AXTON A544DSP User manual

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Thank you for purchasing this innovative AXTON amplifier!
To maximize the performance of this amplifier and your complete car audio system installation,
we recommend you acquaint yourself thoroughly with all technical features and controlling op-
tions of this AXTON amplifier. Please read this manual carefully, before attempting the installation.
If, after reading this manual, you still have questions regarding functions or the installation of the
amplifier, we recommend you consult your dealer.
SAFETY INSTRUCTIONS
nDo not turn on any function which may distract you while driving the vehicle.
Functions requiring sustained attention must only be used when the vehicle is at a complete
standstill. Make sure to always stop your vehicle in a safe place before operating these
functions. There are risks of causing an accident.
nKeep the volume at a low level to be able to hear exterior noises while driving the
vehicle. There are risks of causing an accident.
nDo not open the amplifier or undertake any modification of the product. There is a
risk of accident, fire or electric shock.
nOnly use this amplifier with 12V mobile applications. Any use other than for this
product intended may lead to fire, electric shock or injury.
nUse correct amperage fuses. There are risks of fire or electrocution.
nDo not obstruct radiators and/or vents. Internal overheating may occur and cause a fire.
nEnsure all connections are properly made. Check the section of cable and the type of
cable if it does not correspond with the use. There is a risk of fire, injury and/or damage to
the product.
nDo not use screw nuts or fasteners part of the steering or braking systems for
ground connection. The fasteners and nuts used for the brake and steering systems (or
any other security system) as well as various tanks must never be used for grounding. Use of
these parts as ground may deactivate the vehicle’s control system and cause a fire or other
technical problem.
nKeep all small objects which could be swallowed, such as the fasteners and screws,
out of the reach of children. Swallowing such objects may cause serious injuries. In the
event of swallowing any of these objects, immediately seek medical advice.
nBefore starting the installation, disconnect the negative terminal of the battery to
avoid any risk of injury, fire or damage to the equipment.

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TECHNICAL SPECIFICATIONS A544DSP
DSP
DSP type: ......................................AKM7735 Dual DSP
ADC:.............................................. 2x 24-bit
DAC: ..............................................2x 32-bit
DSP MHz: ...................................... 2x 150 MHz
Audio sampling frequency:...............192 kHz
BLUETOOTH
Bluetooth power class: ....................2
Bluetooth power: ............................1 mW / 0 dBm
Bluetooth range: .............................10 m
Bluetooth Frequency: ......................2.4 – 2.48 GHz
AMPLIFIER
Music Power Output 4/2 ohms:........30 W x 4
RMS Power Output 4/2 ohms: .........25 W x 4
Frequency response: ......................20Hz ~ 48 kHz
High-Level Sensitivity: .....................4.2 Vrms
High-Level Impedance: ...................39 Ohms
RCA max voltage: ...........................5 Vrms
Supply voltage range: .....................7.5 V – 16.5 V
Signal to noise ratio digital input: ..... > 112 dB
Signal to noise ratio analogue input: .> 106dB
THD: ............................................. 1 KHz < 0.02%
Damping factor: .............................>= 200
Standby current: .............................0.23 A
Maximum operating current: ............20 A
Maximum Remote output power: ......0.3 A
Dimensions (WxHxD): ..................... 177 x 40 x 114 mm
MAIN FEATURES
·4-channel Smart Class-A/B Amplifier with iOS or Android App controlled audio DSP functions
·10-channel DSP-controlled preout (5 Volt) including REM out to control additional amplifiers
·Optical and coaxial Input to connect the High-Res Audio interface ABT50 or another Axton DSP
·Optical Output to link the audio signal to another Axton DSP amplifier
·Bluetooth Audio Streaming with automatic source switching
·Plug’N’Play quick installation system by optional vehicle brand and model specific ISO wire
harness
·Auto-Turn-On function on high-level input
FUNCTIONALITY & ADJUSTABILITY
·Freely configurable active crossover: High-/Low-/Band-/Bypass with 6/12/18/24dB/Oct.
slope for each channel (Butterworth, Bessel or Linkwitz-Riley)
·Freely configurable 15-band parametric Equalizer for each channel
·Freely configurable 9-band parametric Input-Equalizer for each source
·Gain, Phase switch and Mute function for each channel
·Time Alignment for each channel (0 – 550 cm / 0 – 15.8 ms)
·Can save 5 memories in the amp and unlimited sound settings on the smartphone
·Dynamic Bass setting for powerful performance without subwoofer
·Noise Gate function to reduce car stereo background noise
INSTALLATION DIAGRAM A544DSP
HEAD UNIT
ORIGINAL CAR SOCKETS
HI-RES STREAMING INTERFACE
ATB50
DSP AMPLIFIER
A544DSP
Bright reecting Silver (chrome)
Illuminated
Infrared
Pantone WarmRed CV
DIMENSIONS A544DSP
Find your specific
cable on axton.de
40 mm
177 mm
114 mm

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CONNECTIONS + CONTROLS A544DSP
1* In some cases with old headunits the Auto-Turn-On function cannot work. If you meet this problem, please connect the
“ACC-IN” to the ACC/Amp Remote of the car stereo or another cable which will provide +12 V only when the car stereo
is turned on. Secondly select “REMOTE TURN ON” on the remote switch.
2* REM-Out: Connect this wire to the remote input of a separate amplifier, for example a mono amp for a subwoofer.
A544DSP MOUNTING INSTRUCTIONS
1. Before you start with the installation, make sure you know the security code of your
headunit (if applicable).
2. Remove the headunit from the dashboard and disconnect the main wire harness.
3. Wiring
A) Plug & Play: Find a place for the A544DSP and connect the optionally available car-
specific wire (www.axton.de) to the amp, to the headunit and the cars main wire harness.
Switch 5is to be set to “Signal turn on”.
B) RCA Line In: If you prefer using low level signal, then disconnect the speaker input cables
and connect your headunit and A544DSP with the RCA interconnects. You will also need to
use separate remote/ACC+ cable and switch to “Remote Turn On”.
4. For Hi-Res Sound from your smartphone: Connect the optical and coaxial cables to the
inputs of A544DSP and outputs of the AXTON ABT50. Connect your smartphone via
Bluetooth to the ABT50 for using APTX-HD standard or use the AXTON OTG cable for
absolutely lossless audio transmission: the signal is sent from your smartphone directly to the
amplifier without passing any D/A converter.
5. Connect the remote control for convenient operation of the Master Volume, Bass Extender
and Mute function. Recommended when using A544DSP without any headunit.
6. Connect the wire to the headunit.
7. Install the headunit back in the dashboard.
Stand-alone installation
When you intend to use the A544DSP without any headunit, please connect the optionally
available N-A480DSP-ISOFLX cable and connect the wires according to the wiring diagram.
Switch (4) is to be set to “Remote turn on”.
1POWER
Two color LED: Green light shows normal operation. Green light blinking shows a current
data transfer, i.e. receiving data from the app. Red light shows protection mode, i.e. too low
impedance.
2SPEAKER LEVEL INPUT/OUTPUT
This is the main connector for Plug & Play installation.
3ANTENNA
External Bluetooth antenna for data and audio streaming.
4OPTICAL OUTPUT CH9/CH10
To send the signals of CH9 and CH10 to another Axton DSP amplifier with optical input.
5REMOTE / SIGNAL TURN ON
Choose if the amp shall turn on by separate ACC+/Remote wire or by DC Offset signal.
6SERVICE
For internal use only.
7REMOTE CONTROL
Connect the optional RC for convenient operating of Master Volume, Bass Volume and Mute
function.
When you are using the ABT50 with OTG for iPhone for lossless audio transmission, the signal
is sent directly avoiding any converter. That’s awesome. But it also means that you are not able
to adjust the volume with your iPhone. Therefore you need to connect the separate available RC.
8LINE OUT CH5 - CH10
Extend your DSP controlled sound system by additional amplifiers (e.g. Axton A601).
Connect the RCA line outs of the A544DSP with the RCA input of your amplifier.
9OPTICAL INPUT
a) Connect to ABT50 for lossless Hi-Res audio transmission from your smartphone.
b) Connect another Axton DSP amplifier with optical output.
bl LINE IN CH1 - CH4
Connect the RCA outputs of the headunit to the RCA inputs CH1, CH2, CH3 and CH4
bm COAXIAL
This input provides power for the ABT50 and also receives audio data from this device. It’s
impossible to connect usual USB sticks.
20
1* ACC-in 11 GND
2* Rem-out 12 +B
3RR-in 13 FL+out
4RR+in 14 FL-out
5RL-in 15 FR+out
6RL+in 16 FR-out
7FL-in 17 RL+out
8FL+in 18 RL-out
9FR-in 19 RR+out
10 FR+in 20 RR-out
SPEAKER
7
1
4 52 3
98 bmbl
6

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APP FUNCTIONS A544DSPAPP INSTALLATION A544DSP
For Android phones only:
1. Download the A544DSP_V1.0.apk by scan of the QR code or download from the Axton
website www.axton.de. Install A544DSP_V1.0.apk to your Android smart phone.
2. Turn on Bluetooth, but do not pair the A544DSP in the Bluetooth settings.
3. Make sure that you enabled “Location” in your settings.
4. Open the app and press the “Connect” button in order to connect the amp with the app.
For iOS smart phones only:
1. Visit the Apple AppStore, search for ”A544DSP“ and install the app.
2. Turn on Bluetooth, but do not pair the A544DSP in the Bluetooth settings.
3. Open the app and press the “Connect” button in order to connect the amp with the app.
Scan to download and in-
stall the app from the Apple
AppStore
Scan to download and install the app
from the Axton homepage
www.axton.de
Open the Bluetooth settings on your smartphone and search for „BT Audio” device. Press
“connect” and enter the code “1234” to get the amp paired with your mobile. When you start
playing music on your mobile, the amp automatically mute the signal from your car stereo. Please
note: you cannot hear any warnings or navigation notes from your car stereo.
BLUETOOTH AUDIO STREAMING
Connect
Start the app and touch the “Connect” button in the upper center of the screen. After the
connection procedure is done successfully, the “Connect” button is getting green and the app
downloads the current settings from the amplifier.
Save to AMP
When you have done the settings, touch the „Save to AMP” button and chose the favorite to
transfer the settings to the amplifier. During the saving process do not switch off the amplifier as
this may lead to malfunction and/or damage.
Save to Phone
You can save the settings on your smartphone. To do this, press „Save on Phone” button, enter the
desired filename, and confirm with „OK“.
Load File
Shows the list of files saved on the smartphone. Touch the desired setup to load. If you want to
save the loaded file permanently on the amp, press now „Save to AMP” button.
Load Favorites
Select one of the favorites 1 – 5.
Dynamic Bass
Located on the left edge of the main screen, the “Bass” slider is a very effective way to increase
bass performance without overloading the speakers. Level at “0” = no Dynamic Bass function
active.
Level at “1” to “10” = the higher the value the higher the bass increasing.

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Dynamic Treble
Located on the left edge of the main screen, the “Treble” slider is a very effective way to increase Treble
performance without overloading the tweeters. Level at “0” = no Dynamic treble function active.
Level at “1” to “10” = the higher the value the higher the treble increasing.
Limiter
The limiter function is the reinsurance if you drive your car stereo hard on the limit. Turn up the
volume until you listen to distortion of the sound, especially the woofers and subwoofers. Now
choose the limit (db) value how much the limiter should reduce the sound volume level, choose
the speed how quickly the limiter shall reduce the sound volume level and finally how long the
limiter shall reduce the sound volume level.
Audio Source
In this menu you can choose the input signal. Analogue means the speaker signal from the
headunit, Bluetooth is for the internal Bluetooth Audio module, and coaxial / optical for the
corresponding input ports on the side panel of the amp.
If you choose automatic, the amp switches from analogue input to the other source once the
music playback starts from that source. When music playback is stopped or paused, the amp
switches back to analogue input.
Channel Routing
In this menu you can assign an input signal to each output channel – including desired gain
level. It is also possible to combine two or more input signals to one output channel. For better
convenience you can additionally label each channel.
Time Alignment
In this menu you can apply a time delay to the speaker signal to simulate an ideal listening
position.
How to do:
Note the distance between your listening position and each speaker. Choose the most distant
speaker as the reference for the other speakers.
With the aid of the following example, calculate the values for your speakers:
(FL) front left is 0.80 m from the listening position
(FR) front right is 1.40 m from the listening position
(RL) rear left is 0.50 m from the listening position
(RR) rear right is 1.30 m from the listening position
(SubW) subwoofer is 2.00 m from the listening position
Value for FL = SubW – FL FL = 2.00 – 0.80 m
Value for FR = SubW – FR FL = 2.00 – 1.40 m
Value for RL = SubW – RL RL = 2.00 – 0.50 m
Value for RR = SubW – RR RR = 2.00 – 1.30 m
SubW remains at the value “0”
Due to reflections in the cabin and probably inaccurate measuring the correct values for the
listening position may differ to the calculated values. So feel free to adjust the values by +/- 5 cm
until you perceive a stable and accurate front staging. If you like an absolute exactly setup, contact
your Axton dealer for a professional adjustment.
The Time alignment settings also apply to the corresponding preamp outputs.

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Input EQ
Depending on the source it might be necessary to flatten the input signal to receive an accurate
sound signal. This could be necessary especially in cars with basic OE speaker system without
separate tweeters. Some of the OE headunits of those cars are provided with an extreme treble
volume to get more treble sound out of the broadband speaker.
You can adjust the input EQ for each source separately.
You can adjust the Gain from -15 dB to + 15 dB
F0 means the frequency you would like to adjust.
You can choose a frequency from 20 – 20’000 Hz for each band. A popup window appears to
enter the value of the center frequency you want.
The Q factor (Q) determines the effect of the EQ filter (bandwidth) on the frequency band around
the chosen center frequency f0.
Example1: f0 = 1000 Hz
desired bandwidth of EQ filter = 1000 Hz (i.e. 500 Hz – 1500 Hz)
Q = 1
Example2: f0 = 1000 Hz
desired bandwidth of EQ filter = 200 Hz (i.e. 900 Hz – 1100 Hz)
Q = 5
Q factors from 0.3 to 9.9 are possible.
Noise Gate
The “Noise” function is intended to reduce the back ground noise of the head unit. If back
ground noise of the head unit is audible, increase the Noise Gate level by sliding to the left until
the noise disappeared. Please note that above a certain value the music quality also suffers.
Output EQ
You can create your sound according to your settings in the EQ menu. Depending on the grade
of required accuracy, you can adjust up to 15 bands of the parametric equalizer.
In the line „f0” tap on the band you want to adjust. A pop-up window appears to enter the value
of the center frequency you want. Confirm with „Ok“. In the line „Q” tap on the band you want to
adjust. A pop-up window appears to enter the value of the Q factor you want. Confirm with „Ok“.
Instead you can also touch “-“ or “+” to adjust the Q factor in 0.1 steps.
The Q factor (Q) determines the effect of the EQ filter (bandwidth) on the frequency band around
the chosen center frequency f0.
Example1: f0 = 1000 Hz
desired bandwidth of EQ filter = 1000 Hz (i.e. 500 Hz – 1500 Hz)
Q = 1
Example2: f0 = 1000 Hz
desired bandwidth of EQ filter = 200 Hz (i.e. 900 Hz – 1100 Hz)
Q = 5
Q factors from 0.3 to 9.9 are possible.
If required, you can choose independent equalizer preferences for each channel separately or
for all left and right channels together. Simply use the button “Combine” in the upper right and
choose to copy the values from the left channels to the right one or right to left.
To reset all settings to „0“, tap the „All Reset” button in the upper right corner. If you just want to
try out the presets and then go back to your personal preferences, exit without saving the app,
and then restart. The app will then load your saved preferences from the amplifier.
The EQ settings also apply to the corresponding preamp outputs.

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Crossover
In this menu you can assign a frequency band to the connected speakers that corresponds to their
recommended operating range. You can choose independent crossover settings for each channel
separately or for all left and right channels together. Simply use the button “Combine” in the lower
right and choose to copy the values from the left channels to the right one or right to left.
In the “HPF” line underneath the diagram you can set the highpass filter slope (OFF, 6 dB, 12
dB, 18 dB and 24 dB), the filter characteristics (Butterworth, Bessel, Linkwitz) and the cutting
frequency.
In the “LPF” line underneath the diagram you can set the lowpass filter slope (OFF, 6 dB, 12
dB, 18 dB and 24 dB), the filter characteristics (Butterworth, Bessel, Linkwitz) and the cutting
frequency.
The blue line in the diagram shows the set slope of the filter. Setting the slope to „OFF” means
the signal is unfiltered and contains all frequencies.
The filter settings also apply to the corresponding preamp outputs.
Gain Phase Mute
In this menu you can adjust the following settings for each individual channel: sound level, mute
and phase.
Adjust the gain by using the slider or with the +/- buttons.
Tap on 0 to switch between Phase 0 degrees or 180 degrees (inverted phase)
Tap on Mute to turn the channel off or on.
The Gain/Phase/Mute settings also apply to the corresponding preamp outputs.

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Wir danken Ihnen für den Kauf dieser innovativen AXTON Endstufe.
Damit Sie die Wiedergabequalität und die Leistungsfähigkeit dieses Verstärkers voll ausschöpfen
können, bitten wir Sie, sich eingehend mit den Möglichkeiten und technischen Features dieses
Verstärkers vertraut zu machen. Lesen Sie deshalb die nachfolgenden Abschnitte sorgfältig durch
und bewahren Sie diese Bedienungsanleitung auf.
Falls Sie im Anschluss weitergehende Fragen zu den Funktionen oder dem Anschluss dieser
Enstufe haben, kontaktieren Sie Ihren Händler.
SICHERHEITSHINWEISE
nBedienen Sie keine Funktion, die Sie während der Autofahrt ablenken könnte.
Funktionen, welche Ihre besondere Aufmerksamkeit erfordern, dürfen ausschliesslich
genutzt werden, wenn das Fahrzeug stillsteht. Stellen Sie sicher, dass Sie an einem sicheren
Ort parken, bevor Sie das Gerät bedienen. Es besteht sonst ein hohes Risiko eines Unfalls.
nHalten Sie die Lautstärke auf einem Level, wo Sie noch Geräusche von aussen
wahrnehmen können. Es besteht sonst ein hohes Risiko eines Unfalls.
nÖffnen und/oder modifizieren Sie das Produkt nicht. Es besteht sonst ein hohes Risiko
eines Unfalls, Feuers oder elektrischen Schlags.
nDer Verstärker ist ausschliesslich für Anwendungen in PKW mit einem 12 Volt
Bordnetz mit (-) Masse vorgesehen. Es besteht bei anderweitiger Verwendung ein hohes
Risiko eines Unfalls, Feuers oder elektrischen Schocks.
nVerwenden Sie für den Masseanschluss keine Mutter oder Befestigungen
der Bremse, Lenkung oder des Tanks. Die Nutzung dieser Teile kann die
Sicherheitseinrichtungen des Fahrzeugs deaktivieren oder zu Fehlfunktionen führen.Es
besteht daher ein hohes Risiko eines Unfalls oder Feuers.
nVerdecken oder behindern Sie keine Öffnungen oder Ventilatoren. Durch
Überhitzung besteht die Gefahr eines Feuers.
nStellen Sie sicher, dass alle Anschlüsse korrekt sind. Es besteht sonst ein hohes Risiko
eines Unfalls, Feuers oder elektrischen Schocks.
nHalten Sie kleine Objekte, wie zum Beispiel Schrauben und Muttern von Kindern
fern. Ein Verschlucken solcher Objekte kann schwerwiegende Folgen für die Gesundheit
haben. Im Fall eines Verschluckens suchen Sie umgehend ärztliche Hilfe.
nTrennen Sie vor der Installation den Minus-Pol von der Batterie, um Verletzungen
oder Beschädigungen am Produkt oder Fahrzeug zu vermeiden.

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TECHNISCHE SPEZIFIKATIONEN A544DSP
DSP
DSP type: ............................................ AKM7735 Dual DSP
ADC: ................................................... 2x 24-bit
DAC: ................................................... 2x 32-bit
DSP MHz: ............................................ 2x 150 MHz
Audio sampling frequency: ................... 192 kHz
BLUETOOTH
Bluetooth Klasse: .................................. 2
Bluetooth Leistung: ............................... 1 mW / 0 dBm
Bluetooth Reichweite: ............................ 10 m
VERSTÄRKER
Musik-Ausgangsleistung 4/2 Ohm: ......... 30 W x 4
RMS Ausgangsleistung 4/2 Ohm: .......... 25 W x 4
Wiedergabebereich: ............................ 20Hz ~ 48 kHz
High-Level Empfindlichkeit: .................... 4.2 Vrms
High-Level Empfindlichkeit: .................... 39 Ohm
RCA max Spannung: ............................. 5 Vrms
Betriebsspannung: ................................ 7.5 V – 16.5 V
Signal- / Rauschabstand Digital-Eingang: > 112 dB
Signal- / Rauschabstand Analog-Eingang: > 106 dB
THD: ................................................... 1 KHz < 0.02%
Dämpfungsfaktor: ................................. >= 200
Leerlaufstromaufnahme: ........................ 0.23 A
Maximale Stromaufnahme: ..................... 20 A
Max. Remote-Ausgangsstrom: ................ 0.3 A
Dimensions (LxHxB): ............................. 177 x 40 x 114 mm
HAUPTMERKMALE
·4-Kanal Smart Class-A/B Amplifier mit iOS oder Android App kontrollierten Audio DSP
Funktionen
·10-Kanal DSP-kontrollierter Vorverstärkerausgang (5 Volt) inklusive Remote-Ausgang zum
Ansteuern zusätzlicher Verstärker
·Optischer und koaxialer Eingang für das High-Res Audio Interface ABT50 oder einen anderen
Axton DSP
·Optischer Ausgang zum Verlinken des Signals zu einem weiteren Axton DSP Verstärker
·Bluetooth Audio Streaming mit automatischer Quellenumschaltung
·Plug’N’Play Installation mit optionalen fahrzeugspezifischen Anschlusskabeln
·Auto-Turn-On Funktion über High-Level Eingang
FUNKTIONEN & EINSTELLMÖGLICHKEITEN
·Frei einstellbare Aktivweiche: Hoch-/Tief-/Band-/Bypass mit 6/12/18/24 dB/Oct.
Flankensteilheit pro Kanal (Butterworth, Bessel oder Linkwitz-Riley)
·Frei einstellbarer 15-Band parametrischer Equalizer pro Kanal
·Frei einstellbarer 9-Band parametrischer Equalizer pro Eingangsquelle
·Gain, Phasenschalter und Mute Funktion pro Kanal
·Laufzeitkorrektur pro Kanal einstellbar (0 – 550 cm / 0 – 15.8 ms)
·Speicherplätze für eigene Settings: 5 auf dem Verstärker, unlimitiert auf dem Smartphone
·Dynamic Bass Funktion für kraftvolle Performance ohne Subwoofer
·Noise Gate Funktion zum Reduzieren des Grundrauschens des Radios
INSTALLATIONSSCHEMA
HEAD UNIT
ORIGINAL CAR SOCKETS
HI-RES STREAMING INTERFACE
ATB50
DSP AMPLIFIER
A544DSP
Bright reecting Silver (chrome)
Illuminated
Infrared
Pantone WarmRed CV
DIMENSIONS A544DSP
40 mm
177 mm
114 mm
Finden Sie Ihr
passendes Kabel
auf axton.de