Crown Audio 180MA 2.15Block Diagram, 2Setup, Commercial Audio Series Mixer-Amplifiers, page

Commercial Audio Series Mixer-Amplifiers

2Setup

2.15Block Diagram

Phantom Power		Pre-Announce	Pre-Announce	Pre-Announce Gain
	Input Gain
			Chim e
Mic/Line	Line
	Mi c
[Bal]
			SPI
		CH 1	Tone Control
				Ch 1 Normal
RCA				[SW1]
		Gain 1	Bass	Trebl e
	Input Gain
Mic/Line	Line
	Mi c
[Bal]
			SPI
		CH 2	Tone Control
RCA

Gain 2Bass Trebl e

			Ch 3 and Ch 4 similar to Ch				2
	Input Gain
Mic/Line		Line
		Mi c
[Bal]				SPI
			CH 5
						Tone Control
								Ch 5 Normal
RCA
								[SW5]
			Gain 5		Bass		Trebl e
	Input Gain
Mic/Line		Line
		Mi c
[Bal]				SPI
			CH 6
						Tone Control
RCA
			Gain 6		Bass		Trebl e

Ch 7 and Ch 8 similar to Ch 6

280MA Block Diagram

Version 1.0

Preamp Line Out 1

SPI 1

Clip 1

AMP Out 1

Ch 1 Priority

Link

Ou t

Output

100V

[SW2]

Power

70V

Transformer

In

VCA

AMP 1

VC A

HP Filter

4 Ohms

Amp Input 1

COM

Ch 1 to Amp 1

Limiter

[SW9]

Master 1

VCA 1

Scaling

Ch 1 to Amp 2

Mute

Tone Gen Level

Amp 1

[SW10]

Ch 2 to Amp 1

Ch 1 Amp

1

Z1

Authorized personnel only:

Tone

Remove internal jumpers Z1 and Z4

[SW11]

Priority

Bell

Generator

Z2

to disable tones for Amp 1

Ch 5 Amp

2

Z3

Alert

Evac

Z4

Authorized personnel only:

Ch 2 to Amp 2

Remove internal jumpers Z2 and Z3

to disable tones for Amp 2

[SW12]

Tone Gen Level

Amp 2

Preamp

SPI 2

Clip 2

Line Out

2

Ch 5 Priority

Mute

Link

Ou t

Power

[SW6]

In

HP Filter

AMP 2

Mute

VCA

VC A

Ch 1 Over Ch

5

Amp Input 2

Ch 5 to Amp 1

[SW 4]

Limiter

[SW17]

Priority

Master 2

VCA

2

Scaling

Ch 1 Over Ch

5

Ch 5 to Amp 2

[SW 3]

[SW18]

AMP Out

2

Ch 6 to Amp 1

Output

100V

[SW19]

70V

Transformer

4 Ohms

COM Ch 6 to Amp 2

[SW20]	Typical Signal Path, Amp 1
	Typical Signal Path, Amp 2

Operation Manual page 13