McIntosh C20 Instruction Manual page 18

Record
rnanufacturers, during
the past
two
or three years,
have rnade
a
deterrnined
effort
to rnake all records reproduce properly
by
using the RIAA
cornpensator
setting. Generally,
all new records
will perforrn well using RIAA or L.P. settings. However, if
a
record
sounds
better using the
compensator
at other positions
do not
hesitate to
use
it
that way.
10. A
Stereo
Tuner rnay be used
with the
C-20
by
plugging the
left
and
right
channels
into
Tuner Inputs No. I or No. 2.
When
the I'INPUT SELECTOR" switch is rotated to
the
"TUNERTT
positions, the record
cornpensator
preamplifier is
disconnected
and
the
compensator
controls will not
need
to be adjusted.
The "MODErr selector switch, "BALANCE
CONTROL,
" I'PHASE'I switch,
I'LOUDNESS
CONTROL,
r' and the '|BASS" and "TREBLEil controls, the "RUMBLE FILTER,'r "TAPE
JACKil switch, and the "VOLUME and OFF-ON" control all operate in this application
and
should
be used just the sarne as when listening to records or
any
other program. Refer
to
paragraphs l, Z, 3, 4, 5,
6 and 8 of
this
section.
A stereo tape rnachine with its
own
playback preamplifiers should be
plugged
into
the
tTTAFETI
inputs. (Not the "TAPE HEAD, inputs.) fhe inforrnation
on adjusting the
C-20
for
listening to a stereo tuner will also
apply
when
listening to
a
tape rnachine.
11.
The
C?0 stereo prearnplifier
rnay
be
used
with
tape decks which
do
not have playback
prearnplifiers.
Tape heads
require a
type
of playback cornpensation
sornewhat
the
sarne way
that rnagnetic cartri.dges do. Setting the cornpensator controls to the positions
rnarked
'rTAF,E' provides correct playback for tape heads and elirninates
the need of using playback
preamplifiers with
tape
decks. (Note, however, that
tlae
C-20
can
not
conveniently
be used
to
record on tape. If
you need
recording facilities in
a
tape rnachine, a recording prearnplifier
will be required.
In rnany tape machines this preamplifier serves
both playback
and
record
functions.
)
IZ.
Stereo
rnicrophones
rnay also be used
with the
C-20.
If the rnicrophones are low level
(1ow
output producing only
2
to
10
may be plugged
into either
an
unused
pair of
phono
low (2 to I0 MV) jacks
tape head
1ow
(2
to l0MV) jacks.
If the rnicrophones are rnediurn level l0 to 70 rnillivolts,
then they
either
an unused
pair of
phono
high (10 to
70
MV)
jacks or
an unused
pair
to
70
MV) jacks.
rnillivolts,
then
they
or
an unused
pair
of
rnay be plugged into
of
tape head
high (I0
When reproducing microphones in
phono
or tape head channels set the
'rBASSil
record
cornpensator
control to
rtorr and
the
TtTREBLE"
record
cornpensator
control
to 'rTrAPErr.
This
adjustrnent
gives
a
flat response for the rnicrophones.
AI1
of the
information
given
in para-
graphs 1, Z, 3, 4, 5, 6, and
8
of
this section
can apply
to
the use of rnicrophones as
prograrn
sources.
In the event that you should happen
to use very high
output
rnicrophones,
100
millivolts
and
up,
plug thern
into the auxiliary channel. In this
channel
the record
cornpensator
controls
do not operate and it will not be necessary to
adjust
them. All other inforrnation
on
rnicro-
phones
given
above
does apply.
13. Two tape rnachines can be used with the C-20 stereo prearnplifier. After
you
have
connected
your tape rnachine to the rear panel of the prearnplifier you rnay
have
someone
bring in
a
portable
rnachine
to
rnake a copy
of
one of
your
tapes
or to listen to
one of
his
tapes
on
your systern. With the C-20 you
no
longer
have
to
unplug
your
permanent
rnachine.
The
C-20
cornes supplied
with two
cables havi.ng phone
plugs
on one
en{ to plug into the
front
pan-
et of the C-20, and pin jacks on the other
end
to plug into
any
tape
rnachine. (Adapters
are
available
at
anry
Hi-Fi retailer to perrnit pin
plugs
to
connect
with
phone
jacks.
)
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