Bose 802-II User Manual

3
TECHNICAL DESCRIPTIONS
802
Series" and 802W Series II
The BOSER 802-11 and 802W-1I Articulat-
ed ArrayR systems are full-range equal-
ized loudspeakers designed for high-quality
reinforcement of voices and music. The
802-11 speaker is ideal for applications re-
quiring a rugged, portable enclosure, while
the 802W-11 speaker is intended for use in
permanent indoor sound system installations.
The acoustic properties of the 802-11 and
802W-1I
systems are identical.
Both weakers employ eight (8) 4V2" (11.4 cm)
BOSE 0-11 B
full-range drivers, mounted
symmetrically in vertical pairs on a faceted
Articulated Array baffle assembly. The dri-
vers feature low-impedance, edge-wound alu-
minium voice coils, 12-ounce Ferrite V cer-
amic magnets, molded polyester frames and
advanced cone and motor systems for high
linear
excursion and power output capabil-
ities.
Tuned Reactive Air Columns reduce distor-
tion by controlling the cone excursion re-
quired to reproduce deep bass frequencies.
A built-in Directivity Control circuit (see
Fig. I) maintains the vertical dispersion pat-
tern through the high-frequency range and
also protects the drivers from the effects of
high-frequency overload.
The 802-11 speaker enclosure is composed of
polyethylene copolymer structural foam, re-
inforced with 10% mica for improved dura-
bility and impact strength.
The 802W-1I speaker enclosure is laminated
with an acrylic-coated walnut-grained vinyl
that can be painted to match special color
requirements. The complete 802W-1I baffle
assembly can be easily removed from the
wood cabinet to facilitate the installation of
mounting hardware.
802-C System Controller
The 802-C System Controller is a sophisti-
cated signal processing device which com-
bines the functions of the three equalizers,
an automatic switching circuit, and an elec-
tronic crossover. The 802-C automatically
selects the proper crossover function and
equalization curve for a given system appli-
cation through use of a switching network
operating in conjunction with the unit's out-
put jacks. In addition to signal routing based
on equalization requirements, the switching
network indicates mode of operation on its
front panel. Also included on the front pan-
el are high-cut and low-cut switches which
decrease the line output by 4dB at 55Hz and
by
10dB at 16kHz. Sharp subsonic and ultra-
sonic band-limiting filters reduce power
waste, stage noise, high-frequency instabil-
ity, and interference. The 802-C fits into
one
space of a standard 19" equipment rack
with the optional RMK-8 Rack Mount Kit.
302
Tandem- Tuned™ Bass System
The 302 T andem- Tuned Bass System incor-
porates an innovative transducer loading sys-
tem that takes full advantage of the energy
being radiated by both the front and rear of
the transducer. Each of the two (2) 12"
(30cm) LF-88-A low-frequency transducers
is loaded by two subenclosures of dlfferent
volumes, resulting in two tunings for fhe sys-
tem, 55Hz and 110Hz. The resulting res-
ponse is smooth throughout the passband of
the speaker.
In the passive mode of operation, the inter-
nal crossover of the 302 system automati-
cally presents proper impedance to the amp-
lifier. This impedance is maintained when
the unit is used alone or with one or two 802
speakers.
The 302 cabinet is constructed of impreg-
nated resin board with uniformity charac-
teristics superior to those of particle board
or plywood. Corners are molded for stack-
ing, and recessed handles are built into the
sides of the cabinet. Stacking grooves on
the cabinet top accept the matching ridges
which
are molded into all BOSE 802 speak-
ers.
DIRECTIVITY CONTROL CIRCUIT
o I
FIG. J
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Bose 802-II Specifications

General

Brand	Bose
Model	802-II
Category	Speakers
Language	English