BBE 381 User manual
Sound
Inc.
MODEL
381
GUITAR
PREAMP
USER
MANUAL
O
o
Important
Safeguards
A
To
prevent
fire
or
shock
hazard,
do
not
expose
the
unit
to
rain
or
moisture.
ATTENTiON:
RISQUE
DE
CHOC
ELECTRIC-
NE
PAS
OUVRIR.
The
lightning
flash
with
arrowhead
symbol,
within
an
equilateral
triangle,
is
intended
to
aiert
the
user
to
the
presence
of
uninsulated
"dangerous
voltage"
within
the
product’s
enclosure
that
may
be
of
sufficient
magnitude
to
constitute
a
risk
of
electric
shock
to
persons.
The
exclamation
point,
within
a
equilaterai
triangie
is
intended
to
alert
the
user
to
the
presence
of
important
operating
and
maintenance
(servicing)
instructions
in
the
iiterature
accompanying
the
appliance.
For
your
protection,
please
read
these
safety
instructions
completely
before
operating
the
appliance,
and
keep
this
manual
for
future
reference.
Carefully
observe
all
warnings,
precautions
and
instructions
on
the
appliance
and
described
in
the
operating
instructions
supplied
with
the
appliance.
INSTALLATION-
Water
and
Moisture
-
Do
not
install
the
appliance
near
water:
for
example,
near
a
bathtub,
washbowl,
kitchen
sink,
laundry
tub,
in
a
wet
basement,
or
near
a
swimming
pooi.
Heat
-
Do
not
instaii
the
appliance
near
sources
of
heat
such
as
radiators,
heat
regis¬
ters,
stoves,
or
other
appliances
that
pro¬
duce
heat,
USE
-
Power
Source
-
Connect
the
appliance
to
a
power
supply
only
of
the
type
described
in
the
operating
instructions
or
as
marked
on
the
appliance.
Power-Cord
Protection
-
Route
the
power
cord
so
that
it
is
not
likely
to
be
walked
on
or
pinched
by
having
objects
placed
on
it,
paying
particular
attention
to
the
plugs,
receptacles,
and
the
point
where
the
cord
exits
from
the
appliance.
SERVICE
-
Unplug
the
appliance
from
the
wall
outlet
and
consult
qualified
service
personnel
when:
•
the
power
cord
or
the
plug
has
been
damaged.
*
a
solid
object
or
liquid
has
fallen
into
the
cabinet.
Ventilation
-
Situate
the
product
so
its
location
or
position
does
not
interfere
with
its
proper
ventilation.
For
example,
you
should
not
place
the
product
on
a
bed,
sofa,
rug,
or
similar
surface
that
might
block
the
vent
openings,
or
placed
in
a
built-in
installation,
such
as
a
bookcase
or
cabinet
that
might
impede
the
flow
of
air
through
the
ventilation
openings.
Grounding
or
Polarization
-
Do
not
defeat
the
grounding
or
polarization
feature
of
the
AC
power
cord.
If
your
AC
receptacle
will
not
accept
the
power
cord
plug,
contact
your
electrician
to
install
a
proper
AC
receptacle.
When
not
in
use
-
unplug
the
power
cord
of
the
appliance
from
the
outlet
when
left
unused
for
a
long
period
of
time.
To
disconnect
the
cord,
pull
it
out
by
grasping
the
plug.
Never
pull
the
plug
out
by
the
cord.
*
the
appliance
has
been
exposed
to
rain
or
moisture.
*
the
appliance
does
not
appear
to
operate
normally
or
exhibits
a
marked
change
in
performance.
*
the
appliance
has
been
dropped,
or
the
enclosure
damaged.
Wall
or
Ceiling
Mounting
-
If
your
appliance
can
be
mounted
to
a
wall
or
ceil¬
ing,
mount
it
only
as
recommended.
AC
Receptacle
-
Check
to
make
sure
that
the
AC
receptacle
holds
the
power
cord
plug
firmly
and
securely.
If
the
power
cord
plug
is
loose,
contact
your
electrician
to
replace
the
defective
and
unsafe
AC
Foreign
Objects
-
Be
careful
that
foreign
objects
and
liquids
do
not
enter
the
enclosure
through
openings.
Do
not
attempt
to
service
the
appliance
beyond
that
described
in
the
operating
instructions.
For
all
other
sen/icing,
refer
to
qualified
sen/ice
personnel
only.
A_
TABLE
OF
CONTBITS
Precaution.i
Product
Description.1
Controls/Connections.2
Footswitch.6
Specifications.6
General
Operation/Applications.7-11
Service/Warranty
Information.12
Schematic
Diagrams.13-17
Congratulations
on
your
purchase
of
the
BBE
Model
381
Guitar
Pre-amp!
This
two
channel
guitar
pre-amp
offers
flexibility
unequaled
in
today’s
market
place.
With
the
BBE
38Ts
two
channels,
the
player
is
able
to
achieve
the
more
traditional
clean
and
overdrive
tones
while
leaving
room
to
create
some
unique
tones
of
his/her
own.
An
important
advantage
with
the
BBE
381
Guitar
Pre-amp
is
that
all
of
the
controls
are
front
panel
mounted.
This
allows
for
an
instantaneous
status
report
of
all
controls,
at
a
glance.
Additionally,
the
BBE
381
Guitar
Pre-amp
is
equipped
with
both
Main
Outputs
and
Recording
Outputs
to
increase
its
interfacing
capabilities.
So
whether
in
the
studio
or
on
stage,
the
BBE
381
will
indulge
players
of
any
style
or
caliber.
The
BBE
381
Guitar
Pre-amp
is
also
equipped
with
the
following
features:
1.
Custom
BBE
circuit
for
increased
tonal
quality
and
intelligibility
with
a
built-in
noise
suppressor.
2.
Passive
three
band
tone
controls
for
the
clean
channel
and
active
four
band
tone
controls
for
the
distortion
channel.
3.
Recording
Outputs
allow
the
user
to
plug
directly
into
a
mixing
console
or
to
record
direct
to
tape
and
still
have
that
full,
rich,
cabinet
sound
that
the
player
enjoys
hearing.
The
importance
of
this
feature
is
most
evident
in
eliminating
the
need
to
transport
a
speaker
cabinet
or
the
use
of
microphones
for
sound
reinforcement.
4.
A
Stereo
Effects
Loop
to
interface
the
BBE
381
with
the
most
popular
of
effects
processors.
5.
Independent
channel
volumes
to
coordinate
the
proper
level
blend
between
the
clean
and
distortion
channels.
6.
Channel
Select
Footswitch
to
switch
between
the
Clean
and
Distortion
channels.
The
following
sections
will
provide
detailed
information
on
all
of
the
BBE
38Ts
functions.
IMPORTANT
Before
you
begin,
please
check
the
contents
of
this
box
to
insure
that
included
are:
1.
The
BBE
381
Guitar
Pre-amp.
2.
The
Channel
Select
Footswitch.
3.
A
25’
two
conductor
cable.
4.
BBE
381
User’s
manual.
If
any
of
these
items
are
found
to
be
missing,
contact
your
BBE
dealer
from
whom
the
unit
was
purchase
immediately.
1
A_
CONTROLS
AND
CONNECTION
FRONT
PANEL
1.
INPUT:
This
jack
allows
for
the
connection
of
the
guitar
to
the
BBE
381
pre-amp.
2.
CH.
1
:
This
“GREEN”
LED
illuminates
when
the
Clean
Channel
is
selected.
CLEAN
CHANNEL
3.
VOLUME:
This
knob
controls
the
level
of
the
Clean
Channel
volume.
Use
this
knob
in
conjunction
with
the
Distortion
Channel’s
volume
knob
to
achieve
the
desired
balance.
4.
BASS:
This
control
adjusts
the
amount
of
low
frequency
content,
shelved
at
80Hz,
within
the
channel.
Turning
the
knob
to
its
maximum
position
(fully
clockwise)
boosts
the
low
frequencies
+10dBu.
Turning
the
knob
to
the
minimum
position
(fully
counter-clockwise)
would
be
flat
or
no
change.
5.
MID:
This
control
adjusts
the
amount
of
mid
range
frequency
content,
peaked
at
500Hz,
within
the
channel.
Turning
the
knob
to
its
maximum
position
(fully
clockwise)
boosts
the
mid
range
frequencies
-t-8dBu.
Turning
the
knob
to
its
minimum
position
(fully
counter-clockwise)
would
be
flat
or
no
change.
6.
HIGH:
This
control
adjusts
the
amount
of
high
frequency
content,
shelved
at
6kHz,
within
the
channel.
Turning
the
knob
to
its
maximum
position
(fully
clockwise)
boosts
the
high
frequencies
-i-IOdBu.
Turning
the
knob
to
its
minimum
position
(fully
counter-clockwise)
would
be
flat
or
no
change.
7.
CHANNEL
SELECT:
This
button
allows
for
the
selection
between
the
Clean
and
Distortion
Channels.
When
in
the
“OUT”
position,
the
“GREEN”
LED
will
illuminate,
indicating
that
the
Clean
Channel
has
been
selected.
When
depressed,
the
“IN”
position,
the
“RED”
LED
will
illuminate
indicating
that
the
Distortion
Channel
has
been
selected.
This
function
may
also
be
controlled
by
the
BBE
footswitch.
Note:
The
Channel
Select
switch
on
the
front
panel
of
the
BBE
381
will
be
disabled
while
the
footswitch
is
connected.
8.
CH.
2:
This
“RED”
LED
illuminates
when
the
Distortion
Channel
is
selected.
DISTORTION
CHANNEL
9.
DRIVE:
This
knob
controls
the
amount
of
“touch
responsive”distortion
that
is
applied
to
the
second
channel.
Minimum
distortion
is
achieved
when
the
“Drive”
knob
is
turned
completely
counter-clockwise.
Turning
this
knob
clockwise
increases
the
amount
of
distortion
and
sustain.
Note:
The
degree
of
“touch
response”diminishes
as
the
“Drive”
level
is
increased.
10.
BASS:
This
control
adjusts
the
amount
of
the
low
frequency
content,
peaked
at
130Hz,
within
the
channel.
Turning
the
knob
to
its
maximum
position
(fully
clockwise)
boosts
the
low
frequencies
-i-15dBu.
Turning
the
knob
to
its
minimum
position
(fully
counter-clockwise)
would
be
flat
or
no
change.
11.
MIDI:
This
control
adjusts
the
amount
of
mid
range
frequency
content,
peaked
at
340Hz,
within
the
channel.
Turning
the
knob
to
its
maximum
position
(fully
clockwise)
boosts
the
mid
range
frequencies
-i-15dBu.
Turning
the
knob
to
the
minimum
position
(fully
counter-clockwise)
reduces
the
mid
range
frequencies
-5dBu.
The
10
o’clock
position
would
be
flat
or
no
change.
3
12.
MID
2:
This
control
adjusts
the
amount
of
mid
range
frequency
content,
peaked
at
750Hz,
within
the
channel.
Turning
the
knob
to
its
maximum
position
(fully
clockwise)
boosts
the
mid
range
frequencies
+15dBu.
Turning
the
knob
to
the
minimum
position
(fully
counter-clockwise)
reduces
the
mid
range
frequencies
-5dBu.
The
10
o’clock
position
would
be
flat
or
no
change.
13.
TREB:
This
control
adjusts
the
amount
of
high
frequency
content,
peaked
at
4kHz,
within
the
channel.
Turning
the
knob
to
its
maximum
position
(fully
clockwise)
boosts
the
high
frequencies
-i-18dBu.
Turning
the
knob
to
the
minimum
position
(fully
counter-clockwise)
would
be
flat
or
no
change.
14.
VOLUME:
This
knob
controls
the
level
of
the
Distortion
Channei
volume.
Use
this
knob
in
conjunction
with
the
Clean
Channel’s
volume
knob
to
achieve
the
desired
balance.
BBE
PROCESS
15.
IN:
This
switch
engages
the
BBE
process.
When
depressed,
the
“IN”
position,
the
“GREEN”
LED
will
illuminate.
When
in
the
“OUT’
position,
the
“GREEN”
LED
will
not
illuminate,
indicating
that
the
BBE
process
has
been
disengaged.
16.
BBE
PROCESS:
This
control
introduces
the
BBE
process
which
has
specially
modified
for
the
BBE
381
Guitar
Pre-amp.
The
BBE
process
gives
the
user
a
more
detailed
perception
of
tonality,
added
“bite”
and
increased
clarity.
The
guitar’s
lower
tones
will
be
tightened
without
losing
their
thunderous
effect...
all
without
adding
or
creating
any
additional
noise
or
harmonic
distortion.
When
the
knob
is
in
its
minimum
position,
no
process
is
taking
effect
and
the
circuit
is
in
its
noise
suppression
mode.
Turning
the
knob
clockwise
will
introduce
the
BBE
process.
Adjust
the
knob
to
mix
the
desired
amount
of
process
for
your
own
needs.
The
BBE
process
also
has
its
own
in/out
switch
for
comparison
of
the
processed
to
unprocessed
signal
on
the
front
panel
of
the
BBE
381
pre-amp.
Experiment
with
the
process.
Use
the
BBE
as
an
extension
of
the
tone
controls.
Please
note
that
the
BBE
process
is
not
an
effect,
but
an
improvement.
A
good
place
to
start
with
the
BBE
process
is
to
set
the
knob
to
its12
o’clock
position
and
adjust
accordingly.
Note:
The
BBE
process
is
applied
before
the
effects
send.
MASTER
VOLUME
1
7
.
LEFT:
This
knob
controls
the
“Main
Output”
and
“Recording
Output”
levels
for
the
“LEFT”
side.
This
control
will
not
change
the
channel
balance
that
has
been
established
with
the
respective
channel
volumes.
18.
RIGHT:
This
knob
controls
the
“Main
Output”
and
“Recording
Output”
levels
for
the
“RIGHT”
side.
This
control
will
not
change
the
channel
balance
that
has
been
established
with
the
respective
channel
volumes.
19.
POWER:
This
switch
applies
AC
power
to
the
BBE
381
Guitar
Pre-amp.
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(MONO)
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SEND
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1.
POWERCORD:
This
is
a
standard
three-pronged
AC
power
cable
for
connection
to
any
standard
grounded
110Vac
outlet.
2.
FUSE:
Replace
ONLY
with
same
type
Fast
blow
fuse.
U.S.,
Canadian
and
Japanese
models:
250Vac,
1/2A
Fast
blow
Standard
model:
250Vac,
.125A
Fast
blow
MAIN
OUTPUTS
3.
LEFT
&
RIGFIT:
These
stereo,
Right
and
Left
unbalanced
1/4”
outputs,
are
for
connecting
the
BBE
381
Guitar
Pre-amp
to
the
next
subsequent
component
in
the
system.
Used
in
conjunction
with
the
Master
Volume,
these
outputs
can
accommodate
any
required
output
level.
Note:
The
LEFT
output
should
be
used
if
only
one
output
is
required.
RECORO
OUTPUTS
4.
LEFT
&
RIGHT:
These
stereo,
Right
and
Left
unbalanced
1/4”
outputs
are
for
connecting
the
BBE
381
Guitar
Pre-amp
to
a
mixing
console
or
tape
deck.
They
have
a
unique
active
filter
which
simulates
a
speaker
cabinet,
therefore
eliminating
any
need
for
“Miking”
the
speaker
cabinet
or
transporting
any
unnecessary
equipment.
Note:
The
LEFT
output
should
be
used
if
only
one
output
is
required.
The
Master
Volume
will
effect
Record
Outputs
simultaneously
with
the
Main
Outputs.
EFFECTS
LOOP
5.
RETURN:
Use
these
jacks,
Left
and
Right,
to
connect
to
an
effects
processor’s
stereo
output.
If
the
effector
is
monaural,
use
the
Left
return
jack.
This
will
cause
the
effected
signal
to
be
the
same
at
both
the
Left
and
Right
outputs.
6.
SEND:
Use
this
jack
to
connect
the
BBE
381
pre-amp
to
an
effects
processor’s
input.
This
level
is
approximately
-lOdBu
depending
upon
the
status
of
the
individual
channel’s
Volume
and
Tone
Control
settings.
CHANNEL
SELECT
FOOTSWITCH
7.
CHANNEL
SELECT
FOOTSWITCH:
Use
this
jack
to
connect
the
BBE
381
pre-amp
to
the
Channel
Select
Footswitch
via
any
two
conductor
type
cable.
Note:
The
Channel
Select
switch
on
the
front
panel
of
the
BBE
381
will
be
disabled
while
the
footswitch
is
connected.
CHANNEL
SELECT
FOOTSWITCH
IMPORTANT:
The
front
panel
channel
select
switch
will
be
defeated
when
the
footswitch
is
connected.
The
Footswitch
is
for
selecting
either
the
Clean
or
the
Distortion
Channels.
Using
the
front
panel
LED’s
as
reference
indicators,
the
“GREEN”
LED
will
illuminate,
indicating
that
the
Clean
Channel
has
been
selected.
Depressing
the
switch
will
illuminate
the
“RED”
LED,
indicating
that
the
Distortion
Channel
has
been
selected.
Note:
Upon
connecting
the
Footswitch
to
the
BBE
381
Guitar
Pre-amp,
the
operational
channel
will
be
that
of
the
last
selection
determined
by
the
user
or
factory
and
is
changeable
at
any
time.
SPECIFICATIONS
Power
Requirements:
U.S.
&
Canadian
models:
120VAC,
50/60Hz,
8
WATTS
Standard
model:
220VAC,
50/60Hz,
8
WATTS
Fuse:
Replace
with
the
same
type
FAST
BLOW
fuse.
U.S.
and
Canadian
models:
250Vac,
1/2A
Fast
blow
type
fuse
Standard
model:
250Vac,
.125A
Fast
blow
type
fuse
Dimensions:
19”(W)
x
5.5”(D)
x
1.7”(H)
Shipping
Weight:
9lbs.
A_
GB\IERAL
OPERATION
In
order
to
reduce
the
risk
of
damage
to
any
equipment,
properly
connect
all
cables
and
power
cords
before
turning
on
any
components
in
the
system.
Most
important
of
all,
ALWAYS
TURN
ON
THE
POWER
AMPLIFIER
LAST
TO
AVOID
DAMAGING
THE
SPEAKERS.
Select
either
the
Clean
or
the
Distortion
channel
via
the
front
panel
switch
or
the
Footswitch.
Next,
adjust
the
tone
controls
to
achieve
the
desired
frequency
response.
The
tone
controls
are
specifically
tailored
for
their
respective
channels
with
passive
circuitry
for
the
Clean
channel
and
active
circuitry
for
the
Distortion
channel
to
insure
accurate,
no
bleed
through,
adjustment
from
one
tone
control
to
the
next.
Used
with
a
variety
of
guitars
and
pick-up
configurations,
the
BBE
381
Guitar
Pre-amp
is
able
to
achieve
almost
any
tone
desired.
The
BBE
process
is
a
unique
feature
that
only
BBE
Guitar
Pre-amps
possess.
The
BBE
process,
most
noted
for
its
ability
to
increase
the
clarity
and
the
tonal
quality
of
the
music
program,
is
achievable
without
adding
any
unwanted
noise
or
harmonic
distortion.
Use
this
feature
as
an
extension
of
the
tone
controls
and
as
a
means
of
improving
the
overall
tonality
of
the
guitar’s
signal.
Use
the
front
panel
switch
to
compare
the
processed
to
unprocessed
sound.
The
advantage
of
having
the
BBE
process
will
be
further
emphasized
when
used
in
conjunction
with
effects
processors.
The
Master
Volume
controls
are
separate
for
each
of
the
right
and
left
outputs.
This
will
allow
the
guitar
player
added
flexibility
when
playing
live.
If
the
guitar
player
is
utilizing
the
system
in
a
stereo
configuration,
it
is
possible
to
achieve
an
adequate
volume
mix
from
side
to
side.
Any
volume
differences,
whether
created
by
different
impedance
speaker
cabinets
or
by
an
effects
processor
can
be
accommodated
quickly
and
easily.
Note:
The
Master
Volumes
will
affect
the
Main
Outputs
and
Record
Outputs
simultaneously.
The
Record
Outputs
are
a
welcome
feature
for
any
guitar
player
who
is
constantly
mobile
or
where
space
and
volume
levels
are
prohibitive.
The
connection
of
the
BBE
381
Guitar
Pre-amp
directly
to
a
mixing
console
or
tape
recorder
while
maintaining
a
warm
guitar
cabinet
sound
is
now
possible.
Additionally,
the
inconvenience
of
“miking”
or
transporting
a
guitar
speaker
cabinet
is
eliminated.
The
Effects
Loop
on
the
BBE
381
Guitar
Pre-amp
will
accommodate
any
rack-mount
or
pedal
effects
processor.
The
effects
send
level
will
vary
depending
on
the
tone
and
volume
control
settings.
Use
the
following
illustrations
to
provide
elementary
configurations
and
tone
control
settings.
A
_
SUBGESTED
TONE
SETTINGS
USING
THE
BBE
381
GUITAR
PRE-AMP
WITH
“SINGLE
COIL”
TYPE
PICK-UPS
o
o
CLEAN
CHANNa
niCT
DISTORTION®
CHANNEL
MASTER
ON
USING
THE
BBE
381
GUITAR
PRE-AMP
WITH
“HUMBUCKING”
TYPE
PICK-UPS
o
o
CLEAN
CHANNEL
‘saf^
DISTORTION®
CHANNEL
MASTER
®
O
IMW.
®
o
Note:
Use
these
settings
as
a
starting
point.
Your
finai
resuits
may
vary
due
to
the
guitar’s
unique
tonal
characteristics.
8
A
_
SUGGESTED
EQUIPMENT
CQNFIGURATIONS
USING
THE
MAIN
OUTPUTS
OF
THE
BBE
381
GUITAR
PRE-AMP
The
BBE
381
can
accommodate
the
level
requirements
of
both
the
‘1ront
end”
of
a
guitar
amplifier
and
the
input
of
a
power
amplifier.
USING
THE
RECORD
OUTPUTS
OF
THE
BBE
381
GUITAR
PRE-AMP
In
situations
where
“miking”
a
guitar
cabinet
is
impractical,
the
Recording
Outputs
will
alleviate
that
burden.
Its
special
speaker
voicing
circuit
will
eliminate
the
“buzz”
normally
associated
with
plugging
a
guitar
pre-amp
directly
into
a
mixing
console.
10
USING
THE
BBE
381
GUITAR
PRE-AMP
WITH
OTHER
INSTRUMENTS
Mixing
Con
so
I
e
Experiment
with
the
BBE
381
on
keyboards
or
any
other
instruments
to
create
new
and
exciting
sounds!
11
A_
SERVICE
We
recommend
that
if
at
all
possible
a
BBE
381
Guitar
Pre-amp
which
requires
service
be
sent
to
our
facility
in
Huntington
Beach,
CA.
We
request
that
a
“RETURN
AUTHORIZATION”
be
issued
by
the
dealer
from
whom
you
purchased
the
unit.
If
this
is
not
possible,
call
BBE
Sound,
Inc.
directly
at
(714)
897-6766,
to
obtain
a
“RETURN
AUTHORIZATION.”
Include
a
copy
of
the
bill
of
sale
with
the
unit
when
it
is
shipped
to
BBE
Sound
Inc.,
so
that
the
service
process
can
be
expedited.
As
the
repair
turnaround
time
is
minimal,
we
request
that
the
unit
be
sent
BBE
Sound,
Inc.
This
helps
us
add
reliability
data
to
our
files
for
use
in
designing
future
products.
WARRANTY
Warranty
registration
of
the
unit
to
BBE
Sound
Inc.
is
not
necessary.
However,
it
is
strongly
recommended
that
a
copy
of
the
bill
of
sale
is
retained
for
future
reference.
IT
IS
THE
SOLE
RESPONSIBILITY
OF
THE
END
USER
TO
PROVIDE
THE
BILL
OF
SALE
OR
OTHER
MEANS
OF
PROOF
OF
PURCHASE
TO
VALIDATE
THE
WARRANTY
IF
WARRANTY
SERVICE
IS
REQUIRED.
The
BBE
381
Guitar
Pre-amp
is
warranted
against
defects
in
material
and
workmanship
for
a
period
of
one
(1)
year
from
date
of
purchase
from
BBE
Sound,
Inc.
or
from
an
authorized
dealer.
During
this
period,
we
will
repair
units
free
of
charge
providing
that
they
are
shipped
prepaid
to
BBE
Sound,
Inc.,
5500
Bolsa
Ave,
Suite
245,
Huntington
Beach,
CA
92649.
We
will
pay
return
UPS
shipping
charges
within
the
USA.
All
charges
related
to
non-US
shipping,
including
customs
clearance,
will
be
billed.
The
warranty
will
be
honored
for
the
longer
of
either
90
days
from
the
date
of
any
service
or
the
remainder
of
the
original
1
Year
factory
warranty.
This
warranty
will
be
considered
null
and
void
by
BBE
Sound,
Inc.
if
any
of
the
following
is
found:
1.
The
equipment
has
been
physically
damaged.
2.
The
equipment
shows
signs
of
abuse.
3.
The
equipment
has
been
electrically
damaged
by
improper
connection
or
attempted
repair
by
the
customer
or
a
third
party.
4.
The
equipment
has
been
modified
without
authorization.
5.
The
bill
of
sale
indicates
that
the
purchase
date
of
the
equipment
is
not
within
the
warranty
period.
All
non-warranty
repairs
are
warranted
for
a
period
of
90
days
from
the
date
of
service.
BBE
Sound,
Inc.
is
NOT
LIABLE
FOR
CONSEQUENTIAL
DAMAGES.
Should
the
pre-amp
fail
to
operate
for
any
reason,
our
sole
obligation
is
to
repair
the
unit
as
described
above.
MAINTENANCE
Maintenance
of
the
BBE
381
Guitar
Pre-amp
is
limited
to
proper
cleaning
of
the
unit
with
a
mild
household
cleaner
such
as
Formula
409^“
or
Windex^^
.
The
chassis
and
cover
are
steel
finished
with
a
durable
polyurethane
paint,
while
the
front
panel
is
an
anodized
aluminum
extrusion.
There
are
no
user
replaceable
parts
and
the
unit
should
not
be
opened
for
any
reason
unless
you
are
a
qualified
technician.
Calibration
should
be
performed
if
parts
are
replaced
or
if
a
performance
check-out
indicates
a
problem
with
calibration.
Long
term
use
has
shown
that
over
the
life
of
the
unit
there
is
little
or
no
drift
of
the
components
in
the
BBE
381
which
would
cause
a
change
in
calibration.
A
conservative
design
philosophy
has
resulted
in
equipment
which
should
give
years
of
trouble-free
service.
12
PAGE
2
OF
6
PAGE
3
OF
6
PAGE
4
OF
6
14
15
ALL
PARTS
ENCLOSED
IN
DASHED
LINES
ARE
PANEL
MOUNTED
,
fllOK
FROM
PACE
4
5
uoi'j
FROM
LEFT
RETURN
OUT
;
^VRiZ
MASTER
OUTPUT
LEFT
16
MODEL
301
MASTER
AND
RECORD
OUTPUTS
FROM
EFFECTS
LOOP
R89
l.Ouf/SOV
17
BBE
SOUND
INCORPORATED
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