SounDigital 1200.4 EVOX Amplifier Owner's Manual
Brand: SounDigital
Introduction
Congratulations on acquiring a SounDigital 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. 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. 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 info@soundigitalusa.com.
Package Contents
- 1 EVOX Amplifier
- 1 Installation quick guide with warranty card
- 1 Allen wrench 2.0mm
- 1 Allen wrench 2.5mm
- 1 Allen wrench 3.0mm
- 2 Cables for high level input
- 1 Promotional sticker
Safety Instructions
To prevent injuries or damage to the amplifier, read all safety instructions carefully:
- If unsure about installation, contact tech support or a professional car audio installer.
- Before installing any electrical equipment, unplug the negative (-) terminal of the battery to avoid fires, injuries, or damages.
- Use the sound system safely. Continuous exposure to sound pressures over 85dB can cause irreversible hearing damage.
- This equipment is for automotive DC voltage batteries between 12.6V and 14.4V. Check battery voltage before installation.
- Do not install the amplifier in places exposed to water, dirt, or humidity.
- Choose a ventilated location and avoid blocking side ventilation windows.
- Mount the amplifier securely. Avoid mounting on metallic parts that could cause ground looping (noise).
- Ensure the installation location does not affect the vehicle's operation.
- When passing cables through metallic walls, use rubber O-rings to prevent cable cutting and short-circuits.
- Clean the amplifier periodically with a brush or dry cloth to ensure heatsink thermal efficiency.
- This product may reach temperatures over 60°C (140°F). Ensure it is cold before touching.
- Be careful when making holes in the vehicle; do not drill into the fuel tank, brake lines, or electrical cables.
- Ensure all cables are properly secured throughout the installation.
- Wear gloves, safety glasses, and necessary PPE during installation.
⚠️ Warning! This "WARNING" sign alerts the user to important information. Not following these instructions may cause injuries or damage to the equipment.
Technologies
Dynamic Thermal Recovery (DTR)
Diagram Description: An illustration shows an amplifier's internal component structure. It features an aluminum heatsink with a conductive copper layer, housing electronic components. The diagram visually represents how heat is managed.
The DTR is a dynamic thermal recovery system that maintains high amplifier efficiency by accelerating thermal exchange between electronic components and the heatsink. (*Patent Required)
Ultra Compact PCB
Diagram Description: An image displays a densely populated printed circuit board (PCB) with various electronic components, showcasing a compact design.
An intelligent layout utilizing the PCB area and modern components with a reduced structure results in a compact, robust design with excellent thermal efficiency.
Vibration Absorption Device
Diagram Description: A diagram illustrates sound waves, depicted as wavy lines, entering an "ABSORPTION DEVICE." High sound wave energy is shown entering, and lower sound wave energy exiting, indicating vibration dampening.
SounDigital has incorporated a device into the EVO X products that acts like shock absorbers, reducing the impact of vibration on the electronic circuit board, thereby increasing amplifier life and reliability.
I-POWER SUPPLY
Diagram Description: An illustration of a car battery with a positive (+) and negative (-) terminal, connected by thick cables. A yellow lightning bolt symbol is superimposed on the battery, indicating power.
SounDigital amplifiers are known for low battery consumption. The EVOX Line features an improved I-POWER SUPPLY, utilizing a new generation of "E-E" core transformers instead of old toroidal transformers. This delivers efficiency above 90%, ensuring more hours of sound without battery recharge. (*Efficiency measured at power supply only)
Assembling and Disassembling the Plastic Cover
The plastic covers serve to finish the amplifier and hide the fixing screws. Follow these instructions for disassembly and assembly:
Disassembling the Plastic Cover
Diagram Description: Two illustrations show the process. Image 1 shows pulling the top of the plastic cover to release latches. Image 2 shows sliding the cover upwards.
- 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.
Assembling the Plastic Cover
Diagram Description: Two illustrations show the assembly. Image 1 shows aligning point A of the cover with point B on the amplifier. Image 2 shows pressing the sides of the top cover downwards.
- 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.
Panels Description
Front Panel
Diagram Description: An illustration of the amplifier's front panel displays numbered connectors and controls. A table below identifies each component.
| # | Label | Description |
|---|---|---|
| 1 | CH1/CH2 | Variable crossover control - 45Hz to 850Hz |
| 2 | CH3/CH4 | Variable crossover control - 45Hz to 850Hz |
| 3 | CH1/CH2 | High Level audio input (To connect to the speaker output of the headunit) |
| 4 | CH3/CH4 | High Level audio input (To connect to the speaker output of the headunit) |
| 5 | CH1 | Audio input - RCA connector |
| 6 | CH2 | Audio input - RCA connector |
| 7 | CH4 | Audio input - RCA connector |
| 8 | CH3 | Audio input - RCA connector |
| 9 | CH1/CH2 | Crossover Switch |
| 10 | CH3/CH4 | Crossover Switch |
| 11 | CH1/CH2 | Variable Gain Control |
| 12 | CH3/CH4 | Variable Gain Control |
| 13 | - | "Power ON" LED indicator (Blue) |
Rear Panel
Diagram Description: An illustration of the amplifier's rear panel displays numbered connectors. A table below identifies each component.
| # | Label | Description |
|---|---|---|
| 14 | - | Negative power supply connector (GND) |
| 15 | - | Remote power supply connector (REM) |
| 16 | - | Positive power supply connector (+12VDC) |
| 17 | CH1 | Positive speaker connector |
| 18 | - | Negative speaker connector |
| 19 | CH2 | Negative speaker connector |
| 20 | - | Positive speaker connector |
| 21 | CH3 | Negative speaker connector |
| 22 | - | Positive speaker connector |
| 23 | CH4 | Positive speaker connector |
| 24 | - | Negative speaker connector |
Electrical Dimensioning and Audio Inputs
Electrical Dimensioning
For proper operation, ensure correct electrical system dimensioning and cable usage. The table below shows minimum cable sections based on amplifier power.
| Parameter | 1200 WRMS |
|---|---|
| POWER CABLE | 16mm² - 5 AWG |
| GROUND CABLE | 16mm² - 5 AWG |
| SPEAKER CABLE | 2 x 1.5mm² - 15 AWG |
SounDigital recommends using ONLY OFC (Oxygen Free Copper) Cables.
Audio Inputs
RCA Inputs:
Diagram Description: A diagram shows the amplifier's RCA input jacks and how they connect to a head unit's RCA outputs. It indicates that all four RCA inputs must be connected for all channels to function.
All RCA inputs must be connected for the 4 channels to work.
High Signal Inputs:
Diagram Description: A diagram shows the amplifier's high-level input connectors and how they connect to a head unit's speaker outputs. It indicates that all four high-level inputs must be connected for all channels to function.
All High signal Inputs must be connected for the 4 channels to work.
High input is used when the main unit lacks RCA outputs. When using high inputs, no remote connection is required, as the amplifier detects the audio signal to switch on. If the source unit cannot turn on the amplifier via high-level input, connect the remote input normally.
⚠️ Warning! RCA AND HIGH INPUTS SHOULD NOT BE USED SIMULTANEOUSLY OR YOU MAY DAMAGE THE AMPLIFIER.
Installation Sequence
⚠️ Warning! BEFORE PROCEEDING WITH INSTALLATION, UNPLUG THE NEGATIVE TERMINAL FROM ALL BATTERIES TO AVOID FIRE, AMPLIFIER DAMAGE, AND USER INJURY.
- Mount the amplifier in a location providing easy access to connectors.
- Install power cables from the battery to the fuse holder or circuit breaker, using appropriately sized cables. Make all connections, install fuse holders or circuit breakers, but do not insert fuses or leave circuit breakers in the "Off" position yet.
- ⚠️ Warning! THE MAXIMUM DISTANCE FOR THE INSTALLATION OF THE FUSE/CIRCUIT BREAKER IS ONE FOOT (30CM) AWAY FROM THE BATTERY.
- Connect power cables to the amplifier, observing polarity. Connect positive cables from the fuse holder/breaker to the amplifier's positive connector and negative cables from the batteries to the amplifier's negative connector.
- The ground cable should be as short as possible and connected to the vehicle chassis and the battery negative.
- Diagram Description: An illustration shows a ground connection point on a vehicle chassis. It depicts removing paint from the chassis surface where the ground terminal will be attached to ensure a good connection.
- Install signal input cables properly, keeping them distant from power cables.
- Connect RCA or high signal input cables to the head unit and amplifier.
- Install audio output cables with appropriate sections, keeping them distant from power and audio input cables.
- Connect audio output cables to the amplifier and speakers, respecting positive (+) and negative (-) polarities.
- Install the remote cable alongside power cables, using 1.5mm² (15 AWG) or thicker cable.
- Connect the remote power cable to the amplifier's "REM" terminal from the main unit's remote power output (if not using high-level signal inputs).
- Before powering the system, verify all connections for mistakes or short-circuits on power and ground cables.
- Reconnect the battery ground terminals.
- Ensure the head unit is turned off, then insert fuses or switch on circuit breakers.
- Turn on the main unit. The amplifier's "On" LED will illuminate, indicating operation.
Wiring Diagrams
4 Channel Wiring Diagram
Diagram Description: A wiring diagram illustrates the connections for a 4-channel setup. It shows the amplifier's output terminals connected to four speakers, and the input/power terminals connected to a head unit (via RCA or high-level inputs) and the vehicle's battery (+12V, GND, REM).
Refer to "Audio Inputs" on page 10 for input connection details.
3 Channel Wiring Diagram
Diagram Description: A wiring diagram illustrates the connections for a 3-channel setup, typically using two channels bridged for a subwoofer and one channel for a speaker. It shows connections to speakers, head unit, and battery.
Refer to "Audio Inputs" on page 10 for input connection details.
2 Channel Wiring Diagram
Diagram Description: A wiring diagram illustrates the connections for a 2-channel setup, often used for bridging two channels for a single speaker or subwoofer. It shows connections to speakers, head unit, and battery.
Refer to "Audio Inputs" on page 10 for input connection details.
Gain Setting
Necessary Equipment:
- Digital AC voltmeter
- Media with a 60Hz sine wave test tone recorded at 0dB
- 1/8" Screwdriver (for gain adjustment)
Setup 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 source unit volume to 3/4 of its full volume.
- Set the source unit's fader control to the center position.
- Set the crossover selector switch to "F" (Full Range).
- Use a 60 Hz sine wave test tone.
- Connect the AC voltmeter to the speaker output connectors of the amplifier. Ensure you test at the correct connectors (+ and -).
- Increase the gain control until the target voltage is observed on the voltmeter (refer to the chart below).
- Once the amplifier is adjusted to its correct voltage output, turn off the source unit and reconnect the speaker(s).
Download setup tracks from: https://soundigitalusa.com/tracks-for-set-up/
| MODEL | STEREO / POWER | BRIDGE / POWER | STEREO OUTPUT VOLTAGE | BRIDGE OUTPUT VOLTAGE |
|---|---|---|---|---|
| 1200.4 EVOX 2Ω | 1Ω / 300W | 2Ω / 600W | 17.3 V | 34.6 V |
| 1200.4 EVOX 4Ω | 2Ω / 300W | 4Ω / 600W | 24.5 V | 49.0 V |
Crossover Set Up
The crossover control allows selection between "F" (Full Range), "LP" (Low Pass), and "HP" (High Pass) functions. The variable control range is 45Hz to 850Hz.
- "F" (Full Range): All frequencies are reproduced.
- "LP" (Low Pass): Set the variable control for the Low Pass Function.
- "HP" (High Pass): Set the variable control for the High Pass Function.
Switch Key to "F" position (Full Range): All the frequencies are reproduced.
Diagram Description: A graph shows a flat frequency response line at 0dB, indicating full-range output.
Switch key to "HP" (High Pass): Set the variable control between 45Hz and 850Hz (point "A") to perform the high pass cut filter.
Diagram Description: A graph illustrates a high-pass filter. The frequency response is flat at 0dB up to a cutoff frequency (fc), then rolls off at -12dB/octave. The diagram shows points A, fc/2, and fc, with labels "High Pass" and "High Pass".
Switch key to "LP" (Low Pass): Set the variable control between 45Hz and 850Hz (point "B") to perform the low pass cut filter.
Diagram Description: A graph illustrates a low-pass filter. The frequency response is flat at 0dB up to a cutoff frequency (fc), then rolls off at -12dB/octave. The diagram shows points B, fc, and fc*2, with labels "Low Pass" and "Low Pass".
Technical Specifications
Parameters:
| Parameter | 1200.4 EVOX 2Ω | 1200.4 EVOX 4Ω |
|---|---|---|
| Power RMS Bridge @ 4Ω* | 2 X 396W | 2 X 600W |
| Power RMS Bridge @ 2Ω* | N/A | N/A |
| Power RMS @ 2Ω* | 4 X 198W | 4 X 300W |
| Power RMS @ 1Ω* | 4 X 300W | N/A |
| Frequency Response (-3dB) | 5Hz - 22kHz | 5Hz - 22kHz |
| Low Pass filter (12dB/oct) | 45Hz - 850Hz | 45Hz - 850Hz |
| High Pass filter (12dB/oct) | 45Hz - 850Hz | 45Hz - 850Hz |
| Operating Voltage | 8V - 16V | 8V - 16V |
| SNR | 91dB | 91dB |
| Input Sensitivity | 0.2 - 4V | 0.2 - 4V |
| Current Draw (Music) | 57A | 58A |
| Current Draw (Max) | 113A | 116A |
| Total Efficiency | 84% | 82% |
| Damping Factor (@100Hz nominal impedance) | 200 | 200 |
| Stereo Minimum Impedance | 1Ω | 2Ω |
| Bridge Minimum Impedance | 2Ω | 4Ω |
| Fuse (music) | 60A | 60A |
| Recommended battery | 70Ah | 70Ah |
*Power at 12.6V @ 60Hz with a maximum THD of 1%.
Dimensional Data
Diagram Description: Three diagrams show the amplifier's dimensions. The top view shows a width of 7.1" (181mm). The front view shows a height of 2.2" (55mm) and a width of 6.4" (162mm). The side view shows a height of 5.4" (136") and a depth of 4.8" (121mm). The diagrams also indicate the model name "EVOX" on the unit.
Net Weight: 2.60 lb (1.18 kg)
Gross Weight: 2.95 lb (1.34 kg)
