Concept 16 5 b 2

Page 2

The Circuitry

The hallmark of the CONCEPT
receiver is a standard of accuracy
unmarred by significant audible or
measurable distortion. This standard
has been achieved by selecting only
premium-quality parts, and operating
them at far below their rated
capabilities. An added benefit of this
approach is a dramatic increase in
reliability.

The CONCEPT power amplifier ranks
with the best separate models. Output
circuitry is direct-coupled - a design
that greatly contributes to CONCEPTS
vanishingly low distortion. The rugged
output transistors are mounted on
aluminum heat sinks that provide the
optimum surface area for maximum
heat dissipation, promoting longer
component life. The topof-the-Iine 16.5
uses dual, fully independent power
supplies for its prodigious output.

Massive extruded aluminum heat sinks.

CONCEPT amplifiers exhibit
exceptionally good rise time for
instantaneous response to an input
signal. Even the sharpest musical
transients (as a cymbal or harpsichord)
are reproduced with the precise clarity
of the original. This clarity is further
enhanced by reducing transient .
intermodulation distortion (T N) to
insignificant levels.

10 kHz square wave at full power. Top
trace is generator. bottom is Co~csPr

http://ckopfcll.com/Conccpt8.jpg

The am lifier circuitry is protected
with an S R (Silicon Controlled
Rectifier) clamp that instantly shuts
off the output power supply in the
event of a short circuit. The
expensive power transformers are
separately protected as well.

CONCEPT power specifications are
the guaranteed minimum for that
receiver. CONCEPT receivers typically
exceed their ratings by enerous
margins - further bane it of the
ambitious design philosophy.

Engineering excellence extends to
the phone preamplifier. CONCEPT
receivers combine careful circuit
layout with only the best low-noise
transistors, resistors and capacitors. to
achieve a superb signal-to-ncise ratio
and eliminate any trace of background
noise, even at high volume. RIAA
equalization, critical for accurate
reproduction. is exact to within twaa
tenths of 1 dB. A wide dynamic range
assures that the loudest musical
crescendos won't introduce distonion
into the preamp stage.

Only properly designed tone
controls are of real value in adjusting
the sound to your taste and room
acoustics. and CONCEPT uses a
negative feedback desl n to permit
adjustment without ad ing distortion.
The controls are calibrated in 20
increments of 1 dB each, and provide
maximum effect at the most useful
points of the frequency spectrum.

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Effect ol CONCEPT tone controls. Red lines
are the additional extreme frequency
controls of the 5.5, 11.0 and 16.5.

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Even the volume control is a
premiumquality part. it permits
adjustment in discrete increments and
preserves channel balance within V:
dB over its full range, thus avoiding
any differences In channel level that
could affect musical perspectives. A
reed relay mutes the output between
functions to eliminate irritating
thumps and pops.

CONCEPTS FM tuner section ranks
with the best separate tuners. A dual~
gate, lownoise MOS FEl is used in
the tuners front end to give it both
high sensitivity and excellent
immunity from overload. The IF
section makes optimal use of
monolithic IC, hand-picked linear
phase ceramic filter elements and a
full Quadrature detector. the multiplex
decoder uses the latest Phase-Locked
Loop circuitry. These are just a few of
the circuit features that contribute to
CONCEPTS outstanding FM

Advanced tuner circuitry rivals the
performance of the best separates.

specifications: superb slgnaltonoise
and capture ratios. flat frequency
response, unusually low distcnion,
and outstanding stereo separation
across the full requency range. in
fact, several of the 16.5 specifications
exceed the limits or the best test
equlpment. Even the CONCEPT AM
section has a handpicked ceramic
filter to lower its distortion.

Great care has also been taken to
make finding a station as pleasant as
listening to it; the FM muting circuit
uses a reed relay to provide total
silence when tuning between stations.

But the proof of a receiver is in the
listening: Listen to CONCEPT. and
discover the ultimate in sound
reproduction.

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meUltirmteinSodeeproaiction

CBS Inc.
1601 W. Glenlake Ave.
ltasca, lllinois 60743

04/21/06 23:58:54