things the
way others have done them. I also have not
been very interested in following the latest fad.
I’m a Stanford educated engineer who worked
my way through school as a musician. Like
l musicians, I have lugged amplifiers up
al
irways and into car trunks, always wondering
sta
wh
y these things had to be so heavy, bulky, and
hard to handle.
As the principal innovator at GK, our products
t my attitudes and life experiences.I
reflec
n’t mod elmyd esi gnsa fte rother
do
ma nuf act urer
new and old
solutions
ucts enjoy a unique, unmatched sound,
prod
lowing you every opportunity to make an
al
original statement.
Having supported my products for over thirty
ars, I have learned from the story they tell.
ye
Gallien
has a commitment to support that legacy. Just as
the products I created over thirty five years ago
are still telling their story, the products we create
today will be talking to us tomorrow.
We’ll be listening,
s’ products.Instead, I believe
pro
blems are best solved with new
. Having taken our own path, GK
-Krueger is a reflection of that story, and
Robert Gallien
Founder and President
2
Page 3
MB SERIES
C A U TI O N
RIS K O F E LE CTR IC SHO CK
DO N OT OP EN
!
!
C AU T I ON :
WA RNI NG:
TO R EDU CE T HE RI SK O F EL ECT RI C SH OCK , DO N OT
RE MOV E TO P COV ER. NO U SER -SE RVI CE AB LE PA RTS
IN SID E. RE FER S ER VIC ING TO Q UAL IFI ED S ERV IC E
PE RSO NN EL .
TO R EDU CE TH E R IS K OF FI RE O R EL EC TRI C S HO CK ,
DO NO T EX POS E T HI S AP PLI AN CE TO R AI N O R M OIS TUR E
T he li ght nin g f la sh wit h a rro w
he a
d sym bol , w it hin th e
eq uil
at era l t ria ng le, is
in ten ded to a ler t t he us er to the
pr
es enc e o f u ni nsu lat ed “da ng ero us vol tag e”
wi thi n t he pr odu ct inc lo sur e t hat ma y be of
su ffi cie nt ma gni tud e t o c on sti tut e
a ris k o f e le cti tri c s hoc k to per son s
Th e e xcl am ati on poi nt wi thi n a n
eq uil
at era l t ria ng le, is i nte nde d
to al ert t he use r t o the pr ese nce
of im por ta nt ope rat ing a nd
ma i
nt ena nce (
se rvi cin g) in str uct ion s i n the
li ter atu re ac com pan yin g t he ap pli anc e.
C AU T I ON :
ATTE NTIO N:
TO PR EVE NT EL ECT RIC SH OCK , MAT CH WID E B LA DE OF PLU G T O
WI DE SLO T, FUL LY I NSE RTE D.
PO UR EVI TE R L ES CH OCS EL EC TRI QUE S, INR OD UIR E L A L AME L A
PL US LA RGE D E LA FIC HE DA NS LA BO RNE C ORR ES PON DAN TE
DE L A P RIS E E T P OUS ER JU SQU ’AU FO ND .
Table Of Contents
Safety Information __________________________ Pg. 4
Quick Start ________________________________ Pg. 5
Front Panel Controls ________________________ Pg. 6
Sound Tips ________________________________Pg. 7
Installation and Maintenance ___________________Pg. 8
Tech Talk ________________________________Pg. 9
ations ______________________________Pg. 10
Specific
*All Features and specifications are subject to change without notice
Please read the Safety Information section on page 4 and installation
ctions on page 12 before continuing.
instru
Gallien-Krueger
Industrial Drive
2234
Stockton, CA 95206
phone: 209.234.7300
fax: 209.234.8420
email: in
internet: www.gallien-krueger.com
This amplifier is capable of producing high sound pressure levels.
Continued exposure to high SPL’s can cause damage to your hearing.
Always set the volume at a safe listening level or use hearing
fo@gallien-krueger.com
Warning!
protection if the unit is operated at higher levels.
3
Page 4
MB SERIES
Safety Information
Please read all enclosed safety precautions
before connecting or operating this product.
Verify
Line Voltage and Amperage:Your
new MB Series Bass amplifier has been factory
co
nfigured for use with the specific line voltage
for your location:
0 Volt/60Hz 15 A circuit for USA/Canada.
12
23
0 Volt/(50/60Hz) 10 A circuit for
Australia.
UK/
23
0 Volt/(50/60Hz) 10 A circuit for Europe.
0 Volt/50Hz 15 A circuit for Japan.
10
0 Volt/50Hz 10 A circuit for Korea.
22
Proper AC circuit for all other countries.
Connecting the amplifier to a line with
specifications other than indicated above can
create safety and fire hazard, and may damage
the amplifier. If you have any questions about
the voltage requirements for your specific
mo
del, or about the line voltage in your area,
contact your dealer before plugging the unit into
a wall outlet.
Verify AC Circuit Capacity Before Use:
The high power output of your amplifier may
require heavy current drawunder full-load
conditions. To insure proper performance and
avoid potential safety hazards, we recommend
connection to line circuits with amperage
specified “as above”. Connecting to the same
circuit used by other heavy-power devices,
such as high-wattage lights, may cause circuit
s to trip. It is always a good idea to avoid
breaker
using any audio equipment on the same AC circuit
as equipment with motors, such as air
conditioners or refrigerators. This will lessen the
possibility of power variation and electrical
start-up noise affecting your sound.
AC Power Cord:
To avoid safety hazards, use only the power cord
supplied with your unit. If a replacement cord is
needed, make certain to use a standard IEC
complian
be replaced immediately. When setting up, make
certa
not intend to use the amplifier for a considerable
length of time, disconnect the plug from the AC
Mains Socket. Do not use an extention cord.
Earth Grounding Connection:
To prevent electric shock, do not remove the
grounding plug on the power cord, or use any plug
or extension cord that does not have a grounding
plug provided. Make certain that the AC outlet
is properly grounded as well. Do not
adapter plug with this product.
Do Not Open the Amplifier Enclosure:
There are no user serviceable parts inside this
product.
present
prod
enters the unit, or any metal object such as a
paper clip accidentally falls inside the enclosure,
disconnect the unit from the AC power source
imm
stat
Setup:
To insure proper operation and to avoid potential safety hazards, place the unit
surface. Do not plug or unplug the instrument
or speaker cable while the amplifier power is on.
Speaker Cables:
To prevent electric shock, use “Class II Wiring”
speaker cable or speaker cable with double or
reinforced insulation when connecting to speaker
cabinet.
t cord. Damaged power cords should
in thattheAC plug is easilyaccessible. If you do
use an
Opening the amplifier enclosure may
a shock hazard. Modification to the
uct will void your warranty.If liquid
ediately and consult an authorized service
ion.
on a firm, level
Please refer to page 10 for more instructions
concerning installation.
Heat & Ventilation:
Make sure there is space provided for proper
ventilation. Avoid using in extreme hot or cold
locations and areas that are exposed to direct
sunlight or near heating equipment. Avoid using
in moist or high humidity areas. NEVER
BLOCK THE FAN VENT HOLES ON THE
SIDES OF THE UNIT.
4
Page 5
MB SERIES
Quick Start
The MB Series amplifier is designed to be simple
to operate. All controls have a well defined
purpose. These directions will take you through
the basics and give you a good start for setting up
your sound.
1. Plug it in:
Set the power switch to Off and connect the
supplied power cord, from the amplifier AC
receptacle, to an AC power outlet of proper
voltage and power rating (see safety information
on page 5 for details).
2. Connect your cabinets:
Connect your speaker cabinets to the amplifier
outputs marked Speaker. The MB features dual
use speaker connections. These unique jacks
allow for Speakon or 1/4” plugs to be used. Be
sure not to exceed the recommended speaker load
as noted below.
Maximum Recommended Speaker Loads:
One 4 Ohm, or two 8 Ohm cabinets.
3. Initial front panel control settings:
Set all EQ controls and contour knob to 12
o’clock. Set the input volume controls at 0.
5. Level and Master
Set
the Master Volume to 3 o’clock. Turn the
Input Volume knob up as you play to the desired
level. If the clip light (pad button) flashes
output
more
than occasionally, press the -10db pad
in and turn the Input Volume knob up. If it
button
is
still lighting often, try turning the volume down
on your bass.
Volume settings:
4. Plug in your bass:
Using an instrument (shielded) cable, connect
your bass to the Input jack and press the power
switch on. If you have active tone controls on your
bass, turn all of the controls to the middle or flat
position and turn the volume all the way up. If you
have conventional, passive tone controls, turn all
tone and volume controls all the way up.
5
Page 6
POST
PRE
EQ
2
1
MB200
INPUT
100-120V 50/60Hz
-10dBGAINCONTOUR TREBLEHI-MIDLOW-MIDBASS
1
AC INPUT
10
ON
OFF
2
34
DIRE
ON
OFF
CT OUT
11
MB 200 Controls
1
Input: A standard ¼” input jack to connect active
or passive basses using a shielded cord.
-10 dB Pad/Clip indicator: Input attenuator
2
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.
3
Gain: Sets the preamp gain after the input stage. It
is used in conjunction with the input pad to
optimize the amplifier’s headroom.
4
Contour: As part of the amps active equalization
the contour control decreases the mid-range
frequencies while boosting low and high
frequencies.
5
Treble: Boost and cut at 7 kHz +14 dB shelving
type. Use this control to add or remove edge and
definition.
6
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.
7
Low-Mid: Boost and cut at 250Hz +6dB/-10 dB.
A “Q optimized” band pass type, this works for
main body of your sound.
8
Bass: Boost and cut a 60Hz +10 dB, shelving
type. This is used to control the low end push.
turned up.
9
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
POWER
OFF
ON
MB200
5
6
AUX IN
7
HEADPHONES-1
T-2
LINE OU
89
200W @ 4 OHMS
CLASS 2
12131415
indicating the amp is ready for normal
blue,
operation.
heat
ring
This
Should the amp experience a fault (over
or over current) the amp will mute and the
will light red until the condition is corrected.
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.
AC
Receptacle: The detachable power cord
10
plugs in here.
Balanced
11
balanced
Direct Out: This electronically
output allows a direct connection to a
P.A. system.
Pre/Post EQ Button: This button switches the
12
direct out signal to be before or after the EQ.
In: This 1/8" input for a CD or MP3 player
Aux
13
allows
the user to monitor an external audio
source
.
Headphone/Line
14
output
allows the user to send a direct
(unbalanced)
inputs
such as personal multitrack recorders. This
connection
Unswitched,
out: When switched, this
line out to devices with unbalanced
requires a shielded patch cord.
this headphone jack can be used to
monitor your playing with headphones.
15
Headphone/Line
out switch: This switch toggles
the output from headphone to line out.
Speaker:
16
Delivers
impedances
load
Ohm
speaker
Power amp output to speaker cabinet.
200w into 4 Ohm loads. Lower
such as 8 Ohms or 16 Ohms and no
are acceptable. One 4 Ohm speaker and one 8
speaker is not recommended. This unique
output allows you to use a ¼” plug or the
high current, twist-lock Speakon connecto
6
SPEAKER
WIRING
16
r.
Page 7
MB SERIES
Sound Tips
The MB Series has several unique features which,
if used properly, will obtain the sound you have
been searching for.
The Equalizer:
The equalizer is used to fine tune your sound.
When adjusting making adjustments, do it just a
little at a time. These are active circuits and small
changes can make a big difference in your sound.
With a little experimentation you will find that this
equalizer is very easy to use and provides you with
a large variety of great sounds unique to GK.
Contour:
Increasing the Contour level will scoop out
midrange frequencies while boosting the highs
and lows. The sound, once again, is unique to GK
and available on any other Bass amp. Lower
contour settings are recommended for midrange
clarity at higher playing levels.
Direct Out:
The MB Series provides a low noise, high quality
balanced direct output for connection to PA and
recording consoles. A ground lift switch is
included to remove hum and buzz when
connecting to equipment powered by a different
ground system.
With the pre/post EQ switch set to “pre” (out), the
direct output signal is fed directly from the input
stage providing a low noise output superior to
external direct boxes and impedance transformers.
In the "pre" position, the direct output signal is
only effected by the Input Volume, -10db pad and
mute. This allows you to adjust your tone and
volume on stage without changing the direct
output signal level and confusing your sound man.
Changing the pre/post EQ switch to “post” (in),
sends the "GK sound" (EQ settings etc.) and
preamp response to the direct out jack. This gives
you complete control over the direct out’s tone and
volume.
7
Page 8
MB SERIES
Installation:
insure proper operation and to avoid potential
To
safety
hazards, place the unit on a firm, level
.
surface
Ventilation
Make
ventilation.
located
amplifier
enclosed
movement within the enclosure to allow
air
proper
information.
cold locations, and areas that are exposed to
or
direct
moist or humid locations
Remember, power amplifiers generate heat. The
ventilation
designed
placing
dissipation
long-term
the other equipment
Moving the Unit:
Before
interconnection cords with other
any
components,
the unit from the AC outlet.
:
certain that proper space is provided for
Never block the fan vent holes
on the sides of the amplifier. If the
will be installed in a rack or other
area, make sure that there is sufficient
cooling. Consult your dealer for more
Avoid installation in extremely hot
sunlight, or near heating equipment. Avoid
.
slots on the enclosure are specifically
to remove this heat. Blocking or
other electronic equipment near the heat
system may possibly affect the
reliability of both your amplifier and
.
moving the unit, be certain to disconnect
and make sure that you disconnect
Maintenance:
Your
new amplifier is rugged. It was built to give
a lifetime of trouble-free operation, if it is
you
operated
contained
required
your
recommend
scratches and road wear.
Packaging:
The carton and packing materials used in shipping
you
cushion it
during transport.
carton
the event you move, or the amplifier needs repai
in accordance with the instructions
in this manual. The only maintenance
is cleaning. If you are going to move
amplifier around frequently, we
a road case to protect it from
r new amplifier were specifically designed to
from the shocks and vibration that occur
We suggest that you save the
and packing materials for use in shipping, in
r.
Cleaning
When
cloth.
other
abrasive
of
the unit.
:
the unit gets dirty, clean only with a dry
Never use benzene, thinner, alcohol, or
volatile cleaning agents. Do not use
cleaners, as they may damage the finish
metal parts. Avoid spraying insecticides near
8
Page 9
MB SERIES
Tech Talk
Characteristics of the MB Series:
The MB Series 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 years of continuous
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.
Cool Running = Reliability:
To cool the amp when its being driven hard, we’ve
designed
a temperature sensitive fan cooling system. When
amp is under a light load, the fan is off or running at a
the
low
speed, reducing fan noise. As the amp works harder,
the fan speed increases to keep everything cool.
rotection Circuitry:
Smart P
MB Series protection circuitry constantly monitors for
The
unsafe
operating conditions such as short circuits,
miss-wired
ventilation,
addition,
the
output
changes
muted
activates
the
are
described
GK directly for technical advice.
In Closing:
You should now have a thorough understanding of how
your
it
reading
times!
ww
sales@gallien.com.
speaker cables, blown speakers, improper
and incorrect speaker configurations. In
protection is provided during power up/down. If
MB Series senses any unsafe operating conditions, the
signal is immediately muted and the power light
from Blue to Red. The amplifier will remain
until the fault is removed. If the protection circuit
while playing, turn the amplifier off and check
amplifier speaker output connections. Be sure that you
not exceeding the maximum recommend load
in this manual. If the problem persists, contact
new MB Series amplifier works and what advantages
can offer you in getting “your” sound. We thank you for
the Owner’s Manual and wish you the best of
Please send us your comments via
w.gallien-krueger.com or email us at
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.
control tunes between two different shaping circuits,
This
greatly different responses. With the control all the
with
up, the low end is slightly boosted, the mids are
way
and the high end is pushed up. This is only found
dropped
in GK amplifiers.
9
Page 10
Specifications
MB200 SPECS
AUX IN
PRE
POST
INPUT
DIR ECT
OUT
GAI N
CON TOUR
ON
OFF
AM P
BLOCK DIAG RAM
4 B AND
EQ
ON
OFF
-10 dB pad
AM P
HEAD
PHONES
LINE
OUT
1
2
1/4”
SPEAKON
COMBO
JACK
INPUT
ON
-10dB pad
OFF
GAIN
MB200
BLOCK DIAGRAM
CONTOUR
ON
OFF
MB200 SPECS
4 BAND
EQ
AMP
AMP
HEAD
PHONES
LINE
OUT
AUX IN
POST
PRE
DIRECT
OUT
+
-
12
3
1/4”
SPEAKON
COMBO
JACK
Output Power:
140W @ 8 Ohms,
200W @ 4 Ohms.
Input Section:
Maximum Input Level
With -10dB pad
Input Impedance
Direct Output Impedance
Aux-In Input Impedance
0.6V Rms
1.6V Rms
1M Ohms
500 Ohms
100K Ohms
Equalizer:
Bass
Lo-Mid
Hi-Mid
Treble
+/-10dB @ 60Hz
+6dB/-10dB @ 250Hz
+6dB/-10dB @ 1KHz
+/-14dB @ 7KHz
Voicing Filters:
Contour
+2dB @ 50Hz/ -10dB @ 500Hz/
+3dB @ 7 KHz
Noise: -90 dB reference to 200W/140W, “A” Weighted.
Amplifier Protection:
Full short circuit, thermal and RF protection.
Stable into reactive and mismatch loads.
Five second muted warm-up.
Cooling:
Variable speed fan.
MB200
Owners Manual
Part # 160-0630-A
Dimensions:
Height: 2.50” [63.50mm] ( With Rubber Feet)