C22 STEREO PREAMPLIFIER
GENERAL DESCRIPTION
The Mclntosh C22 Stereophonic Pream-
plifier is a control center for any stereophonic
sound system. To increase your enjoyment of
stereo, this control center does four jobs with
precise control.
First, the control center amplifies weak
electrical impulses. As the record rotates on
the turntable, undulations in the grooves
move the pickup stylus approximately one
thousandth of an inch, in any direction, from
the rest position. From this slight mechanical
movement, the pickup stylus generates a
weak electrical impulse on the order of a few
thousandths of a volt. To amplify and pre-
serve the information in such an electrical
impulse, the finest amplifier performance is
required.
Second, every sound system is used in a
different acoustical environment. The tone
balance of the music is affected by variations
in environment. Also, people listening to the
music have varying ideas of correct tone bal-
ance. To compensate for these conditions, a
high-quality tone control center is needed.
Third, all stereophonic and monophonic
records, both domestic and foreign, are
recorded with specific frequency equaliza-
tion. The control center must accurately com-
pensate for this equalization introduced in
the recording process.
Fourth, programs can originate from sev-
eral sources such as tuners, records, tape
machines, microphones, etc. A control center
is needed to select and switch these sources
separately or in combination.
All of these jobs are performed with excel-
lence by the C22.
The C22 also uses the new, exclusive
Mclntosh PANLOC method of installation.
The PANLOC system gives you absolute ease
of installation, operation, and maintenance.
PANLOC is the first professional installation
technique to be used on stereo instruments.
In the PANLOC system a metal shelf is
mounted first, then the preamplifier slides
into position on this shelf. Depressing the
PANLOC buttons on the front panel locks the
preamplifier firmly into place for normal
operation. To unlock the preamplifier, de-
press the front panel PANLOC buttons a
second time. The preamplifier can now slide
forward to the ADJUST position. The pre-
amplifier will lock in this position approxi-
mately 3 inches from the mounting panel.
Now you can adjust the output level controls,
low frequency trim controls, tape equaliza-
tion controls, phase switch and pilot lamp
intensity switch. These controls are mounted
just behind the C22 front panel. Depressing
the ADJUST position holding latches on the
sides of the chassis allows the preamplifier
to be taken out of the PANLOC shelf, or to
slide back into position against the mounting
panel.
Once you have enjoyed the outstanding
performance of the C22, you will understand
why Mclntosh products have earned their
reputation as "THE BEST." Your Mclntosh
C22 Stereophonic control preamplifier will
give you years of the finest possible perform-
ance, and will become a highly valued part of
your home music system.
TECHNICAL DESCRIPTION
The C22 Stereophonic Preamplifier com-
bines excellence in performance with ease of
operation. The most often used controls have
large diameter knobs. A new type of rocker
switch is used for the controls with simple
on-off functions. The C22 has an illuminated
front panel with a light intensity switch to
provide convenient reading under low-level
lighting conditions. The Mode and Input
Selector switch positions are also illuminated.
The C22 circuit consists of 3 amplifier
sections in duplicate for the left and right
stereo channels together with a common
power supply. The first amplifier section is
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