Crown Audio D-75A, D-45 2Setup, 2.6Wire Your System 2.6.1 Dual Mode, Bridge-MonoMode, page

D Series Power Amplifiers

2Setup

2.6Wire Your System

2.6.1 Dual Mode

Typical input and output wiring is shown in Figure 2.6.

INPUTS: Connect input wiring for each channel.

OUTPUTS: Maintain proper polarity (+/-) on output connec- tors.

Connect Channel 1 positive (+) speaker load to Channel 1 positive terminal of amp; repeat for negative (-). Repeat each channel wiring as for Channel 1. Refer to Section 2.5 for out- put connector pin assignments.

2.6.2 Bridge-Mono Mode

Your amplifier is factory-configured for dual (stereo) opera- tion. As an option, the unit can be configured for higher power, single-channel, bridge-mono mode by an authorized Crown Service Center. To prevent damage to the amplifier, do not operate the unit in bridge-mono mode without the Service Center modification.

Typical input and output wiring is shown in Figure 2.7.

INPUTS: Connect input wiring only to CH 1.

OUTPUTS: Connect the speaker across the positive output terminals. Do not use the negative terminals when the ampli- fier is being operated in Bridge-Mono mode.

NOTE: Crown provides a reference of wiring pin assign- ments for commonly used connector types in the Crown Amplifier Application Guide available at www.crownau- dio.com.

NOTE: When operating in Bridge-Mono mode, turn down (full CCW) the CH 2 level control. The CH 1 level control works both channels.

If your loudspeakers don’t need the additional volt- age, and you only have one input signal to drive mul- tiple loudspeakers, you can use bridge-mono mode without 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 (positive goes to negative, and negative goes to positive).

Figure 2.6

System Wiring

for Dual Mode

Figure 2.7

System Wiring

for Bridge-Mono

Mode

Do not wire the amplifier in bridge-mono mode without having it modified by an authorized Crown Service Center.

page 8 Operation Manual