Soundigital 400.4 EVO6 User manual

400.4
OWNER´S MANUAL

Document revision code: 1000750534-003/SEP2023
Introduction..................................................................................................................................................... 3
Package contents ...................................................................................................................................... 3
Safety instructions ...................................................................................................................................... 4
Panels description
Audio inputs and controls ............................................................................................ 5
Power inputs and audio outputs .............................................................................. 6
Installation sequence................................................................................................................................ 7
Electrical dimensioning ........................................................................................................................... 8
Audio inputs
RCA inputs ............................................................................................................................ 8
Crossovers set up...................................................................................................................................... 9
Wiring diagram
Four channels wiring diagram................................................................................ 10
Three channels wiring diagram ............................................................................. 10
Two channel wiring diagram ..................................................................................... 11
Procedure for setting the Gain .......................................................................................................... 11
Battery connection diagram .............................................................................................................. 12
Technical specifications
Parameters......................................................................................................................... 13
Dimensional data............................................................................................................ 13
Additional Information............................................................................................................................ 13

INTRODUCTION
3
Dear Consumer,
Congratulations, you have just acquired a SounDigital product of the highest
technology and quality, so we thank you for your trust.
SounDigital products are made with raw materials of the highest quality
standards, and the most modern processes, equipment and technology are
used in their production.
PACKAGE CONTENTS
▪ 01 400.4 EVO6 amplifier
▪ 01 Quick installation guide with warranty certificate
IMPORTANT INFORMATION
On this manual you will learn about the product, its features and
characteristics, in order to obtain the best result and to be able to enjoy your
music with SounDigital quality and power.
Read this manual carefully and follow precisely all the information contained
therein, these are very important and allow your amplifier to work optimally. If you
think it is necessary, please do not hesitate to contact our technical support at the
following contact:
[e-mail]
*Merely illustrative image.

SAFETY INSTRUCTIONS
4
THIS "WARNING" SIGN ALERTS THE USER OF IMPORTANT INFO. NOT FOLLOWING
THESE INSTRUCTIONS MAY CAUSE INJURIES TO THE USER OR DAMAGE TO THE
EQUIPMENT.
Warning!
To avoid injury to the user or damage to the amplifier, read all safety instructions
written on this manual.
Before proceeding with the
installation of any electric
equipment on your vehicle,
u n p l u g t h e n e g a t i v e ( - )
terminal of the battery to avoid
fires, injuries or damages;
Use your sound system safely.
The continuous exposure to
sound pressures over 85dB
m a y c a u s e i r r e v e r s i b l e
hearing damage;
This equipment is for use in
a u t o m o t i v e D C v o l t a g e
batteries between 12.6 and
14.4 volts. Before installing the
equipment, check voltage of
the batteries;
Do not install the amplifier in
places exposed to water, dirt
or humidity;
Choose a ventilated place to
install the amplifier and avoid
blocking the side ventilation
windows;
Fix the amplifier properly and
firmly. Avoid fixing to metallic
parts of the vehicle, as this
procedure may cause ground
looping (noise);
When passing cables through
metallic walls, use rubber
O-rings to avoid cable cutting
and short-circuits;
Make sure that the chosen
location for the am plif ier
installation does not affect the
operation of the vehicle;
T h is p rod u ct m ay r ea c h
t e m p er a tu r e s o ve r 6 0 ° C
(140°F). Make sure it is cold
before touching it;
Clean the amplifier periodically
with brush or dry cloth to
assure the thermal efficiency
of the heatsink;
Be careful when making holes
in the vehicle. Make sure you
are not making holes in the
fue l tan k , b ra ke lin e s o r
electrical cables of the vehicle;
Make sure the cables are
properly secured throughout
the installation;
Wear gloves, safety glasses
and all necessary PPE during
the installation of SounDigital
amplifiers.
X XX
X XX
The installation of this product
must be done by a qualified
professional. In case of any
doubt, please contact our
technical support;

PANELS DESCRIPTION
5
Variable Gain control
Audio inputs – RCA connectors
4
6
8
2
1
3
5
7Crossover switch key
Low Pass – Full – High Pass
CH1
CH3
CH1/CH2
CH3/CH4
CH2
CH4
CH1/CH2
CH3/CH4
2 17 85 3 64

PANELS DESCRIPTION
6
Positive speaker connector (+)
Blue
14
10
9
11
12
13
15
-
Negative speaker connector (-)
16
17
18
-
-
19
20
CH4
CH4
CH3
CH2
CH3
CH1
CH2
CH1
"POWER ON" LED indicador
Positive power supply connector (+12VDC)
Negative power supply connector (GND)
Remote power supply connector (REM)
Negative speaker connector (-)
Positive speaker connector (+)
Positive speaker connector (+)
Negative speaker connector (-)
Positive speaker connector (+)
Negative speaker connector (-)
1710 119 12 13 14 15 16 18 19 20

7
ØFix the amplifier so that the connectors can be easily accessed;
ØInstall the power cables in the vehicle properly, starting from the battery to the fuse holder
or circuit breaker, use the cable with the appropriate size. Make all connections, install fuse
holders or circuit breakers, but without placing the fuses or with the circuit breakers in the
"OFF" position;
ØConnect the power cables in to the amplifier, observing the polarity. Connect all the positive
cables from the fuse holder or circuit breaker to the positive conector of the amplifier (+)
and all the negative power cables from the batteries to the negative connector of the
amplifier;
ØThe ground cable must be as short as possible and must be connected to the vehicle
chassis and the battery negative;
ØInstall the signal input cables in a proper way, distant from the power cables;
ØConnect the RCA cables to the head unit and amplifiers;
ØInstall the audio output cables with the appropriate section, distant from the power and
audio input cables;
ØConnect the audio output cables to the amplifier and speakers respecting the positive (+)
and negative (-) polarities;
ØInstall the remote cable with the power cables, using 1.5mm² (15 AWG) cable or thicker;
ØConnect the remote power cable to the amplifier's "REM" terminal at the main unit's remote
power output;
ØBefore powering the system, verify all the connections and make sure there are no
mistakes or short-circuits on the power and ground cables;
Ø;Reconnect the ground of the batteries
ØCheck if the head unit is turned off and then place the fuses in the fuse holders or switch the
circuit breakers on;
ØTurn on the main unit and the amplifier will turn on the "POWER ON" LED indicating that it is
in operation.
INSTALLATION SEQUENCE
Remove the paint
between the terminal
and chassis
THE MAXIMUM DISTANCE FOR THE INSTALLATION OF THE FUSE/CIRCUIT BREAKER
IS 12 INCHES (30cm) AWAY FROM THE BATTERY.
BEFORE PROCEEDING WITH THE INSTALLATION, UNPLUG THE NEGATIVE TERMINAL
FROM ALL OF THE BATTERIES, TO AVOID FIRE, DAMAGE TO THE AMPLIFIER AND THE
USER HIMSELF.
*For installations with more than one amplifier, second unit not included. Merely illustrative images.
Minimum recommended
i n s t a l l a t i o n d i s t a n c e
between amplifiers*.
1.18in. (30mm)
Warning!
Warning!
Warning!

AUDIO INPUTS
RCA inputs
8
All RCA inputs must be connected for the amplifier to
work properly. If the signal source is mono type, use "Y"
cable at the input.
ELECTRICAL DIMENSIONING AND AUDIO INPUTS
ELECTRICAL DIMENSIONING
For proper operation of your SounDigital amplifier, you need the proper
dimensioning of the electrical system and the cables used.
The table below shows the minimum section of GND cables, +12VDC cables
and speaker output cables according to the power generated by the amplifier.
SPEAKER CABLE
GROUND CABLE (GND)
POWER CABLE (+12VDC)
400
WRMS
We recommend the use of only OFC (Oxygen Free Copper) cables on the
installation of our products.
Copper-clad aluminum wire (CCAW) must not be used.
6mm² (9 AWG)
2 x 1.5mm² (15 AWG)

9
CROSSOVER SET UP
Ø Change the switch to "F" position (Full Range) - All the frequencies will be
reproduced as in "Figure 1";
Ø Change the switch to "HP" position - All frequencies above 80Hz will be
reproduced as in "Figure 2";
"F" All the frequencies reproducedwill be
"LP" Frequencies below 80Hz will be reproduced
"HP" Frequencies above 80Hz will be reproduced
-3dB
c/2
ƒ
High
Pass
c
ƒ
High
Pass
A
0dB
-12dB
dB
Hz
Ø Change the switch to "LP" position - All frequencies below 80Hz will be
reproduced as in "Figure 3".
-3dB
0dB
-12dB
Low
Pass
B
c
ƒc*2 ƒ
Low
Pass
dB
Hz
0dB
-3dB
8Hz 20kHz
dB
Hz

Minimum impedance of use according to the model
400.4 EVO6 4Ω
Model Per channel Bridge
(PER CHANNEL)
WIRING DIAGRAM
All RCA inputs must be connected for the
amplifier to work properly. If the signal source
is a mono type, use a "Y" cable at the input.
Minimum impedance of use according to the model
400.4 EVO6 4Ω
Model Per channel Bridge
In case of connections with
more than one battery, see the
installation diagram on .page 12
REMOTE
(PER CHANNEL)
+12V
FUSE
+12V
FUSE
+12V
(PER CHANNEL)
(PER CHANNEL)
REMOTE
(PER CHANNEL)
+12V
FUSE
+12V
FUSE
+12V
(PER CHANNEL)
(BRIDGE)
4 CHANNELS WIRING DIAGRAM (PER CHANNEL)
3 CHANNELS WIRING DIAGRAM
In case of connections with
more than one battery, see the
installation diagram on .page 12
All RCA inputs must be connected for the
amplifier to work properly. If the signal source
is a mono type, use a "Y" cable at the input.

Minimum impedance of use according to the model
400.4 EVO6 4Ω
Model Per channel Bridge
GAIN SETTING
Necessary equipament:
ØDigital AC voltmeter;
ØMedia with sine wave test tone 60Hz
recorded at 0db.
Set up procedure:
This procedure is the same for both
Ø
gain controls;
ØTurn the gain control all the way down;
ØDisconnect the output cables from the
amplifier outputs;
ØTurn off all processing (bass, treble,
loudness, EQ, etc.);
ØSet the audio player volume to 3/4 of full
volume;
ØOn the audio player, set the fader control
to center position;
ØSet the crossover selector switch in "F";
Ø Use a 60Hz sine wave;
ØConnect the AC voltmeter to the
speaker output connectors of the
amplifier. Make sure you test the
voltage at the correct connectors
(+ and –);
ØIncrease the gain control until the target
voltage is observed with the voltmeter
(see the chart below);
ØOnce you have adjusted the amplifier
to the correct voltage output, turn off the
source unit and reconnect the
speaker(s).
MODEL BRIDGE /
POWER
STEREO /
POWER
STEREO OUTPUT
VOLTAGE
BRIDGE OUTPUT
VOLTAGE
4 / 200WΩ2 / 100WΩ
WIRING DIAGRAM / GAIN SETTING
2 CHANNELS WIRING DIAGRAM (BRIDGE)
14.14V 28.3V
11
Download the tracks for set up in https://soundigitalusa.com/tracks-for-set-up/
REMOTE
+12V
FUSE
+12V
FUSE
+12V
(BRIDGE)(BRIDGE)
All RCA inputs must be connected for the
amplifier to work properly. If the signal source
is a mono type, use a "Y" cable at the input.
In case of connections with
more than one battery, see the
installation diagram on .page 12
4Ω
400.4

BATTERY CONNECTION DIAGRAM
When necessary the association of one or more battery banks to supply the
necessary current to the amplifier, it is recommended to use batteries of the same
brand, model, and if possible the same manufacturing lot so that the system has
the maximum performance.
For an ideal energy performance, we recommend that all batteries be connected to
positive and negative busbars and the busbars connected to the amplifier, as
shown in the diagram below:
12
1
2
2
3
1
Battery connections without the use of a busbar,
as shown in the example below, must be avoided.
This setting decreases the efficiency of supplying
power to the system.
All cables, positive and negative,
connected from the battery to the
busbar must be the same length.
Likewise the cables connected from
the busbar to the amplifier.
FUSE
FUSE
FUSE
FUSE
It is mandatory to install the fuse at a
maximum distance of 12 inches from the battery.
It is mandatory to install the fuse at a
maximum distance of 12 inches from the battery.
FUSE
FUSE
BUSBAR
BUSBAR

Operating Voltage
SNR
Input Sensitivity (RCA)
Current Draw (music)
Current Draw (max.)
Total Efficiency
Damping Factor (@100Hz nominal impedance)
Power Cable
Recommended Fuse* (music)
Recommended Battery (minimum)
Low Pass filter (12dB/octave)
Power RMS (Bridge) @ 4Ω**
Power RMS @ 4Ω**
Frequency Response (-3dB)
Speaker Cable
Power RMS @ 2Ω**
High Pass filter (12dB/octave)
TECHNICAL SPECS
PARAMETERS
**Power at 12.6V @ 60Hz with a maximum THD of 1%.
*It is mandatory to install the fuse at a maximum distance of 12 inches from the battery.
**POWER RATING ACCORDING TO
CTA-2006 INDUSTRY STANDARDS.
DIMENSIONAL DATA
13
ADDITIONAL INFORMATION
The values presented are based on measurements performed in
SounDigital's laboratories. All the equipment used in the assays, tests,
measurements and gauging of the technical parameters of SounDigital
products were calibrated in certified laboratories, thus ensuring the
performance and standard of excellence of the developed products.
The Manufacturing Process may present variations, and the electronic
components may also present changes in values in relation to their
nominal parameters. Thus, causing small differences between
measurements taken. Small variations in the values presented and
divulged by SounDigital are recognized.
The images presented in this document are representative and
merely illustrative; therefore, they do not necessarily correspond to the
actual product/model.
Updates of information made in this document will always be
published and made available for consumer consultation, free of
charge, on the brand's websites. The user is advised to search for
the manual in its latest version when necessary.
Power RMS (Bridge) @ 2Ω**
2 x 200W
4 x 66W
8Hz ~ 20kHz
9V ~ 16V
94dB
0.2V ~ 2V
20A
40.5A
78%
200
6mm² (9 AWG)
25A
40Ah
80Hz
4 x 100W
80Hz
2 x 1.5mm² (15 AWG)
N/A
4Ω
400.4
46.9mm (1.8")
86.8mm (3.4")
107.9mm (4.2")
104.1mm (4.1")
49.6mm (1.9")
0.389 kg 0.857 ( lb)
0.437 kg 0.963 ( lb)
Net Weight
Gross Weight

Document revision code: 1000750534-003/SEP2023