Crown SST-SBSC Spécifications télécharger pdf (Page 15)

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CE-Series

Amps with an Attitude!

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CE-Series

Amps with an Attitude!

Reference Manual

On the other hand, an unbalanced circuit usually holds one

leg at ground potential, while the second leg is “hot.” Unbal-

anced line is less expensive, but is much more susceptible to

noise, and is not usually used in professional applications. For

the cleanest signal, without unwanted hum and buzz, bal-

anced line is always recommended. It is especially helpful if

you have a long cable run (over 10 feet (3 m)), since noise is

easily introduced into long, unbalanced lines.

–

GND

FROM

SOURCE

INPUT

BALANCED

–

SHIELD

FROM

SOURCE

INPUT

UNBALANCED

SHIELD

4 Crown Pro Information Guides

Balancing the Line

A balanced audio circuit typically will have both positive (+)

and negative (–) legs of the circuit isolated from the ground

circuit. These balanced legs exhibit identical impedance char-

acteristics with respect to ground, and may also carry the au-

dio signal at the same level, but with opposite polarities. This

results in a line that offers excellent rejection of unwanted

noise.

Fig. 4.1

Balanced &

Unbalanced

Input Wiring

Fig. 4.2

Polarity

Conversions

Stereo mode provides identical power output to each of the

two amplifier output channels. Bridge-Mono mode combines

the two amplifier output channels into a single mono channel

with twice the voltage of a single stereo channel. This means

the output will be much more powerful! It does this by bridging

the outputs, and it requires special output wiring. Do NOT se-

lect Bridge-Mono mode without first making sure the am-

plifier has been wired in a Bridge-Mono configuration. For

more information on wiring for Bridge-Mono mode, see the In-

stallation section of this manual

or consult your system in-

staller.

When Bridge-Mono mode is selected, only the Channel 1 Level

control and the Channel 1 Signal LED will work. If the Channel

2 input is wired, the Channel 2 Level control should be turned

to “∞”

(counter/anti-clockwise) to prevent distortion.

Fault Jack: This RJ-11 jack (which looks like a phone jack)

is located on the back panel. By attaching a signalling device

to the Fault jack, you can monitor the amplifier’s Fault status

from a remote location. See the Advanced Features and Op-

tions section of this manual

for more information on fault moni-

toring and suggestions for signalling device circuitry.

1/4 inch XLR

(6.35 mm)

Tip = + =Pin 2

Ring = – =Pin 3

Sleeve = = Pin 1

Refer to Figure 4.2 for proper pin assignments for both 6.35-

mm and 3-pin XLR balanced audio wiring.

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Crown SST-SBSC Spécifications Page 15

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