BBE 422 User manual
Important
Safeguards
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.
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.
Congratulations!
Thank
you
for
buying
the
BBE
Model
422
MAXIE
Sonic
Maximizer.
You
now
own
a
very
unique
signal
processing
device
with
no
other
equal
in
the
audio
world.
Whether
you
purchased
the
BBE
422
for
your
home
studio
or
club
P.A.
system,
you
will
find
the
unit’s
rugged
construction
and
careful
electronic
design
a
welcome
addition
to
your
audio
system.
This
manual
will
help
you
use
the
BBE
422
more
effectively
and
in
ways
of
which
you
may
not
be
aware.
Review
of
the
information
contained
in
this
owner's
manual
will
answer
most
of
the
common
questions
that
our
service
department
receives.
But
if
you
still
have
questions,
please
feel
free
to
call
toll-free
(in
USA)
1-800-233-8346
or
(in
CA)
1-800-558-3963.
The
BBE
™
Process
—
“What
Is
It?”
Loudspeakers
have
difficulty
dealing
with
the
electronic
signals
supplied
by
an
amplifier.
These
difficulties
cause
such
major
phase
and
amplitude
distortion
that
the
sound
reproduced
by
a
speaker
differs
significantly
from
the
sound
produced
by
the
original
source.
In
the
past,
these
problems
have
proved
unsolvable
and
were
thus
relegated
to
a
position
of
secondary
importance
in
audio
system
design.
However,
phase
and
amplitude
integrity
is
essential
to
accurate
sound
reproduction.
Research
shows
that
the
information
which
the
listener
translates
into
the
recognizable
characteristics
of
a
live
performance
are
intimately
tied
into
the
complex
time
and
amplitude
relationships
between
the
fundamental
and
harmonic
components
of
a
given
musical
note
or
sound.
These
relationships
define
a
sound’s
“sound”.
When
these
complex
relationships
pass
through
a
speaker,
the
proper
order
is
lost.
The
higher
frequencies
are
delayed.
A
lower
order
frequency
may
reach
the
listener’s
ear
first
or
perhaps
simultaneously
with
that
of
a
higher
frequency.
In
some
cases,
the
fundamental
components
may
be
so
time-shifted
that
they
can
reach
the
listener’s
ear
ahead
of
some
or
all
the
harmonic
components.
This
change
in
the
phase
and
amplitude
relationship
of
the
harmonic
and
fundamental
frequencies
is
technically
called
“envelope
distortion”.
The
listener
perceives
this
loss
of
sound
integrity
in
the
reproduced
sound
as
“muddy”
and
“smeared”.
In
the
extreme,
it
can
become
difficult
to
tell
the
difference
among
musical
instruments,
for
example,
an
oboe
and
a
clarinet.
BBE
Sound,
Inc.
conducted
extensive
studies
of
numerous
speaker
systems
over
a
ten
year
period.
With
this
knowledge
it
became
possible
to
develop
an
ideal
speaker
and
to
distill
the
corrections
necessary
to
return
the
fundamental
and
harmonic
frequency
structures
to
their
correct
order.
While
there
are
differences
among
various
speaker
designs
in
the
magnitude
of
their
needs
for
correction,
the
overall
pattern
of
correction
needed
is
remarkably
consistent.
The
BBE
™
process
is
so
unique
that
42
patents
have
been
awarded
by
the
U.S.
Patent
Office.
“How
It
Works”
The
BBE
™
process
imparts
a
pre-determined
phase
correction
to
the
high
frequencies
where
most
harmonic
information
exists.
This
is
done
by
breaking
the
signal
into
three
sub-bands
or
groups:
the
low
frequency
group
which
is
crossed
over
at
150Hz,
the
mid-range
group
which
is
crossed
over
at
1200Hz
and
the
high
frequency
group
that
handles
everything
else
up
to
20kHz.
The
low
group
is
delayed
about
2.5
ms
(milliseconds)
via
group
delay
within
a
passive
low
pass
filter.
The
front
panel
control
allows
for
either
a
flat
response
or
a
boost
of
the
lows
at
50Hz.
The
mid-range
group
is
delayed
only
about
0.5
ms
and
passes
through
an
active
band-pass
filter.
The
mid
group
is
used
as
a
point
of
reference
to
make
dynamic
amplitude
corrections
in
both
positive
and
negative
directions
to
the
high
frequency
group
which
has
been
passed
through
a
high
quality
VCA
(Voltage
Controlled
Amplifier).
Two
RMS
average
loudness
detectors
continuously
monitor
both
the
mid-range
and
high
frequencies
to
compare
the
relative
harmonic
content
levels
of
the
two
bands
and
apply
the
appropriate
amount
of
control
voltage
to
the
VCA,
thereby
determining
the
amount
of
high
frequency
harmonic
content
present
at
the
final
output
of
the
BBE
™
processor.
Product
Description
The
BBE
422
is
an
intelligent
audio
processor
designed
to
solve
a
series
of
complex
problems
as
described
in
the
previous
section.
It
is.
however,
very
simple
to
set
up
and
operate
and
once
installed
will
function
flawlessly
without
further
attention.
It
is
a
dual
channel,
rack-mountable
device
for
use
in
-lOdBu
unbalanced
line
level
applications
such
as
those
found
in
semi-
professional
and
musical
instrument
applications.
The
BBE
422
takes
up
one
EIA
standard
rack
space
of
19
inches
width
and
1.75
inches
height
(1U).
There
are
two
completely
separate
channels
to
allow
for
either
full
stereo
program
or
two
independent
mono
channels
such
as
a
house
PA.
mix
feed
for
one
channel
and
the
stage
monitor
feed
for
the
other
channel.
BBE’"
applies
different
phase
correction
algorithms
to
three
separate
frequency
bands.
A
variable
front
panel
control
for
each
channel
allows
the
user
to
adjust
the
amount
of
process
desired.
Using
Your
New
BBE
422
BBE’"
is
a
process
to
be
added
before
all
other
mixing
of
reverb,
special
effects
or
equalization.
The
BBE
422
is
used
to
increase
the
clarity
and
intelligibility
of
the
program
material.
Unlike
many
aural
exciters
or
equalizers,
the
BBE
422
does
not
add
any
extra
noise
or
harmonics
to
the
sound.
Thus,
there
will
be
no
future
problems
in
duplication
or
mastering
caused
by
aberrant
high
frequency
distortion.
Since
the
BBE
™
technology
is
a
single-stage
process
there
is
no
need
for
encoding
or
decoding.
Always
‘A-B”
the
processed
to
unprocessed
sound
with
the
Process
In/Out
switch
to
adjust
the
amount
of
processing
required.
Things
To
Remember
The
BBE
422
is
designed
to
work
in
-
lOdBu
levels.
This
is
suitable
for
most
semi-pro
mixers,
PA.
consoles,
home
stereos
or
disco
equipment.
The
BBE
422
drives
load
impedances
down
to
about
IK
Ohm
and
supplies
a
maximum
level
of
+14dBu.
The
inputs
and
outputs
are
unbalanced
types
and
input
to
the
BBE
422
should
be
kept
at
maximum
level.
Plugging
a
guitar
or
a
microphone
directly
into
the
BBE
422
will
not
work,
as
the
output
level
is
much
too
low.
In
this
application
a
BBE
401
can
be
used
as
it
accepts
low
level
devices.
If
the
program
material
has
excessive
background
noise,
the
noise
may
be
modulated
with
the
program.
In
this
case,
an
equalizer
or
some
type
of
noise
reduction
system
should
be
inserted
in
front
of
the
BBE
422
to
roll
off
the
noise
first.
Post¬
amplification
of
the
BBE
422
is
not
necessary
and
not
recommended,
as
the
BBE
422
can
drive
any
semi-pro
gear
with
-lOdBu
input
to
full
level
directly.
This
assumes
that
the
BBE
422
is
operating
in
the
aforementioned
fashion
with
-lOdBu
input
levels.
WARNING!
It
is
good
practice
to
turn
on
any
effects
boxes
such
as
BBE,
equalizers,
expanders,
surround
sound
accessories,
etc.,
and
the
preamp
BEFORE
turning
on
the
power
amplifier.
Otherwise
damage
to
the
speakers
may
result.
Applications
Various
applications
of
the
BBE
™
process
include:
Music
and
P.A.
System
The
BBE
422
has
become
a
popular
addition
to
many
PA.
systems
because
it
makes
a
drastic
improvement
to
the
clarity
of
the
vocals
without
the
usual
excessive
brightness
associated
with
equalizers.
In
addition,
the
intelligibility
of
the
monitor
mix
is
greatly
improved
with
the
BBE
™
process.
The
BBE
422
is
inserted
between
the
console
output
buss
and
the
next
stage
of
amplification
in
the
PA.
system,
if
the
BBE
™
process
is
desired
on
the
entire
mix.
The
BBE
422
unit
is
placed
before
any
house
graphic
equalizers.
All
pink
noise
checks
should
be
made
with
the
BBE
™
unit
switched
“out”
to
obtain
the
desired
house
curve.
The
BBE
™
process
is
then
dialed
in
to
suit
the
music
production.
Extreme
console
equalization
normally
used
during
live
performance
may
be
reduced
due
to
the
dynamic
enhancement
effect
of
the
BBE
422.
The
BBE
422
is
unbalanced
input
and
output
and
the
user
should
be
aware
of
the
level
and
impedance
of
the
insert
point
to
insure
proper
operation
of
the
BBE
422.
With
this
in
mind,
the
BBE
422
may
be
inserted
in
many
places
within
the
console’s
signal
path
to
achieve
specialized
and
dramatic
result.
In
the
case
of
non-VCA
sub-groups,
the
BBE
422
is
inserted
between
“buss
out”
and
“sub-group
fader
in",
for
the
application
of
the
BBE
™
process
to
a
whole
group
of
vocal
microphones,
for
example.
If
the
BBE
™
process
is
to
be
used
on
only
one
microphone
source,
the
BBE
422
is
inserted
in
the
normal
“insert
send
and
receive”
points
as
a
limiter
or
equalizer
is
patched.
If
the
PA.
mixer
does
not
have
“insert
points”
or
if
the
mixer
is
a
powered-type
unit
without
any
way
of
interrupting
the
signal
path
before
the
power
amplifier,
then
the
BBE
401
unit
should
be
used.
The
BBE
401
accepts
low
levels
direct
from
microphones,
electric
guitars,etc.
and
interfaces
directly
to
the
PA.
mixer.
Figure
1
shows
the
BBE
422
in
a
PA.
system
application
where
the
'A”
channel
is
used
for
the
main
house
mix
and
the
“B”
channel
is
used
for
the
monitor
mix
feed
when
two
different
amounts
of
processing
are
needed
in
each
mix.
Figure
1A
shows
a
powered
mixer
where
the
BBE
422
is
inserted
between
the
program
out
and
the
graphic
equalizer
in.
Home
Studios
The
BBE
422
gives
a
pro-edge
to
otherwise
dull
recordings
on
narrow-track
width
home
recorders.
Snare
drums
and
guitars
take
on
a
brighter
tonal
quality
without
equalization.
Tape
tracks
recorded
without
BBE
™
can
be
processed
after
the
fact
by
placing
the
BBE
422
between
the
tape
track
output
and
the
mixer
channel
input.
The
BBE
422
saves
poorly
recorded
low-level
instruments
and
brightens
them
without
bringing
up
the
tape
hiss
as
equalizers
do.
The
program
transients
are
audibly
improved
on
just
about
any
sound
source,
because
the
BBE
422
reduces
the
mid-range
“smear"
and
the
associated
masking
effects.
Figures
2
and
2A
show
two
applications
of
the
BBE
422
in
a
home
studio.
Figure
2
shows
that
when
recording,
the
BBE
422
is
inserted
between
“buss
out"
and
“tape
track
in".
By
monitoring
the
tape
track,
the
amount
of
processing
can
be
adjusted
to
suit
your
needs.
Figure
2A
shows
that
when
in
playback,
the
BBE
422
process
can
be
applied
to
a
previously
recorded
tape
track
by
inserting
the
BBE
422
between
the
tape
track
output
and
the
mixer
line
input.
This
is
a
mixdown
set
up
and
can
help
restore
lost
clarity.
Cassette
Copies
Since
the
BBE
422
is
a
single-ended
playback
process
without
encoding
or
decoding,
the
stereo
BBE
422
is
inserted
between
the
master
two-track
and
the
cassette
recorder
for
punchier
and
crisper
cassette
copies.
If
you
are
very
careful
of
the
amount
of
processing
you
are
using
and
know
the
material,
you
should
never
have
any
trouble
with
“thin”
sounding
copies.
Figure
3
shows
the
BBE
422
in
the
cassette
copy
mode.
Industrial
The
BBE
422
greatly
improves
intelligibly
in
speech
or
music
by
improving
the
attack
of
the
consonants
that
the
human
ear
needs
in
order
to
recognize
the
difference
between
like
sounding
words
and
syllables.
This
makes
the
BBE
422
a
natural
for
public
address,
intercom
or
wide
area
dispersion
of
pre-recorded
music
or
voice
announcements
over
an
existing
old
and
dull
loudspeaker
system.
Figure
4
shows
the
BBE
422
inserted
between
the
telephone
matching
adapter
and
the
auxiliary
input
to
the
public
address
intercom
amplifier.
Plugging
a
microphone
directly
into
the
BBE
422
will
not
work.
If
the
existing
PA.
amplifier
has
no
provision
for
auxiliary
input,
then
the
BBE
401
unit
should
be
used.
The
BBE
401
accepts
a
microphone
directly
and
then
interfaces
with
an
existing
P.A.
amplifier
without
costly
on-site
modifications.
The
Controls
Operation
of
the
BBE
422
is
quite
simple
due
to
the
sophisticated
circuitry
within
the
unit.
Below
are
the
names
and
purposes
of
each
control
on
the
BBE
422.
Lo
Contour
Control
Definition
Control
Hi
Contour
LED
stack
Function
Switch
Power
Switch
Rear
Panel
AC
Power
Cord
Fuse
Remote
Jack
Hl-Z
Unbalanced
W'
or
RCA
Output
Hl-Z
Unbalanced
V«"
or
RCA
Input
Each
channel
has
a
lo
contour
control
that
regulates
the
amount
of
phase
compensated
bass
equalization.
This
adjustment
ranges
from
-lOdBu
(fully
counterclockwise)
to
+fOdBu
(fully
clockwise)
at
50Hz
relative
to
the
input.
The
middle
position
is
flat
or
unity
gain.
Each
channel
has
a
definition
control
that
regulates
the
amount
of
amplitude
compensation
as
indicated
by
the
hi
contour
LED
stack.
The
minimum
(fully
counterclockwise)
position
yields
a
flat
frequency
response
with
phase
compensation
only.
Turning
clockwise
increases
the
amplitude
of
the
high
frequency
band
relative
to
the
mid
band
amplitude
providing
an
improved
spectral
balance
between
the
high
and
mid
bands.
Each
channel
is
equipped
with
a
set
of
LED
indicators
that
instantly
show
the
relative
amount
of
high
band
compensation
compared
to
the
mid
band.
1)
RED
LED
(marked
“
-
”):
Compression
mode.
The
amplitude
of
the
high
band
is
too
high
compared
to
the
mid
band
and
compression
is
being
applied
to
compensate.
2)
AMBER
LED
(marked
“O”):
Flat
mode.
No
amplitude
compensation
is
needed.
The
program
spectral
content
is
correct.
3)
GREEN
LED
(marked
“
+"):
Expansion
mode.
The
amplitude
of
the
high
band
is
too
low
compared
to
the
mid
band
and
the
amplitude
of
the
high
band
is
being
expanded
to
compensate.
4)
CLIP
LED:
This
LED
indicates
that
the
output
of
the
BBE
422
has
reached
the
maximum
input
level
of
+
16dBu.
Each
channel
is
equipped
with
a
function
push-button
switch
which
allows
for
a
quick
com¬
parison
of
processed
with
unprocessed
sound.
When
the
switch
is
depressed,
the
green
“In"
LED
lights.
When
the
switch
is
out,
the
amber
“Out”
LED
lights.
This
switch
controls
primary
power
to
the
BBE
422.
Plugs
into
AC
power
receptacle.
Turn
cap
on
fuse
holder
counterclockwise
to
remove
fuse.
(Note:
replace
with
250Vac,
V
2
A
type
fuse.)
An
additional
W'
jack
is
provided
for
remote
actuation
of
the
function
switch.
Any
push-on/push-
off
single
pole
switch
will
work
as
a
remote.
The
front
panel
function
switch
must
be
in
the
process
position
in
order
for
this
jack
to
operate.
Each
channel
is
equipped
with
a
W'
phone
jack
or
an
RCA
jack
that
is
a
high
impedance
unbalanced
line
level
output
and
can
deliver
up
to
+
16dBu
into
10k
ohms.
Each
channel
is
equipped
with
a
'A"
phone
jack
or
RCA
jack
that
accepts
a
high
impedance
unbalanced
line
level
input
with
an
average
level
of
OdBu.
(Note:
+
16dBu
is
the
maximum
input
before
clipping.)
Set-Up
The
BBE
422
is
connected
into
the
audio
chain
in
series
with
the
signal
path
—
the
same
way
a
graphic
equalizer
or
limiter
is
connected.
The
output
of
the
mixer,
pre-amp
or
tape
recorder
feeds
the
input
of
the
BBE
422.
Remember,
outputs
connect
to
inputs
and
as
long
as
the
signal
source
level
is
within
the
nominal
range
as
mentioned
in
the
previous
section,
the
BBE
422
will
function
perfectly.
Setting-up
and
using
the
BBE
422
as
an
echo
send
device
like
a
digital
reverb
is
not
recommended.
The
processing
effect
is
not
fully
realized
when
the
output
of
the
BBE
422
is
summed
with
the
original
source
audio.
The
BBE
422
also
has
an
additional
quarter
inch
jack
for
remote
actuation
of
the
process
in/out
switch.
Any
single-pole,
single-throw
switch,
such
as
a
footswitch,
will
work.
Calibration
Procedure
for
the
BBE
™
Model
422
Equipment
Required:
Audio
Signal
Generator
(sine
wave)
Digital
Voltmeter
(DVM)
This
procedure
details
the
calibration
of
channel
A.
Comments
[in
brackets]
pertain
to
channel
B.
All
tests
are
done
with
a
signal
level
of
OdBu
(,775Vrms)
except
for
the
clip
indicator
check.
The
signal
will
be
input
into
the
'A"
connector
marked
INPUT.
The
DVM
shall
monitor
the
'A"
connector
of
each
corresponding
channel
marked
OUTPUT.
(Note:
The
L
&
R
after
the
part
reference
number
designates
Left
(A)
and
Right
(B).)
Initial
Settings:
1.
Definition
controls
(VR5L
&
VR5R)
to
minimum.
2.
All
other
potentiometers
to
their
middle
positions.
3.
Power
switch
on
and
FUNCTION
switch
IN
(process
on).
Procedure:
Power
Supply
Test:
1.
With
DVM
set
to
DC
volts,
measure
pin-4
of
U2.
You
should
read
+
12Vdc
(±0.5Vdc).
2.
With
DVM
set
to
DC
volts,
measure
pin-11
of
U2.
You
should
read
-
12Vdc
(±0.5Vdc).
Offset
Adjustment:
1.
With
no
signal
present
at
the
input
(open),
measure
TP1L
[TP1R]
with
the
DVM
set
to
DC
volts.
2.
Adjust
VR6L
[VR6R]
until
DVM
reads
O.OOVdc.
Unity
Adjustment:
1.
Input
a
500Hz
signal
(@
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.
Adjust
VR3L
[VR3R]
until
the
DVM
reads
OdBu.
4.
Set
generator
to
5000Hz
(OdBu).
5.
Adjust
VR4L
[VR4R]
until
the
DVM
reads
OdBu.
6.
Repeat
steps
1
thru
5
until
readings
are
correct
since
some
interaction
exists.
Lo-Contour
Test:
1.
Input
a
50Hz
signal
(@
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
“
+
”).
The
DVM
should
read
approximately
+
lOdBu.
4.
Turn
the
LO-CONTOUR
control
completely
counterclockwise
(marked
“
-
”).
The
DVM
should
read
approximately
-
lOdBu.
5.
Turn
the
control
to
the
middle
position
(marked
“0”).
The
DVM
should
read
approximately
OdBu
or
flat
response.
Detector
Balance:
(Note:
The
DEFINITION
control
must
be
completely
minimum.)
1.
Input
a
500Hz
signal
(@
OdBu)
into
the
connector
marked
CHANNEL
A
[B]
INPUT.
2.
Measure
TP1L
[TP1R]
with
DVM
set
to
DC
volts
and
adjust
VR1L
[VR1R]
until
meter
reads
-1
.OOVdc.
Bypass
Test:
1.
Switch
the
FUNCTION
switch
OUT
(bypass
mode).
2.
Input
a
500Hz
signal
(@
OdBu)
into
the
connector
marked
CHANNEL
A
[B]
INPUT.
3.
Measure
the
connector
marked
OUTPUT
CHANNEL
A
[B]
with
the
DVM
set
to
AC
volts.
4.
The
DVM
should
read
OdBu
(±0.5dBu).
5.
Return
the
FUNCTION
switch
to
the
IN
position
(process
mode).
Remote
Test*
1.
Switch
the
FUNCTION
switch
to
the
IN
position.
2.
Plug
into
the
connector
marked
REMOTE
a
'A"
shorting
jack.
3.
Ensure
the
FUNCTION
changes
to
OUT
or
bypass.
LED
Test:
1.
Input
a
500Hz
signal
(@
OdBu)
into
the
connector
marked
CHANNEL
A
[B]
INPUT.
2.
With
the
DEFINITION
control
to
minimum,
the
amber
HIGH
CONTOUR
LED
(marked
“0")
should
be
lit.
3.
Turn
the
DEFINITION
control
to
maximum,
the
green
HIGH
CONTOUR
LED
(marked
“
+")
should
be
lit.
4.
Set
generator
to
5000Hz.
5.
Turn
the
DEFINITION
control
to
maximum
the
red
HIGH
CONTOUR
LED
(marked
“
-
”)
should
be
lit.
6.
With
the
FUNCTION
switched
to
the
IN
position
the
corresponding
green
LED
should
be
lit.
7.
With
the
FUNCTION
switched
to
the
OUT
position,
the
corresponding
amber
LED
should
be
lit.
Clip
Indicator
Test:
1.
Input
a
500Hz
signal
with
an
amplitude
of
+16dBu
(4.887Vrms)
into
the
connector
marked
INPUT
CHANNEL
A
[Bj.
Ensure
the
corresponding
CLIP
LED
is
fully
lit
for
each
channel.
RCA
Connector
Test:
1.
Ensure
the
RCA
connectors
function
the
same
as
the
W'
phone
jacks
since
they
are
connected
in
parallel.
END
TEST
Specifications
BBE
422
Frequency
Response
Bypass
DC
to
20kHz
Process
Mode
program
controlled
Power
Requirements
120
VAC
(nominal)
50/60Hz
10
Watts
(220VAC
available)
A/C
Line
fused
protected
Noise
in
Process
Mode
-
90dBu
below
rated
max
output
of
+
14dBu
Total
Harmonic
Distortion
in
Process
Mode
less
than
0.1%
@
1kHz
@
-
lOdBu
Level
Input
Characteristics
Input
Impedance
50K
Ohms
Nominal
Input
Level
-
lOdBu
Maximum
Input
Level
+14dBu
Output
Characteristics
Minimum
Load
Impedance
for
full
output
level
1K
Ohm
Nomimal
Output
Level
-
lOdBu
Maximum
Output
Level
+
14dBu
Terminations/Connectors
Rear
Panel
RCA
Jacks
and
'A"
Phone
Jacks
Dimensions
1
%"
H
x
17"
W
x
5
3
/4"
D
Standard
1U
single
rack
Weight
4'/2
lbs.
(2.5Kgs)
NOTE:
OdBu
=
0.775
Vrms
Service
We
recommend
that
If
at
all
possible
a
BBE
422
which
requires
repair
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
to
obtain
a
“Return
Authorization”
and
include
with
the
unit
a
copy
of
the
bill
of
sale
so
that
this
process
can
be
expedited.
As
the
repair
turnaround
time
is
minimal,
we
request
that
the
unit
be
sent
to
BBE
Sound,
Inc.
We
also
need
to
add
reliability
data
to
our
files
so
that
future
revisions
may
be
undertaken
if
necessary
to
improve
the
product.
Warranty
The
BBE
422
Processor
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
pre-paid
to
BBE
Sound,
Inc.,
5500
Bolsa
Ave..
Suite
245.
Huntington
Beach.
CA
92649.
We
will
pay
return
UPS
shipping
charges
within
the
U.S.A.
All
charges
related
to
non-U.S.
shipping,
including
customs
clearance,
will
be
billed.
This
warranty
will
be
considered
null
and
void
by
BBE
Sound.
Inc.
if
any
of
the
following
is
found:
1.
Equipment
has
been
physically
damaged.
2.
Equipment
shows
sign
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.
BBE
Sound.
Inc.
is
NOT
LIABLE
FOR
CONSEQUENTIAL
DAMAGES.
Should
the
processor
fail
to
operate
for
any
reason,
our
sole
obligation
is
to
repair
the
unit
as
described
above.
Maintenance
Maintenance
of
the
BBE
422
is
limited
to
proper
cleaning
of
the
unit
with
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
this
unit
there
is
little
or
no
drift
of
the
components
in
the
BBE
422
which
would
cause
a
change
in
calibration.
A
very
conservative
design
philosophy
has
resulted
in
a
piece
of
equipment
which
runs
very
cool
and
should
give
years
of
trouble-free
service.
Calibration
Procedure
for
the
BBE
™
Model
422
Equipment
Required:
Audio
Signal
Generator
(sine
wave)
Digital
Voltmeter
(DVM)
This
procedure
details
the
calibration
of
channel
A.
Comments
[in
brackets]
pertain
to
channel
B.
All
tests
are
done
with
a
signal
level
of
OdBu
(,775Vrms)
except
for
the
clip
indicator
check.
The
signal
will
be
input
into
the
!4"
connector
marked
INPUT
The
DVM
shall
monitor
the
'A"
connector
of
each
corresponding
channel
marked
OUTPUT.
(Note:
The
L
&
R
after
the
part
reference
number
designates
Left
(A)
and
Right
(B).)
Initial
Settings:
1.
Definition
controls
(VR5L
&
VR5R)
to
minimum.
2.
All
other
potentiometers
to
their
middle
positions.
3.
Power
switch
on
and
FUNCTION
switch
IN
(process
on).
Procedure:
Power
Supply
Test:
1.
With
DVM
set
to
DC
volts,
measure
pin-4
of
U2.
You
should
read
+
12Vdc
(±0.5Vdc).
2.
With
DVM
set
to
DC
volts,
measure
pin-11
of
U2.
You
should
read
-12Vdc
(±
0.5Vdc).
Offset
Adjustment:
1.
With
no
signal
present
at
the
input
(open),
measure
TP1L
[TP1R]
with
the
DVM
set
to
DC
volts.
2.
Adjust
VR6L
[VR6R]
until
DVM
reads
O.OOVdc.
Unity
Adjustment:
1.
Input
a
500Hz
signal
(@
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.
Adjust
VR3L
[VR3R]
until
the
DVM
reads
OdBu.
4.
Set
generator
to
5000Hz
(OdBu).
5.
Adjust
VR4L
[VR4R]
until
the
DVM
reads
OdBu.
6.
Repeat
steps
1
thru
5
until
readings
are
correct
since
some
interaction
exists.
Lo-Contour
Test:
1.
Input
a
50Hz
signal
(@
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
“
+
The
DVM
should
read
approximately
+
lOdBu.
4.
Turn
the
LO-CONTOUR
control
completely
counterclockwise
(marked
“
-
’’).
The
DVM
should
read
approximately
-10dBu.
5.
Turn
the
control
to
the
middle
position
(marked
“0”).
The
DVM
should
read
approximately
OdBu
or
flat
response.
Detector
Balance:
(Note:
The
DEFINITION
control
must
be
completely
minimum.)
1.
Input
a
500Hz
signal
(@
OdBu)
into
the
connector
marked
CHANNEL
A
[B]
INPUT.
2.
Measure
TP1L
[TP1R]
with
DVM
set
to
DC
volts
and
adjust
VR1L
[VR1R]
until
meter
reads
-1
.OOVdc.
Bypass
Test:
1.
Switch
the
FUNCTION
switch
OUT
(bypass
mode).
2.
Input
a
500Hz
signal
(@
OdBu)
into
the
connector
marked
CHANNEL
A
[B]
INPUT.
3.
Measure
the
connector
marked
OUTPUT
CHANNEL
A
[B]
with
the
DVM
set
to
AC
volts.
4.
The
DVM
should
read
OdBu
(±0.5dBu).
5.
Return
the
FUNCTION
switch
to
the
IN
position
(process
mode).
Remote
Test:
1.
Switch
the
FUNCTION
switch
to
the
IN
position.
2.
Plug
into
the
connector
marked
REMOTE
a
'A"
shorting
jack.
3.
Ensure
the
FUNCTION
changes
to
OUT
or
bypass.
LED
Test:
1.
Input
a
500Hz
signal
(@
OdBu)
into
the
connector
marked
CHANNEL
A
[B]
INPUT.
2.
With
the
DEFINITION
control
to
minimum,
the
amber
HIGH
CONTOUR
LED
(marked
“0")
should
be
lit.
3.
Turn
the
DEFINITION
control
to
maximum,
the
green
HIGH
CONTOUR
LED
(marked
“
+
”)
should
be
lit.
4.
Set
generator
to
5000Hz.
5.
Turn
the
DEFINITION
control
to
maximum
the
red
HIGH
CONTOUR
LED
(marked
“
-
”)
should
be
lit.
6.
With
the
FUNCTION
switched
to
the
IN
position
the
corresponding
green
LED
should
be
lit.
7.
With
the
FUNCTION
switched
to
the
OUT
position,
the
corresponding
amber
LED
should
be
lit.
Clip
Indicator
Test:
1.
Input
a
500Hz
signal
with
an
amplitude
of
+
16dBu
(4.887Vrms)
into
the
connector
marked
INPUT
CHANNEL
A
[Bj.
Ensure
the
corresponding
CLIP
LED
is
fully
lit
for
each
channel.
RCA
Connector
Test:
1.
Ensure
the
RCA
connectors
function
the
same
as
the
'A"
phone
jacks
since
they
are
connected
in
parallel.
END
TEST
FIGURE
1
LIVE
SOUND
SYSTEM
n
L
1
1
1
□
□
□
□
D
□
D
Q
□
□
□
□
□
□
SYNTHESIZER
DIRECT
BOX
©
©
©
©
©
©
©
©
(A)
©
©
¥
©
¥]
©
©
©
©
©
©
©
©
©
©
j
ej
j
9|
J
iL
MIXING
CONSOLE
MAIN
OUT
(HOUSE)
OUT
IN
OUT
b_
IN
_2j
po
6°
c
JO
MONITOR
OUT
422
POWER
AMPLIFIER
©
©
POWER
AMPLIFIER
HOUSE
MONITOR
FIGURE
1A
POWERED
MIXER
SYSTEM
FIGURE
2
RECORDING
HOME
STUDIO
APPLICATION
FIGURE
2A
PLAYBACK
HOME
STUDIO
APPLICATION
TAPE
OUT
IN
OUT
IN
FIGURE
3
CASSETTE
COPIES
FIGURE
4
INDUSTRIAL
PAGING
SYSTEM
INDUSTRIAL
AMPLIFIER
TELEPHONE
MATCHING
ADAPTOR
Rev.
5/89
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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1
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