Owner's Manual

REFERENCE
®
THANKYOU
for
choosing
an
Infinity®
Reference®
Series
1000s
or
1200s
subwoofer.
These
Reference
subwoofers
are
designed
to
suit
a
broad
range
of
car
audio
applications
and
can
be
used
in
a
wide
variety
of
enclosure
types
to
produce
extended,
powerful
bass
in
a
limited
amount
of
vehicle
space.
To
get
the
most
performance
from
your
new
subwoofer,
it
is
strongly
recommended
that
you
have
a
qualified
professional
install
your
1000s
or
1200s
subwoofer.
Although
this
manual
does
provide
general
instructions
about
installing
these
Reference
Series
subwoofers,
it
does
not
include
enclosure
construction
details
or
exact
installation
methods
for
any
particular
vehicle.
If
you
do
not
feel
that
you
have
the
necessary
experience,
do
not
attempt
the
installation
yourself,
but
instead
ask
your
authorized
Infinity
dealer
about
professional
installation
options.
Remember
to
keep
your
sales
receipt
in
a
safe
place,
along
with
this
manual,
so
that
both
are
available
for
future
reference.
BOX
CONTENTS
(1)
1000s
or
1200s
subwoofer
(1)
Owner's
manual
(1)
Technical
data
sheet
WARNING
Playing
loud
music
in
a
vehicle
can
hinder
your
ability
to
hear
traffic
and
permanently
damage
your
hearing,
The
maximum
volume
levels
achievable
by
Infinity
speakers
when
combined
with
high-power
amplification
may
exceed
safe
levels
for
extended
listening.
Using
low
volume
le
vels
is
recommended
when
driving.
Infinity
Systems
accepts
no
liability
for
hearing
loss,
bodily
injury,
or
property
damage
as
a
result
of
use
or
misuse
of
this
product.
REPRODUCING
BASS
IN
VEHICLES
Depending
on
the
size
of
your
vehicle's
interior
listening
space,
reproduced
bass
frequencies
below
80Hz
will
be
boosted
by
nearly
12dB
per
octave
as
frequency
decreases.
This
phenomenon,
known
as
the
vehicle's
transfer
function
(or
cabin
gain),
plays
an
important
role
in
shaping
the
subwoofer's
frequency
response
in
your
vehicle.
The
enclosed
technical
data
sheet
includes
frequency
response
graphs
that
show
both
the
subwoofer's
"in-car"
response
(which
factors
in
this
vehicle
transfer
function)
and
its
"out-of-car
"
response
(which
does
not).
SUBWOOFER
ENCLOSURE
TYPES
Reference
1000s
and
1200s
subwoofers
are
designed
to
perform
best
in
moderately
sized
sealed
enclosures,
vented
enclosures
and
prefabricated
band
-
pass
enclosures.
Infinite-baffle
mounting
is
possible,
but
the
subwoofer's
mechanical
power
handling
will
be
reduced
because
there
will
be
no
volume
of
air
to
stiffen
the
subwoofer's
suspension
and
prevent
overexcursion.
If
you
choose
infinite-baffle
mounting,
consider
the
RMS
and
peak
power-han-
dling
ratings
to
be
half
of
what
is
listed
in
the
specifications
in
this
manual
.
You
should
choose
an
enclosure
type
based
on
the
amount
of
cargo
space
you
can
devote
to
the
enclosure,
the
amount
of
power
you
will
use
to
drive
your
subwoofer(s),
and
your
listening
habits.
SEALED
ENCLOSURES
The
air
trapped
inside
a
sealed
enclosure
is
compressed
when
the
subwoofer
moves
rearward
and
is
rarefied
when
the
subwoofer
moves
forward.
In
both
cases,
the
air
inside
and
outside
the
box
will
seek
equilibrium
by
pushing
and
pulling
on
the
subwoofer
cone
.
The
result
is
a
stiffer
suspension
when
compared
to
the
subwoofer
operating
in
free
air.
This
means
that
the
subwoofer's
cone
will
be
harder
to
move
at
low
frequencies,
a
condition
which
protects
the
subwoofer
from
physical
overexcursion,
but
requires
more
power
than
other
designs
to
achieve
a
given
acoustic
output.
See
accompanying
data
sheet
for
specific
enclosure
dimension
requirements.
SEALED
-
ENCLOSURE
PERFORMANCE
ADVANTAGES
o
The
in-vehicle
performance
will
have
the
flattest
overall
frequency
response.
o
The
in-vehicle
response
will
have
the
widest
bandwidth.
(Usable
low-frequency
response
inside
the
vehicle
will
be
below
20Hz.)
o
An
optimum
sealed
enclosure
will
always
be
smaller
than
an
optimum
enclosure
of
another
type,
SEALED-ENCLOSURE
PERFORMANCE
TRADE-OFFS
o
An
optimum
sealed
enclosure
will
have
lower
overall
efficiency
than
an
optimum
enclosure
of
another
type.
o
A 1
OOOs
or
1200s
subwoofer
in
an
optimum
sealed
enclosure
will
require
more
amplifier
power
to
achieve
a
given
acoustic
output
than
in
an
optimum
enclosure
of
another
type,
EN
SEALED-ENCLOSURE
CONSTRUCTION
Sealed-enclosure
construction
is
straight-
forward
and
forgiving
of
errors
in
volume
calculation,
but
air
leaks
should
be
avoided.
Use
medium
-
density
fiberboard
(MD
F),
glue
and
screws
to
construct
the
enclosure,
and
seal
all
joints
with
silicone
caulk.
THE
INFINITY
RECOMMENDATION
1000s
and
1200s
subwoofers
in
sealed
enclosures
are
recommended
for
enthusiasts
who
prefer
accurate
music
reproduc-tion
and
flat
frequency
response,
for
those
who
have
a
smaller
space
to
devote
to
a
subwoofer
enclosure,
and
for
those
who
have
plenty
of
amplifier
power
devoted
to
driving
the
subwoofer.
The
sealed-enclosure
design
indicated
on
the
technical
data
sheet
accompanying
this
manual
represents
the
best
compromise
between
low-frequency
extension
and
flat
response.
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