OMNITRONIC RM-1422FXA Rack Power Mixer User Manual
- June 15, 2024
- OMNITRONIC
Table of Contents
OMNITRONIC RM-1422FXA Rack Power Mixer
Introduction
- Welcome to Omnitronic! Thank you for choosing one of our products.
- This user manual will show you how to install and operate the audio 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.
- This user manual is valid for item number: 10040302. Please save this document for future needs and pass it on to further owners.
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!
HEALTH HAZARD!
- By operating speaker systems with an amplifier, you can produce excessive sound pressure levels that may lead to permanent hearing loss.
- This PA system 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 I. The power plug must only be
plugged into a protection class I outlet. 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.
- The occupation of the connection cables is as follows:
- The earth has to be connected! If the device will be directly connected with the local power supply network, a disconnection switch with a minimum opening of 3 mm at every pole has to be included in the permanent electrical installation. The device must only be connected with an electric installation carried out in compliance with the IEC standards. The electric installation must be equipped with a Residual Current Device.
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 short-circuits caused by metal parts
may cause mortal injuries.
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.
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!
- Never install the amplifier next to highly sensitive devices like pre-amplifiers or tape decks, as the strong magnetic field of the amplifier can produce hum in these devices. The magnetic field is strongest directly above or below the amplifier. If a rack is used, the amplifier should be installed at the bottom and the highly sensitive devices at the top.
Commercial Use
• Operating an amplification system in public or industrial areas, a series of
safety instructions have to be followed. The operator must therefore inform
himself on the current safety instructions and consider them.
Setup
- 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!
- Before the unit is switched on all faders and volume controls have to be set to zero or minimum position. Turn the amplifier on last and off first! Only connect the device when the power switch is off. Never connect output to output. Never connect the inputs or outputs to any power source (batteries, etc.)
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
- Never remove the serial barcode from the device as this would make the guarantee void.
- 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.
Batteries
Do not try to short-circuit, recharge, disassemble or heat batteries (danger
of explosion!). Remove the batteries if the device is not used for a longer
period of time. Damaged/leaking batteries may cause harm to your skin–use
safety gloves.
Intended use
This audio mixer with integrated stereo poweramplifier is suited for various
PA and recording applications.
Operating Elements and Connections
-
MIC input
Each mono input channel offers a balanced microphone input via the XLR connector and also features switchable +48 V phantom power supply for condenser microphones. -
LINE IN input
Each mono input also has a balanced line input on a 6.3 mm jack for connecting audio units with line level (e.g. musical instrument). It has 20 dB less gain than the MIC input and does not have phantom power available. You can use either the MIC input or the line input of a channel, but not both at the same time. -
INSERT jack
Insert points enable the processing of a signal with dynamic processors or equalizers. They are sourced post-fader, pre-EQ and pre-aux send. -
LINE L/R input
Each stereo channel has two balanced line level inputs on 6.3 mm jacks for left and right channels. If only the left jack (marked “L”) is used, the channel operates in mono. -
GAIN control
Use the gain control to adjust the input gain for the microphone and line inputs. The scale in the mono input channels has two value ranges: +10 to +60 dB refers to the MIC input and shows the amplification for the signals fed in there. +10 to -40 dBu refers to the line input and shows its sensitivity. The control range for the stereo input channels is +20 to -20 dBu. -
CLIP LED
This LED serves as overload indication. If it lights up permanently, reduce the input amplification (turn back the gain control and/or turn back the tone controls). -
2-band equalizer
All input channels have a 2-band equalizer which provides boost or cut of up to 15 dB. In the central position, the equalizer is off (flat). The upper (HIGH) and the lower (LOW) bands are shelving filters that increase or decrease all frequencies above or below their cut-off frequency. The cutoff frequencies of the upper and lower bands are 12 kHz and 80 Hz respectively. -
Channel fader
The channel fader determines the channel’s volume in the main mix. The optimum setting is the 0 (unity gain) position. -
MON control
This control adjusts the level of the channel signal sent to the MON output. The signal is taken after the channel level control but after the channel EQ. -
FX control
This control adjusts the level of the channel signal sent to the FX output for effects processing. The signal is taken after the channel level control. -
PAN/BAL control
The panorama control in the mono channel places the mono signal in the stereo sound. The signal level remains constant. On stereo channels, the balance control adjusts the balance left/right for the stereo signal. -
Routing buttons
These buttons select the input signals for channel 9/10 or 11/12. [9/10 / USB]: button released = signal of the line input 9/10 (4), button depressed = signal of the USB port). [11/12 / MP3]: button released = signal of the line input 11/12 (4), button depressed = signal of the MP3 player). -
Digital effects processor
This built-in effects module produces high-grade standard effects such as reverb, chorus, flanger, delay and various combination effects. Use the PROGRAM control to select an effect preset. The effect selected is indicated in the display. -
POWER LED
The power indicator lights up when the unit is turned on. -
+48 V LED
Lights up with activated phantom power. -
Level indication
Dual 4-segment LED arrays are provided to monitor the level of the main left/right output. -
FX control
This control adjusts the level of the built-in effects module sent to the master channel. -
+48V button
The PHANTOM switch activates the phantom power (necessary to operate condenser microphones) on the XLR sockets of the mono channels. The red +48 V LED illuminates when phantom power is on. As a rule, microphones with unbalanced output cannot be used with phantom power as they may be damaged. -
TAPE TO MASTER button
When this switch is depressed, the 2-TR input is routed to the master channel and thus serves as an additional input for signal sources that do not require any further processing. -
TAPE TO PHONES button
- This button routes the signal at the 2-TR input to the headphones jack.
- Thus, the recording signal can be monitored via headphones or a monitoring system.
-
MASTER control
Level control for the master signal. The master signal is sent via the jacks MAIN OUT, 2-TR OUT and the USB jack. -
PHONES/CTRL RM control
Level control for the monitoring outputs PHONES and CTRL RM. -
PHONES jack
6.3 mm jack for connecting stereo headphones. The output level is adjusted by the PHONES/CTRL RM control. -
Memory card slot
Allows playback of audio files from an SD (HC) card. -
Audio player operating buttons
- [MODE]: Switches between USB device and SD card operation.
- [PLAY/PAUSE]: Switches between play and pause.
- [FOLDER]: For selecting folders.
- [REPEAT]: For selecting random play and repeat functions.
- [PREV] and [NEXT]: For title selection (short actuation) and fast forward/reverse (long actuation).
-
USB port
Allows playback of audio files from a USB storage device. -
Speaker terminals
Speaker jacks for connecting speaker systems (min. 4 Ω). -
MAIN OUT output
- The MAIN outputs carry the master signal and are on balanced XLR jacks.
- The output level is set by the MASTER control.
-
CTRL OUT output
- The control room output (unbalanced 6.3 mm jacks) is normally connected to the monitoring system in the control room and carries the master signal.
- The output level is adjusted by the PHONES/CTRL RM control.
-
Power input with fuse holder
Used to plug in the supplied power cable. Only replace the fuse when the device is disconnected from mains. Only use fuses of the same rating and power. The correct fuse value is specified on the rear panel. -
Power switch
Use the POWER switch to turn on the mixing console. The POWER switch should always be in the “Off” position when you are about to connect your unit to the mains. Turns the unit on and off. -
USB port
The mixer has built-in USB connectivity, allowing stereo signals to be sent to and from the mixer and a computer. Connect a USB type B plug into the USB jack on the mixer, and the other end into a free USB port on your computer. The audio sent from the mixer to a computer is identical to the master output. Audio being sent to the mixer from a computer can be routed to stereo input channel 9/10 with the [9/10/USB] (12) button. -
2-TR input/output
- The 2-TR IN input accepts stereo line signals of external sources (e.g. DAT recorder or CD player for background music). The input can be used as additional stereo input by pressing the TAPE TO MASTER (19) button.
- The 2-TR OUT output is wired in parallel to the MAIN OUT and carries the master signal (unbalanced). Connect this to the inputs of your recording device or amplifier.
-
AUX SEND jacks
The FX jack routes the signal, which was set by the FX controls in the individual channels, to an external effects processor. The AUX RETURN jacks accept the effects mix return. The MON output is used to set up the monitor mix from the channels and routed to an amplifier for the musicians to monitor. Both outputs are on unbalanced 6.3 mm jacks. -
AUX RETURN jacks
These jacks generally serve as the return for the effects mix by connecting the output of an external effects device. If only the left jack is connected, the AUX RETURN is automatically switched to mono. The stereo aux returns are balanced, but can of course also be used with unbalanced connectors.
Setup
Rack installation
Install the unit on a plane surface or in your rack. For 19″ (483 mm) rack
installation, 3 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 console 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 channel fader and output controls to
minimum prior to connecting and disconnecting equipment. Be sure to use only
high-grade cables. The illustrations below show the wiring of these cables.
Speaker connection
For connecting speakers, Speaker jacks are provided. Turn each plug to the
right until it locks into place. For unlocking, pull the unlock button and
turn the plug to the left. The impedance of the speakers connected must not
fall below 4 Ω at any output. The pin configuration is as follows:
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. Then turn up the volume
control on your sources (if provided) and set the output volume of the mixer
to a low level. Make adjustments to all volume settings as needed. For
switching off, follow the inverse sequence: always switch off the mixer first
and then the audio sources
Caution!
- If the phantom power is switched on, no microphones with unbalanced output must be connected. Otherwise these microphones may be damaged. During the stabilization phase (approx. 1 minute), you must not change any connection.
- To prevent switching noise, only actuate the button +48V when the mixer is switched off or when all output controls are set to minimum.
Basic settings
For even sound, every input channel should be adjusted to the same level. For
monitoring, connect the mixer to headphones or a speaker system and set the
output controls to mid-position. To control a channel, feed an audio signal
(test signal or music) to the respective input channel and advance the channel
fader to position 0. Adjust the gain control so that the level indication
lights up in the 0 dB range. Using the GAIN control, drive the signal to the
0-dB mark. This way you have a vast amount of drive headroom for use with very
dynamic signals. The CLIP display should light up only rarely, preferably
never. While fine-tuning, the equalizer should be set to neutral.
Operation with a computer
- The USB port 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.
- Depress the routing switch [9/10/USB] (12) to switch the audio signal coming from the computer to stereo input channel 9/10. With the selector switch 2-TR/USB it can monitored via headphones and a monitor system. For recordings with the computer, the USB port sends the digital master signal.
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.
Digital effects processor
The built-in stereo effects processor produces high-grade standard effects
such as reverb, chorus, flanger, delay and various combination effects. The
built-in effects module has the advantage that it does not need to be wired
up. This excludes the danger of humming or level mismatch right from the start
and thus considerably facilitates use. See the table below for description.
Use the PROGRAM control to select an effect preset. The effect selected is
indicated in the display. Use the FX (17) control to adjust the level of the
effects module sent to the master channel.
- Reverb Hall 3sec
- Reverb Hall 5sec
- Reverb Room 1sec
- Reverb Room 2sec
- Reverb Plate 1sec
- Reverb Plate 2sec
- Echo 43% 100msec
- Echo 43% 200msec
- Echo 43% 300msec
- Echo 58% 100msec
- Echo 58% 200msec
- Echo 58% 300msec
- Chorus & Reverb 0.6Hz/2sec
- Flanger & Reverb 0.6Hz/2sec
- Chorus 0.6Hz
- Flanger 0.6Hz
Note
If the effect processor is used, the AUX RETURN input must not be reserved because the left output and the right output respectively of the effect processor are muted when connecting both jacks.
Audio player
The amplifier features an audio player for MP3 files from USB storage devices
and SD cards as well as wireless music streaming from your Bluetooth devices
such as smartphones, tablets and notebooks. Use the “MODE” button to select
the desired signal source. The audio player can either be operated via the
buttons on the front panel or via the remote control. The level is adjusted
with channel 11/12.
Setting up a Bluetooth connection with mobile devices
Press the “MODE” button (repeatedly) until the display indicates “Bluetooth”.
The audio player will enter the pairing mode. Now activate the Bluetooth
function at the Bluetooth source and start the device scan. Select
“OMNITRONIC” from the list and connect the devices. Then play music at the
Bluetooth source as you normally would and the sound will come out of the
speakers. You can operate the Bluetooth source with the remote control, too.
Remote control
Before first operation, pull out the insulating foil on the back. To change the battery, press the small latch with the notch to the right and pull out the battery holder. Insert a button cell type CR2025 into the holder with the positive pole facing upwards. Remove the battery when not in use for a longer period of time.
Technical Specifications
- Power supply : 100-240 V AC, 50/60 Hz
- Power consumption: 115 W 1/8 power
- Output power:
- 2 x 250 W RMS (8 ohms)
- 2 x 400 W RMS (4 ohms)
- Inputs:
- Mic, mono XLR bal.
- Line, mono 6.3 mm jack bal.
- Channel Insert 6.3 mm jack unbal.
- Aux Return, stereo 6.3 mm jack L/R bal.
- Line, stereo 6.3 mm jack L/R bal.
- Tape RCA L/R
- Outputs:
- Main Out XLR L/R bal.
- Control Room Out 6.3 mm jack L/R unbal.
- Aux Send 6.3 mm jack unbal.
- Tape RCA L/R
- Headphones 6.3 mm jack unbal.
- Headphones impedance : >8 ohms
- USB port : 1.1, type B
- Speakers: Speaker mounting socket
- Frequency range: 20-20000 kHz
- Frequency range: 20-20000 kHz
- Distortion: 0.05 %
- S/N ratio : 89 dB
- Tone control/channel:
- Treble: ±15 dB at 12 kHz
- Bass: ±15 dB at 80 Hz
- Dimensions (WxDxH): 483 x 133 x 34 mm
- Weight: 6.5 kg
Protecting the Environment
Disposal of old equipment
- 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.
- You as the end user are required by law (Battery Ordinance) to return all used batteries/rechargeable batteries. Disposing of them in the household waste is prohibited. You may return your used batteries free of charge to collection points in your municipality and anywhere where batteries/ rechargeable batteries are sold. By disposing of used devices and batteries correctly, you contribute to the protection of the environment.
References
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