250 Ti (serv.man2) - JBL Audio User Guide / Operation Manual. Page 3

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Speaker wire and interconnecting cables are an important
component in an audio system. The 250Ti Jubilee system
is internally wired with specially designed cable manufac-
tured for JBL by Monster Cable

®

. The same care that was

taken in selecting internal system wiring should be taken
in selecting and applying the cables that will connect the
various system components. Your 250Ti Jubilee dealer
has the experience and knowledge to recommend suitable
interconnects and speaker wire to best complement your
system.

The following gauge wires (minimum requirements) are
recommended:

1 mm

2 

(18 AWG)

Up to 5 meters (15 feet)

1.5 mm

2 

(16 AWG)

Up to 10 meters (30 feet)

2 mm

2

(14 AWG)

Up to 25 meters (75 feet)

The length of the wire will depend on the location of the
loudspeakers and amplifier. Since you should listen care-
fully to your loudspeakers 

before determining their final

position, you may want to arrange a temporary wiring
layout that allows you to move the loudspeakers and
experiment with their placement. After you have deter-
mined the best location for the system, permanent con-
nections may then be made using the shortest cable runs
possible. Use the same length wires for both speakers.

In some systems, the amplifier may be located near

the loudspeaker system and connected using a short
length of wire. Although such a hookup requires a 
relatively long cable between the preamplifier and main
amplifier, the benefit of the short amplifier-to-loudspeaker
connection often outweighs any drawbacks.

WARNING: Be sure your amplifier is turned off before 
connecting or disconnecting the loudspeakers. Making con-
nections while the amplifier is operating could seriously
damage the loudspeaker system and void the warranty. The
amplifier must also be turned off before connecting or dis-
connecting cables at the amplifier or preamplifier inputs.

Before you begin. Examine your speaker wire carefully.

One conductor is solid, and the other is differentiated
by a ridge, printed marking or color stripe. Assign one
conductor positive (+) and the other negative (–) polarity,
and always connect the designated conductors to their
respective amplifier and loudspeaker terminals, positive-
to-positive, and negative-to-negative. This will ensure that
the loudspeakers will work together (in phase) rather than
in opposition. (Connecting the loudspeakers out of phase
will not cause damage but will result in reduced low-
frequency output and lack of stereo effect.)

JBL2516 250TIjubileemanual  7/20/98 11:19 AM  Page 3