Quantum Audio QCA4400 User Manual
Due to continuous improvement of the product the Specifications are subject to change without notice.
LIMITED WARRANTY
QUANTUM AUDIO warrants any products purchased in the
U.S.A. from an authorized QUANTUM AUDIO dealer. All products are
warranted to be free from defects in material and workmanship under
normal use and service for a period of (1) year when the unit is installed
by an authorized QUANTUM AUDIO dealer. Non-authorized dealer
installed products carry a one (1) year parts and labor limited warranty.
This warranty applies to the original purchase only.
QUANTUM AUDIO will either repair or replace (as its option)
any unit that has been found to be defective and under warranty
provided the defect occurs within:
One (1) year if purchased through an authorized QUANTUM
AUDIO dealer.
This limited warranty does not extend to units that have been
subjected to misuse, abuse, neglect, or accident. Products that in
QUANTUM AUDIO’s judgment shows evidence of having been altered,
modified, or serviced without QUANTUM AUDIO’s authorization, will be
ineligible under this warranty.
To obtain warranty service please contact your retailer or see
our web site at www.quantumaudio.net for more details.
QCA4400 QCA2500D QCA3500D
QCA4500D
COZMIK SERIES AMPLIFIERS
DB Research L.L.P.
302 Hanmore Industrial Parkway // Harlingen, TX 78550
ph: 877.787.0101 // fx: 956.421.4513 // www.quantumaudio.net
®
Instruction Manual
• Installation Instructions / Owner’s Manual •
INTRODUCTION
SAFETY PRECAUTIONS
Congratulations on your purchase of a QUANTUM AUDIO state-of-the-art power amplifier.
Your selection of a QUANTUM AUDIO car audio product indicates a true appreciation of
fine musical reproduction. Whether adding to an existing system or including your DB Drive
amplifier in a new system, you are certain to notice immediate performance benefits.
KEEP YOUR SALES RECEIPT
Take this time to attach your sales receipt to the manual and put in a safe place. In case of
any unforeseen reason this product may need warranty service, your receipt will be necessary to establish purchase date.
RECOMMENDATION
A power amplifier’s performance is only as good as its installation. Proper installation will
maximize the system’s overall performance. It is recommended that you have our product
installed by an authorized QUANTUM AUDIO retailer. However, if you decide to install it
yourself, please carefully read through this manual and take your time to do a quality installation.
Due to continuing product improvements and possible manual revisions, we recommend
checking our website for latest product information at www.quantumaudio.net.
IMPORTANT! Before making any connections, disconnect the car’s battery until the
installation is completed to avoid possible damage to the electrical system.
Fuse amplifiers power wire at the battery
Be sure to fuse the power wire within 12” of the car’s battery. This will protect the car’s
battery in case of a short circuit between the power amplifier and battery. THIS IS A MUST,
the amplifier’s built-in fuse will only protect the power amplifier not the car’s battery!
Use high grade wire connectors
To ensure maximum power transfer and secure safe connections, it is recommended to use
high grade barrier spades (for connection at amplifier) and terminal rings (for connection at
battery).
Do not run any wires underneath vehicle
Exposed wires have a chance of being cut or damaged. It is best to run all wires through the
vehicle under the carpet and/or side panels. This leads to a cleaner installation and less risk
of damage.
Use caution when mounting amplifier
Remember there are many electrical wires, gas lines, vacuum lines, brake lines as well as
a gas tank in the automobile. Make sure you now where they are when mounting the amplifier to avoid puncturing lines, shorting wires or drilling holes in the gas tank.
Run signal wires away from electrical wires
To avoid possibility of induced noise from the car’s electrical system (i.e. popping noises or
engine noise), run wires away from the car’s electrical wiring.
WARNING!
Exposure to high power sound system can cause hearing loss or damage.
Listening to your system at loud levels while driving will impair your ability
to hear traffic sounds and emergency vehicles. Use common sense when
listening to your system.
Serial # ______________ _ Model # ____
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Make all ground wires as short as possible and at the same point
In order to reduce the chance of ground loops (i.e. engine noise), make the grounding wire
as short as possible to reduce the wire’s resistance. Also, when using multiple components,
make sure all units are grounded at the same point.
Avoid sharp edges when running the wires
To avoid the possibility of power, signal or speaker shorts, be careful not to allow the amplifiers wires to come in contact with sharp edges. Use a grommet to protect the wire when
running through the fire wall.
FEATURES AND BENEFITS
Line out
DC Offset Protection
This circuit protects the output of the amplifier against DC voltage. If for some reason DC
voltage is detected at the output stage, the amplifier will shut down protecting the speakers from direct current.
Short Circuit Protection
The circuit protects the amplifier from damage due to a short found in the speakers or
wiring. If one of the speakers or its wiring comes in contact with ground, the amplifier will
shut down. To resume normal operation, correct the problem and turn the head unit off,
then back on. The amplifier will reset and play again.
Thermal Protection
To protect the amplifier circuitry against damage caused by prolonged exposure to high
temperatures, a thermal protection circuit is activated if the amplifier reaches excessively
high operating temperature. Once the thermal circuit is activated, the amplifier will shut
down to cool off. The amplifier will automatically turn back on once it cools down to a safe
operating temperature.
Power Indicator
The diagnostic L.E.D. illuminates when the amplifier is on and receiving power.
Built-in Crossover
Full range line outputs have been provided for convenient connection to additional
amplifiers in the system. The outputs are buffered to reduce signal loss. Please note that
the amplifier’s input level adjusts these level outputs.
Power Fusing
This protects the amplifier against short circuits and excessive current.
Remote Turn-on
Automatically turns amplifier on when connected to the head unit’s remote output. The
amplifier will turn on and off with the head unit to save current consumption. This control
also operates the reset circuit for the amplifier’s protection. It must be connected with the
head unit in order to reset protection circuits.
Adjustable Input Sensitivity
Allows you to fine-tune the level matching between your source and the power amplifier.
Low Impedance Stability
QCA2500D-1 Ohm Mono
QCA3500D-1 Ohm Mono
QCA4500D-1 Ohm Mono
QCA4400-2 Ohm Stereo, 4 Ohm Bridged
The “Cozmik Series” amplifiers include a built-in variable crossovers. The crossover
features a variable frequency selection for precise low pass filtering for the QCA2500D,
QCA3500D and QCA4500D. The QCA4400 also offers the same frequency selection with
the option of low or high pass filtering.
Power and Speaker Distribution Blocks
Heavy gauge bare wire distribution blocks are provided for maximum power and signal
transfer with minimal resistance.
Bass Boost (QCA2500D QCA3500D QCA4500D)
For added low frequency performance the amplifiers are equipped with a variable *0~18
dB bass boost @ 45Hz.
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