McIntosh C20 - Spezifikationen PDF herunterladen (Seite 7)

VOLUME

LOW FREQUENCY TRIM

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.

LOW FREQUENCY TRIM

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.

INSTALLATION

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 a Mclntosh Model

L-66 cabinet. Install the C20 from the front of the

cabinet; not from the rear.

When mounting the C20 the minimum thickness

of wood panel should be 1/4" in order to support the

weight. Panels up to 1" thickness may be used. If the

front panel of a cabinet is made of wood, to prevent

warping a shelf is required to support the rear of the

chassis. When mounted on a metal rack panel, a shelf

is not needed.

The C20 installation should allow at least 13-3/4"

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, so there* will be sufficient

space for circulation of air. These are inside dimensions.

The front panel mounting space width and height

are 16-3/8" and 5", respectively.

MAKING THE FRONT PANEL CUTOUT

The panel is cut out using the "FRONT PANEL

CUTOUT TEMPLATE." To position the template on the

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 as

follows:

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

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 shelf, proceed as

A VERTICAL CENTER LINE

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.

Figure 2. Cutout Measurements

1 2 3 4 5 6 7 8 9 10 11 12 ... 19 20

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