Installation; Connections; Speakers; Direct Outputs - Omnitronic MPVZ-180.6 Bedienungsanleitung

6. 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 occuring during transportation.

7. CONNECTIONS

7.1 Speakers

High voltage at terminals when using PA systems. Installation by skilled personnel only! Turn off
amplifier before connecting.
For connecting speakers either direct outputs via the screw terminals DIRECT SPEAKER OUTPUT (these
are not affected by the zone controls) or zone outputs via the terminal block 100 V SPEAKER ZONES
OUTPUT are available.
Never use the direct outputs and the zone outputs at the same time, otherwise the amplifier will be

7.1.1 Direct outputs

Either PA speakers with 70 V and 100 V audio transformers or 4-16
connected.
1. Connect PA speakers to the terminals COM (negative pole) and 70V or 100V (positive pole). The total
load must not exceed 180 W
otherwise the amplifier may be damaged by overload.
2. Connect low-impedance speakers to the terminals COM (negative pole) and 4-16
3. When connecting, observe the correct polarity (positive and negative connections). The positive
connection of the speakers cables is always specially marked.
Example for the calculation number of speakers/impedance when using low-impedance speakers
Number of speakers
1 speaker at 8
2 speakers at 8 each
2 speakers at 8 each
3 speakers at 8 each
3 speakers at 8 each
4 speakers at 8 each
• The input impedance of the speaker systems should at least be the same or even higher than the output
impedance of the amplifier.
DANGER TO LIFE!
CAUTION!
overloaded.
(MPVZ-180.6), 250 W
RMS
Impedance
8
4 (parallel)
16 (in line)
2.66 (parallel)
24 (in line)
2 (parallel)
24/28
speakers or speaker groups can be
(MPVZ-250.6) or 350 W
RMS
00056952.DOC, Version 1.0
(MPVZ-350.6),
RMS
(positive pole).