thomann D3400 User manual

D3400
digital power
amplifier
user manual

Musikhaus Thomann e.K.
Treppendorf 30
96138 Burgebrach
Germany
Telephone: [phone]
email: [email protected]
Internet: www.thomann.de
18.11.2011

Table of contents
1 General notes............................................................................................................................................... 4
2 Safety instructions..................................................................................................................................... 7
3 Installation and start up....................................................................................................................... 12
4 Connectors and operating elements............................................................................................. 16
5 Technical specifications....................................................................................................................... 23
6 Protecting the environment.............................................................................................................. 25
Table of contents
D3400
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1 General notes
This user manual contains important information on the safe operation of the device. Read and
follow all safety notes and all instructions. Save this manual for future reference. Make sure
that it is available to all persons using this device. If you sell the device to another user, be sure
that they also receive this manual.
Our products are subject to a process of continuous development. We therefore reserve the
right to make changes without notice.
This section gives an overview of the symbols and signal words used in this user manual.Symbols and signal words
General notes
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 possible dangerous situation that
can result in minor injury if it is not avoided.
NOTICE! This combination of symbol and signal word
indicates a possible dangerous situation that
can result in material and environmental
damage if it is not avoided.
Warning signs Type of danger
Warning – high-voltage.
General notes
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Warning signs Type of danger
Warning – danger zone.
General notes
digital power amplifier
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2 Safety instructions
This device amplifies electric audiofrequency 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
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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.
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
digital power amplifier
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CAUTION!
Possible hearing damage
With loudspeakers or headphones connected, the device can produce volume
levels that may cause temporary or permanent hearing impairment.
Do not operate the device permanently at a high volume level. Decrease the
volume level immediately if you experience ringing in your ears or hearing
impairment.
NOTICE!
Risk of fire
Do not block areas of ventilation. Do not install the device near any direct heat
source. Keep the device away from naked flames.
Safety instructions
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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
digital power amplifier
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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.
Safety instructions
D3400
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3 Installation and start up
Unpack and check carefully there is no transportation damage before using the unit.
Establish all connections as long as the unit is switched off. Use the shortest possible high-
quality cables for all connections.
DANGER!
Electric shock caused by high voltages at the power amplifier output
The output voltages of modern high-performance amplifiers may result in death
or serious injury.
Never touch the bare ends of loudspeaker cables when the amplifier is on.
Installation and start up
digital power amplifier
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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.
To avoid damage by overheating you have to ensure good venting by keeping the following
minimum space around the unit:
non both sides: 5 cm
nabove: 10 cm
nbehind: 10 cm
Necessary distances
Installation and start up
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The unit has been designed for rack mounting in a standard 19-inch rack; it occupies one rack
unit.
The unit offers balanced XLR/1/4" combo jacks for signal inputs and XLR mounting plugs for
signal outputs. Please note the following illustration and table for pin assignment.
1 Ground
2 Signal (+)
3 Signal (–)
Please note the following illustration and table for 1/4" TS jack pin assignment.
Rack mounting
XLR connectors for signal input
and output
1/4" jack for signal inputs
Installation and start up
digital power amplifier
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1 Signal
2 Ground
The illustration to the left shows the lockable speakON mounting socket.speakON plugs for speaker con‐
nectors
Installation and start up
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4 Connectors and operating elements
Front view
Connectors and operating elements
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To switch the unit on and off.
Rear view
Power switch (1)
Connectors and operating elements
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These LEDs light up for 3 seconds after the unit is switched on. After that the unit is ready for
use. If these LEDs light up during operation, the protection circuit is activated in the respective
channel. These circuits protect the unit against overheating and the speakers against direct
current.
As long as the LED lights up, the speaker output of that channel is disconnected.
When the unit is operable again or the defect was corrected, the LED goes out and the speaker
output of the respective channel is reconnected.
These LEDs light up, if the distortion in the respective channel exceeds 1 %. This indicates over‐
loading (clipping) due to excessive input level.
"Fault" LEDs (2)
"Clip" LEDs (3)
Connectors and operating elements
digital power amplifier
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These three LEDs per channel show the output level.
The "Signal" LED lights up, when the unit outputs a signal. The "–20" LED indicates an output
level above –20 dB. The "–10" LED indicates an output level above –10 dB.
If these LEDs light up, although no input signal is present, an error has occurred. Then turn the
volume control of the respective channel all down and disconnect the signal input. If the LEDs
continue to light, the unit might have been damaged.
Use these controls to adjust the output level for the respective channel. The scale inscription
indicates the damping of the output signal, from infinite (no output) to zero (full power). Set‐
tings below –14 should be avoided in practice, because then the amp is not working in the
optimum dynamic range (headroom).
These LEDs light up, when the unit is switched on. If they are not lit, although the power switch
is in ON position, check the voltage supply.
"Signal" LEDs, "–20", "–10" (4)
Volume control (5)
"Power" LEDs (6)
Connectors and operating elements
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This LED lights up, when the internal temperature is too high. Then an automatic protection
circuit reduces the output power. If the temperature keeps rising, the amp will automatically
power down. In this case the "Fault" LEDs (2) light up.
Mounting socket for lockable speakON connectors.
Balanced XLR/1/4" combo jacks for left and right input channel. Here you can connect both
balanced signals (using XLR plugs) or unbalanced signals (using 1/4" TS plugs).
Some mixing consoles provide unbalanced signals to XLR outputs. In this case pin 3 should be
bridged to pin 1 or remain unwired.
"Thermal" LED (7)
Speaker outputs left/right (8)
Signal inputs left/right (9)
Connectors and operating elements
digital power amplifier
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