OMNITRONIC PM-444Pi 4 Channel DJ Mixer with Bluetooth User Manual

: June 5, 2024
: OMNITRONIC

Table of Contents

Introduction
Safety Instructions
Operating Determinations
Operating Elements and Connections
Setup
Operation
Cleaning and Maintenance
Technical Specifications
References
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OMNITRONIC PM-444Pi 4 Channel DJ Mixer with Bluetooth User Manual

Introduction

Welcome to Omnitronic! Thank you for choosing one of our products.

This user manual will show you how to install and operate the mixer. Users of this product are recommended to carefully read all warnings in this manual and on the unit in order to protect yourself and others from damage.

Please save this document for future needs and pass it on to further owners.

This user manual is valid for item number: 10006825. Please save this document for future needs and pass it on to further owners.

Product features

4 input channels with gain control, LED level meter, 3-band equalizer, cue button and channel fader
1 DJ microphone channel with level control,
2-band equalizer, on/off and talkover switch
Integrated Bluetooth audio streaming for your smartphones and tablets
MP3 player with USB port and blue LCD screen
Built-in USB audio interface allows recordings and playback of digital audio files with a computer (PC and Mac)
Pre-fader listening to all stereo input channels and the master output via adjustable stereo headphones output
Crossfader with assignment switches
Master channel with level and balance control
10-digit stereo LED level meter
Adjustable monitor output (DJ booth)
7 line and 2 phono inputs via RCA jacks
Balanced XLR and RCA outputs
Additional recording output

Safety Instructions

Caution!
Keep this device away from rain and moisture!

Caution!
Be careful with your operations. With a dangerous voltage you can suffer a dangerous electric shock when touching the wires!

This device has left our premises in absolutely perfect condition. In order to maintain this condition and to ensure a safe operation, it is absolutely necessary for the user to follow the safety instructions and warning notes written in this user manual. Damages caused by the disregard of this user manual are not subject to warranty. The dealer will not accept liability for any resulting defects or problems.

Unpacking

Please make sure that there are no obvious transport damages. Should you notice any damages, do not take the device into operation and immediately consult your local dealer.
Save the package and all packing materials. In the event that a fixture must be returned to the factory, it is important that the fixture be returned in the original factory box and packing.

Protection Class

This device falls under protection-class II and features a protective insulation. The voltage and frequency must exactly be the same as stated on the device. Wrong voltages or power outlets can lead to the destruction of the device and to mortal electrical shock.

Power Cord

Always plug in the power plug least. The power plug must always be inserted without force.
Make sure that the plug is tightly connected with the outlet.
Never let the power cord come into contact with other cables! Handle the power cord and all connections with the mains with particular caution! Never touch them with wet hands, as this could lead to mortal electrical shock.
Never modify, bend, strain mechanically, put pressure on, pull or heat up the power cord.
Never operate next to sources of heat or cold.
Disregard can lead to power cord damages, fire or mortal electrical shock.
The cable insert or the female part in the device must never be strained. There must always be sufficient cable to the device. Otherwise, the cable may be damaged which may lead to mortal damage.
Make sure that the power cord is never crimped or damaged by sharp edges. Check the device and the power cord from time to time.
If extension cords are used, make sure that the core diameter is sufficient for the required power consumption of the device. All warnings concerning the power cords are also valid for possible extension cords.
Always disconnect from the mains, when the device is not in use or before cleaning it. Only handle the power cord by the plug. Never pull out the plug by tugging the power cord.
Otherwise, the cable or plug can be damaged leading to mortal electrical shock. If the power plug or the power switch is not accessible, the device must be disconnected via the mains.
If the power plug or the device is dusty, the device must be taken out of operation, disconnected and then be cleaned with a dry cloth. Dust can reduce the insulation which may lead to mortal electrical shock. More severe dirt in and at the device should only be removed by a specialist.

Liquids

There must never enter any liquid into power outlets, extension cords or any holes in the housing of the device. If you suppose that also a minimal amount of liquid may have entered the device, it must immediately be disconnected.
This is also valid, if the device was exposed to high humidity. Also if the device is still running, the device must be checked by a specialist if the liquid has reduced any insulation. Reduced insulation can cause mortal electrical shock.

Foreign Objects

There must never be any objects entering into the device. This is especially valid for metal parts. If any metal parts like staples or coarse metal chips enter into the device, the device must be taken out of operation and disconnected immediately. Malfunction or shortcircuits caused by metal parts may cause mortal injuries.

Operating Determinations

This device is used to mix audio sources. It has been specially designed for professional applications.

Power Supply

Only connect the device to a properly installed mains outlet. The outlet must be protected by residual current breaker (RCD). The voltage and frequency must exactly be the same as stated on the device. If the mains cable is equipped with an earthing contact, then it must be connected to an outlet with a protective ground.
Never deactivate the protective ground of a mains cable. Failure to do so could possibly injure the user.

Installation

Do not shake the device. Avoid brute force when installing or operating the device. When choosing the installation spot, please make sure that the device is not exposed to extreme heat, moisture or dust. There should not be any cables lying around. You endanger your own and the safety of others!

Taking into Operation

Operate the device only after having familiarized with its functions. Do not permit operation by persons not qualified for operating the device.
Most damages are the result of unprofessional operation!

Ambient Conditions

The ambient temperature must always be between -5° C and +45° C. Keep away from direct insulation (particularly in cars) and heaters. The relative humidity must not exceed 50 % with an ambient temperature of 45° C.
This device must only be operated in an altitude between -20 and 2000 m over NN.
Never use the device during thunderstorms. Over voltage could destroy the device. Always disconnect the device during thunderstorms.
This device must never be operated or stockpiled in surroundings where splash water, rain, moisture or fog may harm the device.
Moisture or very high humidity can reduce the insulation and lead to mortal electrical shocks.
When using smoke machines, make sure that the device is never exposed to the direct smoke jet and is installed in a distance of 0.5 meters between smoke machine and device.

Serial Barcode

Never remove the serial barcode from the device as this would make the guarantee void.

Transport

Please use the original packaging if the device is to be transported.

Cleaning and Service

Disconnect from mains before cleaning! Never use solvents or aggressive detergents in order to clean the device! Rather use a soft and damp cloth.
There are no serviceable parts inside the device except for the fuse. Maintenance and service operations are only to be carried out by authorized dealers! Should you need any spare parts, please use genuine parts.

Modifications and Guarantee

Please consider that unauthorized modifications on the speaker system are forbidden due to safety reasons!
If this device will be operated in any way different to the one described in this manual, the product may suffer damages and the guarantee becomes void. Furthermore, any other operation may lead to dangers like short-circuit, burns, electric shock, etc.

Potecting the environment

When to be definitively put out of operation, take the product to a local recycling plant for a disposal which is not harmful to the environment. Devices marked with this symbol must not be disposed of as household waste.
Contact your retailer or local authorities for more information. Remove any inserted batteries and dispose of them separately from the product.

Operating Elements and Connections

Operating Elements and Connections Operating Elements and
Connections

No.	Element	Function
1	DJ MIC input	Balanced XLR input for connecting a DJ microphone.
2	GAIN control	Volume control for the DJ microphone.
3	HIGH, LOW tone controls	Allows the adjustment of the high and low range

for the DJ microphone.
4| Microphone selector| On/off switch with LED indicator for the microphone. Select TALKOVER to attenuate the level of channel 1-4 in case of microphone announcements.
5| Input source selector| Selects the input source to be used with the respective input channel.
6| GAIN control| For adjusting the input amplification for the respective input channel. The adjacent LED meter indicates the channel level ahead of the channel fader.
7| HIGH, MID, LOW tone controls| Allows the adjustment of the high, mid and low range for the respective input channel.
8| CUE assign switch with LED| Assigns the respective channel to the headphone bus for pre-fader- listening by means of the headphone output. The LED indicates the pressed position.
9| Crossfader assignment switches| Allows to send the respective channel’s signal either directly to the master bus, or to the left side of the crossfader when set to position “A”, or to the right side of the crossfader when set to the position “B”. When all input channels are assigned directly to the master bus, the crossfader is disabled and the desired volume ratio can be set with the channel controls.
10| Channel faders| Level controls for the respective input channel.
11| Crossfader| For crossfading between two of the input channels selected with the assignment switches. In mid-position, both channels can be heard at the same volume.
12| LCD screen for the audio player| Shows the playback source and elapsed time as well as scrolling text information about the current track and total remaining time in USB mode.
13| USB port| For connecting a USB storage device.
14| MODE button| For switching between USB device, Bluetooth and PC signal.
15| and button| For title selection and fast forward/rewind.
16| PLAY/STOP| For playback control.
17| PAIRING button| For pairing/unpairing Bluetooth devices.
18| MASTER LEVEL control| Level control for the master signal at the master outputs.
19| CUE MIX control| For selecting and crossfading the monitoring signal for the headphones output

left position: the prefader level of the input channel of which the button CUE is pressed is monitored.
right position: the music program currently playing is monitored ahead of the master control

20| BALANCE control| For adjusting the balance left/right of the stereo channels.
21| Cue LEVEL control| Level control for the headphones output
22| BOOTH LEVEL control| Level control for the monitor output
23| Output level LED meter| 10-digit LED meter of the master signal within the range of -13 dB to +3 dB.
24| Headphones outputs| 3.5 mm/6.3 mm jacks for connecting stereo headphones. Turn the level control (21) down before plugging in any headphones, as sudden high-volume impact may damage your ears.
25| Line inputs 2-7| Stereo inputs LINE (RCA) for channel 1 to 4 for connecting units with line level outputs (e.g. CD players).
26| Power switch| Turns the unit on and off.
27| Power input| Plug in the supplied power cable here.
28| Master output, bal.| Stereo master output (XLR) for connecting an amplifier.
29| Master output, unbal.| Stereo master output (RCA) for connecting an amplifier.
30| BOOTH output| Stereo RCA output carrying the booth output signal; for connecting a further amplifier e.g. for the monitoring system.
31| REC output| Stereo RCA output for connecting an analog recording unit. The recording level is independent of the position of the master control
32| PC USB port| USB-B port (full-duplex) for connecting a computer.

Can be used simultaneously as an input for digital audio signals for playback via channel 4 and as output of the digital master signal.
The digital master level is independent of the master control.
The digital master signal is constantly available, i.e. it is independent of the input selector.

33| Phono/line inputs| Stereo inputs (RCA) for channel 1-2 for connecting units with line level outputs such as CD players or turntables with magnetic system. Set the adjacent line/phono switch according to the source used.
34| Ground clamping screws| To be used for turntables.

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| Structure| Balanced connection| Unbalanced connection
---|---|---|---
XLR, male
Setup | Setup | red = 2
black = 3
shield = 1| red = 2
shield = 1 + 3
XLR, female
Setup | Setup | red = 2
black = 3
shield = 1| red = 2
shield = 1 + 3
6.3mm jack, stereo
Setup | Setup | red = tip black = ring
shield = sleeve| red = tip
shield = sleeve + ring
6.3 mm jack, mono
Setup | Setup | red = tip black = ring shield = n/c| red = tip
shield = sleeve
RCA
| Setup | red = tip
black =
sleeve shield = n/c| red = tip
shield = sleeve
| | |

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.

Operation

Basic adjustment of the input channels

First set all gain controls, equalizer controls and the crossfader to mid position. Set the assignment selectors to the position “MASTER”.
Use the input selector to select the input to which the audio source is connected.
Feed an audio signal (test signal or music piece) to the channel and advance the channel fader to approx. 2/3 of its maximum. Set all other channel faders to zero.
To monitor the signal via the speaker of a PA system connected, advance the master control to approx. 2/3 of its maximum. The signal can also be monitored via headphones.
Via the LED meter, control the level of the channel with the corresponding gain control. If the red LED of the meter lights up, there is an overload of the channel and the level of the input signal must be reduced.
Repeat the steps for the other connected input channels as described above.

Basic adjustment of the output channels

The LED output meter indicates the level of the signal at the master outputs. Via the output meter, adjust the desired level with the master control. Usually an optimum level control is obtained if the output meter shows values in the 0 to +3 dB range at average volume. However, if the output level at the master outputs is too high for the following unit, the master signal must be controlled to a corresponding lower level.
Adjust the desired signal level for the output BOOTH with the control BOOTH LEVEL.
The digital master signal at the USB port and the recording signal at the recording output REC is taken off ahead of the output control, i.e. it is not affected by the master control.

Crossfading between two channels/mixing the signal sources

Select the two signal sources for crossfading with the two assignment selectors.
Set the faders of the channels not used to zero and control the two channels selected to an optimum level with their faders.
Now crossfading between the two channels selected is possible:
- crossfader moved to the left: fade-in of the channel switched to the left side of the crossfader and fade-out of the channel switched to the right side of the crossfader
- crossfader moved to the right: fade-in of the channel switched to the right side of the crossfader and fade-out of the channel switched to the left side of the crossfader
- For hearing the signals of the two channels at the same level, set the crossfader to mid-position.
For mixing the signals of the other input channels to the music program, advance the corresponding faders accordingly.
The selector switch CURVE allows for adjustment of the crossfading characteristic: Use the left position for sharp crossfading (e.g. for scratching and cutting) and the right position for smooth crossfading (e.g. for long mixes). Do not use this switch while a signal is present as this may cause a sudden change in volume.

Announcements via the DJ microphone

To switch on the DJ microphone set the selector switch to “ON”. The LED indicator lights up.
To improve the audibility of an announcement during the current music program activate the talkover function. Set the selector switch to “TALKOVER”; then during a microphone announcement, the levels of channels 1-4 are automatically attenuated.
Adjust the volume of the microphone announcement with the GAIN control and optimize the sound with the tone controls HIGH and LOW.
To switch off the DJ microphone set the selector switch to “OFF”.

Prefader listening to the channels
The cue function allows monitoring each of the channels 1-4 via headphones even if the corresponding channel is faded out. Thus, it is possible, e. g. to time the moment for fading in an audio source. Alternatively it is also possible to monitor the current music program ahead of the master control.

For prefader listening to a channel, press the corresponding CUE switch (red indicators light up) and set the control CUE MIX to the left stop position. To monitor the current music program ahead of the master control, set the control to the right stop position.
Adjust the desired headphone volume with the control CUE LEVEL.

Operation with a computer
The rear USB port PC allows transmission of digital audio signals in both directions between the mixer and the computer. As soon as the mixer is connected to a computer, it will be recognized as a standard USB audio device and the required drivers are installed.

You can control the mixer using the standard audio interface controls in the Mac and Windows operating system. For data transmission from the mixer to the computer the USB interface of the mixer must be selected as the recording device. For data transmission from the computer to the mixer the USB interface of the mixer must be selected as the playback device. Open your playback/recording software to make the required adjustments for audio playback via the mixer or for audio recording from the mixer.
Set input selector (5) to the PC position to switch the audio signal coming from the computer to input channel 4. In addition, the PC mode must be selected with the MODE button (14) so that the display indicates “PC”.
For recordings with the computer, the USB port sends the digital master signal.

Using the audio player
The audio player allows streaming music from your mobile devices such as smartphones, tablets and notebooks and accepts USB storage devices with MP3, WMA and WAV files.

To use the audio player, set the input selector for channel 4 to the right position.
For Bluetooth operation select Bluetooth mode with the MODE button. The display shows the symbol at the top left and the device enters pairing mode. Now the display indicates “Connecting….”.
Activate the Bluetooth function at the Bluetooth source and start the device scan. Select “PM-444Pi“ from the list and connect the devices.
Now play music at the Bluetooth source as you normally would and use the control elements of channel 4 to mix the audio player’s signal to the master signal.
For USB operation insert a USB drive into the USB port and select USB mode with the MODE button.
The USB device is selected as the playback medium and read in. The display shows various information.
If a data carrier is not recognized at the first try, remove it and insert it again. Now use the PLAY/ STOP and / buttons for playback control.

Cleaning and Maintenance

Disconnect from mains before starting maintenance operation! We recommend a frequent cleaning of the device. Please use a soft lint-free and moistened cloth. Never use alcohol or solvents!

There are no serviceable parts inside the device except for the fuse. Maintenance and service operations are only to be carried out by authorized dealers.

Should you need any spare parts, please use genuine parts. If the power supply cable of this device becomes damaged, it has to be replaced by a special power supply cable available at your dealer.

Should you have further questions, please contact your dealer.

Technical Specifications

PM-444Pi

Specifications are subject to change without notice due to product improvements.

Omnitronic is a brand of Steinigke Showtechnic GmbH
Andreas-Bauer-Str. 5
97297 Waldbüttelbrunn Germany
D00140052 Version 1.0 Publ.
03/06/2022

WWW.OMNOTRONIC.DE

www.omnitronic.de

For product updates, documentation, software and support please visit www.omnitronic.de. You can find the latest version of this user manual in the product’s download section.

© 2022 OMNITRONIC. All rights reserved.
No part of this document may be reproduced in any form without the written permission of the copyright owner. The contents of this document are subject to revision without notice due to continued progress in methodology, design, and manufacturing.

All trademarks mentioned herein are the property of their respective owners.

D00140052, Version 1.0, Stand 03/06/2022

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