McIntosh C20 Owner's Manual page 5

INPUT SELECTOR
INPUT SELECTOR
PHONO 1
S
2
TUNER
1
TAPE
A U X
This ten-position program switch connects the
C20 as follows:
AUX ... any auxiliary service, such as a television
set, an extra tuner, or any other program source
requiring flat amplification.
TAPE . . . any self-contained tape machine (tape
machine having its own playback preamplifier).
TUNER 1 & 2 . . . AM and FM outputs from a
stereo tuner or a pair of stereo tuners.
PHONO 1 & 2 — S & M . . . stereo or monophonic
operation with the following types of phono car-
tridges.
a. Constant amplitude cartridges such as crystal,
ceramic, or frequency-modulated devices.
b. Magnetic cartridges having an output of 10mv
or more. Maximum input voltage for this output
is 70mv.
c. Magnetic cartridges having an output of less
than 10mv.
TAPE HEAD—1 & 2 ... a tape deck or a pair of
tape decks that do not contain their own playback
preamplifiers. Two types of tape head outputs can
be used in this position.
a. Tape heads having an output of less than 10mv.
b. Tape heads having an output of 10mv or more.
Maximum input voltage for this output is 70mv.
MODE SELECTOR
MODE SELECTOR
L
STEREO
REV
This six-position switch connects the C20 for
proper left-right distribution of sound for the program
source selected. Its positions are as follows:
REV . . . connects left channel to right speaker,
right channel to left speaker, corrects for left-
right reversal of program.
STEREO . . . this is the normal stereo MODE
SELECTOR position; left channel to left speaker,
right channel to right speaker.
M
S
PHONO 2
M
1
TAPE HD
2
R
M LEFT
M RIGHT
L . . . left channel to left speaker, no program to
right speaker.
R . . . right channel to right speaker, no program
to left speaker.
M LEFT . . . left channel only to both speakers.
M RIGHT . .. right channel only to both speakers.
RECORD COMPENSATOR
RECORD COMPENSATOR
BASS
400 RIAA
UP
300
TAPE
0
These controls are used to correct for program
equalization introduced by the recording process.
Table 3 gives the recommended settings of the RECORD
COMPENSATOR controls of the C20 for monophonic
recordings.
BASS AND TREBLE
BASS
°
- +
There are two tone controls on the C20—BASS
and TREBLE.
BASS . . . clockwise rotation increases bass loud-
ness; counterclockwise rotation decreases bass
loud ness.
TREBLE . . . clockwise rotation increases treble
loudness; counterclockwise rotation decreases
treble loudness.
PHASE
0°
This two-position switch reverses the phase in the
left channel to correct for speaker or program phasing.
TREBLE
-10 -12
RIAA
-5
LP
TAPE
TREBLE
°
- +
PHASE
180°
3