Mesa Walk About Bass Amplifier User Manual
OOGIE
B
M
ESA
Owner's Manual
Greetings from the Home of Tone
Congratulations on your choice of the WalkAbout as your Bass amplifier and welcome
to the MESA/Boogie family! As a discriminating player you probably know that you
have purchased the
most comprehensive instrument for amplifying Bass that is
available. What you might not realize is that this entitles you to all the experience,
resources and commitment our twenty-five years of service to musicians world wide
has to offer. Our responsibility is to help you sound great! So, if at any time you feel
you need help or direction, we are here for you...a phone call away.
PRECAUTIONS & WARNINGS
Your MESA/Boogie Amplifier is a professional instrument. Please treat it with respect and operate it properly.
USE COMMON SENSE AND ALWAYS OBSERVE THESE PRECAUTIONS:
READ AND FOLLOW INSTRUCTIONS OF PROPER USAGE.
YOUR AMPLIFIER IS LOUD! EXPOSURE TO HIGH SOUND VOLUMES MAY CAUSE PERMANENT HEARING DAMAGE !
No user serviceable parts inside. Refer service to qualified personnel. Always unplug AC power before removing chassis.
EXPORT MODELS: Always insure that unit is wired for proper voltage. Make certain grounding conforms with local standards.
WARNING: EU: permission from the Supply Authority is needed before connection.
WARNING: Vacuum tube amplifiers generate heat. To insure proper ventilation always make
certain there is at least four inches (100mm) of space behind the rear of the amplifier cabinet.
Keep away from curtains or any flammable objects.
WARNING: Do not block any ventilation openings on the rear or top of the amplifier. Do not
impede ventilation by placing objects on top of the amplifier which extend past the rear edge of
its cabinet.
WARNING: Do not expose the amplifier to rain, moisture, dripping or splashing water. Do not
place objects filled with liquids on or nearby the amplifier.
WARNING: Always make certain proper load is connected before operating the amplifier.
Failure to do so could pose a shock hazard and may result in damage to the amplifier.
Do not expose amplifier to direct sunlight or extremely high temperatures.
Always insure that amplifier is properly grounded. Always unplug AC power cord before changing
fuse or any tubes. When replacing fuse, use only same type and rating.
Avoid direct contact with heated tubes.
Keep amplifier away from children.
Be sure to connect to an AC power supply that meets the power supply specifications listed on
the rear of the unit. Remove the power plug from the AC mains socket if the unit is to be stored
for an extended period of time. If there is any danger of lightning occurring nearby, remove the
power plug from the wall socket in advance.
To
avoid damaging your speakers and other playback equipment, turn off the power of all related
equipment before
making the connections.
Do not use excessive force in handling control buttons, switches and controls. Do not use
solvents such as benzene or paint thinner to clean the unit. Wipe off the exterior with soft cloth.
FRONT PANEL:
REAR PANEL:
Precautions 0
Overview 1/2
Instant Gratification
2
Helpful Hints 2/3
Instrument Inputs: ACTIVE & PASSIVE 3
CONTROLS:
GAIN 4
BASS 4
MID 5
TREBLE 5
DI LEVEL 6
MASTER 6
PARAMETRIC EQUALIZER 6/7
FREQUENCY CONTROLS 7
FUSE 8
A.C. RECEPTACLE 8
DIRECT OUT: Ground Lift - XLR Jack 9
EFFECTS LOOP: Send & Return 9
SPEAKER OUTPUT
9
FACTORY SAMPLE SETTINGS 10
PERSONAL SETTINGS PAGE 11/12
TUBE NOISE and DIAGNOSING PRE-AMP TUBE PROBLEMS 13
PARTS SHEET 14
Table of Contents
14
OVERVIEW:
M-Pulse
360
WalkAbout
Operating Instructions
CAUTION
:
Unplug power
before
removing fuse or
bolts
holding chassis
POWER FUSE
6A
SLO
BLO
120 V~
60 Hz
6 A
F
U
S
E
F
U
S
E
GROUND
LIFT
DIRECT OUTPUT
EFFECTS LOOP
SPEAKER OUTPUT
SUGGESTED LOAD
RETURN SEND
4 OHMS
REAR VIEW: WalkAbout
SIMUL STATE BASS AMPLIFIER
TUBE DRIVEN-MOSFET POWER
HANDBUILT IN PETALUMA , CALIFORNIA
M-PULSE TM WALKABOUT
OVERVIEW: (Continued)
Connect your A.C. Power Cable to a grounded outlet. Avoid ground lifts (3 to 2 prong adapter) whenever possible.
You may use a cabinet (s) of a higher rating safely (8 Ohm) with
and from the
Instrument
shelving type controls with a broad response even though they are acting primarily on
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