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The reference axis lies on the
upper midrange driver axis.
DRIVERS
Bass frequencies are reproduced
by two long throw 460 mm (18")
woofers in a vented, dual chamber
configuration giving a frequency
response extending down to 17,5
Hz (-6dB), with the -3 dB point at 19
Hz.
The mid range frequencies are re-
produced by two 130 mm (5") high
sensitivity direct radiating cone
drivers and the high frequency
driver is a 25 mm (1") throat com-
pression driver, with an upper -3 dB
point at 22 kHz. The mid and high
frequency drivers have field re-
placeable diaphragms and are
mounted in a DCW.
SOFFIT MOUNTING
Soffit (flush) mounting of a loud-
speaker removes problems caused
by diffraction effects and reflec-
tions from the wall behind it:
Diffraction of sound at the loud-
speaker cabinet edges degrades
the transient response and direc-
tional properties, while reflections
will cause interference, potentially
leading to large dips in the fre-
quency response. The use of DCW
Technology reduces these effects
to a large extent and the 1036A has
versatile crossover controls to com-
pensate for variations due to
different speaker positioning. This
allows it to be used either soffit
mounted or as a free standing unit
without using external equalization,
although soffit mounting is recom-
mended.
CROSSOVER FILTERS
The active crossover network con-
sists of three parallel band pass
filters, with crossover frequencies
at 400 Hz and 3.5 kHz, and a com-
mon balanced input stage. All the
filters are aligned for equal phase
and group delay characteristics and
are acoustically complementary.
The filter slopes are 24 dB/octave.
To adjust the balance of the
drivers to suit a particular acous-
tic environment, bass, midrange
and treble controls are included,
which adjust the output in 1 dB
steps. In addition, a 15 kHz 'roll-
off' control and low frequency roll-
off and 'tilt' controls are present,
to allow further refinement of the
system response.
Calibrated
crossover
control
switches.
MUTE
disconnects
the channel
for testing.
The upper curve group shows the horizontal directivity characteristics
of 1036A in its vertical configuration measured at 2 m. The lower
curve is a 1/6 octave power response measurement, derived from
144 individual directivity measurements.
The curves above show the effect of the bass, mid and treble level
controls, 15 kHz roll-off control and the bass tilt and roll-off controls
on the free field response, measured at 2 m.
DCW TECHNOLOGY
The revolutionary Directivity Con-
trol Waveguide Technology is a
means of greatly improving the
performance of a direct radiating
multiway loudspeaker under nor-
mal listening conditions. One of
the basic ideas is to match the
performance of the drivers in terms
of both frequency response and
directivity. This results in smoother
frequency response both on and
off axis. Also, due to improved
directivity control, especially in the
midrange frequencies, more direct
sound and less reflected sound is
received at the listening position.
This gives improved stereo imag-
ing and ensures the system is less
sensitive to differing control room
acoustics than any conventional
direct radiator design. The DCW
Technology improves the drive unit
sensitivity by +2 to +6 dB thus
increasing the system maximum
sound pressure level.
The high and mid frequency
drivers are mounted in a DCW
to match their dispersion
characteristics. The DCW may
be rotated for horizontal or
vertical mounting.
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