IMPORTANT:
When connecting or disconnecting
loudspeakers
from
an amplifier, the amplifier must
be
turned
off.
Making
connections
while
the amplifier
is
operating
could seriously damage the loudspeaker
system
and
void
the
warranty.
Eighteen-gauge insulated
wire
(ordinary household
lampcord)
is
the
minimum
size recommended for
loudspeaker connections up to
50
feet. Beyond this
distance, heavier gauge insulated
wire
is
recommended;
16-gauge
from
50
to 100 feet and
14-gauge
from
100 to 200
feet. If lampcord
is
used, wires can
be
differentiated by
noting
that one of the insulating jackets
is
smooth,
while
the
other has
a
distinct ridge. By considering the ridged
jacket "red" and the smooth jacket "black,"
wiring
connections can
be
made
as
if using color-coded
wire.
Connections to the audio power source are made
using
the two pushbutton
terminal
posts located on the
back
of the loudspeaker system enclosure. The holes in
JBL
terminal
posts do not
allow
the connecting
wire
to
pass
all the way through, preventing the possibility of
a
short
to the other
terminal
post or to nearby electrical
conductors.
To
make
a
secure
connection, strip approximately
%
inch
of the
insulation
from
the end of the
wire,
push
down
the spring-loaded
terminal
post cap, insert the
bare
wire
into
the exposed opening of the
terminal
post
and
release. (Insertion of the
wire
into
the opening
will
be easier if the stripped
wire
is
first
tinned
with
a
soldering
tool
and solder.)
Locate the loudspeaker output terminals on the
back
of
the receiver or power amplifier. For
each
loudspeaker
system,
connect the
wire
from
the black
terminal
post to
the
amplifier output
terminal
labeled "common,"
"ground"
or (—), and the
wire
from
the red
terminal
post
to
the remaining 8-ohm speaker output?
Note
that many amplifiers have
a
chassis
grounding
terminal
which
is
usually isolated
from
the other
connectors. This should not
be
confused
with
the
"ground"
designation sometimes used to describe two
of
the terminals in
each
set of loudspeaker connections.
3.
Connecting both speakers as described
will
insure
proper
"in
phase" operation; i.e., their cones
will
respond to a
monophonic signal by moving simultaneously in the
same
direction,
and not opposite to
each
other. Inadvertent
out-of-
phase operation
(which
occurs when one set of speaker
wires
is reversed
with
respect to the other)
will
not harm the
system,
but may cause
some
acoustical "cancellation" which
will
have the audible effect of reducing low frequency
response.
4
CONNECTING
THE L36
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