Installation - McIntosh C20 Owner's Manual

VOLUME
VOLUME
OFF
The combined VOLUME control and OFF-on
switch controls the volume for both channels and
switches line power to four black receptacles on the
back panel.
The C20 can be installed in conventional cabinets,
custom built-ins, or professional equipment racks. If
the unit is to be placed on a shelf or table-top, it is
recommended that it be housed in
L-66 cabinet. Install the
cabinet; not from the rear.
When mounting the
of wood panel should be 1/4" in order to support the
weight. Panels up to 1" thickness
front panel of a cabinet
warping a shelf is required to support the rear of the
chassis. When mounted on a metal
is not needed.
The C20 installation should allow at
behind the front panel to allow about 1-1/2" for con-
nectors. The desireable width and height are, 16-1/2"
and 5-1/2", respectively,
space for circulation of air. These are inside dimensions.
The front panel mounting
are 16-3/8" and 5", respectively.
M A K I N G THE FRONT PANEL CUTOUT
The panel is cut out using the "FRONT PANEL
CUTOUT TEMPLATE." To position
front of the panel, make two locating holes from the
back (inside) of the panel using one of the mounting
strips (1/2" by 3-1/2") as a measuring tool. Proceed
follows:

INSTALLATION

a Mclntosh Model
C20 from the front of the
C20 the minimum thickness
may be used. If the
is made of wood, to prevent
rack panel, a shelf
least 13-3/4"
so there* will be sufficient
space width and height
the template on the
as
A VERTICAL CENTER LINE
Figure 2. Cutout Measurements
LOW FREQUENCY TRIM
LOW FREQUENCY
LEFT RIGHT
These controls, located on the back panel, com-
pensate for unequal speaker response at low frequen-
cies due to location of speakers in a room or differ-
ences in speaker efficiency. It provides 6db boost at
50 cycles starting from 500 cycles or 8db cut at 20
cycles starting from 200 cycles.
Determine the exact center of the proposed cutout
area. Scribe a vertical center line from the top of the
panel to the top surface of the shelf as illustrated in
"A", Figure 2. Using one of the mounting strips as a
measuring tool, draw a horizontal line 3-1/2" above the
shelf. (See "B", Figure 2.) Place a mounting strip along
the horizontal line to the left of the vertical center line
and mark a point 3-1/2" left from the vertical center
line. Repeat this procedure and mark a point 3-1/2" to
the right of the vertical center line. These points should
now be 3-1/2" up from the top of the shelf and 7"
apart, one 3-1/2" to the left and one 3-1/2" to the right
of the vertical center line. (See "C", Figure 2.) Drill a
3/16" hole at each point. Hold the drill perpendicular
to the panel so that the hole will be located accurately
on the front of the panel.
Position the template on the front of the panel
using the two locating holes to line it up correctly.
Scribe the rectangular opening on the front panel and
mark the position of the six mounting holes. Drill the
six 3/16" mounting holes before cutting the panel
opening. Then cut out the opening. It is important that
the cutout be just within the lines.
SHELF MOUNTING
If the installation requires a
Positions "A" to "C" show the location of the
vertical center line, the use of the measuring
tool (mounting strip) to locate the horizontal
center line, and how to measure off the two
points to the right and left of the vertical
center line.
TRIM
shelf, proceed as
5