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

tik center (serv.man2) user guide / operation manual
TiK CENTER (serv.man2)
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User Guide / Operation Manual

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Excellence is an exclusive quality. It's so easy to recognize, yet so
difficult to attain.
JBL craftsmen have been involved in the art of sound for more than
a generation – signal and source, wood and fabric, transducers and
acoustics – all of it.
Today these craftsmen continue to perform to the most rigid
standards any craftsmen can submit to: those imposed upon
JBL loudspeakers are carefully engineered instruments, pains-
takingly crafted and assembled to watchmaker standards. JBL
enclosures express the excitement of creative design; they are ele-
gant, rigid and flawlessly finished. JBL transducers and electronics
offer what has been characterized by devoted music listeners as
“the incomparable JBL sound”.
JBL Ti Series loudspeakers are the ultimate expression of over 50
years experience creating loudspeakers that are the first choice of
professionals worldwide. This experience, teamed with an extensive
development program of comparisons, experiments, testing and
listening, has resulted in loudspeaker systems displaying truly
exceptional performance.
By following the few simple suggestions contained in this booklet,
you can look forward to superb high fidelity reproduction that will
retain its clarity and realism year after year.
The packing material of your Ti speakers has been designed to
protect the loudspeakers from any damage due to rough handling
during shipment. We strongly suggest that you keep the packing
material for future purposes, in case you are moving or your 
loudspeakers should require service.
The listening room and the location of the loudspeakers within the
room affects bass level and bass response, imaging, clarity and
overall quality of sound. No other single factor has the same level of
effect on the final sound quality. The acoustics of the listening room
are determined by the dimensions of the room, its construction and
the furnishings it contains. Rooms that have different dimensions 
for ceiling height, length and width will give a more even, balanced
sound than rooms where the dimensions are equal to each other,
especially at low frequencies. This is important, especially at low
frequencies, as the room dimensions determine the pattern of
standing waves within the room.
The construction of the room, wooden floors, wood wall panelling,
plasterboard or brick will affect the reproduction of low frequencies,
with “soft” walls, floors and ceilings resulting in a loss of bass energy
in the room, because the low frequencies are “leaked” out. On the
other hand solid walls, floors and ceilings like brick and concrete
may cause problems by increasing the level of reverberation time at
low frequencies giving a boomy, fat sound.
At middle and high frequencies furniture, carpets and curtains all
have a damping effect that might be desirable, depending on the
actual acoustics and your listening preferences.
Ideally, there should be a reasonable balance between the
absorptive material and sound reflecting surfaces. If there are two
large reflecting surfaces facing each other, the “bounce” between
them will make sounds run together and the music will lack
definition. Large flat surfaces should be broken up with bookshelves,
drapes, screens or tapestries.
Consult your JBL Ti Series dealer for further information regarding
the use of products or materials designed to control certain acoustic
problems caused by room size, shape or construction. In many
cases, significant improvement in performance can be achieved by
careful attention to room acoustics.
Your JBL Ti speakers are able to give a very satisfying sound in a
great variety of listening rooms when set up in an even sided 
triangle with respect to the listener. However, a careful setup 
procedure will always be rewarding, and for best results we
recommend placement well away from the boundaries of the room
with preferably minimum 0.75 m (30 in) distance to the wall behind
the speakers, and 0.75-1 m (30-40 in) distance to the side walls.
A good guideline is to start by concentrating on the tonal balance of
the sound, aiming for the most neutral reproduction. When the
desired tonal character is achieved, efforts should be directed
towards the recreation of the sound stage – the imaging.
The tonal balance is roughly determined by the distances to the
walls of the room in combination witht the specific acoustic proper-
ties of the room. Placement close to walls gives a reinforcement of
lower frequencies compared to placement well away from room
boundaries. Movements of the loudspeaker to give good tonal
balance requires relatively large movements, typically 0.20-0.30 m
(8-12 in).
When a satisfying balance is found, a proper sound stage and stereo
localization is developed by smaller movements of the loudspeaker
in combination with angling towards the listening position.
The Ti speakers are supplied in mirror imaged pairs that will help
build an impressive sound stage due to their asymmetrical shape.
The Ti speakers do not come as specific left or right enclosures. We
strongly recommend experimentation in order to find the most
satisfying overall sound. Attention to every detail of the setup will be
beneficial in terms of improved sound quality.
The JBL Ti 2K should be placed on a rigid and open, preferably
heavy stand of approximately 40-60 cm (16-24 in) height. A
dedicated stand for the Ti 2K is available from your JBL Ti Series
dealer. The JBL Ti 6K and Ti 10K have provisions for the mounting of
spikes at the bottom of the speakers. The spikes can be mounted in
threaded inserts located beneath the rubber feet at the bottom of
the speakers. The benefit of spikes will very often be a more
accurate, tight and dynamic bass reproduction, and a more stable
and precise stereo image. The reason behind this is that the spikes
provide a tighter mechanical coupling between the loudspeaker
enclosure and the floor, whether hardwood, concrete or brick. 
Your authorized JBL dealer will be happy to help you obtain the best
possible performance from your JBL speakers.
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.
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
(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
(16 AWG)
up to 10 meter (30 ft) and 2 mm
(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
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
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.
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
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
same length. If the cable to one speaker system is longer than the
one to the other speaker due to the distance from the power
amplifier, make sure not to wind the excess cable up in the form of a
coil. Instead, try to arrange it in figures of eight, as this will minimize
the inductance of the cable run and thus minimize cable losses at
high frequencies.
CAUTION: Never connect two amplifiers to the same loudspeaker
without first removing the strapping bars. Operating two amplifier
channels with the bars in place can seriously damage the amplifiers
and void the warranty.
Another option is to power each separate drive unit (and its
associated network section) from its own power amplifier.
Up to four identical stereo power amplifiers may be used, although
specialized amplifiers for low, mid and high frequencies can offer
clear advantages.
Your JBL Ti-dealer can recommend amplifiers that best suit your
needs. In any case, it is important to make sure that the gain of the
individual amplifiers used is identical, or that input level controls are
provided to maintain proper balance between the various sections of
the speaker.
Beware that some power amplifiers invert the polarity of the signal.
Amplifier polarity marking is not always a true indicator. The polarity
of the signal should be the same for all sections of the speaker.
If the polarity is reversed to one section of the loudspeaker, a
discontinuity in the freefield response will be apparent in the cross-
over region. This can change the sound significantly, but will
otherwise do no damage to either the speaker or the amplifier.
The Ti speakers are capable of handling peak power far exceeding
the continuous rating specified for the individual speakers.
The continuous ratings are based on an eight hour test using
broadband noise shaped to simulate the power distribution of
music. The peak rating of approximately 4 times the continuous
rating indicates the system's ability to handle transient peaks well
above the average power levels.
Amplifier power ratings are an INDICATION of how loud the system
will play without distortion. Amplifier power is generally measured
with steady state test signals and perhaps, in addition, dynamic
measurements into resistive loads. Unfortunately none of these are
firm indications of how loud the system will sound in a given
listening room.
For these reasons, an amplifier should only be chosen after careful
listening. If it is possible to achieve the desired volume level without
distortion, then the amplifier has sufficient power regardless of the
More important than the power rating is the quality of sound the
amplifier is capable of. Unfortunately, amplifier specifications are 
not a reliable indicator of sound quality. Your JBL Ti Series dealer
can make recommendations and arrange auditions to aid selection
of suitable amplification.
If the system is set up with separate power amplifiers for high and
low frequency sections, the amplifier for the high frequency section
can be of less power than the amplifier driving the low frequency
section because of the power distribution in recorded music. As an
example: if a 100 watt low frequency amplifier is used, a 50 watt
high frequency amplifier will “run out of power” at approximately the
same level when playing music.
Fuses or circuit breakers of any kind should not be used between
the amplifier and loudspeakers. All such devices will seriously
degrade the sound quality and do not ensure protection from
loudspeaker damage. The key to safe operation is adequate
amplifier power to avoid distortion at the highest sound levels
JBL Ti Series loudspeaker systems are finished in select wood
veneers. The veneer is protected with a coating that will retain its
finish for many years to come. Occasional cleaning with a clean, soft
cloth will maintain the original beauty of the finish.
The beautiful deep gloss finish is the result of a meticulous multi-
step painting and polishing procedure. The surface should be
treated very carefully to avoid scratching the finish. Only lint-free
cotton cloths should be used for dusting. To remove fingerprints and
smudges, an ammonia-free window cleaner may be used. Apply a
small amount to a lint-free cotton cloth and gently clean the surface.
Never use any abrasive cleaners or strong chemical to clean the
enclosure. In case of deep scratches or damage, please consult a
qualified furniture repair shop.
The grille is held in place by a pin located at each corner. To 
remove the grille, grasp two corners and gently pull the grille away
from the enclosure. To replace the grille, position the mounting pins
on the cups and gently press until the grille meets the enclosure.
Although the grille has been engineered to minimize acoustical
interference, high frequency response and stereo imaging will be
improved by removing the grille.
Any dust on the grille should be removed using a cleaning brush or
a vacuum cleaner.
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