dB Technologies L80D, Руководство пользователя

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5
ENGLISH
DESCRIPTION
The speakers in this series use a latest generation digital amplifier.
This highly efficient amplifier provides high power with limited weight and dimension. Thanks to the
low power dissipated, the cooling of the amplifier module does not require a fan.
The digital preamplifier with DSP (Digital Signal Processing) controls the audio crossover of the
acoustic components, the frequency response, the limiter, and the phase alignment.
The correct switch on of the amplifier is guaranteed by an initialization procedure; during this test
stage the LEDs (“LIMITER” and “ON/SIGNAL”), located on the amplifier module, stay on together
for approx. 2 sec.
At the end of the switch on procedure, on the amplifier module, the “ON/SIGNAL” green LED
flashes slowly, when there is signal absence.
During normal operation the “ON/SIGNAL” green LED serves as Vu-meter monitoring the audio
level reproduced.
The "LIMITER" red LED lights up to indicate that the internal limiter circuit has tripped to prevent
amplifier distortion and protects the speakers against overloads.
Thermal control is provided by the internal DSP, by means of one sensor, controls the temperature
of the amplifier, avoiding overheating by limiting the overall volume.
In case of overheating (> 90°C) the volume decreases proportionally to the temperature increase,
making the change unnoticeable.
The correct volume and all the functions are automatically restored when standard operating
temperatures are reached.
L80D
The active speaker L80D is equipped with an amplifier capable of
delivering a power of 80W.
The speaker is equipped with a 4" woofer with dome tweeter (coaxial -
voice coil 1”) and 4” woofer (voice coil 1”)
The speaker case is made of plastic material
The M5 threaded holes on the side and the bottom allow the possibility to
use the speaker attached to a bracket.
It is also designed for use in rest position as a monitor (with an angle of
45°)
L160D
The active speaker L160D is equipped with an amplifier capable of
delivering a power of 160W.
The speaker is equipped with a 5" woofer with dome tweeter (coaxial -
voice coil 1”) and 5” woofer (voice coil 1”)
The speaker case is made of plastic materials and is equipped with a
recessed handle in the back that makes it easy to transport.
The M5 threaded holes on the side and the bottom allow the possibility
to use the speaker attached to a bracket.
It is also designed for use in rest position as a monitor (with an angle of
60°)