SoundDigital EVOX2 400.2 User manual

OWNER´S MANUAL
400.2

Introduction.............................................................................................................................................................. 3
Package contents ............................................................................................................................................... 3
Safety instructions ............................................................................................................................................... 4
Technologies
®
DTM .................................................................................................................................................. 5
I-Power Supply ............................................................................................................................ 5
Vibration Absorption Device................................................................................................ 6
Reduced size............................................................................................................................... 6
Assembling and disassembling the plastic cover............................................................................ 7
Panels description
Audio inputs and controls .................................................................................................... 8
Power inputs and audio outputs ...................................................................................... 9
Installation sequence...................................................................................................................................... 10
Electrical dimensioning .................................................................................................................................. 11
Audio inputs
RCA inputs .................................................................................................................................. 11
High Level inputs ..................................................................................................................... 11
Gain Setting........................................................................................................................................................... 12
Crossovers set up ............................................................................................................................................ 13
Battery connection diagram ....................................................................................................................... 14
Wiring diagram.................................................................................................................................................... 15
Technical specifications
Parameters................................................................................................................................. 16
Dimensional data.................................................................................................................... 16
Additional Information.......................................................................................................... 16
Document revision code: 1000750003-001/FEB2023

PACKAGE CONTENTS
▪ 01 400.2 EVOX2 Amplifier
▪ 01 Installation quick guide with warranty card
▪ 01 Allen wrench 2.0mm
▪ 01 Cable for High level input
▪ 01 Promotional sticker
INTRODUCTION
3
DEAR CUSTOMER,
CONGRATULATIONS ON ACQUIRING A PRODUCT WITH THE HIGHEST
QUALITY AND TECHNOLOGY!
You have just purchased a SounDigital product of the highest technology and quality,
so we thank you for your confidence.
Class D Amplifiers:
Class D amplifiers have as main characteristics the audio quality, efficiency,
application versatility and compact design. Following are the advantages of these
features:
Audio Quality – In the past, Class D products had limited response and for higher
frequencies, Class AB products performed better, but their efficiency was very low. The
new technologies introduced by SounDigital resulted in a Class D amplifier with high
efficiency and superior Class AB performance.
Efficiency – SounDigital Class D amplifiers have total efficiency (output + power
source) greater than 70%, which guarantees lower battery consumption and less
heating.
Application Versatility – The flat full-frequency response of SounDigital amplifiers
allows them to be used in all car sound systems. Meeting the demands with extreme
quality.
Compact Design – The high efficiency and high technology applied, allows
SounDigital amplifiers to be very compact, facilitating installation in vehicles where
space is limited.
IMPORTANT INFORMATIONS
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.
To better understand and take advantage of all the functions of the product and use it
safely, read this manual carefully and if you have any questions, consult our support by
email [email protected].

SAFETY INSTRUCTIONS
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!
4
To prevent injuries to the user or damage to the amplifier, read all safety instructions
written on this manual;
If you are insecure about the installation of this equipment, get in touch with our
tech support or with a professional specialized in car audio installation;
Before proceeding with the installation of any electric equipment on your vehicle,
unplug the negative (-) terminal of the battery to avoid fires, injuries or damages;
Use your sound system safely. The continuous exposure to sound pressures over
85dB may cause irreversible hearing damage;
This equipment is for use in automotive DC voltage 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;
Mount the amplifier in a secure way. Avoid mounting it on metallic parts of the
vehicle, because it 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 location chosen for the amplifier installation does not effect the
operation of the vehicle;
This product may reach temperatures over 60°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 fuel tank, brake lines or 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.

5
TECHNOLOGIES
The DTM* is a dynamic thermal recovery system which always maintains a high efficiency
of the amplifier by accelerating the thermal exchange of electronic components with the
heatsink.
*Patent required.
ALUMINIUM
HEATSINK
CONDUCTIVE
COPPER LAYER
ELECTRONIC
COMPONENT
DYNAMIC THERMAL MANAGEMENT - DTM®
An intelligent layout, with great use of the PCB area
and the use of modern components with reduced
structure guarantee SounDigital products a
compact design, at the same time robust and with
excellent thermal efficiency.
ULTRA COMPACT PCB
*Efficiency measured at power supply only.
SounDigital amplifiers are known for their low
consumption of battery, and this feature was
i m p r o v e d o n t h e E VOX 2 L i n e . T h e n e w
I-POWER SUPPLY is even more modern, which
r e p l a c e s t h e o l d t o r o i d a l t r a n s f o r m e r s
by a new generation of "E-E" core transformers
delivers efficiency above 90%*, ensuring more
hours of sound without battery recharge.
I-POWER SUPPLY

4.7"
4.4"
6
TECHNOLOGIES
VIBRATION ABSORPTION
®
DEVICE - VAD
FULL RANGE
REDUCED SIZE
Our Technology reduces all impact
®
VAD
caused by vibration on the electronic circuit
board. This can include road vibration and
even vibration caused by sound waves,
increasing the reliability of our amplifiers.
Versatile products that cover the entire
audible frequency range, any type of
loudspeaker or music program.
The technology used in our
amplifiers bring both high
performance and power a
compact chassis, providing
flexible installation solutions for
vehicles with limited space.

7
1 2
21
DISASSEMBLING OF THE PLASTIC COVER
ASSEMBLING THE PLASTIC COVER
1. Carefully pull out the top of the plastic cover to release the upside latches, as shown in picture 1.
2. Slide up the plastic cover in a continuous movement to remove it.
1. To fit the plastic cover back, carefully insert the point A of the plastic cover into point B of the
amplifier, slowly sliding it down.
2. Gently press the sides of the top of the plastic cover towards the bottom of the amplifier until
you hear a clicking noise.
EN
ASSEMBLING AND DISASSEMBLING THE PLASTIC COVER
The plastic covers have the function of finishing and hiding the amplifier fixing
screws. To disassembling and assembling them, follow the instructions below.
B
A
*Merely illustrative images.
*Merely illustrative images.

2 41 155
PANELS DESCRIPTION
8
Variable Crossover control (45Hz ~ 850Hz)
Variable Gain control
1
-
Audio input – High Level connector
(To connect to the speaker output of the head unit)
3 6 7
Audio inputs – RCA connectors
3
2
CH2
CH1
CH2
CH1
5
4
-
6
7Low Pass / Full / High Pass filter switch key
-
"POWER ON" LED indicator
Azul

PANELS DESCRIPTION
9
Positive power supply connector (+12VDC)
9
10
11
8Positive speaker connector (+)
Negative speaker connector (-)
Channel 1 speakers
output connectors
10 11
8 9 12 13 14
-
Positive speaker connector (+)
Negative speaker connector (-)
Channel 2 speakers
output connectors
Negative power supply connector (GND)
Remote power supply connector (REM)
-
-
14
12
13

10
ØMount the amplifier in such a way you have access to the connectors;
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 or the high level signal input 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 (when not using the high level signal inputs);
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.
X XX
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)
*For installations with more than one amplifier, second unit not included. Merely illustrative images.
Warning!
Warning!
Warning!

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
High level input must be used when the main unit does not have RCA outputs.
When High level input is used, no remote connection is required, the amplifier
recognizes the audio signal and switches on.
If your source unit is not able to turn on the amplifier through the High level input,
the remote input should be connected normally.
ELECTRICAL DIMENSIONING AND AUDIO INPUTS
ELECTRICAL DIMENSIONING
11
RCA AND HIGH LEVEL INPUTS SHOULD NOT BE USED SIMULTANEOUSLY OR
YOU MAY DAMAGE THE AMPLIFIER.
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.
High level signal
inputs
RCA inputs
AUDIO INPUTS
All RCA inputs must be connected
for all the channels to work properly.
All High level signal Inputs must
be connected for all the channels
to work properly.
4mm² (11 AWG)
2 x 2mm² (14 AWG)

GAIN SETTING
GAIN SETTING
Necessary equipament:
ØDigital AC voltmeter;
ØMedia with sine wave test tone 60Hz
recorded at 0db;
Ø1/8" screwdriver (for gain setting).
Set up procedure:
Turn the gain control all the way
Ø
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);
ØO n c e y o u ha v e a d j u s t e d t h e
amplifier to its correct voltage output,
t u r n o f f t h e so u r c e u n i t a n d
reconnect the speaker(s).
Download the tracks for set up in https://soundigitalusa.com/tracks-for-set-up/
MODEL BRIDGE / POWER
STEREO / POWER
STEREO
OUTPUT VOLTAGE
BRIDGE
OUTPUT VOLTAGE
4 / 1x400WΩ2 / 2x200WΩ20V 40V
400.2
12

CROSSOVER SET UP
Ø Change the switch to "F" position (Full Range) - All the frequencies
will be reproduced.
Ø Change the switch to "HP" position - Set in the variable control between 45Hz
and 850Hz ("A") where you want to perform the high pass cut filter;
0dB
-3dB
5Hz 22kHz
dB
Hz
-3dB
c/2
ƒ
High
Pass
c
ƒ
High
Pass
A
0dB
-12dB
dB
Hz
Ø Change the switch to "LP" position - Set in the variable control between 45Hz
and 850Hz ("B") where you want to perform the low pass cut filter .
-3dB
0dB
-12dB
Low
Pass
B
c
ƒc*2 ƒ
Low
Pass
dB
Hz
13
"F" Set in the variable control on Full Range Function;
"LP" Set in the variable control on Low Pass Function;
"HP" Set in the variable control on High Pass Function.

1
2
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:
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.
14
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

WIRING DIAGRAM
2 CHANNELS WIRING DIAGRAM
1 CHANNEL WIRING DIAGRAM
GND
FUSE
(PER CHANNEL)
FUSE
GND GND
15
All RCA inputs must be connected for
all the channels to work properly.
See "AUDIO
INPUTS" on page 11
+12V
In case of connections with
more than one battery, see the
installation diagram on page 14.
Minimum impedance
400.2 EVOX2 4Ω2Ω4Ω
(PER CHANNEL)
GND
FUSE
FUSE
GND GND
All RCA inputs must be connected for
all the channels to work properly.
See "AUDIO
INPUTS" on page 11
+12V
In case of connections with
more than one battery, see the
installation diagram on page 14.
Minimum impedance
400.2 EVOX2 4Ω2Ω4Ω
(BRIDGE)

Recommended Battery (minimum)
40Ah
TECHNICAL SPECS
Frequency Response (-3dB)
Low Pass filter (12dB/octave)
Operating Voltage
SNR
Input Sensitivity (RCA)
Current Draw (music)
Total Efficiency
Recommended Fuse* (music)
Current Draw (max.)
High Pass filter (12dB/octave)
Power RMS (Bridge) @ 4Ω**
1 x 400W
Power RMS (Bridge) @ 2Ω**
N/A
Power RMS @ 2Ω**
2 x 200W
Power RMS @ 1Ω**
N/A
5Hz ~ 22kHz
8V ~ 16V
101dB
0.19 ~ 2.1V
21A
42A
88%
200
25A
45Hz ~ 850Hz
16
Power RMS @ 4Ω**
2 x 132W
1.51V ~ 16.76V
Input Sensitivity (High Level input)
PARAMETERS
**Power at 14.4V @ 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.
2 x 2mm² / 14 AWG
4mm² / 11 AWG
Power Cable
Speaker Cable
Damping Factor (@100Hz nominal impedance)
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.
DIMENSIONAL DATA
Net Weight
Gross Weight
0.518 kg 1.14 ( lb)
0.716 kg 1.57 ( lb)
120.2mm (4.7") 106.0mm (4.1")
113.0mm (4.4")
101.0mm (3.9")
50.9mm (2.0")
4Ω
400.2
45Hz ~ 850Hz

Document revision code: 1000750003-001/FEB2023