Owner's Manual
Table Of Contents
It
is
important
to
understand
that
just
as
the
propagation
of
sound
outdoors
is
effected
by
its
surroundings
so
is
the
propagation
of
sound
indoors.
Some
of
these
environmental
factors
exist
in
both
cases,
such
as
reflective
surfaces
and
absorbant
materials,
but
there
are
a
few
unique
effects
that
may
need
to
be
considered.
The
factors
described
on
this
page
can
cause
the
behavior
of
an
outdoor
installa-
tion
to
deviate
from
the
Inverse
Square
Law
.
Remember
not
all
frequencies
of
the
propagated
sound
will
be
affected
uniformly.
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DESERT
•
Humidity-
Because
water
vapor
is
lighter
than
air,
humid
air
.
is
less
dense
than
dry
air
and,
therefore
absorbs
less
acoustical
energy
than
dry
air
particularly
at
frequencies
above
2kHz.
To
labour
the
point,
a
speaker
mounted
on
a
tree
in
a
jungle
will
project
high
frequency
sound
further
than
the
same
speaker
mounted
on
a
cactus
in
the
desert
(see
diags.
5 &
6).
Painting
the
Speakers-
The
polystyrene
speaker
enclosures
of
the
Control®
23,
Control®
25,
&
Control®
28
can
be
painted
to
match
almost
any
decor.
The
vinyl
skin
of
the
Control®
SB-2
subwoofer
can
also
be
painted.
•
Remove
the
grilles.
Mask
the
woofers,
tweeters,
&
ports
on
the
front,
and
the
wire
terminals
on
the
back,
being
careful
that
no
tape
comes
in
direct
contact
with
the
drivers.
•
Clean
the
enclosures
with
a
light
solvent
such
as
mineral
spirits
by
rubbing
the
components
with
a
lightly
dampened
cloth.
Do
not,
however,
use
abrasives
such
as
sandpaper
or
steel
wool
on
the
enclosures.
Nor
should
you
use
gasoline,
kerosene,
acetone,
MEK
,
paint
thinner,
harsh
detergents
or
other
chemicals.
Use
of
these
cleaners
may
result
in
perma-
nent
damage
to
the
enclosures.
•
After
cleaning,
apply
two
or
more
thin
coats
of
either
latex
or
oil-based
paints.
Latex
paints
will
adhere
better
if
an
oil-
based
primer
is
used
first.
Application
can
be
by
rolling,
brushing,
or
spraying.
•The
grilles
require
masking
of
the
logo
plug,
then
spray
painting.
If
the
grill
is
rolled
or
brush
painted,
the
mesh
may
become
clogged
with
paint
,
and
poor
sound
quality
may
result.
•
The
/nvisiBalfM
mount
may
also
be
painted,
but
because
it
is
metal,
latex
paints
will
not
adhere
as
well
as
other
finishes
.
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