Owner's Manual
TROUBLESHOOTING
Am
I
In
Phase?
If
your
inputs
are
out
of
phase
and
you
turn
the
balance
control
of
your
radio
all
the
way
to
one
side,
right
or
left,
the
bass
output
from
the
Bazooka®
will
increase.
When
you
bring
the
balance
control
back
to
the
center
position
the
bass
level
will
drop.
This
confirms
that
one
of
your
input
channels
is
wired
out
of
phase
with
the
other.
When
one
of
the
Amplified
Bazooka·s High-level
Input
channels
is
out
of
phase
electrically
with
the
other
High-level
Input
channel,
your
Bazooka
will
sound
as
if
it
has
little
or
no
output
and
any
output
that
is
produced
may
sound
distorted.
If
you
suspect
that
your
Bazooka
is
out
of
phase, use
the
AM
I
IN
PHASE
procedure
to
diagnose and correct
the
Bazookas·
output,
and
proper
bass
response
will
be
produced.
channels
is
wired
out
of
phase
with
the
other.
To
correct
this
situation,
simply
flip
the
phase
switch
on
the
amplified
Bazooka®.
When
the
input
signal
is
in
correct
electrical
phase,
the
level
of
bass
output
will
be
greatest
when
the
balance
control
of
the
radio
is
set
to
the
center
position.
Do
You
Have
A Phase
Problem?
If
the
bass response in
your
application
appears
to
be
lower
then
you
expected
or
sounds
muffled
and
or
distorted,
you
may
be
experiencing
Phase
Cancellation.
Phase
Cancellation
When
two
speakers in
the
same
frequency
range
produce
sound
waves
that
are
inverted
from
one
another
or
180°
out
of
phase,
the
sound
waves
will
cancel each
other
out
to
some
degree.
This
effect
will
be
heard
as
a
drop
in
the
output
level
and/or
a
muffled
or
muddy
quality
in
the
Bass
Response. The
source
of
this
Phase
Cancellation
can be
at
any
point
in
the
signal
path.
The
obvious
cause
of
this
problem
would
be a
speaker
connection
that
was reversed in
polarity,
but
that
is
not
always
the
case.
Sometimes
amplifier
channels
will
shift
phase 180°
for
no
good
reason,
or
a signal processor
could
have a
setting
for
phase
that
has
been
set
incorrectly
or
the
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