572
5
8.
If there are multiple loudspeaker zones, there probably ought to be a separate 572 for each
zone.
9.
If the power amplifier is larger than 300 watts (70-volt systems), 200 watts (8-ohm systems),
or 100 watts (4-ohm systems), then the internal 5-amp relay can’t handle the load current.
You must use an external relay.
10.
It is good to know the minimum and maximum ambient levels (dB SPL) that the system is
expected to handle. Of course, the sound system should be able to exceed the maximum
ambient by 3-6 dB (unless it’s in the design that the system can’t out-shout the crowd).
11.
It’s preferable that the 572 mix the paging signals with the background music or other
signals internally through its separate paging and music inputs (as opposed to supplying
the 572 with a mix of everything). The 572 monitors its paging inputs and immediately
terminates a sense period when a paging signal is present. This is not true for the music
input.
12.
Loudspeakers from “alien” systems (sound systems located within the sensing zone of the
572, but not under control of the 572) can cause unwanted gain changes.
Connections
A drawing of a typical music with paging system is shown in below. Make all of the following
connections:
1.
Paging microphone (or mic-level mixer output) to the P
AGE
M
IC
XLR connector. Remember
that mic or line paging sources duck the signal connected to the M
USIC
input.
2.
Line-level paging source (or other source) to the P
AGE
terminals on TB1. Remember that
mic or line paging sources duck the signal connected to the M
USIC
input.
3.
Background or foreground music source to the M
USIC
terminals on TB1. Signals connected
to this input are ducked (attenuated) by signals present on either of the P
AGE
inputs.
4.
SPL Computer output from TB1 to your sound system’s amplifier(s).
5.
Your sound system’s amplifier output to the 572’s F
ROM
A
MP
terminals on TB2.
6.
The speaker output of the 572 to the sound system speakers in the controlled zone.
Figure 3-1. 572 generic hookup diagram.
Caution
Failure to connect the 572 to the proper ac mains voltage may cause fire and/
or internal damage. There are no user serviceable parts inside the chassis. Refer all
service to qualified service personnel or to the factory.
Warning
Lethal voltages are present inside the chassis. There are no user serviceable parts
inside the chassis. Refer all service to qualified service personnel or to the factory.
TO/FROM HOUSE
SPEAKER SYSTEM
SPEAKER USED FOR
P.A AND SENSE
SPEAKER USED
FOR P.A.
DOES NOT SENSE
HOUSE
AMPLIFIER
TELEPHONE
SYSTEM
BACKGROUND
MUSIC
PAGE
MICROPHONE
AC INPUT
18W MAXIMUM
POWER
MIC
PAGE
MUSIC
PAGE
LINE INPUTS
OUTPUT
LINE
SPARE
TRIG
SENSE
EXT
CNTRL
RELAY
EXT
AMP
FROM
SPEAKER
TO
1
2
3
4
5
6
7
8
9
0
1
1
B
T
1
2
3
4
5
6
7
8
9
0
1
2
B
T
Vc
THIS UNIT CONTAINS NO USER SERVICABLE PARTS.
FABRIQU AUX E.-U. PAR SYMETRIX INC., LYNNWOOD, WASHINGTON.
É
R F REZ TOUTE R PARATION
UN TECHNICIEN QUALIFI .
É É
É
É
À
UNITED STATES OF AMERICA
LYNNWOOD WASHINGTON,
MANUFACTURED IN
FUSE
PRESS