Concept receiver brochure 1978

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@©[N]@EPT

The Ultimate in
Sound Reproduction

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The Design

CONCEPT - the result of a concerted
effort to design a line of stereo
receivers without compromise in an?
area. Every detail. from the action 0
the controls to the surface area of the
internal heat sinks. has been carefully
thought out and crafted by a
distinguished. specialized international
team of designers and production
engineers. A laboratory standard of
performance is complemented by bold
visual definition. The final product is
an instrument that will satisfy the
most discerning audiophile.

There are five CONCEPT receivers,
expressions of the same design
philosophy. The more expensive
CONCEPT models are designed for
those who need more power or greater
control flexibility; yet the five
CONCEPTs are far more alike than
different. The sound is the same.

Experience the calm authority of
CONCEPT now. Look at it, operate it.
and most of all, listen to it. Youll find
the least expensive CONCEPT will prove
more exciting than the best competing
model. CONCEPT - the ultimate
synthesis Of the technical, the visual
and the tactile. There may be attempts
to copy it. but CONCEPT is the original.

The Controls

The CONCEPT receivers controls and
control layout provide you with full
access to the sonic excellence of the
circuitry. and the CONCEPTs versatility
will enhance the performance of the
rest of any system.

All of CONCEPTs binary (on-off)
functions are controlled by newly-
developed push switches. Light-
emitting diodes (LED's) are built into
the switches to provide positive visual
indication. These indicators, which
wont burn out, glow red on the tape
monitor switches and green on all
others. The tape monitor function has
been carefully thought out for the
most logical operation. It facilitates
the use of two tape machines in
conjunction with the CONCEPT; you can
monitor either deck and dub from one
to the other.

CONCEPT'S tuning assembly is yet
another manifestation of the total
design philosophy. A generous
machined tuning knob, attached to a
heavy flywheel. rotates smoothly with
a light touch for ease in station
changing and very precise tuning
adjustments. A slide-rule dial pointer
shows exactly the station selected.
even from across the room.

The Detail

The front panel is a heavy aluminum
extrusion with a rich brushed finish.
All markings are actual calibrations.
distinct and easily read. The dial
lighting has been carefully coordinated
for maximum visibility without glare.

The rear panel too is the result of
user-oriented study. All speaker and
antenna connections are made at
color-coded push terminals that
provide safe. positive contact. AC
convenience outlets are provided as
well, to facilitate hook-up of other
components.

CONCEPT - a receiver design
clearly thought out. and perfectly
executed. You can hear the result.

Concept 16.5

The magnificent CONCEPT 16.5 is the
ultimate expression of the CONCEPT
design philosophy. Engineered to
exceed the performance of expensive
component separates. the CONCEPT
16.5 is without peer as a receiver. The
16.5 is the only high-powered receiver
with fully independent dual power
supplies; two oversized power
transformers and four 10,000 p F
electrolytic capacitors help provide the
16.5 with an awesome power output.
And because neither channel ever
interferes with the other. the sound of
the 16.5 is uniquely unstrained.

All of the outstanding features
standard on the CONCEPT line are
incorporated in the 16.5, plus some
others that are unique. The 16.5 uses a
precision 5gang tuning assembly; and
there are two phono inputs with a
convenient switch that permits you to
A-B phono cartridges. Individual
industrialgrade relays are used to
switch the speaker systems.

The CONCEPT 16.5. Truly the ultimate
in sound reproduction.

16.5 Specifications

Power Amplilier Section

Continuous power output of 165 watts per
channel minimum RMS into 8 ohms (22.2
dBW). or 250 watts per channel minimum
RMS into 4 ohms (24 dBW). both channels
driven. from 20 to 20,000 Hz with no more
than 0.1% total harmonic distortion

Typical THD at Full Power: Less than 0.03%

FreBuency Response: 20 to 20.000 Hz 1 0.2 dB

IM istortion (50 Hz: 7 kHz = 4:1l: typically less
than 0.05%

1V Peakrto-Peak Rise Time: 2 pSec.

Damping Factor: Greater than 450 at 20 Hz

Hum and Noise. weighted: -- 90 dB

Outputs: Speakers A. B. C or any 2 together; 2
Lo-Z headphone

Preamp Section

Input SensitiVity:
Phone 1 a Phone 2. 1.9 mV,
Tape 1 & Tape 2,160 mV

Phono Overload: 200 mV

Phone Frequency Response: 30 to 15.000 Hz.
2 0.2 dB to RIAA curve

Tone Controls.
Bass. 1 6 dB at 50 Hz in 2dB steps;
Mid Bass. 1 10 dB at 100 Hz in 1 dB steps
Treble. 2 6 dB at 20.030 Hz in 2 dB steps
Mld Treble. : 10 dB at 10,000 Hz in 1 dB
steps

Loudness Contour at -30 dB at maximum
Setting: +8 (18 at 100 HZ. +4 dB at 10.000

Hz
High Filter: -10 dB at 7.5410 Hz. 6 dB/octave
Volume Control Balance: within 0.3 dB tracking
Signal-to-Noise Ratio:
Phone 1 8t Phono 2. 78 dB unweighted. 84
dB weighted;
Tape 1 & Tape 2. 85 dB
Main In. 90 dB
Residual Hum and Noise 0.5 mV
Crosstalk at 1 kHz: -65 65

FM Tuner Section"
Sensitivity: 9.3 {151 (1.6 pV) at 3009
50 dB Quieting Sensitivity: mono. 13.2 dBf
(2.5 pV); stereo. 36.4 dBf (35 pV)
Signal-to-Noise Ratio at 65 dBt: 72 dB
Stereo Separation: 52 dB at 1 kHz. 42 dB at 100
Hz. 40 dB at 10 kHz
Distortion at 65 dBf. mono. 0.08%; Stereo. 01%
Frequency Response: 30 to 15.000 Hz 2 0.5 dB
Capture Ratio: 0.9 dB
Alternate Channel Selectivity: 90 dB
Spurious Response Ratio: Better than 110 dB
lma Response Ratio: Better than 110 dB
IF esponse Ratio: Better than 110 dB

AM Tuner Section

IHF Sensnivity: 175 pV/m
Image Response Ratio: 67 dB
Signal-to-Noise Ratio: 50 GE

General

Dimensions:
Width. 21%" (53.7 cm)
Height. 7" (17.8 cm)
Depth. 17" (43.2 cm)

Weight: 67 lbs. (30.5 kg)

Measured in accordance with the Federal Trade
Commission rule on power output claims.

Measured in accordance with the latest IHF
standards.