Introduction
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.
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:
✉️ info@soundigitalusa.com
Package Contents
- 01 800.4 EVOX2 amplifier
- 01 Quick installation guide with warranty certificate
- 01 Allen wrench 2.0mm
- 02 Cables for high level input
- 01 Promotional sticker
*Merely illustrative image.
Safety Instructions
To avoid injury to the user or damage to the amplifier, read all safety instructions written on this manual.
- ⚠️ The installation of this product must be done by a qualified professional. In case of any doubt, please contact our technical support.
- ⚠️ When passing cables through metallic walls, use rubber O-rings to avoid cable cutting and short-circuits.
- ⚠️ 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.
- ⚠️ Make sure that the chosen location for the amplifier installation does not affect the operation of the vehicle.
- ⚠️ This product may reach temperatures over 60°C (140°F). Make sure it is cold before touching it.
- ⚠️ 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.
- ⚙️ 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.
- ⚠️ Fix the amplifier properly and firmly. Avoid fixing to metallic parts of the vehicle, as this procedure may cause ground looping (noise).
- ? Wear gloves, safety glasses and all necessary PPE during the installation of SounDigital amplifiers.
Warning! THIS "WARNING" SIGN ALERTS THE USER OF IMPORTANT INFO. NOT FOLLOWING THESE INSTRUCTIONS MAY CAUSE INJURIES TO THE USER OR DAMAGE TO THE EQUIPMENT.
Technologies
Dynamic Thermal Management - DTM®
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.
Diagram Description: A visual representation showing layers of an amplifier's cooling system. From bottom to top: Electronic Component, Conductive Copper Layer, and Aluminium Heatsink.
Ultra Compact PCB
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.
Diagram Description: A close-up view of a densely populated printed circuit board (PCB) with various electronic components.
I-Power Supply
SounDigital amplifiers are known for their low consumption of battery, and this feature was improved on the EVOX2 Line. The new I-POWER SUPPLY is even more modern, which replaces the old toroidal transformers by a new generation of "E-E" core transformers delivers efficiency above 90%*, ensuring more hours of sound without battery recharge.
*Efficiency measured at power supply only.
Diagram Description: A standard automotive car battery with positive (+) and negative (-) terminals clearly marked.
Vibration Absorption System - VAS®
Our VAS® Technology reduces all impact 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.
Diagram Description: A graphic illustrating sound wave energy reduction. It shows high sound wave energy entering an absorption device and low sound wave energy exiting.
Reduced Size
The technology used in our amplifiers bring both high performance and power into a compact chassis, providing flexible installation solutions for vehicles with limited space.
Diagram Description: Side and top views of the SounDigital amplifier showing its compact dimensions: 5.8 inches (length) and 4.4 inches (width/height).
Full Range
The 800.4 EVOX2 amplifier is a versatile product that cover the entire audible frequency range, any type of loudspeaker or music program.
Image Description: A red badge with white text that reads "FULL RANGE AMPLIFIER".
Assembling and Disassembling the Plastic Cover
The plastic covers are used to finish off and hide the amplifier's fixing screws. To disassemble and assemble them, follow the instructions below.
Disassembling of the Plastic Cover
Diagram Description: Two images showing the process of removing the plastic cover. Image 1 shows pulling the top part to release latches. Image 2 shows sliding the cover upwards to remove it.
- Carefully pull out the top of the plastic cover to release the upside latches, as shown in picture 1.
- Slide up the plastic cover in a continuous movement to remove it.
*Merely illustrative images.
Assembling the Plastic Cover
Diagram Description: Two images showing the process of reattaching the plastic cover. Image 1 shows aligning point A on the cover with point B on the amplifier. Image 2 shows pressing the sides of the cover down until it clicks into place.
- To fit the plastic cover back, carefully insert point A of the plastic cover into point B of the amplifier, slowly sliding it down.
- Gently press the sides of the top of the plastic cover towards the bottom of the amplifier until you hear a clicking noise.
*Merely illustrative images.
Panels Description
Front Panel Controls and Inputs
Diagram Description: A top-down view of the front panel of the SounDigital amplifier, showing numbered controls and inputs. Key elements include X-OVER (Crossover) controls, GAIN controls, HI INPUT (High Level Input) connectors, and RCA input connectors.
| # | Label | Description |
|---|---|---|
| 1 | CH1/CH2 | Variable crossover control (45Hz ~ 850Hz) |
| 2 | CH3/CH4 | Variable crossover control (45Hz ~ 850Hz) |
| 3 | CH1/CH2 | Audio input – High Level (To connect to the speaker output of the head unit) |
| 4 | CH3/CH4 | Audio input – High Level (To connect to the speaker output of the head unit) |
| 5 | CH1 | Audio inputs – RCA connectors |
| 6 | CH2 | Audio inputs – RCA connectors |
| 7 | CH3 | Audio inputs – RCA connectors |
| 8 | CH4 | Audio inputs – RCA connectors |
| 9 | CH1/CH2 | Crossover switch key: High Pass – Full – Low Pass |
| 10 | CH3/CH4 | Crossover switch key: High Pass – Full – Low Pass |
| 11 | CH1/CH2 | Variable Gain control |
| 12 | CH3/CH4 | Variable Gain control |
Rear Panel Connectors
Diagram Description: A rear view of the SounDigital amplifier, showing numbered connectors. These include speaker outputs for CH1, CH2, CH3, CH4 (positive and negative terminals, some supporting bridge mode), +12VDC power input, REM (Remote) input, GND (Ground) input, and a "POWER ON" LED indicator.
| # | Label | Description |
|---|---|---|
| 13 | CH1 | Positive speaker connector (+) |
| 14 | CH1 | Negative speaker connector (-) |
| 15 | CH2 | Positive speaker connector (+) |
| 16 | CH2 | Negative speaker connector (-) |
| 17 | CH3 | Positive speaker connector (+) |
| 18 | CH3 | Negative speaker connector (-) |
| 19 | CH4 | Positive speaker connector (+) |
| 20 | CH4 | Negative speaker connector (-) |
| 21 | - | Positive power supply connector (+12VDC) |
| 22 | - | Remote power supply connector (REM) |
| 23 | - | Negative power supply connector (GND) |
| 24 | Blue | "POWER ON" LED indicator |
Installation Sequence
Warning! 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.
- Fix the amplifier so that the connectors can be easily accessed.
- Install 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.
- Warning! THE MAXIMUM DISTANCE FOR THE INSTALLATION OF THE FUSE/CIRCUIT BREAKER IS 12 INCHES (30cm) AWAY FROM THE BATTERY.
- Connect the power cables into the amplifier, observing the polarity. Connect all the positive cables (+) from the fuse holder or circuit breaker to the positive connector of the amplifier and all the negative power cables from the batteries to the negative connector of the amplifier.
- The ground cable must be as short as possible and must be connected to the vehicle chassis and the battery negative.
Diagram Description: An illustration showing how to prepare a connection point on the vehicle chassis. It depicts removing paint between the terminal and chassis for a good ground connection.
- Install the signal input cables in a proper way, distant from the power cables.
- Connect the RCA or the high level signal input cables to the head unit and amplifiers.
- Install the audio output cables with the appropriate section, distant from the power and audio input cables.
- Connect the audio output cables to the amplifier and speakers respecting the positive (+) and negative (-) polarities.
- Install the remote cable with the power cables, using 1.5mm² (15 AWG) cable or thicker.
- Connect 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).
- Before powering the system, verify all the connections and make sure there are no mistakes or short-circuits on the power and ground cables.
- Reconnect the ground of the batteries.
- Check if the head unit is turned off and then place the fuses in the fuse holders or switch the circuit breakers on.
- Turn on the main unit and the amplifier will turn on the "POWER ON" LED indicating that it is in operation.
Warning! Minimum recommended installation distance between amplifiers*: 1.18in. (30mm)
*For installations with more than one amplifier, second unit not included. Merely illustrative images.
Diagram Description: Two illustrations showing amplifier mounting. The left shows a single amplifier. The right shows two amplifiers mounted with adequate spacing, indicating the minimum recommended distance. A red 'X' is shown over an illustration of amplifiers mounted too close.
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.
| Power Rating (WRMS) | Power Cable (+12VDC) | Ground Cable (GND) | Speaker Cable |
|---|---|---|---|
| 800 WRMS | 10mm² (7 AWG) | 10mm² (7 AWG) | 2 x 1.5mm² (15 AWG) |
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.
Audio Inputs
RCA Inputs
Diagram Description: A diagram illustrating the connection of RCA input cables to the amplifier. It shows the left and right channel RCA inputs on the amplifier and their connection to a head unit. A warning symbol indicates that all RCA inputs must be connected for proper operation, and a "Y" cable should be used for mono sources.
⚠️ 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.
High Level Signal Inputs
Diagram Description: A diagram illustrating the connection of High Level input cables to the amplifier. It shows the High Level input terminals on the amplifier and their connection to the speaker outputs of a head unit. A red 'X' symbol indicates that High Level inputs should not be used simultaneously with RCA inputs.
⚠️ All High level signal inputs must be connected for the amplifier to work properly.
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.
Warning! RCA AND HIGH LEVEL INPUTS SHOULD NOT BE USED SIMULTANEOUSLY OR YOU MAY DAMAGE THE AMPLIFIER.
Wiring Diagram
4 Channels Wiring Diagram
Diagram Description: A wiring diagram showing how to connect the 800.4 EVOX2 amplifier in a 4-channel configuration. It illustrates connections from the battery (+12V, GND, FUSE) and REMOTE terminal to the amplifier, and then from the amplifier's speaker outputs (CH1, CH2, CH3, CH4) to the speakers. It also shows RCA input connections to the amplifier from a head unit.
In case of connections with more than one battery, see the installation diagram on page 15.
⚠️ 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.
| Model | Minimum impedance Per channel | Minimum impedance Bridge |
|---|---|---|
| 800.4 EVOX2 | 2Ω | 4Ω |
3 Channels Wiring Diagram
Diagram Description: A wiring diagram showing how to connect the 800.4 EVOX2 amplifier in a 3-channel configuration (e.g., two channels bridged for a subwoofer and one stereo channel for speakers). It illustrates connections from the battery (+12V, GND, FUSE) and REMOTE terminal to the amplifier, and then from the amplifier's speaker outputs to the speakers/subwoofer. It also shows RCA input connections.
In case of connections with more than one battery, see the installation diagram on page 15.
⚠️ 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.
| Model | Minimum impedance Per channel | Minimum impedance Bridge |
|---|---|---|
| 800.4 EVOX2 | 2Ω | 4Ω |
2 Channels Wiring Diagram (Bridge)
Diagram Description: A wiring diagram showing how to connect the 800.4 EVOX2 amplifier in a 2-channel bridged configuration, typically for a single subwoofer. It illustrates connections from the battery (+12V, GND, FUSE) and REMOTE terminal to the amplifier, and then from the bridged speaker outputs to the subwoofer. It also shows RCA input connections.
In case of connections with more than one battery, see the installation diagram on page 15.
⚠️ 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.
| Model | Minimum impedance Per channel | Minimum impedance Bridge |
|---|---|---|
| 800.4 EVOX2 | 2Ω | 4Ω |
Gain Setting
Necessary Equipment
- Digital AC voltmeter
- Media with sine wave test tone 60Hz recorded at 0db
- Screwdriver 1/8" (for gain setting)
Set Up Procedure
This procedure is the same for both gain controls.
- Turn the gain control all the way down.
- Disconnect the output cables from the amplifier outputs.
- Turn off all processing (bass, treble, loudness, EQ, etc.).
- Set the audio player volume to 3/4 of full volume.
- Set the audio player fader control to center position (left and right fader controls).
- Set the crossover selector switch in "F" (Full Range).
- Use a 60 Hz sine wave.
- Connect the AC voltmeter to the speaker output connectors of the amplifier. Make sure you test the voltage at the correct connectors (+ and -).
- Increase the gain control until the target voltage is observed with the voltmeter (see the chart below).
- Once you have adjusted the amplifier to the correct voltage output, turn off the source unit and reconnect the speaker(s).
| MODEL | STEREO / POWER | BRIDGE / POWER | STEREO OUTPUT VOLTAGE | BRIDGE OUTPUT VOLTAGE |
|---|---|---|---|---|
| 800.4 EVOX2 | 2Ω / 200W | 4Ω / 400W | 20.0 V | 40.0 V |
Download the tracks for set up in https://soundigitalusa.com/tracks-for-set-up/
Crossover Set Up
The crossover controls allow you to set the frequency range for your speakers.
Settings:
- "F" (Full Range): Set variable control in Full Range function; All frequencies will be reproduced.
- "LP" (Low Pass): Set variable control in Low Pass function.
- "HP" (High Pass): Set variable control in High Pass function.
Full Range (F): Change the switch to "F" position. All the frequencies will be reproduced.
Diagram Description: A frequency response graph showing a flat line at 0dB from 5Hz to 22kHz, representing full-range output.
High Pass (HP): Change the switch to "HP" position. Set the variable control between 45Hz and 850Hz ("A") where you want to perform the high pass cut filter.
Diagram Description: A frequency response graph showing a high-pass filter. Frequencies below a cutoff point (fc) are attenuated (shown by a downward slope starting around fc). The graph indicates attenuation at -3dB and -12dB points, with labels for "High Pass".
Low Pass (LP): Change the switch to "LP" position. Set the variable control between 45Hz and 850Hz ("B") where you want to perform the low pass cut filter.
Diagram Description: A frequency response graph showing a low-pass filter. Frequencies above a cutoff point (fc) are attenuated (shown by a downward slope starting around fc). The graph indicates attenuation at -3dB and -12dB points, with labels for "Low Pass".
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, SounDigital recommends that all batteries be connected to positive and negative busbars and the busbars connected to the amplifier, as shown in the diagram below:
⚠️ It is mandatory to install the fuse at a maximum distance of 12 inches from the battery.
Diagram Description: A correct battery connection diagram using busbars. It shows two batteries connected in parallel to positive and negative busbars, with fuses placed correctly near the batteries. The busbars are then connected to the amplifier's power terminals.
Diagram Description: A note stating that all cables, positive and negative, connected from the battery to the busbar must be the same length, and likewise the cables connected from the busbar to the amplifier.
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.
Diagram Description: An incorrect battery connection diagram without busbars. It shows three batteries connected in series/parallel without busbars, with fuses placed incorrectly. A red 'X' symbol indicates this configuration is to be avoided.
⚠️ It is mandatory to install the fuse at a maximum distance of 12 inches from the battery.
Technical Specifications
Parameters
| Parameter | Value |
|---|---|
| Power RMS @ 4Ω** | 4 x 132W |
| Power RMS @ 2Ω** | 4 x 200W |
| Power RMS (Bridge) @ 8Ω** | 2 x 264W |
| Power RMS (Bridge) @ 4Ω** | 2 x 400W |
| Frequency Response (-3dB) | 5Hz ~ 22kHz |
| Low Pass filter (12dB/octave) | 45Hz ~ 850Hz |
| High Pass filter (12dB/octave) | 45Hz ~ 850Hz |
| Operating Voltage | 8V ~ 16V |
| SNR | 91dB |
| Input Sensitivity (RCA) | 0.2 ~ 2V |
| Input Sensitivity (High Level input) | 1.5 ~ 15V |
| Current Draw (music) | 35A |
| Current Draw (max.) | 70A |
| Total Efficiency | 80% |
| Damping Factor (@100Hz nominal impedance) | 200 |
| Power Cable | 10mm² (7 AWG) |
| Speaker Cable | 2 x 1.5mm² (15 AWG) |
| Recommended Fuse* (music) | 40A |
| Recommended Battery (minimum) | 60Ah |
*It is mandatory to install the fuse at a maximum distance of 12 inches from the battery.
**Power at 14.4V @ 60Hz with a maximum THD of 1%. **POWER RATING ACCORDING TO CTA-2006 INDUSTRY STANDARDS.
Dimensional Data
Diagram Description: Top and side views of the SounDigital 800.4 EVOX2 amplifier with dimensions labeled. Top view shows 147.7mm (5.8") length and 101.0mm (4.0") width. Side view shows 113.0mm (4.4") height and 50.9mm (2.0") depth.
| Measurement | Value |
|---|---|
| Net Weight | 0.66 kg (1.45 lb) |
| Gross Weight | 0.79 kg (1.74 lb) |
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.
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.
The images presented in this document are representative and merely illustrative; therefore, they do not necessarily correspond to the actual product/model.
Tracks for Set up - SounDigital USA
