Setting Up The Amplifier; Operating Elements - Monacor PA-306 Instruction Manual

PA-306
MIC CH 1
1 2
PA Mixing Amplifier
Please read these instructions carefully prior to
operation and keep them for later reference .
Connection of the speakers (chapte 4 .2,
item 10) requires adequate technical knowl-
230 V~/50Hz
edge in 100 V PA technology and is to be
made by experts only . Operation of the ampli-
fier is easy, even for adults without any expert
knowledge . However, in case of any queries,
FUSE
please contact your installer or retailer .
8 9
1 Safety Notes
This unit corresponds to all relevant directives
of the EU and is therefore marked with
WARNING The unit uses dangerous
mains voltage . Leave servic-
ing to skilled personnel only
and do not insert anything
into the air vents! Inexpert handling of the
unit may result in electric shock .
During operation, there is a hazard of con-
tact with a dangerous voltage up to 100 V
at the speaker terminals (10) . Always fold
down the protective cover when operating
the amplifier .
Always switch off the amplifier before mak-
ing any connection .
•
The unit is suitable for indoor use only . Pro-
tect it against dripping water and splash
water, high air humidity and heat (admissi-
ble ambient temperature range: 0 – 40 °C) .
•
Do not place any vessel filled with liquid on
the unit, e . g . a drinking glass .
•
The heat generated inside the unit must
be dissipated by air circulation . Therefore,
never cover the air vents .
•
Do not operate the unit and immediately
disconnect the mains plug from the socket
1 . if the unit or the mains cable is visibly
damaged,
2 . if a defect might have occurred after the
unit was dropped or suffered a similar
accident,
3 . if malfunctions occur .
In any case the unit must be repaired by
skilled personnel .
•
Never pull the mains cable to disconnect
the mains plug from the socket, always
seize the plug .
•
For cleaning only use a dry, soft cloth; never
use water or chemicals .
•
No guarantee claims for the unit and no li-
ability for any resulting personal damage or
material damage will be accepted if the unit
6
CHANNEL 1 CHANNEL 2 CHANNEL 3 CHANNEL 4
3
is used for other purposes than originally
intended, if it is not correctly connected
or operated, or if it is not repaired in an
expert way .
If the unit is to be put out of oper-
OUTPUT MUTE
LEVEL ation definitively, take it to a local
COM COM COM 4-16 Ω 70 V 100 V
recycling plant for a disposal which
is not harmful to the environment .
MIN MAX BAL/UNBAL
2 Applications
10 11 12
This amplifier with a RMS output power of
PA-306
.
PA-312
PA-324
is specially designed for PA systems . Either
use 100 V or 70 V speakers or low resistance
speakers (minimum impedance 4 Ω) .
The amplifier is equipped with 6 inputs:
1 × line level input TEL INPUT for important
an nouncements (e . g . from a telephone
system) taking priority over all other in-
puts, i . e . with a signal present at the
input, the signals of the other inputs will
be faded out
1 × microphone / line level CH 1 for important
announcements taking priority over the
inputs CH 2 – CH 5, i . e . with a signal pres-
ent at the input CH 1, the volume of the
signals at the inputs of lower priority will
be attenuated
2 × microphone inputs CH 2 and CH 3
2 × line level inputs CH 4 and CH 5, e . g . for
background music from an MP3 / CD
player, radio or tape deck

3 Setting Up the Amplifier

The amplifier is designed for installation into
a rack for units of a width of 482 mm (19");
however, it is also suitable as a tabletop unit .
In order to ensure a sufficient cooling of the
amplifier, air must always be able to flow
freely through all air vents .
3.1 Rack installation
For rack installation, fasten the two mounting
brackets (1) with screws to the sides of the
amplifier . In the rack, the amplifier requires
a space of 2 RS (2 rack spaces = 89 mm) . To
prevent the rack from becoming top-heavy,
insert the amplifier into the lower section of
the rack . The mounting brackets alone are
not sufficient for fixing it safely; additionally
TEMP PROT
CHANNEL 5 TEL BASS
MIC/LINE INPUT MIC INPUT TEL INPUT
CH 1
PH.PWR
+ 48 V
CH 2 CH 3
G
ON
GAIN OFF
LINE MIC
13 14 15 16
60 W
120 W
240 W
ON
2 4 6 8 10 CLIP
TREBLE MASTER POWER
4 5 6 7
use lateral rails or a bottom plate to secure
the unit .
The hot air given off by the amplifier must
be dissipated from the rack, otherwise heat
will accumulate in the rack which may not
only damage the amplifier but also other units
LINE INPUT OUTPUT
CH 4 CH 5
in the rack . In case of insufficient heat dissi-
L
pation, install a ventilation (e . g . DPVEN-04)
R
unit into the rack .

4 Operating Elements

17 18
and Connections
4.1 Front panel
1 Mounting bracket (2 ×) to install the am-
plifier into a rack for units of a width of
482 mm (19")
2 Input MIC CH 1 (6 .3 mm jack, unbal .) to
connect a microphone
The jack is connected in parallel with the
jack CH 1 (12) on the rear panel; however,
it is not able to supply phantom power .
The input MIC CH 1 has a priority cir-
cuit: When an announcement is made
via this input, the volume of the inputs
CH 2, CH 3 (15), CH 4 and CH 5 (17) will
be automatically attenuated so that it is
easier to understand the announcement .
To adjust the level of volume attenuation,
use the control MUTE LEVEL (11) .
3 Input level control to mix or fade in / fade
out the input signals
4 Tone controls BASS and TREBLE
5 Control MASTER for the volume of the
mixed signal at the line outputs and
speaker outputs (18, 10)
6 Output level indication
LED TEMP to indicate overheating
LED PROT to indicate short circuit or over-
load of the speaker outputs (10)
If the overload LED CLIP lights up more
than briefly, turn back the control
MASTER (5) or the corresponding input
control (3) .
If the LED TEMP lights up, improve the
ventilation of the amplifier . As soon as the
amplifier has cooled down, the LED TEMP
is extinguished .
If the LED PROT lights up, switch off the
amplifier and eliminate the overload or
the short circuit at the speaker outputs .
Then the LED PROT is extinguished . If you
are not able to identify the fault, consult
skilled personnel .
7 POWER switch with power LED ON
directly above
1