Main And Remote Spkr Switches; Power Switch; Front And Rear Phones Jacks; Loudness - Marantz 4270 Instructions Manual

or to monitor the tape on a three-head recorder
during recording, place the MONITOR (TAPE/
SOURCE) pushswitch in the "TAPE" (in) posi­
tion.
During recording, the MODE Switch should be
in the DISCRETE, VARI-MATRIX or SO DE­
CODER positions. This applies the source signal
unchanged, directly to the tape outputs. '
To record a discrete 4-channel source on a 2­
channel recorder, put the MODE Switch in the
2 CH position. Leave the TAPE/SOURCE button
in the SOURCE (out) position while recording.
This will feed the sum of the left-front and left­
rear inputs to the left-front TAPE MONITOR
OUT jack, and the sum of the right-front and
right-rear inputs to the right-front TAPE MONI­
TOR OUT jack.
To record any type of source on a monaural
recorder, put the MODE Switch in the MONO
position. Leave the TAPE/SOURCE button in
the SOURCE (out) position while recording.
MAIN AND REMOTE SPKR SWITCHES
These switches select the loudspeaker terminals
to which audio power is fed. The MAIN and
REMOTE groups of loudspeakers may be operat­
ed separately or simultaneously. With both
speaker switches in the "out" position, all loud­
speakers are disconnected. The signal at the
FRONT and REAR PHONES jacks is not affected
by the MAIN and REMOTE SPKR Switches.
NOTE: When using hoth MAIN and REMOTE
speakers simultaneously, the combined
impedance of all the speakers should not
be less than 4 Ohms.
POWER SWITCH
This pushswitch turns the Power on or off. When
the POWER Switch is "in", the dial lamp illumi ­
nates. Be sure to turn the POWER pushswitch
off before plugging or unplugging the power cord.
FRONT AND REAR PHONES JACKS
These jacks accept a standard 3-conductor phone
plug employed with standard stereo or 4-channel
headphones. When using 2-channel headphones,
insert the plug into the FRONT PHONES jack.
When using 4-channel headphones, insert the
front plug into the FRONT PHONES jack and
the rear plug into the REAR PHONES jack.
Either high- or low-impedance headphones may
be used.
LOUDNESS
When listening at low levels, set this switch "in".
The LOUDNESS Switch boosts bass and treble
tones to compensate for the human ear's lack of
response to those frequencies at low volume
levels.
HI FILTER SWITCH
With this pushswitch set "in", the High Fre­
quency Filter suppresses high frequency noise,
such as "scratch" from worn phonograph records
and tape "hiss". The filter will also slightly
reduce high frequencies in the program material.
When the program does not have high frequency
noise, the HI FILTER pushswitch should be
"out".
TUNING METER
The Model 4270 is equipped with two meters,
a SIGNAL-STRENGTH Meter and anFM TUNING
Meter. The SIGNAL-STRENGTH Meter indicates
the signal-strength of any AM or FM broadcast.
The FM TUNING Meter operates on FIVI only and
indicates correct station tuning. The SIGNAL ­
STRENGTH Meter acts as a Dolby Calibration
Meter when the DOLBY Switch is in any position
other than "OFF".
TUNING
AM: For optimum AM reception, tune to the
desired station. Then, rock the TUNING knob
slightly back and forth until the maximum
reading is obtained on the SIGNAL-STRENGTH
Meter. The FM TUNING Meter is not used for
AM.
FM: Set the SELECTOR Switch to "FM" and
tune to the desired station. Then, slowly rock
the TUNING knob back and forth until the FM
TUNING Meter points to the center scale posi­
tion.
,.--- - - - - LE FT CH A N N EL
CO M MON
L..-.----RIGH T CHAN N EL
Figure 10. Stereophone Plug
9