Crown D-75A Referans Kılavuzu - Sayfa 7

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D-45 / D-75A Power Amplifiers

DUAL MODE

FROM THE FACTORY, YOUR AMPLIFIER

IS CONFIGURED FOR DUAL OPERATION

D-75A / D-45 AMPLIFIER

BRIDGE-MONO MODE

TO CHANGE THE DUAL/MONO

MODE, REFER TO APPENDIX A

D-75A / D-45 AMPLIFIER

loudspeakers, you can use bridge-mono mode with-

out actually bridging the outputs. Bridge-mono mode

is like dual mode except the channel 1 input feeds both

outputs, and the channel 2 output is inverted. To use

bridge-mono mode without bridging the outputs, wire

your loudspeakers as you would for dual mode, but

invert the polarity of the channel 2 output wiring (posi-

tive goes to negative, and negative goes to positive).

2.3.2 Input Connection

The balanced combination XLR/phone inputs have a

typical impedance of 20 K ohms. With unbalanced wir-

ing, input impedance is typically 10 K ohms. The line

level output from most devices is sufficient to drive the

inputs. The XLR connectors are wired with pin 1 as

ground, pin 2 as positive (+) and pin 3 as negative (–);

the phone connectors are wired with tip as positive (+),

ring as negative (–) and sleeve as ground. Be sure to

use shielded cables with unbalanced sources.

CAUTION: Never connect input and output grounds

together.

CHANNEL 2

REMPLACER

SEULMENT

CH-2

CH-1

OUTPUTS

REPLACE ONLY WITH

3AG–2A 125/250V

–

CHANNEL 2

LOUDSPEAKER

DO NOT

USE

REMPLACER

SEULMENT

CH-2

CH-1

OUTPUTS

REPLACE ONLY WITH

3AG–2A 125/250V

CONNECT THE LOAD ACROSS THE POSITIVE (+)

OUTPUT TERMINALS. FOR PROPER POLARITY,

CONNECT THE CHANNEL 1 OUTPUT TO THE

POSITIVE (+) LOUDSPEAKER LEAD.

Fig. 2.2 System Connection

MIXER

CHANNEL 1

CH-2

INPUTS

CH-1

XLR WIRING

GND

PHONE WIRING

IMPORTANT:

TIP

IN MONO MODE USE

–

RING

PUSH

THE CH-1 INPUT ONLY.

GND

SLEEVE

–

CHANNEL 1

MIXER

DO NOT

CHANNEL 1

USE

CH-2

INPUTS

CH-1

XLR WIRING

GND

PHONE WIRING

IMPORTANT:

TIP

IN MONO MODE USE

–

RING

PUSH

THE CH-1 INPUT ONLY.

GND

SLEEVE

–

Input Wiring Tips

BALANCED

GND

–

FROM

INPUT

SOURCE

–

SHIELD

1. Use only shielded cable.

2. Avoid unbalanced lines longer than

10 feet (3 meters).

3. Keep signal and power wiring apart.

4. Turn off the unit before making connec-

tions. Crown is not liable for injury or

damage due to overdriven components.

UNBALANCED

SHIELD

FROM

INPUT

SOURCE

SHIELD

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