TiK CENTER (serv.man2) - JBL Audio User Guide / Operation Manual. Page 3

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NOTE: New loudspeakers require a certain amount of “exercise”
before they perform their best. A steady level of performance is
achieved after 8-12 hours of operation, depending on the nature of
the music and the level. Should you want to speed up this process
you can use inter-station FM noise as a signal during periods, where
you would normally not be listening to the speaker. Alternatively a
CD player on "Repeat" would be an appropriate signal source.
CONNECTIONS
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 loud-
speaker system and void the warranty. The amplifier must also be
turned off before connecting or disconnecting cables at the 
amplifier or pre-amplifier inputs.
1 mm
2
(18 AWG) insulated wire is the minimum size recommended
for loudspeaker connections up to 5 meters (16 ft). Beyond this
distance, heavier gauge wire is recommended: 1.5 mm
2
(16 AWG)
up to 10 meter (30 ft) and 2 mm
2
(14 AWG) up to 20 meters (60 ft).
These recommendation are given as MINIMUM requirements, and
generally speaking, the speaker leads should be as short as
possible.
Speaker wire and interconnect cables are important components in
an audio system. With all other factors at an appropriate level of
quality the speaker cable and the interconnect cable can make
significant contributions to the perceived sound quality. Careful
selection of cable and interconnect can add or subtract marked
shadings in tonal character. Likewise, different cables can have
quite a dramatic impact on the dynamic contrasts experienced by
listeners.
The same care that was given to the internal system wiring in the 
JBL TI speakers should be afforded to the selection and application
of the cable that will connect the various components in your
system. Your JBL Ti Series dealer has the experience and knowledge
to recommend suitable interconnects and speaker wire to best
complement your system.
The length of the speaker wire will depend on the location of the
loudspeakers and the amplifier. Since the final positioning of the
loudspeaker will be determined by careful listening, you may want 
to arrange a temporary wiring layout that will allow the moving of the
loudspeaker to experiment with placement. When the best loud-
speaker position is determined, permanent connections may be
made using the shortest cable runs possible. Both left and right
speaker wires should be the same length. In some systems, the
amplifier may be located near the loudspeaker system and may be
connected using a short length of speaker wire. Although a relatively
long cable between the preamplifier and main amplifier is required
by such a hook-up, the benefit of a short amplifier-to-loudspeaker
connection will often outweigh the drawbacks.
Connections to the loudspeaker system are made at the terminals
located at the bottom of the enclosure. These terminals permit a
variety of connection methods.
The most straightforward connection is made by directly connecting
clean bare wire. This way the connection is made by stripping 
8-10 mm of insulation off the loudspeaker wire and passing the bare
wire through the hole in the binding post. If the wire is too thick to
pass through the hole in the terminal in one single bundle, separate
the copper wire into three equal bundles, then pass the center bundle
through the hole in the terminal. Wrap the remaining bundles around
the binding post and twist the center stands. The knob can now be
tightened securely, and any excess wire that is not in contact with the
binding post surfaces should be trimmed to avoid short circuits.
A very convenient way of connection is the use of 4 mm banana-
type connectors, which are then, in turn, connected to the binding
posts. Bear in mind, however, that the number of contact points
should be kept to a minimum, and at the same time each contact
should be as tight as possible.
For the same reason, we recommend the use of the highest quality
spade connectors, expertly connected to the selected cables. 
Spade lugs will together with the custom made binding posts 
made for the JBL TI speakers, make the best possible connection
between the speaker wire and the loudspeaker system, minimizing
any contact resistance that might degrade the sound ever so slightly.
Any connection in an audio system should not be considered “good
forever”. All connections should be inspected and cleaned or
remade periodically. Frequency of maintenance depends on the
materials involved in the connection, atmospheric conditions and
other factors. Consult your dealer for specific recommendations.
It is essential that both loudspeakers in a stereo system have the
same polarity with respect to the input signal (are in “phase”). JBL
Ti speakers are designed to produce a positive pulse when a positive
signal is applied to the red input terminal.
If the driver cones of the two loudspeakers do not move in the same
direction for a given voltage at the input terminals, there will be a
lack of stereo definition and a loss of deep bass.
We recommend experimenting with the polarity of the speakers,
since recordings, program sources or power amplifiers can invert
the polarity of the signal. The “correct” connection is the one that
yields the best audible results. Be sure to reverse both left and right
connections to keep the systems in polarity.
MULTI-WIRING
JBL Ti loudspeakers may also be connected to the power amplifier
using several lengths of wire. The multi-wire connection method
offers a number of options and advantages.
Each section of the Ti-loudspeaker system’s internal frequency
dividing network is electrically separated and equipped with its own
pair of input terminals
This way each individual loudspeaker drive unit (and its associated
network) can be connected independently to the power amplifier.
The loudspeaker system is shipped from the factory with all the
network sections interconnected by strapping bars, so that the
loudspeaker can be hooked up to the amplifier by a single run of
cables.
Be removing the bars, connections can be made to the individual
network sections using two or more pair of wires (four or more
conductors) as shown in figure 1. The wires used may be of the
same type for both low, middle or high frequency sections. The
advantages are that wire effects (resistance, inductance, etc.) are
reduced, and intermodulation of low and high frequencies in the
cable is avoided. Specialized wires for low, middle and high
frequencies may yield excellent results in some systems.
In either case, the cable for the low frequencies should be as short
as possible, and the left and right cable for each section must be the
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