dB Technologies SUB 15D Bedienungsanleitung Seite 6

DESCRIPTION
The "SUB D" series speakers are equipped with DIGIPRO series class D amplifier.
These high-efficiency amplifiers deliver high output power in a compact size and low
weight. Thanks to its high efficiency, the cooling of the amplifier module is obtained
statically, thus avoiding the use of a fan.
The power supply circuit of the DIGIPRO amplifier, assembled on SUB 15D speaker, has
been designed to work according to power supply voltage and to the SMPS (Switched-
Mode Power Supplies) technology.
The power supply circuits of the DIGIPRO amplifier, assembled on SUB 18D, has been
designed to work in full-range mode; thanks to the SMPS (Switched-Mode Power Supplies)
technology with PFC (Power Factor Correction) the operation with supply voltages between
100 Vac and 240Vac is guaranteed by ensuring the same sound performances even with
floating and non-stabilized power supply systems.
SUB D is a series of active subwoofers made of birch wood, designed for medium to large
size rooms. The subwoofer speaker is made using "BAND PASS" so that high sound
pressures can be achieved in compact dimensions.
For easy use, installation and transport, all subwoofers are provided with:
- handles on sides
- standard (M20) pole mount plate
- top part of the box features recesses for making it easier to superimpose the
FLEXSYS series tops or another subwoofer.
- wheels predisposition (only SUB 18D)
The speakers are active sub-woofers designed to function in stereo and in mono modes. It
is possible to set crossover frequency (90Hz or 120Hz) and turning of phase (0° or 180°).
The output signals can be linked or controller by X-OVER output.
CHARACTERISTICS
Cooling
The amplifier is cooled by means of the aluminium panel placed on the back of the speaker.
The thermal protection is ensured by an internal circuit which controls the temperature of
the amplifier and protects this against any risk of overheating thus limiting the general
volume ( temperature >70°C).
If the temperature reaches the maximum operating temperature (>80°C), the audio signal
is set to the "MUTE" position and it will be indicated by the switching on of the yellow
"MUTE" LED.
The requiriered volume and all functions will be restored automatically when the normal
operating temperatures are reached.
Protection
When the yellow "MUTE" LED turns on, it means that a malfunction has been detected on
the speaker, thus setting this to the mute position.
Perform the checks listed below:
- Check if the speaker is properly connected to the power supply.
- Make sure that the power supply is of correct voltage.
- Check that the amplifier is not overheated.
- Disconnect the speaker from the mains power supply, wait for a few minutes and
connect it again.
If after these tests the yellow "MUTE" LED is still on, please contact an authorised service
centre.
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CONNECTIONS
Connecting to the mains supply
Each active speaker features its own power cable. Connection is done by a Neutrik
POWER CON® (blue) model which permits easy and fast connection to the speaker as
well as being an excellent locking system.
The same connector serves as a switch to turn ON and OFF the active loudspeaker by
turning the connector to the left (OFF) or right (ON).
The active speaker must be connected to a power supply able to deliver the maximum
required power.
Main power supply linking
On the rear of the speaker, a Neutrik POWER CON® connector (grey) offers linking the
mains power supply.
This socket links the power supply to another speaker, thereby reducing the direct
connections to the mains. Maximum amplifier input power is shown on the amplifier panel.
The maximum number of speakers connected together varies of max input power and of
the maximum allowed current of the first power socket.
LOUDSPEAKER INSTALLATION
WARNING
Make sure that the loudspeaker is securely installed in a stable position to avoid any
injuries or damages to persons or property.
For safety reasons do not place one loudspeaker on top of another without proper fastening
systems.
If you use the loudspeakers outdoors avoid places that are exposed to bad weather.
The loudspeaker is supplied by the manufacturer company for use in support
WARNING
Never use the handles to hang the speaker!
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