CONNECTING
JBL
NETWORKS
NETWORK
IMPEDANCE
All
JBL
dividing
net-
works
are matched to the characteristic impedance
of
the
transducers
with
which
they are
used.
Model
N500
is a 16-ohm network and should be connected
to
the 16-ohm amplifier tap for most efficient power
transfer. All other JBL networks
will
operate
most
efficiently
when connected to the 8-ohm amplifier
tap, although the 4-ohm or the 16-ohm tap can be
used
without
danger
of
damage
to amplifier or
loud-
speakers.
WIRE
SIZES In factory-installed JBL
systems,
18-gage
stranded insulated
wire
is
used
for connec-
tion
of components. In home installations,
18-gage
stranded or
solid
wire
or ordinary commercial
lampcord
may be
used
for speaker-amplifier con-
nections up to 50 feet.
CONNECTING
TO
AMPLIFIER
Fasten
the
leads
from
your amplifier to the two push-type
terminal
posts
on the face of the
dividing
network.
The "B" or black post
connects
to the black, or
common,
lead. The "R" or red post
connects
to the
8 or 16 ohm amplifier tap. No soldering is required.
Simply
depress
the colored button, insert the
bare
end of the lead
wire,
and
release.
CONNECTING
TO SPEAKERS Most JBL net-
works
are mounted on an escutcheon plate
which
fits
into the standard mounting cutout on the
enclosure. Lead wires
from
the
speakers
are
brought out to the push-type terminal
posts
on
the panel through
eyelets
in the escutcheon plate.
Proper connections of
speakers
to the various JBL
networks are explained below.
Care
should be taken
to
follow
connecting instructions exactly to
ensure
that the system
will
operate
in
phase:
that is, so
that a signal
from
the amplifier
will
cause
both
diaphragms to move in the
same
direction at the
same
time.
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