CasaTunes CT-5X4 Matrix Amplifier

Important Safety Instructions

  1. Read these instructions.
  2. Keep these instructions.
  3. Follow all instructions.
  4. Do not use this apparatus near water.
  5. Clean only with dry cloth.
  6. Do not block any ventilation openings.
  7. Install in accordance with the manufacturer’s instructions.
  8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus(including other amplifiers) that produce heat.
  9. Use the apparatus only in Moderate climates (not in tropical climates).
  10. Do not defeat the safety purpose of the polarized or grounding type plug. A polarized plug has two blades with one wider than the other, a grounding type plug has two blades and a third grounding prong, the wide blade or the third grounding prong are provided for your safety. If the provided plug does not fit onto your outlet, consult an electrician for replacement of the obsolete outlet.
  11. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.
  12. Only use attachments and accessories specified by the manufacturer.
  13. Unplug this apparatus during lightning storms or when unused for long periods of time.
  1. Ensure there is adequate ventilation. Leave 20cm (8”) of free space at the top and sides. Good airflow is necessary to help ensure proper operation. Not only should you provide enough free space around the unit, but also ensure that air can flow freely and escape from the amplifier surroundings. Failure to do so may cause thermal shutdown of the unit, and reduced life expectancy.


Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as:

  • When the power supply cord or plug is damaged
  • If liquid has been spilled, or objects have fallen into the apparatus.
  • If the apparatus has been exposed to rain or water.
  • If the apparatus has been dropped or damaged in any way.
  • If the apparatus does not operate normally by following the instructions. Adjust only those controls that are covered by the operating instructions.
  • When the apparatus exhibits distinct change in performance this indicates a need fora service.

WARNING! Do not expose the apparatus to dripping or splashing.Do not place objects filled with liquids near the apparatus.

WARNING! To reduce the risk of fire orelectric shock, Do not expose this apparatus to rain or moisture.

WARNING! Equipment must be connected to a Mains socket outlet with a protective earthing connection.

WARNING! Never push objects of any kind into the apparatus through openings as they may touch dangerous voltage points or short-out parts that could result in a fire or electric shock.

IMPORTANT! Ensure adequate ventilation.



Occasionally you should dust the unit all over with a soft cloth. For stubborn stains, use a soft cloth dampened with a weak solution of mild detergent and water. Dry the unit immediately afterwards with a clean cloth. Don’t use abrasive cloths, thinners, alcohol, or other chemical solvents, because they may damage the finish or remove the panel lettering.



AC outlet voltages vary from country to country. Make sure that the voltage in your area meets the voltage requirements printed on the unit’s power adapter. e.g. ~ 110V / 240V, 50/60HZ.

If you do not intend to use the unit for an extended period, remove the power cord from the AC outlet.

Never Touch This Unit with Wet Hands

Never handle this unit or its power cord while your hands are wet or damp. If water or any other liquid gets inside this unit, have it checked by your CasaTunes dealer

Handling Notes

The AC fuse inside the unit is not user-serviceable. If you cannot turn on the unit, contact the dealer from whom you purchased this unit.

  1. If you need to transport this unit, use the original packaging
  2. Do not leave rubber or plastic items on this unit for a long time; they may leave marks on the case.
  3. This unit’s top and rear panels may get warm after prolonged use. This is normal.

Speaker Shorts

Under no circumstances should the speaker output terminals of the unit be short circuited, grounded or connected to another output.



The amplifier has four separate 30W @ 8 Ohms amplified zones.


You can add additional CT-5X4MA and CT-12X8MA matrix amplifiers to expand the number of zones beyond 4.

Alternatively, the CT-5X4MA can also be used to add four zones to an existing CT-12X8MA matrix amplifier.

To share sources between units you can either configure your amplifiers in stack mode or distributed sources mode.

When configured in stack mode you must split the sources (using Y cables and optical cable splitters) so each source can be fed to both matrix amplifiers.

By default CasaTunes will disable the independent checkbox for each source.

COMING SOON: Information on how to share sources over IP using the amplifiers distributed sources capabilities.


The amplifier has five separate sources.

1 x local RCA source input

1 x Balanced RCA input (using the included BALTX2 adapter)

1 x Balanced Optical source input (using the included BALTX2 adapter)

The BALTX2 adapter allows the 2 connected sources to be located up to 300ft away from the amplifier.

2 x Configurable COAX digital input/output

You can adjust the gain on each source, up to +10dB in 2dB steps, allowing you to adjust and balance the volume level between all the sources

For each zone you can configure up to a 600ms delay for each source.

Room Settings

For each zone you can configure the maximum volume, power on volume, bass, treble, balance, loudness, gain, and mono or stereo settings.

7-band Equalizer

Each zone sports a 7-band equalizer. Use the amplifier web application (see below) to configure the equalizer settings for a zone.

Firmware Upgradeable

The amplifier may be updated in the field using the amplifier web application (see below).

Thermal Control

The amplifier automatically monitors the temperature and takes progressive action depending on the temperature.

When the temperature reaches:

  • 194°F (90°C) the amplifier volume is reduced 20dB
  • 212°F (100°C) the amplifiers are shut down until the temperature drops below 194°F (90°C)

Zone Linking

A zone may be linked to multiple zones. Zone linking ties the source selection together, and optionally the volume and standby. This is useful for closely coupled audio areas where it is advantageous to have different volume control but the same source, or the same volume with separate standby control. Zone linking is setup either via the front panel user interface or Web application

If you are using a CasaTunes Music Server, use Room Groups which behave similar to Zone Linking but offer even more flexibility

IP Control

The amplifier is controlled, monitored and programmed via Ethernet. We recommend using a CasaTunes CT-1, CT-2 or CT-3 music server to control the amplifier.

All CasaTunes music servers automatically discover all CT-5X4MA (and CT-12X8MA) matrix amplifiers in the network simplifying setup, and automatically manages IP address changes.


Each amplifier supports up to 2 keypads. The keypads can be assigned to control any of the zones in the system.

IR Forwarding

Each keypad includes an IR receiver. For each installed keypad, you can configure whether the IR signal received on a keypad should be forwarded to the IR OUT emitter based on the currently source selected (1-5) for the zone (assigned to the keypad)

Power Failure Restoration

After an AC power outage the amplifier restores its settings to the pre-interrupted state. All internal settings are stored in non-volatile memory.

Backup and Restore. Reset to Factory Defaults

You can backup the amplifier's current configuration settings, and restore them at a later date, if needed.

In addition, you can reset the amplifier to the factory defaults, if needed.

CasaTunes CT-5X4 Matrix Amplifier Front Panel

1 - S2/S3 (Input Sources 2 & 3)

Input sources 2 & 3 provide an analog RCA and digital optical input, respectively, using the included BALTX2 adapter. The BALTX2 adapter provides a balanced connection allowing sources to be located up to 300ft away.

2 - S1 (Input Sources 1)

Input source 1 requires an analog RCA connection.

3 - Infrared Receiver Output

Used to output routed IR from keypads Port 1 & Port 2.

4 - S4 IN/OUT (Input Source 4 or configurable output)

You can configure whether this is an input or output.

When configured as an digital coax input source, this is input source 4.

When configured as a digital coax output, you can assign it to Source 1 or Source 2, or to Zone 1, 2, 3 or 4.

5 - S5 IN/OUT (Input Source 5 or configurable output)

You can configure whether this is an input or output.

When configured as an digital coax input source, this is input source 5.

When configured as a digital coax output, you can assign it to Source 1 or Source 2, or to Zone 1, 2, 3 or 4.

6 - Keypad Ports

You can connect 1 or 2 keypads to control the CT-5X4MA. You can assign the zone to be controlled by each port. In addition, you can configure the IR Receiver on the keypads to be routed to the IR OUT emitter (based on the currently selected source for the zone)

7 - Ethernet network connection

Network connection

8 - Power supply connection

Connection to 15V external power supply (included)

9 - Speaker terminals

Plug in terminal clamp connectors accepts 16 gauge (1.5mm²) speaker wires

Example System Configuration

Figure 1 - Typical System Configuration

Figure 1 illustrates a possible CasaTunes multi room system configuration where the amplifier is powering audio into three listening zones (Kitchen, Master Bedroom, and Office), and the fourth zone, the Living Room, is being powered by an AV Receiver fed by the pre-amplified output from S5 OUT (which is configured to output Zone 4).

The TV Audio output is being fed into the CT-5X4MA matrix amplifier as S3 (input source 3) using the BALTX2 adapter. The BALTX2 balanced audio adapter allows the source component, TV, to be located up to 300 ft away from the CT-5X4MA matrix amplifier.

Each zone can choose to listen to either the CasaTunes music server stream or the TV Audio. In this example, there are two unused input sources (S2 and S4) which can be connected to other music sources, such as additional CasaTunes music streams (using a CT-2 or CT-3), Amazon Echo Link, SONOS Port, etc.

Also shown In this example, is how the system is being controlled. You can use an Alexa enabled device and use your voice, you can use Android or iOS phones and/or tablets, and you can also use the optional CasaTunes KP2 keypads.

Using the Amplifier Web Application

If you are using a CasaTunes Music Server, then using the amplifier web application to setup one or more amplifiers, is not required. Instead use CasaSetup to configure your amplifiers, sources, and rooms.

The CasaTunes CT-5X4MA amplifier has a built-in web application which may be used for configuration, control and monitoring of amplifier functions.

To open the amplifier web application, enter either the IP address of the amplifier.  i.e.

Home Page

The home page provides access to the Amplifier Zones. Selecting a Zone opens its control page.

The Zone name defaults to Zone 1, Zone 2, Zone 3, etc.

If more than one amplifier is present, then all zones on all amplifiers are presented.

Zone Control Page

The Zone Control Page provides status & control of:

  • Standby (Power on/off)
  • Mute
  • Volume: Slider or Up/Down button with readout
  • Source Selection: S1 – S5, AirPlay and any Conditional sources  

A blue button indicates whether the item is selected or is ON.

The Zones button returns to the previous page.The Settings button opens the Settings page.

Zone Settings Page

The Zone Settings Page provides status & control of:

  • Bass
  • Treble
  • EQ - Allows you to configure the settings for the 7-band equalizer for the selected zone
  • Loudness  
  • Mono
  • Balance
  • Gain
  • Maximum Volume for the zone
  • Power On Volume for the zone
  • Delays for each Source: S1 – S5

The back arrow button returns to the Zone Control page.

Configuration using the Web application

To access the configuration pages in the browser enter the IP address with a config extension. i.e.

Device Configuration Page

The Device Configuration page provides Device information:

  • Model
  • Unit ID
  • Manufacturer Date 
  • Installed Firmware Version - When a new firmware version is available, as in the image below illustrates, simply click on the Firmware Update button (in red) to update the firmware.
  • Temperature of amplifier heat sink
  • IP Address
  • MAC Address
  • Amplifier assigned Network name

Wired Ethernet: The Network configuration is set to use DHCP by default. If a Static IP address is selected, then the IP settings will appear in a drop-down

Date & Time: Configure the NTP server and if/when Daylight Saving time is observed

KNX Interface: Not used when using a CasaTunes music server and should be disabled.

Airplay: Not used when using a CasaTunes music server and should be disabled.

Auto Power On/Standby:  Both Auto Power On and Auto Standby should be disabled when using a CasaTunes music server.

If Auto Power On is checked, zones are turned on when audio is detected on the sources selected in those zones. Likewise, if Auto Standby is not set to disabled, zones are turned off after the selected timeout when no audio has been present on their selected sources.

Airplay: Should be disabled when using a CasaTunes music server.

Digital Audio I/O: Used to configure whether this source is an input or output. When configured as a digital coax input source, this is input source 4 or 5, respectively. When configured as a digital coax output, you can assign it to Source 1 or Source 2.

By default, CasaTunes configures both of these sources as a digital input sources.

More Devices: If you have more than one CT-5X4MA or CT-12X8MA, select the matrix amplifier to configure.

Sources Configuration Page

This allows you to rename the audio Sources on the amplifier – the names will appear on connected keypads and Tablets or Mobiles running the CasaTunes App. Source names have a maximum of 15 characters (less when using exotic characters)

The gain of each analog source may also be adjusted using the Left/right buttons. These changes happen live.

Zones Configuration Page

All CasaTunes amplifiers on the network are listed. The Network Name (and IP address) for each device is displayed to show which unit is being configured. CasaTunes amplifiers have a network name label fixed on the cover panel (unless you changed the network/NetBIOS name).

Zone Settings: The Zone name may be changed – click the name to edit. Zone names have a maximum of15 Characters (less when using exotic characters). These names will appear on connected Keypads and Tablets running the CasaTunes App

The amplifier physical Zones 1- 4 are automatically assigned a range of System Zone numbers (typically 1-4). However, If this is not the first amplifier to be installed, then the System Zone numbers assigned will be the next available zone numbers. System Zone numbers should not overlap. There is an option to restore the default settings for an amplifier on the Management page.

You can assign the zone to be controlled by each Keypad Port. In addition, you can configure the IR Receiver on the keypads to be routed to the IR OUT emitter (based on the currently selected source for the zone)

Zone Linking: Not used when using a CasaTunes music server.

Zones can be linked together so that the source selection and optionally power and/or volume apply to all zones in the group.There is no limit to the number of zones in a group, but a zone may only be a member of a single group

IR Routing Configuration Page

You can configure whether the IR received via a keypad port is to be routed to the IR OUT emitter based on the currently selected source for the zone.

IR input selects the keypad port to configure for IR routing.

Selected IR Outputs is a table of check boxes that when checked transmits source related IR to the IR OUT emitter.

Management Page

Diagnostic Log is a useful tool for diagnosing connection issues and possible faults. This log is not stored in memory, so information is only collected during the current active power cycle.

The log shows current or recent amplifier activity which can be used by Tech Support in diagnosing some problems.

Events: Non-volatile log of certain parameters like power interruptions, high temperature events, etc.

Backup: The backup and restore functions allow the amplifier settings to be saved and restored. This can be useful in the event of an amplifier being replaced. Backup files from one Axium amplifier type may be loaded onto an Axium amplifier of another type thus simplifying the swapping in and out of Axium amplifiers of different types.

Backup and restores are performed for each individual amplifier.

When you select to backup the current settings, the settings are downloaded in to a xml file. You should save the xml settings file in the event that you need to perform a restore.

Restore: Select Choose File to select the xml backup file to restore.

Restore Defaults: Select to reset all your configuration settings for this amplifier back to the factory default settings. We recommend you perform a backup before selecting this option (in case you need to revert back your changes).