DD AUDIO SX1000 Class D Monoblock and Full Range Amplifiers Owner’s Manual
- May 15, 2024
- DD AUDIO
Table of Contents
DD AUDIO SX1000 Class D Monoblock and Full Range Amplifiers Owner’s
INTRODUCTION
Thank you for purchasing a DD AUDIO® amplifier. All of our products are proudly developed at our headquarters in Oklahoma City, USA whereday in and day out we dedicate ourselves to the mission of providing our customers with products that meet or exceed our stringent standards of reliability and performance. All of our products are painstakingly designed to provide years of listening pleasure. To help ensure your satisfaction and the longevity of your equipment, it is highly recommended that you read this Owner’s Manual and familiarize yourself with the many features of your amplifier. To achieve optimum performance we suggest you have your amplifier installed by an Authorized DD AUDIO® Dealer.
We hope you enjoy using this DD AUDIO product, and if you have any questions regarding setup or installation after reading this manual, please contact the DD AUDIO technical support team.
WARNING
DD AUDIO” amps are built to play at high volumes beyond what your ears can
safely handle for extended periods of
time. Prolonged exposure to excessively high volume can cause permanent damage
to your hearing. In addition,operation of a motor vehicle while listening to
audio equipment at high volume levels may impair your ability to hear external
sounds such as: horns, warning signals, or emergency vehicles; thus,
constituting to a potential traffic hazard. You may also find your state has
laws governing the volume of an audio system in a car. Please be aware of all
local and state laws in your area. So, be smart, and behave yourself … As much
as possible.
SX SERIES DESIGN FEATURES:
- IPX67 WATERPROOF RATING
- 4 LAYER PCB
- 8 GAUGE POWER WIRES
- 12 GAUGE (SX1000) AND 16 GAUGE (SX4.1000) SPEAKER WIRES
- VARIABLE 24DB/OCT (SX1000) AND12DB/OCT (SX4.1000) CROSSOVERS
- REMOTE LEVEL CONTROL (SX1000)
- 5-WAY PROTECTION: SPEAKER SHORT, THERMAL, OVERLOAD, HI/LOW VOLTAGE, DC OFFSET DD
TECHNICAL SPECIFICATIONS
| SX1000| SX4.1000
---|---|---
Operating Voltage| 9-16| 9-16
Test Voltage| 14.4| 14.4
Input Channels| | 4
Output Channels| | 4
Continuous Wattage @ 4 Ohm| 500| 4×150
Continuous Wattage @ 2 Ohm| 775| 4×250 I 2×500
Continuous Wattage @ 1 Ohm| 1000| NA
Max Current Draw (Amps)| 100| 100
RCA Input Voltage Sensitivity| 8-0.4| 10 – 0.4
High Level Input Voltage Sensitivity| 8-0.4| 10 – 0.4
RCA Input S/N (dB)| >85| >85
Damping Factor| >70| >70
THD| < 0.1%| < 0.1%
Boost Level (dB)| 12| N/A
Frequency Response (Hz)| 10 · 20000| 10 – 20000
High Pass Filter (Hz)| NA| 50 -5000
Subsonic Filter (Hz)| 30-100| NA
Low-Pass Filter(Hz)| 50 · 20000| 50 -5000
Remote Subwoofer Control| Yes| N/A
Power Wire Gauge| 8| 8
Speaker Wire Gauge| 12| 16
Dimensions (in)| 7 X 4.5 X 2| 7 X 4.5 X 2
Dimensions (mm)| 178 X 115 X 50| 178x 115×50
CONTROL AND CONNECTION FOR SX SERIES AMPLIFIERS
SX1000 CONTROL PANEL
REMOTE HI/LOW INPUT:
Connect the source unit using the integrated pigtail. The RCA connections are designed for inputlevels from 0.4 – 8V. The pigtail also includes a 3.5mm connection for the remote level control knob.
SENS:
Adjust to match the amplifier’s input sensitivity to the output voltage of the source signal.
SUBSONIC:
Attenuates unwanted low frequency output below the selected frequency. Eliminating inaudible low frequencies increases amplifier efficiency and prevents subwoofer damage.
LPF:
Attenuates unwanted high frequency output above the selected frequency.
BASS BOOST:
Use to increase the output in frequencies centered around 45Hz. Most commonly used when the source material doesn’t contain high peak levels of bass in the source material. Setting the boost level to high can cause severe clipping and damage to the subwoofer and/or amplifier. Use in conjunction with the HPF and Subsonic filters to maximize the output of the subwoofer portion of the system.
CLIP:
When illuminated, the LED indicates a clipping signal.
PRO/PWR:
When illuminated blue indicates the amplifier is grounded, receiving +12V and REM power, and the outputs are active. When illuminated red indicates a general malfunction dueto speaker short, faulty connection or thermal protection.
SX1000 CONNECTION PANEL
+12V:
Connect to a fused +12V cable from the battery. Minimum power cable size is 4 gauge.
REM:
Connect attached lead to a switched +12V cable.
GND:
Connect attached lead to a ground wire going directly to the chassis of your vehicle. Minimum cable size is 4 gauge.
SPEAKER OUTPUT:
Connect attached leads to + and – speaker terminals. Minimum suggested speaker cable size is 16 gauge.
SX4.1000 CONTROL PANEL
HI/LOW INPUT:
Connect the source unit using the integrated RCA pigtail. The RCA connections are designed for input levels from 0.4 – 8V.
INPUT :
Used to select 2-channel or 4-channel input mode.
SENS:
Adjust to match the amplifier’s input sensitivity to the output voltage of the source signal.
LPF/FULUHPF SELECTOR:
When set to LPF the preamp will attenuate unwanted high frequency output to bass speakers. When set to FULL all frequencies will pass without attenuation. When set to HPF the preamp will attenuate unwanted low frequency output to mid- and high-frequency speakers.
HPF/LPF:
Used to set the frequency cutoff point for the speaker outputs when the LPF/FULL/HPF switch is set to LPF or HPF. When the switch is set to FULL this setting will have no effect on the audio.
CLIP:
When illuminated, the LED indicates a clipping signal.
PRO/PWR:
When illuminated blue indicates the amplifier is grounded, receiving +12V and REM power, and the outputs are active. When illuminated red indicates a general malfunction due to speaker short, faulty connection or thermal protection.
SX4.1000 CONNECTION PANEL
+12V:
Connect attached leads to a fused +12V cable from the battery. Minimum power cable size is 4 gauge.
REM:
Connect attached leads to a switched +12V cable.
GND:
Connect attached leads to a ground wire going directly to the chassis of your vehicle. Minimum cable size is 4 gauge.
SPEAKER OUTPUT:
Connect attached leads to the + and – speaker terminals. Minimum suggested speaker cable size is 16 gauge. When bridging the outputs connect the -L and the +R terminals to a 2 Ohm minimum load.
MOUNTING YOUR AMPLIFIER
- Mount your amplifier in a dry, well-ventilated environment.
- Before mounting the amplifier be sure the mounting location and screw placement will not present a hazard to any cables, wiring, fuel lines, fuel tanks, hydraulic lines or other vehicle systems or components.
- Securely mount the amplifier using appropriate hardware so that it does not come loose in the event of a collision or a sudden jolt to the vehicle.
- Do not mount the amplifier to any area that may have excessive vibration (like the subwoofer box).
- Take into consideration your vehicle’s safety equipment (air bags, seat belt systems, ABS brake systems, etc.) and avoid interfering with such equipment.
POWERING YOUR AMPLIFIER
Make sure your vehicle’s charging system is adequate for the amplifier you’re installing. Amplifiers don’t make power, they simply convert the current and voltage you give them into wattage. If your charging system is insufficient, your amp will not produce its full rated output. If the current or voltage supply drops too low, even for milliseconds, damage can be caused resulting in amplifier failure. This type of failure is not considered a manufacturer’s defect. The addition of even a small amplifier will increase the demand on your charging system. If you are unsure or have questions about your charging system, have it tested by a professional technician to determine its capability.
INSTALLATION
-
Disconnect the negative cable from the car battery.
-
Due to the power requirements of any aftermarket amplifier, the +12V connection should be made directly to the positive(+) terminal of the battery. For safety measures, install an in-line fuse (not included) as closets the battery’s positive(+) terminal as possible. The fuse ampere rating should not exceed the total value of the amplifier’s rated maximum current draw. If the fuse is further than 18 inches (wire length) from the battery you should re-evaluate the wire and fuse placement.
Run the power wire from the battery to the amplifier’s mounting location. To avoid a potential short to the body and a possible fire, this cable should never be run outside of the vehicle. You will also need to make sure no trim screws or sharp body metal will penetrate the power cable shielding. Don’t install the fuse yet. This will be the last thing you do. -
Connect a ground wire directly to the chassis of your vehicle. The grounding location should be made on metal as close to the amplifier as possible and should be no longer than 3 feet from your amplifier’s mounting location. Remove all paint, sound deadener, etc. from the area of grounding connection. Do not use seat belt bolts for grounding. It is advisable to test the ground with an ohmmeter. Test between the grounding point and the negative battery cable to insure a good low resistance connection (<0.5 Ohm).
-
For SX Series amplifiers REM is the only turn on/off method available.
- REM: If there is a Turn On Mode selector set it to REM then run an 18 gauge wire from an ignition controlled +12V source. This will be connected to the REM terminal on the amplifier and used to turn “ON/OFF” the amplifier remotely. Generally this will connect to the REM output of your source unit.
-
Run RCA signal cables from your signal source.
-
Run the speaker wire from the speakers to be powered to the amplifier’s mounting location. It is advised that you leave some extra length of wire at this point to ensure there is enough wire to easily make your connections once the amp is mounted. You can “clean it up” later.
-
Connect the power and ground wires to the amplifier. Make sure the polarity ( + and -) is correct to avoid damaging the amplifier. Only after this step should you install the fuse at the battery.
-
Connect the remote wire to the amplifier. At this time you should turn on the amp and make sure it turns on properly.
-
Turn the amplifier off and connect the speaker wires to the amp. Pay attention to the polarity(+ and -). If hooked up incorrectly it can cause poor sound due to phasing issues.
-
Connect the RCA signal cables.
-
Double check the amplifier’s crossover controls to verify they are roughly set for your system application. E.g. subwoofer, tweeters, midrange.
-
Now you can turn on the system and begin the fine tuning process. Turn the amp gain all the way down. Turn the head unit volume to somewhere around 75%. While playing a musical track, similar to the content that will most commonly be played on the system, turn the GAIN or SENS up until you see the corresponding clipping indicator on the amplifier or the remote gain knob begin to flash on the music.
-
Take your time and make only one adjustment at a time. It may take some time to get the system fully adjusted. During this time the amp is drawing current from the battery. You should check the battery voltage from time to time and re-charge it if it gets low. Low battery voltage can affect the way the amplifier performs.
-
If installing the amplifier with new speakers you may notice a slight change in your sound due to the natural breaking in of your speakers. At this time you may want to do some slight re-tuning to optimize your systems performance. DD AUDIO
TROUBLESHOOTING:
NO
POWER
- Check GND connection.
- Check voltage at the amplifier’s +12V and REM terminals.
- Check fuses.
NO SOUND ( NO OUTPUT )
-
Check the signal cables and speaker outputs with a test tone, 50Hz (sub
amps) or 1 kHz (full range), and AC Voltmeter to see if there is voltage
present at the output of the signal cables. -
Check all cable routing for shorts or faulty connections.
-
Check speakers to verify they are in proper operating condition.
PROTECTION (MOST COMMON CAUSES)
- SPEAKER SHORT: A connected speaker has a shorted or damaged speaker lead or voice coil.
- THERMAL: The amplifier overheated. The amplifier will automatically return to normal operation once its temperature drops below the thermal shutoff temperature. Make sure there is proper airflow with no obstructions around the amplifier to avoid further issues. In some applications an external fan may be required to keep the amplifier temperature below the thermal protection level.
- OVERLOAD: The connected speaker/s has too low of an impedance. HI/LOW VOLTAGE: The power input voltage has gone outside the voltage range of 9V-16V.
- DC Offset: There is a damaged transistor in the output section.
DISTORTION
- Make sure the input gain level is set appropriately. Also check the speaker quality when playing on another amplifier.
POOR BASS RESPONSE
- Check the crossover sections for incorrect settings and check the speaker cables for reversed polarity connections.
BUZZING
SOUND
- Check the amplifier and source unit ground connections.
- Check RCA cable connections and possibly replace RCA cables with a better shielded cable or reroute RCA cables away from power cables.
ALTERNATOR/ ENGINE NOISE
- This type of noise is caused by grounding issues. This can be related to the amplifier, source unit, signal processor, battery or alternator. If you can remove the signal cables from the amplifier and the noise goes away the sound is not being generated by your amplifier, but by an external grounding issue. If you can feed a signal into the amp from an external source unit and the noise is not present the sound is not being generated by your amplifier.
If you have any questions regarding setup, installation or warranty please contact the DD AUDIO® technical support team by email at service@ddaudio.com or by phone at 405-239-2800.
Customer Support
TRUE TO THE SOURCE
4025 NW 36th St., Oklahoma City, OK 73112
[405) 239-2800
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