ABOUT THE
PIONEER R-SERIES
With the new
R-series, Pioneer introduces a new concept in speaker system design: the
individualistic speaker. Even at the first glance, these speakers look
different, with their two-part front grilles and powerful-looking, massive
enclosures. But connect a pair of Pioneer R-series speakers to a good stereo
amplifier, play a pro$am of rock, jazz or folk music, and you'll realize that
these speakers are different. We've designed them with the emphasis on impact
and richness rather than on laboratory data.
That's what
makes Pioneer R-series speakers so ideally suited for modern music while also
lending a new feel to the classical repertoire.
THE SOUND OF
..LIGHT POWER"
Compared
with conventional designs, Pioneer R-series speakers sound somewhat brighter
and at the same time richer. This effect was achieved by a carefully selected
and tested combination of numerous factors: selection of special material for
the woofer cone, balancing of the different speaker units, selection of
crossover network constants, adoption of the bass reflex principle in the
enclosure - without, however, causing that notorious "boominess" of
bass reflex constructions.
CAREFULLY
BALANCED BASS REFLEX DESIGN
In a bass
reflex system (in which the sound waves from the rear side of the woofer are
reflected, reversed in phase and radiated to the front through a special port),
careful selection and balancing of the speaker units and of numerous other
design parameters is extraordinarily important. In the Pioneer R-series, a
partition of sound absorbing material is provided in the enclosure, preventing
mutual interference of the speaker units and avoiding "standing
waves." This and the careful dimensioning of the port lends these speaker
systems their crisp bass response. What seemed to be impossible has been
realized: speaker sound that is momentous without being boomy, modern without
being untrue to the original.
ADJUSTMENT
OF LEVEL CONTROLS
The CS-R500
is equipped with continuous level controls for the MID and HIGH sound ranges.
To adjust these, first set the tone controls on the amplifier to their center
("flat") positions and turn high and low noise filters off. Then play
a familiar tape or record and adjust the two level controls on the speakers so
that you obtain the most pleasing sound. Rotation toward MIN decreases response
in the particular sound range, rotation toward MAX increases it.
FEATURES
25 cm
Cone-type Woofer
Use of newly
developed FB cone paper improves frequency response and gives the woofer its
excellent transient characteristics. The cone surface is especially coated over
to avoid partial vibrations, thereby resulting in vastly improving transient
characteristics and tonal qualify.
The woofer
edge is made of soft polyurethane foam which prevents distortions due to edge
resonances and improves stability under various temperature and humidity
conditions.
To permit
high power input and to avoid distortions caused by transient bass impulses, a
long-throw voice coil and an aluminu m sheet bobbin are used.
A large 12cm
ferrite magnet with a pure copper cap on its center pole suppresses harmonic
distortions, however little, in the middle range.
12 cm
Cone-type Mid-range Speaker
The
mid-range speaker, too, employs a cone made of special FB paper with its extra
strong magnet, its newly adopted center cap combined with rigid duralumin and
damper, and its hermetically sealed back chamber. Therefore, this speaker lends
itself to superb reproduction of the all-important mid sound range with
excellent response and freedom from distortions.
Horn Tweeter
The
diaphragm is made of a special polyester-type synthetic resin with excellent
stability against changes in temperature and humidity, and is vapor-coated with
aluminum. Together with the aluminum diecast horn, this construction explains
the very flat frequency response up to an ultra-high range and the wide sound
dispersion angle. The high and very high sound range has impact and presence
from any listening position.
Network
Design
provides for optimum speaker system frequency response. Stringent component
selection and use of a compensating circuit designed to limit woofer and mid
range impedances guarantee ideal transmission characteristics around the
crossover point, as well as good transient characteristics.
SPECIFICATIONS
Enclosure: Bass-reflex type
System: 3-way, 3-speaker system
Speaker:
Woofer
: 250 mm (10-inch) cone type
Midrange
: 120mm (5-inch) cone type
Tweeter
: Horn type
Frequency
Range: 35 to 20,000 Hz
Input
Impedance: 8 Ω
Sensitivity: 91 dB/W at 1 m
Max.Input
Power: 60 W
Crossover
Frequencies:
Lows -
Midrange : 650 Hz
Midrange -
Highs : 6,000 Hz
Dimensions
(W x H x D): 350 x 610 x 306 mm
(13-25/32" x 24" x 12-1/32")
Weight: 18,5 kg (40 lb 13 oz)
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