SCS 138 TRIO (serv.man3) - JBL Audio User Guide / Operation Manual. Page 6

Separate and strip the ends of
the speaker wire as shown.
Speakers and electronics ter-
minals have corresponding (+)
and (–) terminals. Most manu-
facturers of speakers and
electronics, including JBL, use
red to denote the (+) terminal
and black for the (–) terminal.
To use the spring-type termi-
nals, simply press the colored
terminal, insert the bare end of
the wire into the hole, and
release. The clip inside the ter-
minal grips the wire. Tug the
wire gently to make sure that it
has been inserted properly.

The (+) lead of the speaker
wire is usually indicated by a
stripe, ridges in the wire insu-
lation, or gold-colored strands
inside clear wire insulation. It
is important to connect both
speakers identically: (+) on the
speaker to (+) on the amplifier
and (–) on the speaker to (–) on
the amplifier. Wiring “out of
phase” results in thin sound,
weak bass and a poor stereo
image.
With the advent of multichan-
nel surround-sound systems,
connecting all of the speakers
in your system with the correct
polarity remains equally impor-
tant in order to preserve the
proper ambience and direc-
tionality of the program 
material.

+      –

+      –

+      –

+      –

+      –

+        –

+      –

+      –

+      –

+      –