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DESCRIPTION
SUB28D, SUBI 2D, SUB05D and SUB808D sub-woofer speakers are realized with Hybrid
Enclosure Technology (H.E.T.), developed by the dB Technologies labs.
The box in fact is made in light multilayer wood, coated in PVC and the sides are in
polypropylene.
The speakers of "SUB D" H.E.T. series use multichannel digital power amplifiers of last
generation DIGIPACK.
These highly efficient amplifiers provide 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
E
audio level riproduced.
The "LIMITER" red LED lights up to indicate that the intemal limiter circuit has tripped to
prevent amplifierdistortion and protects the speakers against overloads.
o
SUB D (H.E.T.) are active sub-woofers designed for medium to large size rooms; are made
using "BAND PASS" so that high sound pressures can be achieved in compact dimensions.
These speakers are designed to function in stereo and in mono modes. It is possible to set
the frequency response and tuming of phase (00 or 1800).The output signals can be linked
or controlled by X-OVER output.
For easy use, installation and transport, all subwoofers are provided with:
2 plastic handles on sides,
standard (D.36mm) pole mount plate on top of box.
SUB
28D
HANDLE
WOOFERS
SUB
05D
ø 36mm PEDESTAL/
BRACKET
, HANDLE
WOOFER
5
ø 36mm PEDESTAL]
BRACKET
HOUSING
AMPLIFIER
AMPLIFIER
HOUSING
.o
HANDLE
SUB
12D
ø 36mrn PEDESTALI
BRACKET
HANDLE
o.
SUB 808D
ø 36mrn PEDESTAL/
II
BRACKET
HOUSING
HANDLE
II
WOOFER
HOUSING
AMPLIFIER
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