Bose 301 Sonata Owner's Manual - Page 4
Browse online or download pdf Owner's Manual for Speakers Bose 301 Sonata. Bose 301 Sonata 12 pages. Direct/reflecting speaker system
Also for Bose 301 Sonata: Owner's Manual (13 pages), Owner's Manual (9 pages)
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1. INTRODUCTION
Thank
you
for purchasing
the BOSE
Model
301
Direct/Reflecting®
speaker system.
Your Model
301s are the product of many years of
BOSE
research
and dedication to the art of bringing superb musical
reproduction into your home.
PLEASE TAKE TIME TO READ
THIS MANUAL
CAREFULLY.
It will
help you obtain the full benefits of the Model 301's unique design.
2. UNPACKING INSTRUCTIONS
Two
Model
301
speakers,
marked
"Part
1"
and
"Part
2,"
are
packed
in a single
shipping
carton.
Unpack
both
speakers
care-
fully, saving
the
carton
and
packing
materials
for possible
trans-
portation or shipment at a later date.
If either of the speakers
has visible
damage
when
you
unpack
it,
do
not
place
the
damaged
speaker(s)
in operation.
Repack
the
speaker(s)
in
the
original
carton
with
the
complete
packing
material and notify your dealer immediately.
WARNING
—
DO
NOT
HANDLE
THE
SPEAKERS
BY THE
FOAM
GRILLE.
GRASP
ONLY
THE
CABINET
WHEN
MOVING
OR
PLACING THE SPEAKER.
3. DESIGN FEATURES
The
BOSE
Model
301
Direct/Reflecting
loudspeaker
incorporates
several
features
that
make
its operation
and
placement
different
from
other
loudspeakers.
The
exceptional
performance
of
the
Model
301,
to a great
degree,
can
be attributed
to Asymmetrical
Design, the Direct Energy Control, and a Dual Frequency
Crossover
Network.
ASYMMETRICAL
DESIGN
The
Asymmetrical
Design
of the
Model 301 provides a high proportion of reflected sound at high
frequencies and contributes to the exceptionally spacious stereo-
phonic
reproduction.
To provide
balanced
spatial properties
in
stereo
reproduction,
the Model
301
stereo
pair is designed
so
that the speaker
used
on the left-hand
side of the room
(this
speaker is called "Part 1") is a mirror image of the speaker on the
right-hand side (this speaker is called "Part 2").
The Asymmetrical
Design
and mirror image construction
of the
Model 301 are shown
in Diagram
1 (page 5). The tweeters direct
most of their energy toward the side walls of the room. The side
walls
reflect
high
frequency
energy
uniformly
throughout
the
listening area, resulting in a stereo image extending from one wall
of the room
to the other (Diagram
2, page6). The advantage of
this design is that minimum
reliance is placed on the rear wall of
the room
for providing reflections. This maximizes the flexibility
of placement of the loudspeaker.
DIRECT
ENERGY
CONTROL
This control, located at the top of
the cabinet, allows you to select the proportion of direct to re-
flected sound at high frequencies to produce the optimum spatial
characteristics for your particular room.
If, for example, the side walls of the room are absent, too far away,
or covered by absorbing material, ' the control can be set to provide
predominantly direct sound at high frequencies. A predominance of
direct sound results in a stereo localization of sounds primarily to
the area between
the two speakers.
Sometimes
this more
"inti-
mate" sound is preferred for soloists and small groups.
If a reflecting side wall is present, and a more
spacious sound
presentation is desired (such as for an orchestra), the control can
be set to provide a larger proportion of reflected sound
at high
frequencies.
This results in sound that actually extends
beyond
the spacing of the speakers.
DUAL FREQUENCY CROSSOVER NETWORK
Contrary to tradi-
tional design
philosophies,
the crossover
network
of the Model
301 deliberately overlaps the response of the woofer and tweeter
by over an octave, and adjusts the amplitude and phase response
of the woofer
and
tweeter
to provide
exactly
complementary
*Any
surface
that feels
hard, such
as wood,
glass, wallboard,
plaster or brick,
is a good
reflector. A soft surface, such
as
acoustic tile, drapery, or upholstered furniture, will absorb sound.