PL-AUDIO D6K4 User manual

D 6 K 4 D 10 K 4 D 14 K 2
Before using the amplifiers, be sure to read the USER MAMUAL carefully. Please keep this
USER MANUAL for future reference.
NOTE
Warning: The inside of the product shell has non-insulated dangerous
voltage, which produces a electric shock to the body, so the amplifier must
be connected to a grounded socket outlet.
Power amplifiers are capable of producing hazardous output voltages. To avoid electrical shock, do
not touch any exposed speaker wiring while the amplifier is operating. The external wiring
connected to the speaker terminals shall be installed by a qualified instructed person or ready-
made leads or cords of appropriate capacity shall be used. In addition, the speaker terminal
should be covered with productive cover complying with the security operations and
requirements of the electrical products.
The amplifier is very powerful and can be potentially dangerous to both loudspeakers and humans
alike. Many loudspeakers can be easily damaged or destroyed by overpowering them. Always
check the speaker's continuous and peak power capabilities. Although the amplifier's attenuators
can be used to reduce the overall gain, an increase of the input signal can result in full output
power, which may cause damage to connected speakers.
The device will emit radio frequency energy. So this product uses radio frequency energy and if not
used or installed in accordance with these operating instructions, may cause interference to
other equipment, such as radio and TV receivers. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or TV reception, which can be determined by turning the equipment on
and off,
The user is encouraged to try to correct the interference by one or more of the following
measures:
▲ Reorient or relocate the antenna.
▲ Increase the separation between the equipment and receiver.
▲ Connect the equipment to an outlet on a circuit different from that to which the receiver is
Connected.
▲ Consult the dealer or an experienced radio or TV technician for help.
Do not remove top or bottom covers. Removal of the covers will expose hazardous voltages.
The user can not repair the internal parts, please contact with the qualified professional person
for help.
USER MANUAL
NOTE
NOTE
NOTE

To avoid risk of fire or electric shock, please do not expose this apparatus to rain or moisture. For safe
and reliable operation, the dust covers behind the front panel should be cleaned regularly. If the
dust filters are not maintained there will be safety risks. For example the unit can ignite the dust
and fire will occur due to high internal temperatures. There is also risk that the unit will
malfunction since it is dependent on constant airflow not clean and the unit malfunctions, any
resultant problems will not be covered by the warranty.
1
Introduction
Thank you for choosing our power amplifiers. We are confident that you will be pleased with the
performance, configuration flexibility and reliability.
This manual provides a comprehensive guide to the features and functionality of D-Serie Amps power
amplifiers. Please read through it to become fully acquainted with the many configuration options and multiple
layers of protection circuitry.
Main Features
D - Serie amplifiers incorporate a number of sophisticated technologies (many of them to ensure the
best possible operaion ). Familiarizing yourself with these technologies will prove invaluable in
setting up and optimizing your loudspeaker system.
Voltage Peak Limiter (VPL)
The Voltage Peak Limiter (VPL) feature allows user adjustments that determine maximum voltage output, thus
matching the amplifier to the connected speaker load.
Protection and performance optimization
Appropriate and reliable power amplification is vital to any audio system. Inadequate or faulty power
amplification could cause damage to the Loudspeakers, or in some cases to the power amplifiers themselves.
To prevent any damage or costly service interruptions, D - Serie amplifiers offer advanced features to protect
both internal circuits and any connected loads. These features even protect mains fuse that, in extreme cases,
could be overloaded.
Following are short descriptions of standard built-in protection features:
▲ CPL(Current Peak Limiter)ensures that the amplifier's output does not exceed the safe current
handling parameters of amplifier components.
▲ Temperature protection ensures that the amplifier will not be damaged by exceeding thermal limits.
▲VHF(Very High Frequency) protection circuits mute the output of the amplifier when nondynamic
continuous signals above 10 kHz are detected.
▲DC protection ensures destructive DC signals will not appear at the amplifier outputs. If such
conditions occur an internal fuse opens and fault indication is displayed.
▲Low-impedance (short circuit) protection provides a fault warning indication and shuts down the
output stage when, for example, an input signal is present and a malfunctioning cable or driver is short
circuiting the output.
▲High-impedance warning reports an alert when, at the same time, output signal is high and no
current draw is measured. This situation might occur when no speakers are connected, or when a
driver is blown.

▲Low inrush current ensures that the mains breaker will not trip when several power amplifiers are
turned on simultaneously.
2
Mounting
Unpacking
Carefully open the shipping carton and check for any noticeable damage. Every amplifier is tested and inspected
before leaving the factory and should arrive in perfect condition. If any damage is discovered, please notify the
shipping company immediately. Only the consignee may institute a claim with the carrier for damage incurred
during shipping. Save the carton and packing materials for the carrier's inspection.
Mounting
Free airflow from front-to-rear of the amplifier must be possible. Therefore, no doors or rack-lids should be
mounted in front of or behind the amplifiers.
Amplifiers may be stacked directly on top of each other. There is no need for spacing in between units, though this
might enable more convenient installation of cabling on the rear panel.
It is recommended that rear supports be mounted for maximum long-term stability. Rear support brackets are
included.
Cooling
The amplifier uses a forced-air cooling system with air flow from front to rear, maintaining a low operating
temperature within defined limits. Front-to-rear airflow is preferred as cooler air is present at the front in nearly
all applications. Never attempt to reverse the airflow.
Make sure that there is an adequate air supply in front of the amplifier, and that the rear of the amplifier has
sufficient space to allow the exhaust to escape. If the amplifier is rack-mounted, do not use covers or doors on the
front or rear of the rack.
Should a heat sink overheat, the temperature sensing circuits will mute the overheating channel. If the power
supply overheats, another sensing circuit will mute all output channels until the power supply cools to safe
operating temperature.
Always make sure that the dust-filters behind the detachable front panel are clean to ensure maximum 。
possible airflow.
NOTE
Operating Voltage
1、The label placed to the right of the mains cable on the rear of the amplifier indicates the AC mains voltage for
which the amplifier is wired and approved: 110 V or 220 V. Connect the power cable only to the AC source type
referred to on the label. The warranty will not cover damage caused by connecting to an incorrect type of AC
mains.

2、The power amplifiers use primary switching. Because the mains power is rectified directly in front of the
transformer, the amplifier is insensitive to mains frequency. It may be connected to 50 or 60 Hz sources,and
actually will operate on line frequencies from DC to 400 Hz.
3、If the power plug mounted at the factory is not appropriate for your country, it can be removed and the proper
connector wired in its place.
4、If you are not 100% confident of your competence to replace the mains plug, engage qualified personnel to do
the job.
5、Once a suitable AC supply is connected, the amplifier can be turned on using the front
panel power switch.The amplifier then goes through a soft-start sequence as it self-checks
its circuits. The fans will blow at high speed before dropping to idle, and the power LED
will illuminate.
6、There is no ground lift switch or terminal on the amplifiers. The signal ground is always floating, via a resistor,
to chassis and therefore the grounding system is automatic.
7、In the interests of safety, never disconnect the earth (ground) pin on the AC power cord.
3
Front-Panel Overview
LED above the switch illuminates, it indicates the power is ON. When VPL or CPL indicators are not illuminated, and the VPL DIP-switches Conversely, when the green LED
doesn t illuminate, it means the are set to maximum at the specified load, theamplifier channels are able power is OFF. to deliver maximum and rated output power.
PWR-Power on(Blue)

The amplifier should never be operated MUTE-Channel mutes due to a fault condition(Red) without the dust-
filters in place.VPL-Voltage Peak Limiter(VPL) active
SIG-Signal levels -40dB(sig) to -4 dB
Front
Panel
LED
Field
HI-IMP-High impedance/open
load detected
TEM-Temperature mute(Yellow
constant)
VHF-Very High Frequency protection active(output mute)(Red constant)
CPL-Current Peak Limiter(CPL) active(Red flashing)
or Low impedance/short circuit fault detected(Red constant with output muted)
BRIDGE-Output in bridge mode
PARALLEL-Input in parallel mode

Rear-Panel Overview
Rear Panel for 4-Channel Amplifier

Voltage Peak Limiter(VPL) Settings

Input an
d Output Connections(4-Channel)

Input and Output Connections(2-Channel)

Bridge Mode

Technical Specifications
Model
D 6 K 4
D 10 K 4
D 14 K 2
8ΩStereo Power
4 x 750 W
4ΩStereo Power
2ΩStereo Power
8ΩBridged Power
4ΩBridged Power
Frequency Response
Input Impedance
20KΩBalanced,10KΩUnbalanced
THD+N
(Rated power,4Ω/1KHz)
S/N Ratio
Damping Factor
Protection
Short Circuit, DC Voltage, Thermal, VHF, Current Inrush, Turn-
On/Off transient, Open Circuit
Operating Voltage
Dimensions(HWD)
mm

Packing Dimensions(HWD)
mm
Net Weight(kgs)
Gross Weight(kgs)
*Specifications subject to change without notice.