thomann the t.amp D4-500 User manual

D4-500
digital power
amplifier
user manual

Musikhaus Thomann
Thomann GmbH
Hans-Thomann-Straße 1
96138 Burgebrach
Germany
Telephone: [phone]
E-mail: [email protected]
Internet: www.thomann.de
17.07.2015, ID: 218916 (V2)

Table of contents
1 General information................................................................................................................................. 4
1.1 Further information........................................................................................................................... 5
1.2 Notational conventions.................................................................................................................... 6
1.3 Symbols and signal words............................................................................................................... 6
2 Safety instructions..................................................................................................................................... 8
3 Features....................................................................................................................................................... 13
4 Installation and operation.................................................................................................................. 14
5 Connections and controls................................................................................................................... 15
6 Current consumption............................................................................................................................ 20
7 Technical specifications....................................................................................................................... 21
8 Plug and connection assignment.................................................................................................... 23
9 Cleaning....................................................................................................................................................... 27
10 Protecting the environment.............................................................................................................. 28
Table of contents
D4-500
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1 General information
This manual contains important instructions for the safe operation of the unit. Read and follow
the safety instructions and all other instructions. Keep the manual for future reference. Make
sure that it is available to all those using the device. If you sell the unit please make sure that
the buyer also receives this manual.
Our products are subject to a process of continuous development. Thus, they are subject to
change.
General information
digital power amplifier
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1.1 Further information
On our website (www.thomann.de) you will find lots of further information and details on the
following points:
Download This manual is also available as PDF file for you to download.
Keyword search Use the search function in the electronic version to find the topics of
interest for you quickly.
Online guides Our online guides provide detailed information on technical basics
and terms.
Personal consultation For personal consultation please contact our technical hotline.
Service If you have any problems with the device the
customer service will gladly assist you.
General information
D4-500
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1.2 Notational conventions
This manual uses the following notational conventions:
The letterings for connectors and controls are marked by square brackets and italics.
Examples: [VOLUME] control, [Mono] button.
References to other locations in this manual are identified by an arrow and the specified page
number. In the electronic version of the manual, you can click the cross-reference to jump to
the specified location.
Example: See
Ä ‘Cross-references’ on page 6.
1.3 Symbols and signal words
In this section you will find an overview of the meaning of symbols and signal words that are
used in this manual.
Letterings
Cross-references
General information
digital power amplifier
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Signal word Meaning
DANGER! This combination of symbol and signal word indicates an
immediate dangerous situation that will result in death or
serious injury if it is not avoided.
CAUTION! This combination of symbol and signal word indicates a pos‐
sible dangerous situation that can result in minor injury if it
is not avoided.
NOTICE! This combination of symbol and signal word indicates a pos‐
sible dangerous situation that can result in material and
environmental damage if it is not avoided.
Warning signs Type of danger
Warning – high-voltage.
Warning – danger zone.
General information
D4-500
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2 Safety instructions
This device amplifies electric audio frequency signals to operate passive speakers. Use the
device only as described in this user manual. Any other use or use under other operating con‐
ditions is considered to be improper and may result in personal injury or property damage. No
liability will be assumed for damages resulting from improper use.
This device may be used only by persons with sufficient physical, sensorial, and intellectual
abilities and having corresponding knowledge and experience. Other persons may use this
device only if they are supervised or instructed by a person who is responsible for their safety.
DANGER!
Danger for children
Ensure that plastic bags, packaging, etc. are disposed of properly and are not
within reach of babies and young children. Choking hazard!
Ensure that children do not detach any small parts (e.g. knobs or the like) from
the unit. They could swallow the pieces and choke!
Never let children unattended use electrical devices.
Intended use
Safety
Safety instructions
digital power amplifier
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DANGER!
Electric shock caused by high voltages inside
Within the device there are areas where high voltages may be present. Never
remove any covers.
There are no user-serviceable parts inside.
Do not use the device if covers, protectors or optical components are missing or
damaged.
DANGER!
Electric shock caused by short-circuit
Always use proper ready-made insulated mains cabling (power cord) with a pro‐
tective contact plug. Do not modify the mains cable or the plug. Failure to do so
could result in electric shock/death or fire. If in doubt, seek advice from a regis‐
tered electrician.
Safety instructions
D4-500
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CAUTION!
Possible hearing damage
The device can produce volume levels that may cause temporary or permanent
hearing impairment. Over an extended period of time, even levels that seem to
be uncritical can cause hearing damage.
Decrease the volume level immediately if you experience ringing in your ears or
hearing impairment. If this is not possible, keep a greater distance or use suffi‐
cient ear protectors.
NOTICE!
Risk of fire
Do not cover the device nor any ventilation slots. Do not place the device near
any direct heat source. Keep the device away from naked flames.
Safety instructions
digital power amplifier
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NOTICE!
Operating conditions
This device has been designed for indoor use only. To prevent damage, never
expose the device to any liquid or moisture. Avoid direct sunlight, heavy dirt, and
strong vibrations.
NOTICE!
Power supply
Before connecting the device, ensure that the input voltage (AC outlet) matches
the voltage rating of the device and that the AC outlet is protected by a residual
current circuit breaker. Failure to do so could result in damage to the device and
possibly injure the user.
Unplug the device before electrical storms occur and when it is unused for long
periods of time to reduce the risk of electric shock or fire.
Safety instructions
D4-500
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NOTICE!
Magnetic fields
The device generates strong magnetic fields that can interfere with the function
of poorly shielded devices. The strongest magnetic fields are directly above and
below the power amplifier. Therefore, never place sensitive devices such as pre-
amplifiers, radio transmission systems, or tape decks directly above or below the
power amplifier. When installing the power amplifier into a rack, you should place
it in the lowest position, and further equipment such as pre-amplifiers in the
highest position.
NOTICE!
Possible staining
The plasticiser contained in the rubber feet of this product may possibly react
with the coating of your parquet, linoleum, laminate or PVC floor and after some
time cause permanent dark stains.
In case of doubt, do not put the rubber feet directly on the floor, but use felt-pad
floor protectors or a carpet.
Safety instructions
digital power amplifier
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3 Features
nOutput power
– 4 × 500 W @ 4 W
– 4 × 250 W @ 8 W
n4 inputs, 4 outputs
nFrequency response 20 Hz to 20 kHz
n19" rackable (1 RU, installation depth 240 mm)
Features
D4-500
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4 Installation and operation
NOTICE!
Possible staining
The plasticiser contained in the rubber feet of this product may possibly react
with the coating of your parquet, linoleum, laminate or PVC floor and after some
time cause permanent dark stains.
In case of doubt, do not put the rubber feet directly on the floor, but use felt-pad
floor protectors or a carpet.
Unpack and carefully check that there is no transportation damage before using the unit. Keep
the equipment packaging. To fully protect the device against vibration, dust and moisture
during transportation or storage use the original packaging or your own packaging material
suitable for transport or storage, respectively.
Create all connections while the device is off. Use the shortest possible high-quality cables for
all connections. Take care when running the cables to prevent tripping hazards.
Installation and operation
digital power amplifier
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5 Connections and controls
Front panel
Connections and controls
D4-500
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1[ON | OFF]
Main switch to turn the device on and off.
2 LED [Power]
This LED indicates, that the unit is operational and lights up constantly as soon as the device is switched on.
3 LED [–10 dB] and [–20 dB]
These LEDs indicate the intensity of the input signal (–10 dB or –20 dB). If none of the LEDs lights up, increase the
signal level with the controls CH-A to CH-D and -if required- check the wiring.
If these LEDs are lit without an input signal is present, there is an error. In this case, disconnect the speakers from the
power amplifier and turn the controls for the input gain of channels CH-A to CH-D down to minimum. If the LEDs still
light up, the device must be inspected by an authorized service centre.
4 LED [Clip]
Overload indicator for channels CH-A to CH-D. These LEDs light up when the distortion of the output signal increases
1 %.
Connections and controls
digital power amplifier
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5 LED [Fault]
Error indication for channels CH-A to CH-D. These LEDs light up when one of the protective circuits triggers (see
Ä Chapter 7 ‘Technical specifications’ on page 21).
When turning the device on, the LEDs light up for three seconds. During this time, there is no signal present at the
output yet. Once the LEDs turn off, the device is operational.
6 LED [Thermal]
Over temperature indicator for the channels CH-A to CH-D. These LEDs light up when the respective heat sink
exceeds a certain temperature.
When turning the device on, the LEDs light up for three seconds. During this time, there is no signal present at the
output yet. Once the LEDs turn off, the device is operational.
7[CH-A …-D]
Controls for input gain of channels CH-A to CH-D.
Connections and controls
D4-500
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Rear panel
Connections and controls
digital power amplifier
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8 IEC chassis connector.
9[INPUT CH-A …-D]
Lockable combo XLR/¼-inch connectors for signal inputs.
10 [OUTPUT CH-A …-D]
Lockable NL4 mounting connectors for signal outputs.
11 [Stereo | Bridge] selector switch
Switch for operating modes ‘Stereo’ (channels operate independently of each other) and ‘Bridge’ (two channels are
interconnected to form one channel with double output).
12 [Lift | Ground] selector switch
The Ground/Lift switch allows you to interrupt the connection between the device’s protective earth terminal and
signal ground in order to prevent hum loops (Lift/unpressed state: disconnected. Ground position / switch pressed:
Earth pin and signal ground are electrically connected).
Connections and controls
D4-500
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6 Current consumption
The following table contains information on the typical current consumption depending on
the output power level (root mean square value ARMS). All values based on a 230 V mains
voltage and a 1 kHz input signal at 0 dB (sine).
Load 1/8 nominal power 1/3 nominal power
8 W(× 4) 130 W / 1,3 A 190 W / 1,9 A
4 W(× 4) 180 W / 1,6 A 420 W / 3,1 A
8 Wbridged (× 2) 190 W / 1,6 A 430 W / 3,2 A
Current consumption
digital power amplifier
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