JBL SC305 User Manual

SC305

CENTER CHANNEL

SPEAKER

OWNER’S

MANUAL

INTRODUCTION

Congratulations on choosing JBL
Series loudspeakers. Their highly
accurate, uncolored and balanced
sound character will greatly increase
your enjoyment of recorded music.
JBL speakers are built with careful
attention to detail, using only the
highest quality materials. They will
provide many years of excellent per­formance.

The SC305 Center Channel Speaker
is the result of concentrated efforts to
combine traditional JBL performance
values with elegant contemporary
appearance. Some of the engineer­ing features of the SC305 are:

Smooth, extended response:

The 14mm Titanium Laminate dome
tweeter, dual 5" polymer laminated
cone drivers and carefully designed
dividing network deliver the clear,
crisp, quality sound reproduction
needed to deliver the accurate, intelli­gible vocal information required by a
center channel speaker.

305

SC

High Quality Crossover
Network: the computer-optimized

dividing network employs up to third­order (18 dB per octave) crossover
sections. JBL's use of high quality
capacitors and low-loss/low-distortion
inductors assures freedom from
phase or amplitude distortions.

Magnetic Shielding: prevents stray

Fig.2

Fig.1

magnetic fields from creating any
interference or distortion of the video
picture. This allows placement of the
SC305 directly on top of, or directly
below the video monitor.

Cabinet Design: the multi-angled

cabinet provides options of locating
the SC305 directly on top of the video
monitor or on the floor in front of the
monitor.

PLACEMENT

As the center channel contains the
dialog and other central action
sounds, the speaker should be locat­ed very close to the video monitor
centered with the monitor's center line.
The SC305 can be placed in two loca­tions:

1) On top of the video monitor.

Place the large flat bottom of the
speaker directly on top of the monitor,
with the front edge of the speaker
grille flush with the edge of the moni­tor. The speaker grille/baffle should
be pointing directly at the listener.
See Fig. 1.

2) On the floor directly in front of the
monitor.

cabinet on the floor so that the speak­er grille/baffle is pointing directly
at the listener. The grille can be
removed and re-installed so the JBL
Logo is oriented properly. See Fig. 2.

Place the angled side of the

CENTER LINE

CONNECTIONS

To connect the SC305 to the center
channel output of your AV receiver or
amplifier, use two-conductor insulated
wire. Your JBL dealer can recommend
suitable cables, or you can buy wire at
most hardware stores. We recom­mend #16 AWG wire as a minimum
size. If your speaker is more than 30
feet (10 m) from your AV receiver or
amplifier, use larger diameter wire.
Connections are made at the termi­nals located on the back of the SC305
speaker. The terminals accept bare
wire or dual banana plugs, either of
which will provide easy, secure con­nections.

CENTER
LINE

Preparing the hookup wire

1. First determine the distance

between the most distant speaker.

2. Now make the hookup wires for
both speakers this length, even if one
loudspeaker is much closer to your
amplifier than the other. This will help
maintain proper signal balance.

3. Strip off 3/8" of insulation from both
ends of each conductor.

2