Installation; Connections; Speakers; Direct Outputs - Omnitronic MPVZ SERIES 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 occurring 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 direct outputs via the screw terminals DIRECT SPEAKER OUTPUT (these are not
affected by the zone controls) and zone outputs via the terminal block 100 V SPEAKER ZONES OUTPUT
are available.
The direct outputs and the terminal blocks are connected in parallel. The total load must not exceed
180 W (MPVZ-180.6), 250 W
RMS
may be damaged by overload.

Direct outputs

Either PA speakers with 70 V and 100 V audio transformers or 4-16  speakers or speaker groups can be
connected.
1
Connect PA speakers to the terminals COM (negative pole) and 70V or 100V (positive pole).
Connect low-impedance speakers to the terminals COM (negative pole) and 4-16  (positive pole).
2
3
When connecting, observe the correct polarity (positive and negative connections). The positive
connection of the speakers cables is always specially marked.

Zone outputs

For the six PA zones, PA speakers with 100 V audio transformer can be connected to the zone outputs.
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!
(MPVZ-250.6) or 350 W
RMS
≙ Impedance
8 
4  (parallel)
16  (in line)
2.66  (parallel)
24  (in line)
2  (parallel)
24/28
(MPVZ-350.6), otherwise the amplifier
RMS
00056952.DOC, Version 1.1