Fohhn Airea AM-4.4 User manual

Operation manual
Airea
AM-4.4
Before using the device, please read the operation manual carefully and keep it at
hand.

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Content
1. Introduction and information........................................................................................................... 4
1.1 Important safety requirements................................................................................................. 4
1.1.1 Definition of terms............................................................................................................... 4
1.1.2 General safety information................................................................................................ 4
1.1.3 Electrical safety instructions.............................................................................................. 5
1.1.4 Acoustic safety instructions............................................................................................... 6
1.1.5 Connections and cables .................................................................................................... 6
1.2 Operating conditions.................................................................................................................. 7
1.2.1 Information about irregular operation .............................................................................. 7
1.3 Storage and transport................................................................................................................ 7
2. The product....................................................................................................................................... 8
2.1 Product description.................................................................................................................... 8
2.2 Scope of delivery........................................................................................................................ 9
2.3 Unpacking................................................................................................................................... 9
3. Installation....................................................................................................................................... 10
3.1 Professional rack assembly.................................................................................................... 10
3.2 Connections and control elements........................................................................................ 11
3.2.1 Standard connections ...................................................................................................... 11
3.2.2 Optional connection versions.......................................................................................... 12
3.2.3 Status displays.................................................................................................................. 12
3.2.4 USB-C configuration port................................................................................................. 13
3.2.5 Analogue inputs................................................................................................................ 14
3.2.6 Airea-Net outputs.............................................................................................................. 14
3.2.7 Airea-Net input.................................................................................................................. 15
3.3 Start-up...................................................................................................................................... 15
3.3.1 System requirements....................................................................................................... 15
3.3.2 Download and installation of Fohhn Audio Soft........................................................... 16
3.3.3 Fohhn-Net wiring and ID allocation................................................................................ 16
3.3.4 Updating the firmware...................................................................................................... 18
3.3.5 Setting up and connecting an Airea system................................................................. 19
3.3.6 Signal processing ............................................................................................................. 20
3.3.7 Integration in a Dante™ network.................................................................................... 20
3.3.8 Renaming a device and output channels...................................................................... 22

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3.4 Additional functions.................................................................................................................. 23
3.4.1 Switch contact................................................................................................................... 23
3.4.2 Password lock................................................................................................................... 24
4. Technical data................................................................................................................................. 25
4.1 Power supply............................................................................................................................ 27
5. Troubleshooting.............................................................................................................................. 28
6. Service and repair.......................................................................................................................... 29
6.1 Maintenance measures........................................................................................................... 29
7. Connection configuration.............................................................................................................. 29
7.1 Airea-Net................................................................................................................................... 29
7.2 Fohhn-Net................................................................................................................................. 30
7.3 Airea-Net cabling permanent installation.............................................................................. 30
8. Appendix.......................................................................................................................................... 31
8.1 Environmental notice............................................................................................................... 31
8.2 CE marking and declaration of conformity........................................................................... 31
8.3 Trademark................................................................................................................................. 31
8.4 Protection classes and protection types............................................................................... 31
8.5 Disclaimer and copyright......................................................................................................... 32
8.6 Contact address....................................................................................................................... 32

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1. Introduction and information
Congratulations on the purchase of your Fohhn Airea system. These days, customers
demand sound quality and versatility more than ever. In response to the growing trend
towards compact, lighter and higher performance active systems, we developed and then
realised the Fohhn Airea System. This should make working at your events and starting up
fixed installations as easy as possible. The new versatile options for integrated Fohhn Audio
DSPs provide you with many convenient advantages in day-to-day operation.
All the DSP functions in the Airea Master AM-4.4 can be controlled via one single software,
Fohhn Audio Soft.
To make the most of all the benefits of your Airea Master and ensure error-free
operation, please read the operation manual provided carefully before operation and
always keep it at hand!
1.1 Important safety requirements
Read through all of the following safety requirements before operating the device. Keep
these instructions near the device at all times. Reading the operation manual is no substitute
for knowledge of and adherence to all local safety requirements and guidelines valid at the
time and observance of the safe working methods on site.
All the information and technical specifications published here are based on data available at
the time of publication. We expressly reserve the right to make changes to this information.
1.1.1 Definition of terms
Danger
This signal word describes a hazardous situation with a high level of risk, which will result in
death or serious injury if not heeded.
Warning
This signal word describes a hazardous situation with a medium level of risk, which will result
in death or serious injury if not heeded.
Caution
This signal word describes a hazardous situation with a low level of risk, which will result in
minor or moderate injury if not heeded.
1.1.2 General safety information
Danger:
To avoid danger to life, ensure that all persons involved in the set-up, operation and
dismantling of a system like this have read and understood the operating instructions.

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At the same time, the information presented here is to be regarded as accompanying advice
and does not affect the user’s responsibility to ensure safe operation of the Fohhn system
on site.
Warning:
To avoid injury,
the device must be stored, installed and operated in a manner that prevents access
to children.
To avoid injury, this device must be decommissioned, labelled and secured against
accidental use, if
there is visible damage,
it is assumed that there are loose parts,
it no longer works correctly,
it has been subject to unfavourable conditions over a long period of time (e.g. wet
conditions)
it has been exposed to poor transport conditions (e.g. in unsuitable packing or wet
conditions).
If required, please contact your Fohhn dealer and the carrier immediately. Contact
details can be found in the appendix to this operation manual.
1.1.3 Electrical safety instructions
Fohhn Airea Master are devices of protection class 1. They are constructed and tested in
accordance with VDE protection measures for electronic devices and leave our factory in
safe, perfect condition. The devices meet all current valid standards in the EMC Act. The CE
marking on the device is confirmation of this.
The relevant standards can be found in the appendix of this operation manual!
Warning:
To minimise the risk of electric shock,
the protective earthing conductor on the mains plug should never be separated and
under no circumstances should the plug be taped.
the device is only to be connected to a mains plug checked by a specialist.
the device casing is never to be opened. The device does not contain any
components that can be repaired by the user. In the unlikely event of a defect, please
contact qualified servicing personnel and/or the dealer from whom the system was
purchased!
Ensure that the local voltage corresponds to the power supply voltage stated on the device.
To minimise the risk of electric shock or fire,
the device should not be exposed to moisture.
no objects filled with liquid (e.g. drinks containers) should be placed on the device.
ventilation openings are not to be covered with objects (e.g. rain protection film).

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the device should not be exposed to excessive heat, direct sunlight, fire or similar.
the device should not be placed near sources of fire (e.g. pyrotechnics).
Caution:
To avoid damage to the device,
the mains cable should not be plugged in if the device is not used for a long period of
time. (Pull out the plug to completely cut off the device from the mains)
1.1.4 Acoustic safety instructions
Fohhn speaker systems can generate very high acoustic pressure levels, which may cause
irreparable hearing damage.
Warning:
To avoid hearing damage,
never stand in the immediate area (1 metre or less) of a device that is ready for
operation.
To avoid hearing damage and damage to the device while in operation, avoid:
acoustic feedback
high-power, sustained distorted signals
Momentary noises that arise when the device is switched on or off, connected or
detached from the system
1.1.5 Connections and cables
Please note the following instructions for your system's cabling:
Ensure that your cables are working perfectly and only use cables with a sufficiently
large diameter.
Only use cables and plugs which correspond to professional standards.
Only use properly shielded cables and plugs for audio and data connections.
Only use mains cables that have intact earth contact connections and ensure that the
mains plug for the device is accessible at all times, so the device can be quickly
disconnected from the network in the event of malfunction.
Lay and affix the cable in such a way that it will not be damaged by tools or jammed
by the device or a wall bracket.
Protect all laid cables from mechanical damage or tensile forces.
Avoid tightening torques that are too high when screwing connection terminals!
Loudspeakers should only be wired by expert personnel!
Important: For communication between a Windows PC with the installed control software
Fohhn Audio Soft and the Airea Master, a Fohhn network adapter (e.g. NA-11 Fohhn-Net
USB Adapter or NA-4 Fohhn-Net Ethernet Adapter) is recommended.
For safe control, using an NA-4 is recommended for each Airea Master. Further
information on this can be found in Chapter 3 of this operation manual!

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1.2 Operating conditions
Please note the following information when operating your system:
The permissible ambient temperature of the device during operation is from 0 °C to
+40 °C.
The device is to be used in a dry area with normal dust and moisture levels in the air.
If condensation has built up during transport or storage of the device or its back
panel, leave the device to acclimatise for around 2 hours before operating.
Never expose the device to aggressive chemical liquids or vapours.
Always ensure that heat dissipation is assured via the exterior surface of the casing.
Always ensure that the device is well ventilated. To ensure sufficient cooling, the
device should not be covered by towels. Heating of the casing by sunlight or strong
lamps is to be avoided.
Never expose the device to considerable vibrations.
1.2.1 Information about irregular operation
If the permissible operating temperature becomes too high (higher than 75 °C), the device
switches off. As soon as the temperature returns to the normal operating range, the device
automatically switches on again.
The temperature of the Fohhn system is shown in the Fohhn Audio Soft. The device
switches off if it is exposed to direct sunlight or very high ambient temperatures. Reliable
operation is only guaranteed when adhering to the permissible ambient temperatures.
The device is to be checked by a service provider approved by Fohhn Audio AG if
the network cable or mains socket are damaged,
a foreign body or liquid has got inside the device,
the device has been exposed to rain,
the device is not working normally or is exhibiting significant changes in performance,
the device is damaged (e.g. after a fall).
1.3 Storage and transport
Please observe the following information:
The device may only be transported in the original packaging.
Store the device in dry surroundings and at a consistent ambient temperature to
avoid condensation.
The permissible ambient temperature for the device during storage is from -10 °C to
+70 °C.
During transport and storage, water condensation can form due to temperature
fluctuations and settle on the surface of the device. For that reason, inspect the
surface for moisture before commissioning. If this is the case, let the unpacked device
acclimatise to the ambient temperature for at least two hours.

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2. The product
2.1 Product description
The Airea System is a freely configurable, active loudspeaker concept as well as a versatile,
digital audio network system. Airea was designed to realise high-quality, flexible, future-proof
sound reinforcement applications. The Airea system comprises state-of-the-art loudspeakers
with integrated, digital power amplifiers and Fohhn Audio DSP as well as a master module
with digital and analogue inputs and digital Airea-Net outputs, along with the integrated
Fohhn Audio DSP Matrix.
Cabling is very straightforward with conventional network cables.
The signal path throughout the Airea System is completely digital. This means that there is
no loss of quality through AD/DA conversion or loss of performance.
The Airea Master Module AM-4.4 is the central unit of the Airea system. It provides the
supply voltage, the digital audio signals and the control signals for the connected active Airea
DSP speakers.
Up to 16 active DSP loudspeakers can be linked to one Airea Master AM-4.4.
With Fohhn Audio Soft, each of these DSP loudspeakers can be individually controlled and
adapted in terms of routing, volume and sound. With only the Fohhn Audio Soft control
software, you have access to all the DSP functions and presets. (The latest version of the
software is available for download free of charge at www.fohhn.com.)
With wiring using just one cable, Airea is clearly superior to conventional active systems. In
addition to the option to link several loudspeakers in a daisy-chain, even distances of up to
100 m can be effortlessly bridged –and each loudspeaker can be individually configured with
regard to acoustics, run time (delay) and dynamics.
With digital Dante signal inputs AM-4.4 DAN and 4 analogue mic/line inputs AM-4.4 ANA,
the Airea Masterextrem is versatile and ready for the future.
The fans in the Airea Masters AM-4.4 are temperature-controlled and optimised to ensure
very quiet operation. The fans do not operate when in standby.
An integrated inrush current limiter means it is possible for several linked Airea Masters to be
switched on at the same time within one rack. For larger installations with several systems,
this function eases handling significantly.
The Airea Master AM-4.4 is also equipped with two programmable switch contacts (switch)
for remote control and easy integration into the building technology.

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Definitions of terms
Airea System
An Airea System comprises one or several Airea Masters along with one or several active
Airea loudspeakers.
Airea Master
The Airea Master is the central unit of the Airea System
Airea end device
An Airea end device is linked to and powered by an Airea Master
AES/EBU
Protocol for transferring digital audio data
Airea-Net
Network for transferring power supply voltage, Digital Audio (AES/EBU) and Fohhn-Net
control signals via a network cable.
Fohhn-Net
Network for transferring control signals for Fohhn Audio devices
2.2 Scope of delivery
Each product is inspected to the highest quality and safety standards before it ships out.
Please inspect your product carefully for any damage that may have occurred during transit.
In the event of damage, inform your dealer and the carrier immediately. Please check
whether the packaging contains all the components included with the device.
Includedin the scope of delivery of your Fohhn system are:
•1 × Airea Master AM-4.4
•all plugs for connections on the rear side (plugged in)
•1 × Network cable with cold-device connection socket
•1 × Quick start instructions
•2 x Rack brackets
2.3 Unpacking
When unpacking the system, we recommend proceeding as follows:
1. Open the packaging and remove the product.
2. Check the product for any visible transport damage.
Should the product have any damage, please report this immediately to the carrier.
Transport damage can only be claimed by the recipient (i.e. you). Keep the packaging
for assessment by the carrier.
3. Generally speaking, the packaging should be kept. Send the product in suitable re-
packaging or in a suitable carry bag.

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3. Installation
3.1 Professional rack assembly
For correct assembly in mobile 19-inch racks or switching cabinets, the device is equipped
with the relevant mounting brackets for the front and rear (optional). The casing is designed
to be distortion-resistant. Please ensure that the Airea Master is sufficiently ventilated and
cooled on all sides during operation. There must be a space of at least 1 RU at the top and
bottom between rack-mounted amplifiers and Airea Masters.
Included in the scope of delivery for each device are two mounting brackets (mounting
bracket set).
To install two Fohhn 9.5” devices next to one another in a 19” rack, an optional 19” rack
connector is available, Item 8022-00000.
To install an MA-Series amplifier in a 19” rack, a 19” installation angle with 6 holes for
connectors in the Neutrik D Series is available as an option. Fohhn Item 8023-00000.

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3.2 Connections and control elements
Cables should only be connected when the device is switched off. Before switching on the
Airea Master, the mixing console should be switched on too. This will prevent any
unpleasant, and often dangerous, power-on noise.
3.2.1 Standard connections
On the rear of the casing, the Airea Master AM-4.4 has the following connections as
standard:
AM-4.4 rear
(1) Mains
The supplied IEC mains cable is connected to this socket.
The Airea Master is only completely separated from the network when the mains plug
is pulled out!
(2) Airea input
A Fohhn Airea signal is fed to this network socket.
(3) Switch
These connecting terminals are switching contacts for switching presets. These can be
configured in Fohhn Audio Soft (see section 3.4.1 ‘Switching contact’).
(4) Analogue input CH 1/2/3/4
Analogue audio signals can be fed in via these connecting terminals.
(5) Airea output CH 1/2/3/4
The Airea loudspeaker system is connected to this RJ-45 connector via network cables.
(6) Fohhn-Net input
The Airea Master can be connected to the remote network Fohhn-Net via these connecting
terminals.
Only use Fohhn network adapters (NA-11 Fohhn-Net USB Adapter or NA-4 Fohhn-Net
Ethernet Adapter)for this.
1
1
1
3
1
2
1
4
1
5
1
6

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3.2.2 Optional connection versions
The Airea Master AM-4.4 is available with input interfaces for the digital audio network
Dante™ or for 4 x analogue audio signals.
Input option Dante interface
(4) Dante
Via this RJ-45 input, signals are fed in using the Dante digital audio interface.
3.2.3 Status displays
On the Airea Master AM-4.4, the status displays are shown via the illuminated symbols on
the front of the casing:
Status LEDs for the Airea Master on the front side
USB config (gear wheel symbol)
This symbol lights up when the Airea Master is connected via a USB-C connector to the
control computer.
protect
This symbol lights up if there is an error during operation.
ready
This symbol lights up when the Airea Master is ready to use.
The Airea Master also has two LEDs on the rear of the casing:
1
1
1
3
1
2
1
5
1
6
1
4

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Status LEDs Airea Master AM-4.4 on the rear side
receive
This symbol lights up when the Airea Master receives control signals from Fohhn-Net.
send
This symbol lights up when control signals from Fohhn-Net are displayed.
The 4 Airea-Net connectors each have a green and a yellow status LED. Green shows that
the Airea-Net output is switched on. The yellow LED flashes when the output is being
checked and a solid yellow LED denotes a short circuit in the output.
3.2.4 USB-C configuration port
The Airea Master AM-4.4 is equipped with a USB-C connector on the front of the casing.
This enables optional, direct configuration of the AM-4.4 via a PC and the control software
Fohhn Audio Soft, without the use of a Fohhn network adapter.
In order to connect a network consisting of several devices, a Fohhn network adapter must
be used (e.g. an NA-11 Fohhn-Net USB Adapter or NA-4 Fohhn-Net Ethernet Adapter).
More information on the configuration can be found in section 3.3 ‘Start-up’ in this
operation manual!
USB-C connector (bottom left) on the front of the casing

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3.2.5 Analogue inputs
The AM-4.4 ANA has 4 symmetrical analogue inputs. These inputs can be used as line
inputs or as microphone inputs. In Fohhn Audio Soft, amplification and optional phantom
power for condenser microphones can be set individually for each analogue input. These
settings will stored in presets.
3.2.6 Airea-Net outputs
Airea end devices are connected to Airea-Net outputs, e.g. active Airea loudspeakers,
breakout boxes and Airea amplifiers. The connections are provided with 48V supply
voltage, a digital audio signal and the Fohhn–Net control signal. As a result, only one
cable is necessary to operate the Airea loudspeaker.
Active Airea loudspeakers have an Airea-Net input and an Airea-Net output, so several
Airea loudspeakers can be connected serially (daisy-chain) to an Airea-Net output.
Since the AES/EBU digital audio data is refreshed in each receiver, it is imperative that an
Airea-Net output is only connected to one Airea-Net input, otherwise the audio data will not
be received and will not be transmitted.
Devices with a total of 200W RMS can be connected to each Airea Net output. The required
connected load is printed on each Airea end device.
The sum of all connected loads should not exceed 200W per Airea-Net output.
When the Airea Master is switched on, all Airea-Net outputs are disconnected. There is no
supply voltage. This is shown by the yellow LED (16).
Before an Airea-Net output is switched on, an internal logic checks to see if the end device is
connected, if there is a short circuit, or whether there are too many Airea end devices
connected. The 48 V phantom power is only switched on if a suitable connection is detected.
This measurement process can take up to 2 seconds.
During operation, the Airea-Net output is continually monitored for overload and short circuit.
If an error occurs, the Airea-Net output will be switched off.
An active Airea-Net output is shown by a green LED (17).
If an Airea-Net output is switched off or if there is an error, the yellow LED will be illuminated
(16). Permanent illumination of the yellow LED indicates short circuit.
If nothing is connected to an Airea-Net output, it will also not be switched on and the yellow
LED (16) will flash.
Since large currents flow to the Airea-Net outputs, the wiring should only be changed
when the Airea Master is switched off.
Connecting Airea end devices to an active Airea-Net output can cause damage to
connectors and cables due to high currents.
The connection assignments for the Airea-Net connectors are outlined in the appendix.

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3.2.7 Airea-Net input
The Airea Master AM-4.4 is equipped with an Airea-Net input connector. This provides the
option of connecting the external Airea Adapter ABX-2, ABX-4 or ABX-6 to your Airea
Master. The Airea system has its own network for transferring supply voltage, digital audio
signals (AES/EBU) and Fohhn-Net control signals –Airea-Net. The AES/EBU signals are
allocated to input channels 3 and 4.
3.3 Start-up
You can remotely control and monitor the functions of the digital signal processors (DSP)
integrated in your Airea Master via the Fohhn-Net network. To do this, a Windows PC with
the control software Fohhn Audio Soft (Version 5.6.0 or later) installed is required.
To configure the devices connected to the AM-4.4, an NA-11 Fohhn-Net USB adapter or
NA-4 Fohhn-Net Ethernet adapter must be connected to the Fohhn-Net terminal.
•An external Fohhn-Net adapter is required to configure the entire Airea System!
•Use a separate Fohhn-Net adapter for each AM-4.4!
•Only the AM-4.4 can be configured via the USB connector for the AM-4.4!
•The Ethernet connector for the AM-4.4 DAN is only for Dante Audio!
3.3.1 System requirements
A standard Windows PC is required to operate Fohhn Audio Soft.
More information can be found in the separate operation manual for Fohhn Audio Soft.
These can be downloaded from the Fohhn website: www.fohhn.com

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3.3.2 Download and installation of Fohhn Audio Soft
Fohhn Audio Soft is directly compatible with all active DSP systems for Fohhn. Therefore,
you do not need a version of the software specifically designed for the Airea Master, but
always work with the same software and in the same user interface, regardless of the
connected devices.
You can download the latest version of Fohhn Audio Soft from www.fohhn.com free of
charge.
Proceed as follows to install Fohhn Audio Soft on your computer:
1. Download the latest version of Fohhn Audio Soft to your computer.
2. Find the file Fohhn_Audio_Soft_X.X.X_Setup.exe on your computer (X.X.X is the
respective version number).
3. Execute the installation programme by double-clicking on the file, then follow the
instructions on screen.
4. Click on Install to install the programme on your computer. Confirm the dialogue for User
account control, if this is displayed.
5. To complete the installation, click on Finish.
The software is ready to use right after installation and can be activated either via the
programme symbol on the desktop or via the path, Start > All programmes > Fohhn Audio
AG > Fohhn Audio Soft.
3.3.3 Fohhn-Net wiring and ID allocation
To control several units, each unit in the Fohhn-Net must be provided with its own, specific
ID. Via this ID, each individual Fohhn device can be clearly identified and controlled in
Fohhn Audio Soft.
From factory, all devices have ID 1.
Duplicate IDs will result in an ID conflict. In this case, control of the devices in
question will no longer be possible.
Allocating IDs for individual devices:
For an ID to be assigned, each Airea Master AM-4.4 must be connected to Fohhn Audio
Soft.
Proceed as follows:
1. Connect Airea Master to the power supply.
2. Connect Airea Master via a USB-C connector to a PC.
3. As an alternative to step 2, you can also use an NA-4 or NA-11 Fohhn-Net adapter.
4. Connect the USB connector or adapter via a suitable cable to the Airea Master.

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5. Switch on the Airea Master or connect the network cable to the power supply.
6. Start Fohhn Audio Soft. The Fohhn-Net adapter used will automatically be
recognised.
7. When Fohhn Audio Soft is opened, an automatic search starts which lists the
correctly connected Fohhn devices. Active Airea DSP loudspeakers that are
connected to the Airea Master via Airea-Net are listed automatically. All these
loudspeakers must have different, unique IDs too.
If no device is displayed, check all connections and start the search again. Pay attention to
the ID search range.
Proceed as follows:
1. In the menu point Devices, click in the dialogue Search for devices in the network.
2. If there is still no device shown, check the power supply and/or the network cabling
for your Airea Master. Then repeat step 1.
If an Airea Master is detected, this will appear with ID 1 (factory setting).
To change the ID in the dialogue Search for devices in the network, proceed as follows:
1. Right-click with your mouse on the device in the list display in the dialogue.
2. In the context menu, select the command Change Fohhn-Net ID.
3. In the dialogue of the same name, enter a new ID for the device. Ensure that this ID
has not been used before.
Confirm by entering OK: Airea Master will now have this newly assigned ID.
You can change the ID of a Fohhn device at any time during operation. This must also be
located in the Fohhn-Net system. Proceed as follows:
1. Open the Device list via the button of the same name in the tool bar or via the menu
View.
2. Right-click with your mouse on a device in the list.
3. In the context menu, select the command Change Fohhn-Net ID.
4. In the dialogue of the same name, enter a new ID for the device.
5. Confirm by entering OK: the Fohhn device will now have this newly assigned ID.

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More information on setting up a Fohhn-NetS and about the Fohhn-Net ID assignment
can be found in section 4.1 ‘Setting up Fohhn-Net’ in the operation manual for Fohhn
Audio Soft.
3.3.4 Updating the firmware
In addition to Fohhn Audio Soft, the firmware on your devices determines the functional
scope of your Fohhn system. From time to time there will be updates for these data sets
which can be loaded within Fohhn Audio Soft (Internet connection required!).
More information about this can be found in section 6.1 ‘Firmware updates’ in the
Fohhn Audio Soft operation manual.

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3.3.5 Setting up and connecting an Airea system
Connect your Airea Master via the respective inputs and outputs (see section 3.2
‘Connections and Controls’) with the audio source and loudspeaker systems.
Connecting an Airea Master AM-4.4 with analogue input
Connecting an Airea Master AM-4.4 with Dante input
Steuerung über USB Adapter
Airea-Net
analog Audio in Airea
Speaker
Airea
Speaker
Audio
Source
NA-11 Fohhn-Net
Airea
Speaker
Airea
Speaker
PC USB
AM-4.4
ANA
Airea
Speaker
Airea
Speaker
Ethernet
Switch
Airea-Net
Steuerung über IP
AM-4.4
DAN
NA-4
Airea
Speaker
Airea
Speaker
Airea
Speaker
Airea
Speaker
Airea
Speaker
DanteAudioin Airea
Speaker
Dante
Audio
Source
PC Fohhn-Net

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3.3.6 Signal processing
Overview of the signalling chain in the Airea Master AM-4.4
The AM-4.4 has a 4 x 8 mix matrix, with which a separate mix of the 4 input channels can be
created for each of the 8 output channels. All input and output channels contain a Fohhn
DSP, which enables individual and universal signal processing.
More information can be found in the separate operation manual for Fohhn Audio Soft.
It can be downloaded from the Fohhn website: www.fohhn.com
3.3.7 Integration in a Dante™ network
Devices with a Dante™ interface are connected to the Dante™ audio network via an
Ethernet switch. Control of the Airea Master AM-4.4 takes place via the Fohhn-Net, i.e., via
the USB connector, or the Fohhn-Net connector. For control on a PC as well as Fohhn
Audio Soft, the Dante Controller software from Audinate is required (see section 3.3.3
’Fohhn-Net cabling and ID input’).
The Dante Controller software can be downloaded here free of charge:
https://www.audinate.com/products/software/dante-controller
Input 4
limiter
compressor
Input 2
lowpass
24dB
in
Output 2b
Fohhn DSP
gate
Fohhn DSP
Fohhn DSP
Input 3 Output 3b
Fohhn DSP Output 4b
delay
4 x 8 Mix
Matrix
10 band parametric
equalizer
Input 1
Fohhn DSP
Output 1a
Fohhn DSP
AM-4.4 signal processing:
Fohhn DSP
Output 1b
Fohhn DSP detail:
Fohhn DSP
hipass
24dB
Output 2a
Fohhn DSP
Fohhn DSP
Output 4a
Fohhn DSP
out
Fohhn DSP Output 3a