Installation; Connections; Speakers - Omnitronic PAP Series User Manual

5

INSTALLATION

This amplifier is built for 483 mm racks (19"). This rack should be a double-door rack where front panel and
•
rear panel can be opened. The rack should be provided with a cooling fan. When mounting the amplifier
into the rack, please make sure that there is enough space around the device so that the heated air can be
passed on. Steady overheating will damage your device.
You can fix the amplifier with four screws M6 in the rack. If several devices are to be installed, make sure
•
that you leave 1 unit (1 U) space between the devices. Be careful when mounting the amplifier into the
rack. Put the heaviest devices into the lower part of the rack. Be aware that fastening the amplifier with four
screws on the front panel is not enough. In order to ensure safety, additional fastening by using ground
and side bars is necessary.
If racks are to be transported or used for mobile use, fasten the devices additionally by connecting the rear
•
brackets with the side or ground bars of the rack. Thus, the amplifier cannot be pushed backwards. The
front panel alone is not designed to absorb acceleration forces occurring during transportation.
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6

CONNECTIONS

High voltage at terminals when using PA systems. Installation by skilled personnel only!
Turn off amplifier before connecting.

Speakers

Either PA speakers with 70 V or 100 V audio transformer or 4-16 Ω speakers or speaker groups with a total
impedance of at least 16 Ω can be connected.
• Connect PA speakers to the terminals "COM" (negative pole) and "100 V" or "70 V".
• Connect low-impedance speakers to the terminals "COM" (negative pole) and "4-16 Ω" (positive pole).
• When connecting, observe the correct polarity (positive and negative connections). The terminal "COM" is
always the negative pole. The positive connection of the speaker cables is always specially marked.
The total load must not exceed 60 W
(PAP-350), 650 W (PAP-650), or 1000 W
RMS
overload.
Notes
Example for the calculation number of speakers/impedance:
Number of speakers
1 speaker at 8 Ω
2 speakers at 8 Ω each
2 speakers at 8 Ω each
3 speakers at 8 Ω each
3 speakers at 8 Ω each
4 speakers at 8 Ω each
The input impedance of the speaker systems should at least be the same or even higher than the output
impedance of the amplifier.
Information on choosing appropriate connection cables
• Speaker systems must only be connected via sufficiently dimensioned cables. Too thin cables lead to cable
heatup or enormous power loss and loss in sound quality.
• For all speaker systems up to 400 Watts, we recommend a cable diameter of 2.5 mm², for all other speaker
cables 4 mm².
DANGER TO LIFE!
(PAP-60), 120 W
RMS
(PAP-1000), otherwise the amplifier may be damaged by
RMS
≙ ≙ ≙ ≙ Impedance
8 Ω
4 Ω (parallel)
16 Ω (in line)
2.66 Ω (parallel)
24 Ω (in line)
2 Ω (parallel)
19
(PAP-120), 240 W
RMS RMS
(PAP-240) 350 W
RMS