Setup; Installation; Cable Connections; Powering Up - Omnitronic PM-444Pi Bedienungsanleitung

5 Setup

Installation

Install the unit on a plane surface or in your rack. For 19" (483 mm) rack installation, 4 units are required.
When mounting the unit 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 unit with
four screws M6 in the rack.

Cable connections

The mixer offers numerous, highly flexible possibilities for balanced or unbalanced connection of
professional audio equipment. To avoid interfering noise, switch off the mixer or set the output controls to
minimum prior to connecting and disconnecting equipment. Be sure to use only short, high-grade cables.
The illustrations below show the wiring of these cables.
Note
If the mixer is connected to both a computer and to a unit grounded via the mains cable (e.g. amplifier),
noise interference may occur due to ground loops. To eliminate this interference, a ground isolator (e. g.
OMNITRONIC LH-082) may be used to connect the mixer to the unit.
Connector
XLR, male
XLR, female
6.3mm jack, stereo
6.3 mm jack, mono
RCA

Powering up

To protect your audio equipment, specifically your speakers, follow this power-up sequence: Set all output
volume controls of any equipment to minimum. Switch on your audio sources first, then the mixer. Always
switch on amplifiers last. Then turn up the volume control on your sources (if provided) and set the output
volume of the mixer to a low level. Turn up the volume controls of your amplifier(s) slowly. Make adjustments
to all volume settings as needed. For switching off, follow the inverse sequence: always switch off amplifiers
first, then the mixer and then the audio sources.
Structure Balanced
connection
red = 2
black = 3
shield = 1
red = 2
black = 3
shield = 1
red = tip
black = ring
shield = sleeve
red = tip
black = ring
shield = n/c
red = tip
black = sleeve
shield = n/c
16 • EN
Unbalanced
connection
red = 2
shield = 1 + 3
red = 2
shield = 1 + 3
red = tip
shield = sleeve +
ring
red = tip
shield = sleeve
red = tip
shield = sleeve