DS18 SQ82A Amplified 8 Inch Car Audio Subwoofer Owner’s Manual
- June 5, 2024
- DS18
Table of Contents
Amplified 8 Inch Car Audio Subwoofer
Owner’s Manual
8″ ACTIVE SUBWOOFER WITH ALUMINUM ENCLOSURE
OWNER’S MANUAL
FEATURES
- Very Strong Aluminum Box for better sound, heat dissipation and lightweight construction.
- High-Efficiency Digital Amplifier Built-In.
- Auto Turn-On Function when using Hi-Level Input for easier installation.
- Remote Level Knob to get an easy amount of Bass control.
- Passive Radiator Design for deeper and louder sound output in a smaller enclosure.
Professional installation by an authorized DS18 dealer is highly
recommended!
Otherwise, the performance of your new gear may not be satisfactory. In the
event that you decide to do your own installation, please read and follow this
manual carefully. Failure to do so may compromise the integrity of this
product, and your automobile, and possibly void the product warranty.
Secure the subwoofer box with a strap or bracket to screw it down in case this
box is loose on your trunk or an SUV cargo area to avoid this moving around
which will damage the Subwoofer or box itself. In case of accelerating or hard
braking, this will reduce the possibility of movement! Major injuries may
occur in case of an accident if this is not secured properly.
If you already have installed the amplifier, then follow these simple
steps:
- Turn on the Head Unit and play some music
- Now you are ready to play it for the first time. It is best to leave the gain all the way down at the start. Now, start with the head until the volume is low and work your way up.
- Now you can tune the amp. We recommend using the Low Pass Filter at 120Hz or lower depending on your system.
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.
That’s it! You are done
Now have fun!!
GENERAL SPECIFICATIONS
Speaker Type / Size …………………… 8″ Active + 8″ Passive/ 203.2 mm + 203.2 mm
Total Impedance………………………………2 OHMS
Total RMS Power Handling……………………………. 300 Watts
Total MAX Power Handling…………………………………. 1200 Watts
Total Sensitivity (1w/1m) ………………………………………….83 dB
Frequency Response …………………………… 30 – 350 Hz
SPEAKER SPECIFICATIONS
Voice Coil Diameter……………………….. 1.52″ / 38.6 mm
Voice Coil Former Material ………………………… Aluminum
Winding Material………………………………………..Copper
Material………………………………………..Non-Pressed Paper
Dust Cap Material…………………………………… Paper
Surround Material ……………………………………. Rubber
Basket Material …………………………………….. Steel
Magnet Weight…………………………….. 32 Oz / 914 g
AMPLIFIER SPECIFICATIONS
Amplifier Class…………………………..Class D
Amplifier Type………………………. Subwoofer Monoblock
Number of Channels …………………………………………. 1
Minimum Impedance………………………………….. 2 OHM
BOX SPECIFICATIONS
Internal Volume………………………………………. 10.8 L / 0.38 ft3
Box Tune ………………………………Fb…………………………………50 Hz
Box Type ……………………………………….Passive Active (Sealed)
Box Material…………………………………. Aluminum
Finish Material…………………………………… Anodic Black
-3 DB Dropping Point……………………..F3………………….35 Hz
MEASUREMENT
Overall Height ………………………………… 9”/ 230 mm
Overall Width ………………………………….. 9”/ 230 mm
Overall Depth ……………………………….12” / 304 mm
INSTRUCTIONS FOR FUNCTIONS AND CONTROLS
-
REMOTE CONTROLLER OUTLET
To be connected with the remote controller, which helps to boost the gain.
Please turn the knob of volume to be maximum before using the remote. -
BOOST: The boost ranges from 0dB to 12dB.
-
PHASE: Phase adjusting switch, the phase ranges from 0°-180° degrees.
-
LPF: Low pass frequency adjusting knob, the frequency ranges from 30Hz to 150Hz.
-
LEVEL: Knob for volume adjustment.
-
LOW-LEVEL INPUTS
Low-level inputs are the recommended way to introduce the audio signal to the subwoofer if RCA outputs are present on your head unit or other signal source (such as a sound processor). -
+12V: Anode of power connection terminals. Connect to the anode of the car battery.
REM: Terminal to be connected with Remote cable, which comes from the source and which controls the amplifier switching on. The applied voltage must be between 10 and 15 VDC.
GND: Ground terminal. Connect to the car chassis. Keep the lenght of the ground cable to a minimum. -
FUSE: Standard automatic fuse, you must use the same power fuse if you need to change it.
-
PROTECTION / POWER INDICATOR
source of the subwoofer. -
HIGH-LEVEL (SPEAKER LEVEL)INPUTS
If your head unit does not have RCA outputs you can use the speaker outputs for the audio source of the subwoofer.
Use the supplied cable and wire harness and connect the outputs properly as shown in the connection diagram in this manual -
REMOTE CONTROLLER : Volume level knob, the gain ranges from 0.1V to +3.5V
WIRING DIAGRAM
TROUBLESHOOTING
If you experience operation or performance problems with this product compare
your installation with the electrical wiring diagram on the previous pages. If
problems persist, read the following troubleshooting tips which may help
eliminate the problems.
The amplifier will not power up.
Check that the remote input (turn-on) has at least 5VDC.
Check to make sure you have a good ground connection.
Check that there is battery power in the (4) terminal. Check that there is at
least 12V
Check all fuses, and replace if necessary.
Make sure that the protection LED is not illuminated.
If it is lit shut off the amplifier briefly. and then repower it.
Protection LED comes on when the amplifier is powered up.
Check for short circuits on speaker leads.
Turn down the volume control on the head unit to prevent overdriving.
Remote speaker leads, and reset the amplifier, If the protection LED still
comes on, then the amplifier is faulty and needs servicing.
No output.
Check that all fuses are OK.
Check that unit is properly grounded.
Check that the remote input (turn-on) has at least 5VDC.
Check that all RCA audio cables are plugged into the proper inputs.
Check all speaker wiring. High Hiss in the sound. Disconnect all RCA inputs to
the power sub’s control panel.
If the hiss disappears. then plug in the component driving the amplifier and
unplug its input
If the hiss disappears at this point go on until the faulty/noisy component is
found.
It is best to set the amplifier’s input level control as low as possible.
The best subjective signal-to-noise ratio is achieved in this matter, try to
set the head unit as high as possible (without distortion) and the amp input
level as low as possible.
Low output.
Reset the level control. Check the crossover control settings.
The squealing noise is present.
Check for improperly grounded RCA interconnects.
Distorted sounds.
Check that the input level control is set to match the signal level of the
head unit. Always try to set the input level as low as possible. Check that
all crossover frequencies are properly set. Check for short circuits on the
speaker leads.
Amplifier gets very hot.
Check that there is good air circulation around the amp. In some applications.
it may be necessary to add an external cooling fan.
Engine noise (static type).
This is usually caused by poor quality RCA cables, which can pick up radiated
noise. Use only the best quality cables. And route them away from power cables
Engine noise (alternator whine).
Check that the RCA grounds are not shorted to the vehicle chassis.
Check that the head unit is properly grounded.
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