Filter
Top Products
Commercial Audio Series Mixer-Amplifiers
page 13
Operation Manual
2 Setup
Output
Transformer
Power
AMP 1
Ch 1 Priority
[SW2]
CH 1
Tone Control
Master 1
AMP Out 1
Clip 1
Preamp Line Out 1
Mute
Tone
Generator
Scaling
Bass Treble
Gain 1
SPI
Input Gain
Mic/Line
[Bal]
RCA
280MA Block Diagram
Line
Mic
Pre-Announce
Chime
Ch 1 Normal
[SW1]
Ch 1 to Amp 1
[SW9]
Ch 1 to Amp 2
[SW10]
VC A
Pre-Announce Gain
Phantom Powe
r
VCA
HP Filter
SPI 1
100V
70V
4 Ohms
COM
CH 2
Tone Control
Bass Treble
Gain 2
SPI
RCA
Line
Mic
Ch 2 to Amp 1
[SW11]
Ch 2 to Amp 2
[SW12]
Mic/Line
[Bal]
Input Gain
Ch 5 Priority
[SW6]
CH 5
Tone Control
Bass Treble
Gain 5
SPI
Input Gain
Mic/Line
[Bal]
RCA
Line
Mic
Ch 5 Normal
[SW5]
Ch 5 to Amp 1
[SW17]
Ch 5 to Amp 2
[SW18]
CH 6
Tone Control
Bass Treble
Gain 6
SPI
RCA
Line
Mic
Ch 6 to Amp 1
[SW19]
Ch 6 to Amp 2
[SW20]
Mic/Line
[Bal]
Input Gain
Ch 3 and Ch 4 similar to Ch 2
Ch 7 and Ch 8 similar to Ch 6
Out
In
Amp Input 1
Limiter
VCA 1
Ch 1 Amp 1
Mute
Ch 5 Amp 2
Mute
Output
Transformer
Power
AMP 2
Master 2
AMP Out 2
Clip 2
Preamp
Line Out 2
Scaling
VCA
VC A
HP Filter
SPI 2
100V
70V
4 Ohms
COM
Out
In
Amp Input 2
Limiter
VCA 2
Z1
Z2
Z3
Z4
Tone Gen Level
Amp 2
Tone Gen Level
Amp 1
Pre-Announce
Bell
Alert
Evac
Ch 1 Over Ch 5
[SW 4]
Ch 1 Over Ch 5
[SW 3]
Typical Signal Path, Amp 1
Typical Signal Path, Amp 2
Link
Priority
Link
Priority
Version 1.0
Authorized personnel only:
Remove internal jumpers Z1 and Z4
to disable tones for Amp 1
Authorized personnel only:
Remove internal jumpers Z2 and Z3
to disable tones for Amp 2
2.15 Block Diagram