BBE 462 User manual
Sound
Inc-
MODEL
462
SONIC
MAXIMIZER
USER
MANUAL
Important
Safeguards
WARNING
A
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
alert
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
equilateral
triangle
is
intended
to
alert
the
user
to
the
presence
of
important
operating
and
maintenance
(servicing)
instructions
in
the
literature
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
pool.
Heat
-
Do
not
install
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.
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.
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.
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.
*
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.
Do
not
attempt
to
service
the
appliance
beyond
that
described
in
the
operating
instructions.
For
all
other
servicing,
refer
to
qualified
service
personnel
only.
TABLE
OF
CONTENTS
Precautions.I
Product
Description.1
Controls/Connections.2-4
General
Operation/Applications.5-10
Service/Warranty
Information.11
Calibration.12
Specifications.
.
.
.•.5
Schematic
Diagram.13-17
Congratulations
on
your
purchase
of
the
BBE
462
Sonic
Maximizer,
an
extremely
versatile,
two
channel
signal
processor
that
will
benefit
any
sound
reproduction
system.
Program
material
will
have
sparkle
and
unmistakable
clarity.
Lower
frequencies,
such
as
a
bass
guitar,
will
be
more
evident
in
the
mix.
Voices
will
be
crystal
clear.
Guitar
and
keyboard
notes
will
have
greater
integrity
and
be
more
distinct
from
each
other.
If
classical
music
is
your
forte,
listen
to
your
favorite
symphony
and
feel
as
though
you
are
the
conductor.
Rap
music
will
take
on
new
dimensions
with
a
thunderous,
yet
tight
thump
which
cannot
be
achieved
with
any
other
sound
processor.
The
BBE
462’s
flexible
design
will
allow
it
to
be
configured
into
any
system.
Whether
live
sound
reproduction
or
in
recording
studios,
the
BBE
462
will
be
a
welcome
addition.
The
following
features
will
make
the
BBE
462
attractive
to
sound
engineers,
players
and
listeners:
1.
Independent
PROCESS
and
LO
CONTOUR
control
for
each
channel
to
accommodate
mono
or
stereo
configurations.
2.
A
Function
Switch
to
allow
for
the
comparison
of
the
BBE
processed
signal
to
the
unprocessed
signal.
3.
Quarter
inch
Phone
jacks
and
RCA
connectors
to
allow
for
easy,
unbalanced
configuration
into
any
sound
system.
4.
Clip
LED
to
monitor
the
incoming
signal
level.
5.
A
four
level
LED
indicator
to
monitor
the
output
of
the
BBE
462
Sonic
Maximizer.
IMPORTANT
Before
you
begin,
please
check
the
contents
within
this
box
to
insure
that
included
are:
1
.
The
BBE
462
Sonic
Maximizer.
2.
Four
Rubber
Feet
for
"Table
Mount"
applications
3.
The
BBE
462
User’s
manual.
If
any
of
these
items
are
found
to
be
damaged
or
missing,
immediately
contact
the
BBE
dealer
from
whom
the
unit
was
purchased.
Before
you
begin,
please
read
this
manual.
It
will
help
you
use
the
BBE
462
more
effectively
and
answer
most
of
the
common
questions
that
our
service
department
receives.
But
if
you
still
have
questions,
please
call
our
service
department
at
(714)
897-6766.
i
HOW
THE
BBE
PROCESS
WORKS
The
BBE
Process
has
been
designed
to
make
music
programs
more
intelligible
and
life-like
than
normally
achieved
with
existing
audio
systems.
The
BBE
Process
works
dynamically
by
boosting
the
harmonic
content
of
the
music
program,
as
determined
by
the
signal
input,
and
imparting
a
linear
phase
shift
across
the
audio
spectrum.
The
phase
shift
allows
for
a
separation
of
the
high,
mid
and
low
frequencies
so
that
they
do
not
arrive
at
the
speaker
network
at
precisely
the
same
time.
This
prevents
the
higher
frequencies
from
being
smothered.
(As
the
phase
shift
is
minimal,
2
milliseconds,
it
is
not
perceived
as
a
delay
or
echo.)
The
amount
of
harmonic
amplification
is
variable
as
selected
by
the
PROCESS
knob,
to
achieve
crisp,
tight
music
program.
The
LO
CONTOUR
knob
is
a
bass
frequency
adjustment.
When
turned
clockwise,
the
LO
CONTOUR
will
add
power
and
warmth
to
the
music
program.
If
your
musical
tastes
require
the
bass
frequencies
be
reduced,
turn
the
knob
counter-clockwise.
Although
the
majority
of
the
process
is
achieved
with
the
higher
frequencies
of
the
music
program,
the
BBE
Process
will
make
a
significant
difference
with
the
entire
program.
For
example:
An
"A”
at
440Hz
on
a
guitar
is
fundamentally
the
same
note
as
an
"A"
at
440Hz
on
a
piano.
What
allows
a
listener
to
identify
the
respective
instruments
is
the
harmonic
content.
By
realigning
the
phase
relationship
and
amplitude
of
the
harmonic
frequencies,
the
distinctive
sound
of
a
guitar,
a
piano,
or
any
musical
instrument,
is
much
more
evident.
FRONT
PANEL
CONTROLS
AND
CONNECTIONS
NOTE:
BOTH
CHANNELS
OF
THE
BBE
462
ARE
INDEPENDENT
FROM
EACH
OTHER
AND
MAY
PROCESS
A
STEREO
SIGNAL
SOURCE
OR
TWO
INDEPENDENT
SIGNAL
SOURCES.
NO
DAMAGE
WILL
BE
INFLICTED
TO
THE
BBE
462
IF
ONLY
ONE
CHANNEL
IS
UTILIZED.
CHANNEL
A
1.
LED
DISPLAY:
The
LED
display
is
used
to
indicate
the
output
signal
level
of
the
BBE
462.
Each
number
on
the
front
panel
corresponds
to
the
output
signal
level,
measured
in
decibels.
Example:
The
"0"
indicates
a
OdBu
signal
level,
"-6"
refers
to
-6dBu,
and
so
on.
Once
an
input
signal
level
has
been
established,
increasing
the
BBE
PROCESS
and
LO
CONTOUR
will
increase
CHANNEL
A
cont.,
the
output
signal
and
cause
more
LEDs
to
illuminate.
The
Clip
LED
monitors
the
input
signal
level.
The
Clip
LED
will
illuminate
at
+15dBu,
giving
a
3dBu
warning
of
the
impending
distortion
at
+18dBu,
the
actual
clip
point.
2.
LO
CONTOUR:
Each
channel
is
equipped
with
a
LO
CONTOUR
control.
This
control
is
a
low
frequency
adjustment
for
the
BBE
462.
It
provides
a
boost
of
lOdBu
when
turned
to
its
maximum
position
(clockwise)
at
50Hz.
When
turned
to
its
minimum
position,
(counter-clockwise)
it
reduces
the
50Hz
signal
by
lOdBu.
The
middle
position
would
be
flat
or
no
change.
3.
BBE
PROCESS:
Each
channel
is
equipped
with
a
BBE
PROCESS
control.
This
control
adjusts
the
BBE
Process.
The
BBE
Process
gives
the
user
a
more
detailed
perception
of
tonality,
added
"bite"
and
an
increase
in
clarity.
The
low
frequency
range
of
the
program
material
will
be
tightened
while
the
high
end
will
be
crystal
clear
without
adding
or
creating
any
additional
noise
or
harmonic
distortion.
When
the
knob
is
in
its
minimum
position,
completely
counter-clockwise,
no
process
is
taking
effect.
Turning
the
knob
clockwise
will
introduce
the
BBE
Process.
Adjust
the
knob
to
mix
the
desired
amount
of
BBE
Process
to
suit
your
taste.
The
BBE
Process
also
has
its
own
in/out
switch
for
comparison
of
the
processed
to
unprocessed
signal
located
on
the
front
panel.
Experiment
with
the
process.
Use
the
BBE
Process
as
an
extension
of
the
tone
controls.
The
BBE
Process
is
not
an
effect,
but
a
sonic
improvement.
To
start,
set
the
BBE
PROCESS
knob
to
its
12
o’clock
position,
then
adjust
accordingly.
4.
FUNCTION:
This
switch
engages
the
BBE
Process.
When
depressed,
the
"IN"
position,
the
"GREEN"
LED
will
illuminate,
indicating
that
the
BBE
Process
has
been
engaged.
When
in
the
"OUT"
position,
the
"YELLOW"
LED
will
illuminate,
indicating
that
the
BBE
Process
has
been
disengaged.
5.
CHANNEL
B:
These
controls
function
the
same
as
the
CHANNEL
A.
6.
POWER:
This
switch
applies
AC
power
to
the
BBE
462
Sonic
Maximizer.
When
the
Power
Switch
is
in
the
"ON"
position,
either
the
"GREEN"
or
"YELLOW"
Function
LED
will
illuminate,
as
determined
by
the
Function
Switch,
to
indicate
that
power
has
been
applied.
When
the
Power
Switch
is
not
in
the
"ON"
position,
neither
of
the
Function
LED
swill
illuminate.
3
REAR
PANEL
1.
POWER
CORD:
U.S.
Configuration:
This
is
a
standard
two-pronged,
polarized
AC
power
cable
for
connection
to
any
standard
polarized
HOVac
outlet.
Plugs
for
other
national
configurations
will
vary.
2.
FUSE:
Replace
ONLY
with
same
type
Fastblow
fuse.
U.S.,
Canada
and
Japan
models:
250Vac,
1/2A
Fastblow
Standard
model:
250Vac,
.125A
Fastblow
CHANNEL
B
3.
OUTPUT:
The
output
of
the
BBE
462
can
be
taken
from
the
1/4"
Phone
Jack
or
the
RCA
Jack.
Both
are
unbalanced
and
are
the
same
point
electronically.
This
allows
both
outputs
to
be
used
simultaneously,
eliminating
the
need
for
a
"Y“
cord
in
the
event
multiple
outputs
are
required.
The
recommended
single
load
impedance
is
at
least
10k
Ohms.
If
both
outputs
are
being
used,
a
minimum
of
a
22k
Ohm
load
per
device
is
required.
(The
"load"
is
determined
by
the
input
impedance
of
the
next
subsequent
component
in
the
signal
chain.)
The
maximum
output
is
rated
at
+18dBu.
The
output
impedance
of
the
BBE
462
is
1
k
ohms.
NOTE:
Actual
output
level
will
vary
due
to
the
selected
position
of
the
BBE
Process,
and
the
actual
input
signal
level.
4.
INPUT:
The
input
of
the
BBE
462
is
an
unbalanced
connection.
Although
is
can
be
either
a
1/4"
Phone
Plug
or
an
RCA
Plug,
it
is
recommended
that
only
one
input
source
is
used.
Both
jacks
are
the
same
point
electronically,
however,
due
to
the
input/output
impedance
characteristics
of
most
audio
devices,
a
loss
of
signal
may
occur
and/or
damage
to
a
component
if
both
inputs
are
utilized.
The
input
impedance
of
the
BBE
462
is
47k
Ohms.
The
maximum
signal
input
level
is
+18dBu.
5.
CHANNEL
A:
These
controls
function
the
same
as
the
CHANNEL
B.
4
SPECIFICATIONS
Frequency
Response,
process
mode:
bypass
mode:
Noise:
THD,
process
mode:
bypass
mode:
Maximum
Output:
Input
Impedance:
Output
Impedance:
Sensitivity:
Maximum
Process:
Lo
Contour:
*
OdBu
=
0.775mVrms
Power
Requirements:
U.S.,
Canada
&
Japan
models:
120VAC,
50/60Hz,
8
WATTS
Standard
model:
220VAC,
50/60Hz,
8
WATTS
Fuse:
Replace
with
the
same
type
FASTBLOW
fuse
U.S.,
Canada
&
Japan
models:
250Vac,
1/2A
Fast
blow
type
fuse.
Standard
model:
250Vac,
.125A
Fastblow
type
fuse
Dimensions:
19"(W)
x
5.5"(D)
x
1.7"(H)
Shipping
Weight:
6.5lbs.
Note:
Due
to
continuing
product
improvement,
specifications
and
design
are
subject
to
change
without
notice.
Program
controlled
20Hz
to
20kHz,
+/-
0.5dBu,
-lOdBu
input
-90dBu
less
than
0.025%
at
-lOdBu
input,
20-20kHz
less
than
0.002%
at
-lOdBu
input,
20-20kHz
+18dBu
(may
vary
due
to
control
settings)
47k
Ohms,
unbalanced
1/4”
phone
jack
or
RCA
jack
Ik
Ohms,
unbalanced
1/4"
phone
jack
or
RCA
jack
-45dBu
for
maximum
process
+10dBu
boost
at
5kHz,
-lOdBu
input
+10/-10dBu
adjustment
at
50Hz,
-lOdBu
input
GENERAL
OPERATION
THE
BBE
462
IS
A
LINE
LEVEL
SIGNAL
PROCESSOR
AND
IS
TO
BE
CONNECTED
PRIOR
TO
THE
POWER
AMP
IN
ANY
AUDIO
SYSTEM.
SIGNIFICANT
DAMAGE
MAY
BE
INFLICTED
TO
THE
BBE
462
OR
ANY
SUBSEQUENT
COMPONENT
IN
THE
SYSTEM
IN
THE
EVENT
THE
OUTPUT
OF
A
POWER
AMP
IS
CONNECTED
DIRECTLY
TO
THE
BBE
462.
In
order
to
reduce
the
risk
of
damage
to
any
equipment,
properly
connect
all
cables
and
power
cables
before
turning
on
any
components
in
the
system.
Most
important
of
all,
ALWAYS
TURN
ON
THE
POWER
AMPLIFIER
LAST
TO
AVOID
DAMAGING
THE
SPEAKERS
OR
THE
AMP.
The
BBE
462
may
be
utilized
in
a
number
of
different
environments
and
its
results
may
vary
accordingly.
Because
both
channels
are
completely
independent
from
each
other,
only
one
channel
of
the
BBE
462
may
be
used,
or
each
channel
processing
a
different
signal
source.
The
effects
loop
is
the
ideal
placement
in
the
signal
chain
of
a
guitar
application.
In
a
pre-amp,
keyboard
or
P.A.
application,
the
BBE
462
works
best
as
the
last
component
in
the
signal
chain,
just
before
the
crossover
or
power
amp.
Important:
In
a
P.A.
application,
never
connect
the
BBE
462
into
the
effects
loop.
The
inherent
phase
shift
of
the
BBE
Process
will
cause
phase
cancellation
resulting
in
a
partial
loss
of
signal.
BBE
AND
EQUALIZATION
The
most
common
question
asked
of
the
BBE
Sound,
Inc.
service
department
is:
"Where
does
the
BBE
Processor
connect
in
the
signal
chain,
before
or
after
the
equalizer?"
Many
people
find
that
the
same
amount
of
equalization
is
no
longer
needed,
if
at
all,
when
a
BBE
processor
is
used.
Additionally,
the
amount
of
equalization
used
will
help
determine
the
BBE
462’s
proper
location
in
the
signal
chain:
If
the
EQ
is
being
set
to
give
the
room
a
flat
response
as
determined
by
a
spectrum
analyzer,
the
BBE
462
will
work
properly
before
or
after
the
EQ.
(Placing
the
BBE
462
after
the
EQ
is
recommended.)
If
the
EQ
is
being
used
for
drastic
tone
alteration,
the
recommended
placement
would
be
before
the
EQ.
Neither
of
these
configurations
will
harm
the
BBE
462.
When
the
BBE
462
is
being
used
in
a
single
instrument
application,
guitar,
keyboards,
etc.,
it
may
be
advantageous
to
experiment
with
the
proper
placement
of
the
BBE
in
the
signal
chain.
The
BBE
462
will
improve
the
sonic
quality
of
the
instrument
and
any
effects
that
may
be
present
as
well.
Important:
Generally,
reverb
and
delay
do
not
affect
the
BBE
negatively.
However,
it
is
possible
that
with
a
large
amount
of
effects
added
to
an
instrument
that
the
BBE
may
process
irregularly.
If
this
occurs,
reconnect
the
BBE
462
as
the
first
item
in
the
processor
chain.
Use
the
following
illustrations
as
a
starting
point
for
proper
placement
of
the
BBE
462.
5
LIVE
APPLICATION:
NON
POWERED
MIXER
PA
CABINET
PA
CABINET
Connect
the
BBE
462
to
the
output
of
the
mixing
console.
The
output
of
the
BBE
will
drive
either
a
crossover
or
a
power
amp
directly.
(If
an
equalizer
is
being
used,
refer
to
"BBE
AND
EQUALIZATION"
section
under
"GENERAL
OPERATION.")
6
LIVE
APPLICATION:
POWERED
MIXER
PA
CABINET
BBE
462
SONIC
MAXIMIZER
There
are
a
couple
of
ways
to
configure
the
BBE
462
into
a
powered
mixer.
The
ideal
method
would
be
into
“Pre-Amp
Out
/
Power
Amp
In"
section
of
the
console.
If
your
console
does
not
have
this
option,
use
the
main
or
channel
insertion
points.
7
RECORDING
L^-J
L^J
L>-J
L^J
©©©©©©©©
©©©©©©O©
O
O
O
HHHH
H
MIXING
CONSOLE
16
TRACK
RECORDING
The
BBE
462
can
be
utilized
in
the
recording
studio
on
individual
instruments
or
on
groups
of
instruments
to
improve
the
sound
quality.
MASTERING
OR
DUBBING
16
TRACK
RECORDING
-
1
Li_J
Li_J
L^-H
'
'
1
OOOOOO©®
till
©©©©©©©©
ITTT
©©©©©©©©
©©©
HHHH
H
•
1
1
^
_
-
MIXING
CONSOLE
BBE
462
SONIC
MAXIMIZER
I
'
o
n
o
fSc
iiiogs9Qo
eaeeBB
U
OO
00
™
JXUgr
HHU
Wfl
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CASSETTE
DECK
Use
the
BBE
462
for
mastering
the
recording.
Even
if
the
BBE
Process
has
been
used
on
individual
tracks,
an
improvement
of
the
total
mix
will
be
noticed.
8
INDIVIDUAL
INSTRUMENTS
BBE
462
SONIC
MAXIMIZER
4
X
12"
CABINET
4
X
12"
CABINET
Use
the
BBE
462
in
effects
loop
or
the
main
output
of
a
guitar
pre-amp.
For
keyboards,
the
output
of
the
sub-mixer
will
be
the
ideal
location.
9
SOUND
CONTRACTORS
The
BBE
462
will
accept
the
output
level
of
most
sound
contractor
type
mixers.
D.J.
APPLICATION
BBE
462
SONIC
MAXIMIZER
SERVICE
We
recommend
that
if
at
all
possible
a
BBE
462
Sonic
Maximizer
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
directly
to
BBE
Sound,
Inc.
This
helps
us
add
reliability
data
to
our
files
for
use
in
designing
future
products.
MAINTENANCE
Maintenance
of
the
BBE
462
Sonic
Maximizer
is
limited
to
proper
cleaning
of
the
unit
with
a
mild
household
cleaner
such
as
Formula
409
tm
or
Windex
tm
.
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
462
which
would
cause
a
change
in
calibration.
A
conservative
design
philosophy
has
resulted
in
a
piece
of
equipment
which
should
give
years
of
trouble-free
service.
WARRANTY
Warranty
registration
of
the
unit
to
BBE
Sound,
Inc.
is
not
necessary.
However,
It
is
strongly
recommended
that
you
retain
a
copy
of
the
bill
of
sale
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
462
Sonic
Maximizer
is
warranted
against
defects
in
material
and
workmanship
for
a
period
of
five
(5)
years
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.
5381
Production
Drive,
Huntington
Beach,
CA
92649.
We
will
pay
return
UPS
shipping
charges
within
the
USA.
All
charges
related
to
non-UPS
shipping,
including
customs
clearance,
will
be
billed.
The
warranty
will
be
hon¬
ored
for
the
longer
of
either
90
days
from
the
date
of
any
service
or
the
remainder
of
the
original
5
Year
factory
warranty.
This
warranty
will
be
consider
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
sales
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
unit
fail
to
operate
for
any
rea¬
son,
our
sole
obligation
is
to
repair
it
as
described
above.
li
CALIBRATION
PROCEDURE
FOR
THE
BBE
462
NOTE:
THIS
UNIT
WAS
CALIBRATED
AT
THE
FACTORY.
THIS
PROCEDURE
IS
FOR
QUALIFIED
SERVICE
PERSONNEL
ONLY.
Equipment
Required:
Audio
Signal
Generator
(sine
wave)
Revision
A.1
Digital
Voltmeter
(DVM)
July
28,1992
This
procedure
details
the
calibration
of
channel
A.
Comments
[in
brackets]
pertain
to
channel
B.
All
tests
are
done
with
a
signal
level
of
-lOdBu
(245Vrms)
unless
otherwise
noted.
The
signal
will
be
input
into
the
1/4“
connector
marked
INPUT
The
DVM
shall
monitor
the
1/4"
connector
of
each
corresponding
channel
marked
OUTPUT.
INITIAL
SETTINGS:
1
)
BBE
PROCESS
controls
VR4
[VR8]
to
minimum.
2)
Turn
VR1
[VR5],
VR2
[VR6]
and
VR3
[VR7]
to
their
middle
positions.
3)
POWER
switch
ON
and
FUNCTION
switch
IN
(process
on).
PROCEDURE:
OFFSET
ADJUSTMENT:
1)
The
unit
should
be
on
and
the
voltage
regulators
should
be
warm
to
the
touch.
2)
With
no
signal
present
at
the
input
(open,)
measure
TP1
[TP2]
with
the
DVM
set
to
DC
volts.
3)
Adjust
VR1
[VR5]
until
DVM
reads
O.OOVDC.
POWER
SUPPLY
TEST:
1
)
With
DVM
set
to
DC
volts
measure
the
positive
end
of
C59.
It
should
be
less
then
+30VDC.
2)
With
DVM
set
to
DC
volts
measure
the
negative
end
of
C60.
It
should
be
less
then
-30VDC.
3)
With
DVM
set
to
DC
volts
measure
pin-8
of
U2.
You
should
read
+15VDC
(+/-
0.5VDC).
4)
With
DVM
set
to
DC
volts
measure
pin-4
of
U2.
You
should
read
-15VDC
(+/-
0.5VDC).
UNITY
ADJUSTMENT:
(Note:
VR4
[VR8]
to
minimum)
1)
Input
a
5000Hz
signal
(@
-lOdBu)
into
the
connector
marked
CHANNEL
A
[B]
INPUT.
2)
Measure
the
connector
marked
OUTPUT
CHANNEL
A
[B]
with
the
DVM
3)
Adjust
VR2
[VR6]
until
the
DVM
reads
-10.5
dBu.
4)
Set
generator
to
500Hz
(@
-1
OdBu).
5)
The
DVM
should
read
-10.5
(+/-0.5d8u).
LO
CONTOUR
TEST:
1)
Input
a
50Hz
signal
(@
-1
OdBu)
into
the
connector
marked
CHANNEL
A
[B]
INPUT.
2)
Measure
the
connector
marked
OUTPUT
CHANNEL
A
[B]
with
the
DVM
set
to
AC
volts.
3)
Turn
the
LO
CONTOUR
control
completely
clockwise
(marked
V).
The
DVM
should
read
+1dBu.(+/-
I.OdBu)
4)
Turn
the
LO
CONTOUR
control
completely
counter-clockwise
(marked
"-").
The
DVM
should
read
-22.5dBu„(+/-1.0dBu)
5)
Turn
the
control
to
the
middle
position.
The
DVM
should
read
approximately
-8.5dBu
(+/-
I.OdBu).
DETECTOR
CHECK:
(Note:
The
BBE
PROCESS
control
must
be
completely
minimum)
1
)
Input
a
500Hz
signal
@
-lOdBu
into
the
connector
marked
CHANNEL
A
[B]
INPUT.
2)
With
DVM
measure
TP1
[TP2]
you
should
read
-1.700VDC
(+/-0.050VDC)
3)
Change
the
source
to
500Hz,
-35dBu).
With
DVM
measure
TP1
[TP2]
you
should
read
-0.675VDC
(+/-
0.050VDC)
4)
Turn
the
BBE
PROCESS
knob
completely
clockwise
to
maximum.
The
output
should
read
-t-ldBu
(+/-1dBu.)
BYPASS
TEST:
1)
Switch
the
FUNCTION
switch
OUT
(bypass
mode).
2)
Input
a
500Hz
signal
(@
-lOdBu)
into
the
connector
marked
CHANNEL
A
[Bj
INPUT.
3)
Measure
the
connector
marked
OUTPUT
CHANNEL
A
[B]
with
the
DVM
set
to
AC
volts.
4)
The
DVM
should
read
-lOdBu
(+/-0.5dBu).
LED
TEST:
1
)
Input
a
5000Hz
signal
@
-20dBu
(77.5mVrms)
into
the
connector
marked
CHANNEL
A
[B]
INPUT.
The
"YELLOW,"
-20
LED
should
light.
2)
Change
the
input
signal
to
-lOdBu
(245mVrms.)
The
"YELLOW,"
-12
LED
should
light.
3)
Change
the
input
signal
to
-5dBu
(435mVrms.)
The
"GREEN,"
-6
LED
should
light.
4)
Change
the
input
signal
to
OdBu
(775mVrms.)
The
"GREEN,"
0
LED
should
light.
5)
With
the
FUNCTION
switched
to
the
IN
position
the
corresponding
"GREEN"
LED
should
light.
6)
With
the
FUNCTION
switched
to
the
OUT
position
the
corresponding
"YELLOW"
LED
should
light.
CLIP
INDICATOR
TEST:
1)
Input
a
500Hz
signal
with
an
amplitude
of
+15dBu
(4.356Vrms)
into
the
connector
marked
INPUT
CHANNEL
A
[B].
Insure
the
corresponding
CUP
LED
is
fully
lit
for
each
channel.
2)
Change
the
input
signal
level
to
+14dBu
(3.882Vrms.)
The
CLIP
LED
should
not
be
lit
for
each
channel.
RCA
CONNECTOR
TEST:
1)
Switch
the
FUNCTION
switch
OUT
(bypass
mode).
2)
Input
a
500Hz
signal
(@
-1
OdBu)
into
the
RCA
connector
marked
CHANNEL
A
[B]
INPUT.
3)
Measure
the
RCA
connector
marked
OUTPUT
CHANNEL
A
[B]
with
the
DVM
set
to
AC
volts.
4)
The
DVM
should
read
-lOdBu
(+/-0.5dBu).
5)
Return
the
FUNCTION
switch
to
the
IN
position
(process
mode).
DC
VOLTAGE
AT
OUTPUT
TEST:
1
)
Measure
the
output
jacks
to
ground
with
the
DVM
set
to
DC
volts
the
voltage
must
be
less
then
lOmVDC.
OFFSET
DRIFT
TEST:
1
)
With
no
signal
present
at
the
input
(open)
measure
TP1
[TP2)
with
the
DVM
set
to
DC
volts.
2)
Insure
this
voltage
is
O.OOVDC
{+/-
25mVDC)
END
TEST
12
BBE
462
SONIC
MAXIMIZER
Quf/25V
NP
♦
1SVDC
MODEL
462
POWER
SUPPLY
R74
21.5K/1X
BSE
Sound
Incorporated
Sound
Inc.
CALIFORNIA,
U.S.A.
(714)897-6766
*
FAX(714)895-6728
BBE
is
a
registered
trademark
of
BBE
Sound,
Inc.
Covered
by
U.S.
Patent
4,482,866
and
other
U.S.
and
foreign
patents
pending.
BBE
is
the
registered
trademark
of
BBE
Sound,
Inc.
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