Wiring The System; Standard Connection; Final Adjustments - JBL LS40 Owner's Manual

WIRING THE SYSTEM

IMPORTANT: MAKE SURE ALL EQUIPMENT IS
TURNED OFF BEFORE MAKING ANY CONNECTIONS
For speaker connections, use a high-quality speaker wire with polarity coding.
The side of the wire with a ridge or other coding is usually considered positive
polarity (i.e., +).
NOTE: If desired, consult your local JBL dealer about speaker wire and
connection options.
Speaker Wire
Figure 4. This figure shows how to
connect bare wires to the terminals.
IMPORTANT: DO NOT REVERSE POLARITIES
(I.E., + TO – OR – TO +) WHEN MAKING
CONNECTIONS. DOING SO WILL CAUSE POOR
IMAGING AND DIMINISHED BASS RESPONSE.

STANDARD CONNECTION

Standard
Connection
Figure 5. Wiring diagram shows polarity connections for one channel
of a stereo or home theater system.
BI-WIRING
LS40, LS60, LS80
The outer connection panel and internal dividing network of the LS40, LS60
and LS80 are designed so that separate sets of speaker cables can be
attached to the low-frequency transducer and midrange/high-frequency
transducer portions of this dividing network. This is called bi-wiring. Bi-wiring
can provide several sonic advantages and considerably more flexibility in
power amplifier selection.
Figure 6.
The speakers have coded
terminals that accept a variety
of wire connectors. The most
common connection is shown
in Figure 4.
To ensure proper polarity,
connect each + terminal on the
back of the amplifier or receiver
to the respective + (red)
terminal on each speaker, as
shown in Figure 5. Connect the
– (black) terminals in a similar
way. See the owner's guides
that were included with your
amplifier, receiver and
television to confirm
connection procedures.
SINGLE-STEREO AMPLIFIER
Figure 7.
DUAL-STEREO AMPLIFIER
Figure 8.

FINAL ADJUSTMENTS

Check the speakers for playback, first by setting the system volume control
to a minimum level, and then by applying power to your audio system. Play
a favorite music or video segment and increase the system volume control
to a comfortable level.
NOTE: You should hear balanced audio reproduction across the entire
frequency spectrum. If not, check all wiring connections or consult the
authorized JBL dealer from whom you purchased the system for more help.
The amount of bass you hear and the stereo-image quality will be affected
by a number of different factors, including the room's size and shape, the
construction materials used to build the room, the listener's position relative
to the speakers, and the position of the speakers in the room.
Listen to a variety of music selections and note the bass level. If there is too
much bass, move the speakers away from nearby walls. Conversely, if you
place the speakers closer to the walls, there will be more bass output.
CARE OF YOUR SPEAKER SYSTEM
Each JBL LS Series enclosure has a finish that does not require any routine
maintenance. When needed, use a soft cloth to remove any fingerprints or
dust from the enclosure or grille.
NOTE: Do not use any cleaning products or polishes on the cabinet
or grille.
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